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Rezultatele pentru adsorption isothermRezultate gasite: 306
Methyl tert- butyl ether occurrence and degradation in water
Environmental Engineering and Management Journal › Vol. 6 › Nr. 2 The use of gasoline oxygenated with MTBE (methyl tert-butyl ether) reduced significantly air pollution (16 - 23% lower emissions of CO and 18% lower emissions of unburned hydrocarbons) but increased water pollution. There is no European or national regulations for MTBE in drinking water except for Denmark, which has set a limit value of 30 µg/ L for MTBE. USEPA proposed a maximum concentration of 20- 40 µg/L. This paper is a review with 70 references on the MTBE production, use, properties and... Autori: Camelia Beţianu, Florina Ungureanu, Loredana Branza, Lucian Vasile Pavel, Maria Gavrilescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25122
Marine micro and macro algal species as biosorbents for heavy metals
Environmental Engineering and Management Journal › Vol. 6 › Nr. 3 AbstractThis paper reviews some practical aspects of the application of algal biomass for the biosorption of heavy metals from wastewater. The ability of different algal species to remove metals varies with algal group and morphology, with the speciation of specific metals and their competition with others in wastewater, and with environmental or process factors. The scattered literature on the uptake of heavy metals by both living and dead algal biomass - both macroalgae and immobilized microal... Autori: Loredana Branza, Maria Gavrilescu, Matthew J. Dring ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25133
Layered double hydroxides as potential solid for obtaining more environmentally friendly pesticides
Environmental Engineering and Management Journal › Vol. 6 › Nr. 4 AbstractThe paper describes the synthesis and characterization of layered double hydroxides (LDH) intercalated with 4,6-dinitro-o-cresol(DNOC) and 2,6-dichlorobenzonitrile (2,6DBN) by anionic exchange method. The incorporation of the organic pesticides in the structure of layered double hydroxides can offer premises to increase the pesticide active life by reducing its volatilization, controlling the release of the pesticide from the layered structure and decreasing the pesticide adsorption in s... Autori: Gabriela Lisa, Marcel Ionel Popa, Mihaela Frunza ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25144
Electrical properties of SnO2-Pt/Al2O3 in reduction atmosphere
Environmental Engineering and Management Journal › Vol. 6 › Nr. 5 AbstractCatalysts having mobile electrons in bulk such as metals and semiconductors are good solid materials for red/ox type of reaction (oxidation) and can be effectively used in gas sensing devices as well. The aims of this work were: (i) to investigate the surface behavior of Pt(0.28%)/Al2O3 and SnO2(2.94%)-Pt(0.28%)/Al2O3 samples in inert atmosphere (He) and in reducing atmosphere containing helium-cyclopropane gas mixture under ambient condition (i.e., room temperature, atmospheric pressure... Autori: , Cornel Munteanu, Jozsef Kovacs, Mariana Scurtu, Monica Caldararu, Tatiana Yuzhakova ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25146
Equilibrium isotherms studies for sorption of lead ions from aqueous solutions using Romanian peat sorbent
Environmental Engineering and Management Journal › Vol. 6 › Nr. 5 In this work, the ability of Romanian peat for sorption of Pb (II) ions from aqueous solution has been determined using the batch experimental techniques. The sorption equilibrium has been studied at different pH values. The equilibrium adsorption level was determined to be dependent of the pH of solution and initial Pb(II) concentration.The equilibrium adsorption capacity of Romanian peat sorbent for lead has been described by seven types of mathematical model isotherms, namely: Freundlich, Lan... Autori: Brindusa Robu, Corneliu Cojocaru, Laura Bulgariu, Matei Macoveanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25160
Environmental Engineering and Management Journal, Vol. 1 Nr. 3
Environmental Engineering and Management Journal › Vol. 1 › Nr. 3 Contain all the articles from this issueICEEM/01 -- Environmental Engineering SectionThermodynamic and kinetic study of gas desulphurization by adsorption on zeolites Ion Untea, Dan Brasoveanu, Madeleine Dancila, Szidonia Bocskor Mixed oxides derived from vanadium substituted layered double hydroxides as catalysts precursors for SO2 oxidationGabriela Carja, Ionel Popa, Gabriela Ciobanu, Nicolae Aelenei The impact of energy production on environment in RomaniaCarmen Zaharia, Mioara Sur... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25168
Environmental Engineering and Management Journal, Vol. 6 Nr. 5
Environmental Engineering and Management Journal › Vol. 6 › Nr. 5 Include urmatoarele articole:â€? Keynote Lectures Energy from municipal solid waste: large-scale incineration or small-scale pyrolysis?â€? Electrical properties of SnO2-Pt/Al2O3 in reduction atmosphereâ€? Corporate management tools to address sustainability Challenges. A reflection on the progress and difficulties experienced during the last decadeâ€? Emerging academic responsibilities and opportunities for promoting regional sustainabilityâ€? Challenges for integrated water resources management... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25200
Environmental Engineering and Management Journal, Vol. 9 Nr. 1
Environmental Engineering and Management Journal › Vol. 9 › Nr. 1 ? Kinetics considerations concerning the oxidative degradation by photo-fenton process of some antibiotics
? Catalytic wet hydrogen peroxide oxidation of 4-chlorophenol over iron-exchanged clays
? Researches on the negative effects assessment (slugging, clogging, ash deposits) developed at the biomass-coal co-firing
? Contribution to the study of the environmental heritage of a former chemical plant
? Impact of chemicals on derivatives with important therapeutic activity in C... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25376
Environmental Engineering and Management Journal, Vol. 7 Nr. 3
Environmental Engineering and Management Journal › Vol. 7 › Nr. 3 Include urmatoarele articole:â€? Cost sensitivity analysis by Monte Carlo simulationâ€? Mathematical modeling of gas drying by adsorptionâ€? Methyl isobutyl ketone combustion over Pt/Al2O3 catalystâ€? Distribution of oxygen transfer rate in stirred bioreactors with simulated brothsâ€? Unsteady heat transfer inside an elliptic cylinderâ€? Triphasic external-loop airlift reactors. Hydrodynamic and dispersion studiesâ€? Sustainable combined utilization of renewable forest resources and coal in Roma... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25209
Study concerning the influence of oxidizing agents on heterogeneous photocatalytic degradation of persistent organic pollutants
Environmental Engineering and Management Journal › Vol. 6 › Nr. 6 AbstractIn this paper, the application of the heterogeneous photocatalysis in degradation of a cationic copper phtalocyanine dye, used as model of persistent organic compound is investigated by assessing the efficiency of the process. The influence of hydrogen peroxide on the photocatalytic process is studied using two types of commercial catalysts, such as TiO2 Degussa (88% anatase, 20% rutile) and TiONa Millennium (100% anatase). Another electron acceptor, FeCl3 is also used for investigation ... Autori: Anca Florentina Caliman, , , Ioannis Poulios, Maria Gavrilescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25211
Modelling of sorption equilibrium of Cr(vi) on isomorphic substituted Mg/Zn-Al - type hydrotalcites
Environmental Engineering and Management Journal › Vol. 6 › Nr. 6 AbstractThis paper dealt with Cr(VI) sorption on isomorphic substituted Mg/Zn-Al - type hydrotalcites under proper working conditions. The prepared samples were named Mg3Al, Mg2ZnAl, Mg1.5Zn1.5Al, MgZn2Al and Zn3Al. The experimental data concerning sorption isotherms were modelled in accordance with four equilibrium equations: Langmuir (L), Freundlich (F), Langmuir-Freundlich (L-F) and Redlich-Peterson (R-P) by using two ways: (i) estimation of qmax, K and n; and (ii) estimation of K and n, for ... Autori: Aurel Iovi, Eveline Popovici, Laura Cocheci, Rodica Pode ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25215
Removal of cadmium (II) from aqueous solutions by sphagnum moss peat: Equilibrium study
Environmental Engineering and Management Journal › Vol. 7 › Nr. 1 AbstractCadmium is listed by US-EPA as one of priority pollutant and as a known carcinogen, and therefore its removal from wastewaters of various industrial processes is a very important environmental problem. The paper analyzes the effectiveness of a Romanian sphagnum moss peat as available and cheaper sorbent in removal of Cd (II) from aqueous solutions. Batch sorption experiments were carried out in order to establish the influence of solution pH, peat dose, contact time and initial cadmium c... Autori: Catalin Balan, , Matei Macoveanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25231
Surfactant - modified natural zeolites for environmental applications in water purification
Environmental Engineering and Management Journal › Vol. 7 › Nr. 2 AbstractThis paper presents an overview of research related to use of surfactant modified natural zeolites (SMZ) in water and wastewater treatment. The most common natural zeolite, widely used as starting material is clinoptilolite, but other natural zeolites have also been used (chabasite, heulandite, mordenite). In the first part, the preparation methods and the influence of process parameters on the final product properties is reviewed. The discussion is focused on the influence of surfactant... Autori: , Cezar Catrinescu, Roxana Elena Apreutesei ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25241
Sorption of cationic dyes from aqueous solution onto natural clay. Equilibrium and kinetic study
Environmental Engineering and Management Journal › Vol. 7 › Nr. 3 AbstractEquilibrium and kinetic studies regarding the sorption of the copper phtalocyanine dye Alcian Blue 8 GX were carried-out within batch experiments. The sorption equilibrium revealed that the pure natural clay can uptake up to 18 mg of Alcian Blue 8 GX per 1 g mass of clay. The cationic dye sorption was best fitted by Freundlich model that is applicable to sorption on heterogeneous surfaces (surfaces with non-equivalent energetic sites). The pseudo-second order kinetic model may be efficie... Autori: , Maria Gavrilescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25257
Textural properties of chabazite crystalized from Cs+, Na+ - aluminosilicate gels
Environmental Engineering and Management Journal › Vol. 7 › Nr. 3 AbstractZeolites Cs+, Na+-chabazite with SiO2 /Al2O3 ratio of 7 were prepared from gels with molar composition (2.41-2.73)(Cs+ + Na+)2O : (0.02 TPAOH) : Al2O3 : 7.21 SiO2 : (194-204) H2O in static hydrothermal conditions at 108 – 132 0C for 8-21 days. The solids were characterized by X - ray diffraction, scanning electron microscopy, thermal analysis and nitrogen sorption measurements. The nitrogen sorption isotherms at -1960C present a hysteresis loop which is indicative for the existence of ... Autori: Ionela Droahna, Iuliean Asaftei, Nicolae Bilba ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25266
Mathematical modeling of gas drying by adsorption
Environmental Engineering and Management Journal › Vol. 7 › Nr. 3 AbstractTheoretical and experimental studies of gas drying processes by adsorption in fixed bed of grains are presented in this paper. Based on an extensive literature study, some of the most representative mathematical models describing gas adsorption in fixed bed and consequently gas drying processes by adsorption in fixed bed are also presented. Using a mathematical model from those mentioned describing adsorption under isotherm regime, the temperature and gas flow velocity effects over the d... Autori: Marius Sebastian Secula, Stelian Petrescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25272
Environmental Engineering and Management Journal, Vol. 9 Nr. 3
Environmental Engineering and Management Journal › Vol. 9 › Nr. 3 ? Denitrifying activity of activated sludge in suspension and in biofilm? Denitrifying potential of an activated sludge derived consortium? Biosorption of hexavalent chromium based on modified Y zeolites obtained by alkali-treatment? Identifying anaerobic digestion models using simultaneous batch experiments? Olive mill wastewater as a renewable resource? Influence of innoculum acclimation in the biodegradation rate and estimated biodegradbility of cow manure, food waste and oil? Studies on the ... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25378
Advanced Cd2+ removal on dispersed TioO2-fly ash
Environmental Engineering and Management Journal › Vol. 7 › Nr. 4 AbstractThe paper proposes a suitable solution for a one step treatment process of the wastewaters resulted from the textile industry, using a mixture of anatase and modified fly ash. The dyes photo-degradation on TiO2 anatase is well known. The use of fly ash in advanced wastewater treatment, for heavy metal adsorption, represents an environmental friendly process, efficient if the fly ash surface charge is controlled by solubilisation/reprecipitation. The first step in implementing the single ... Autori: Anca Duta, Maria Visa ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25292
Removal of nickel from aqueous solution by Nordmann FIR (ABIES Nordmanniana (STEV.) SPACH SUBSP. Nordmanniana) cones
Environmental Engineering and Management Journal › Vol. 7 › Nr. 4 AbstractBiosorption an alternative process is the uptake of heavy metals from aqueous solutions by biological materials. The biosorption of nickel ions from aqueous solution was investigated by Nordmann fir (Abies nordmanniana (Stev.) Spach. subsp. nordmanniana) in a batch adsorption system as a function of pH, initial metal concentration, biomass dosage, contact time. The data showed that the maximum pH for efficient sorption of Ni(II) was 6.5. At the optimal conditions, Ni(II) ion biosorption ... Autori: Handan Ucun, Ozkan Aksakal, Yusuf Kaya ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25295
Microbial cellulose as support material for the immobilization of denitrifying bacteria
Environmental Engineering and Management Journal › Vol. 7 › Nr. 5 AbstractThe purpose of this study was to investigate the immobilization of denitrifying bacteria on microbial cellulose (MC) for biological denitrification. A novel denitrifying bacterium, Pseudomonas stutzeri, was immobilized in microbial cellulose and introduced into an up flow packed bed reactor in order to remove nitrate from synthetic influent. The MC presented the high biomass concentration throughout the experiment, achieving 3.4 mg biomass/g support. The efficiency of the system for deni... Autori: Abbas Rezaee, Hatam Godini, Hossein Bakhtou ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25302
Equilibrium study of Pb(II) and Hg(II) sorption from aqueous solutions by moss peat
Environmental Engineering and Management Journal › Vol. 7 › Nr. 5 AbstractThe sorption of Pb(II) and Hg(II) ions from aqueous solutions by moss peat (from Poiana Stampei, Romania) was studied in a batch system. The data obtained from experiments of a single-component sorption were analyzed using Langmuir and Freundlich models. The Langmuir equation describe sorption isotherm of Pb(II) and Hg(II) with high correlation coefficients, and better than Freundlich model. According to the Langmuir model, the maximum uptake capacities of moss peat for Pb(II) and Hg(II)... Autori: Dumitru Bulgariu, Laura Bulgariu, Matei Macoveanu, Mioara Răţoi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25311
Investigations on the possibility of natural hemp fibers use for Zn(II) ions removal from wastewaters
Environmental Engineering and Management Journal › Vol. 7 › Nr. 6 AbstractNatural hemp fibers have been evaluated for Zn (II) ions sorption from diluted aqueous solutions. In order to establish the optimum conditions, the effect of initial pH of solution, hemp dose, Zn (II) concentration, temperature and contact time of phases on the Zn (II) sorption by natural hemp has been studied. To model the Zn (II) sorption at three different temperatures the Langmuir and Freundlich isotherms have been used. The Langmuir maximum sorption capacities were determined as bei... Autori: Carmen Paduraru, Lavinia Tofan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25336
Adsorption of N-hexane vapors onto non-functionalized hypercrosslinked polymers (hypersol-macronet TM) and activated carbon: Equilibrium studies
Environmental Engineering and Management Journal › Vol. 8 › Nr. 1 AbstractTwo non-functionalized hypercrosslinked polymeric resins type Macronet (MN 202 and MN 250) were employed to remove nhexane vapors from gas phase. A comparison of the equilibrium behavior of these hypercrosslinked resins and a bituminous granular activated carbon was made. The initial n-hexane concentration in the air stream ranged from 2100 to 4500 ppm and the adsorption temperatures were 30oC, 40oC and 50oC. The results showed that the MN 250 presents the higher adsorption capacities of... Autori: Adela Marilena Buburuzan Haleta, Cezar Catrinescu, Matei Macoveanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25341
Removal of some environmentally relevant heavy metals using low-cost natural sorbents
Environmental Engineering and Management Journal › Vol. 8 › Nr. 2 Abstract The sorption of metal ions from aqueous solution plays an important role in water pollution control and in recent years there has been considerable interest in the use of low-cost adsorbents. Many researchers have tried to exploit naturally occurring materials as low-cost adsorbents, for removing of heavy metals. In this article the removal performance of various low-cost adsorbents derived from agricultural waste or natural material is evaluate... Autori: Raluca Maria Hlihor, Maria Gavrilescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25379
Environmental Engineering and Management Journal, Vol. 8 Nr. 1
Environmental Engineering and Management Journal › Vol. 8 › Nr. 1 Include urmatoarele articole:â€? CsHSO4/mesoporous silica composites - new electrolytes for solid acid fuel cellsâ€? Trend in exhaust emissions from in-use gasoline vehiclesâ€? Analysis of distribution of oxygen transfer rate in stirred bioreactors for bacterial brothsâ€? Electrochemical characteristics of Ti6Al7Nb alloy in Ringer's solutionâ€? Pulsed high voltage discharge technology as a new method for killing Hepatitis C virus (HCV) cellsâ€? Hydrodynamic modelling of pollution with LNAPL gene... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25367
Environmental Engineering and Management Journal, Vol. 8 Nr. 2
Environmental Engineering and Management Journal › Vol. 8 › Nr. 2 Include urmatoarele articole:â€? Environmental Engineering and Management Journal, Vol. 8 Nr. 2â€? Bioengineering aspects of tissues culture bioreactors for medicine and environmental applicationsâ€? Removal of bis (1-chloro-2-propyl) ether from wastewater using sonodegradation and biodegradationâ€? A novel plasma reactor for toluene decomposition in contaminated air flowâ€? Study of the copper (II) removal from aqueous solutions by chelating resin Purolite S930 â€? Analysis of some metal levels... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25371
Environmental Engineering and Management Journal, Vol. 8 Nr. 4
Environmental Engineering and Management Journal › Vol. 8 › Nr. 4 â€? Photocatalytic properties of titania - fly ash thin filmsâ€? Study of the viscosity of some biodiesel – diesel oil blendsâ€? Aspects refering to technical and leaching properties of the secondary aluminium slags - cement compositesâ€? Studies regarding phenol and 4-chlorophenol sorption by surfactant modified zeolitesâ€? Cu-Ni nanostructured electrocatalysts obtained by electrocodepositionâ€? Molecularly imprinted poly (vinyl alcohol) films for the selective absorption of glycyrrhizinic ac... Autori: http://www.ecozone.ro/reviste.php?RID=25373
Environmental Engineering and Management Journal, Vol. 8 Nr. 5
Environmental Engineering and Management Journal › Vol. 8 › Nr. 5 â€? Photocatalytic properties of titania - fly ash thin filmsâ€? Study of the viscosity of some biodiesel – diesel oil blendsâ€? Aspects refering to technical and leaching properties of the secondary aluminium slags - cement compositesâ€? Studies regarding phenol and 4-chlorophenol sorption by surfactant modified zeolitesâ€? Cu-Ni nanostructured electrocatalysts obtained by electrocodepositionâ€? Molecularly imprinted poly (vinyl alcohol) films for the selective absorption of glycyrrhizinic ac... Autori: http://www.ecozone.ro/reviste.php?RID=25374
Environmental Engineering and Management Journal, Vol. 8 Nr. 6
Environmental Engineering and Management Journal › Vol. 8 › Nr. 6 â€? Physiological changes in seedling germination and growth plant under chemical stress conditionsâ€? Studies on sorption and transport processes of cadmium in soilsâ€? Assessment of the anthropogenic impact on water systems by fluorescence spectroscopyâ€? Research on the effects of soil improvement by fertilization on the quality of winter wheatâ€? Halotherapy: From ethnoscience to scientific explanationsâ€? Study regarding the sorption of erythrosine from aqueous solution onto soilâ€? Hydroxy... Autori: ISSN: 1582 - 9596 http://www.ecozone.ro/reviste.php?RID=25375
Adsorption of n-hexane vapors onto non-functionalised hypercrosslinked polymers (HYPERSOL-MACRONETTM) andactivated carbon: Thermodynamic and kinetic studies
Environmental Engineering and Management Journal › Vol. 8 › Nr. 2 AbstractThe adsorption characteristics of n-hexane vapors from gaseous stream onto two types of hypercrosslinked polymeric resins (MN 202 and MN 250), and a bituminous granular activated carbon (AC 20) was investigated. The n-hexane influent concentration ranged from 2100 to 4500 ppm and the adsorption processes were performed at 30, 40 and 50 ?C. Thermodynamic potentials ?H, ?S, and ?G and isosteric heats of adsorption were calculated from experiment performed at different temperatures (30-50?C... Autori: Adela Marilena Buburuzan, Cezar Catrinescu, Matei Macoveanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25393
Study of adsorption equilibrium of some wet aircomposite material systems
Environmental Engineering and Management Journal › Vol. 8 › Nr. 2 AbstractEquilibrium data of water vapor adsorption from wet air on several materials were experimentally determined at temperature values of 313 and 333 K and air relative humidity values ranged between 30 and 90 %. Experimental data were correlated with Langmuir and Freundlich models. The obtained results emphasize the significant difference between the water retained on the adsorbent materials impregnated with various salt solutions, and on classic adsorbents.... Autori: Ioan Mămăligă, Constantin Baciu, Stelian Petrescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25394
Sludge recycling in ceramic matrix
Environmental Engineering and Management Journal › Vol. 8 › Nr. 4 Abstract
In the new millennium to sustain a healthy life in harmony with nature, it will be extremely important to develop various materials and processes that minimize any harmful influence on the environment. The feasibility of sludge recycling in the brick manufacture was evaluated through laboratory testing. Several ceramic masses with clay, sand and various proportion of sludge have been synthesized and than characterized by their physical-mechanical properties. Sludge fineness also has ... Autori: Ana - Maria Szoke, Marcela Muntean ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25454
On the influence of ETS - 10 porosity and surface properties in retention of some nanoions and nanomolecules
Environmental Engineering and Management Journal › Vol. 8 › Nr. 4 Abstract
Mesoporosity of about 7 nm in ETS-10 titanosilicate was generated by postsynthesis treatment with hydrogen peroxide under microwave irradiation, resulting in an increased external surface area of the materials (55 m2/g). The influence of titanosilicate porosity and its surface modification by phosphorus atoms (ET(P)S-10) on the retention of some nanoions (??-emitting radioactive U(VI) and Th(IV) ions) and biomolecules (the proteins cytochrome c, papain, and ??-globulin) was investiga... Autori: Robert Gradinaru, Sorin O. Valu, Stefan Postolache, Claudiu C. Pavel, Ion Sandu, Karin Popa ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25455
Adsorption of Cu2+ on White Poplar and Oak Sawdust
Environmental Engineering and Management Journal › Vol. 8 › Nr. 4 Abstract
The studies of Cu (II) adsorption were conducted by testing various sawdust types. Two biomass, oak sawdust wood (Querqus robur) and white poplar sawdust wood (Populus alba), have been compared considering their efficiency for copper removal from diluted water solutions. Raw sawdust proved no efficiency in adsorption. Therefore, pre-treatment processes were developed and optimized, to enhance the sawdust affinity for heavy metals adsorption. The optimized pre-treatment conditions are... Autori: Dora Lucaci, Anca Duta ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25460
Enhanced heavy metal adsorption on dye-modified fly ash
Environmental Engineering and Management Journal › Vol. 8 › Nr. 4 Abstract
The use of fly ash (FA) in wastewater treatment received a lot of attention for the immobilization of heavy metal cations, mainly Cd2+, Pb2+, Ni2+, Zn2+, Cu2+. For an up-scalable wastewater treatment process, the substrate must have good adsorption efficiency and relatively constant behaviour. Modifying the fly ash surface can be a solution for reaching both goals. The use of FA for heavy metals removal, from wastewaters resulted in the dye finishing industry, faces a supplementary p... Autori: Maria Visa, Anca Duta ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25471
Immobilization mechanisms of chromium in cementbased solidified waste
Environmental Engineering and Management Journal › Vol. 8 › Nr. 4 Abstract
Knowledge of the binding mechanisms of heavy metals to cement minerals is essential for the prediction of the long-term leachability of cement-based solidified waste containing heavy metals. In this paper, the sorption of chromate ions onto calciumsilicate- hydrate (C-S-H) in equilibrated aqueous suspensions was investigated as a function of liquid-to-solid ratio. The hypothesis of super-equivalent adsorption was assumed to be involved in chromate ions immobilization. This hypothesis... Autori: Constantin Bobirica, Ionel Constantinescu, Liliana Bobirica, ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25478
Studies regarding phenol and 4-chlorophenol sorption by surfactant modified zeolites
Environmental Engineering and Management Journal › Vol. 8 › Nr. 4 Abstract
Phenols and chlorophenols are contaminants in soils, sediments, surface waters and groundwater, largely because of their worldwide utilization in the last 50 years as wood preservatives and general biocides in industry and agriculture. The toxicity of chlorophenols and their persistence in the environment require advanced treatment techniques for their removal.
This study presents the results of a comparative evaluation of the adsorption of phenol and 4-chlorophenol from aqueous sol... Autori: , Cezar Catrinescu, Roxana Elena Apreutesei ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25497
Photocatalytic properties of titania - fly ash thin films
Environmental Engineering and Management Journal › Vol. 8 › Nr. 4 Abstract
The paper presents the results obtained when using thin films (doctor blade) of titanium oxide powder (Degussa P25) and fly ashactivated with NaOH, for advanced treatment of complex waters resulted in the textile industry. There are studied the heavy metal(cadmium, copper) adsorption and the dyes (methyl orange and methylene blue) photo-degradation using these novel substrates.The thin films crystallinity (XRD), morphology and roughness (AFM) were evaluated and no significant changes... Autori: Anca Duta, Luminita Andronic, Maria Visa ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25500
Abiotic and biotic mitigation of volatile methyl siloxanes in anaerobic gas-phase biomatrices
Environmental Engineering and Management Journal › Vol. 8 › Nr. 5 Abstract
This paper presents preliminary results of a batch-scale study assessing the contribution of the multiple phenomena involved in siloxane removal in three-phase biomatrices. Batch scale experiments were undertaken in shaken flasks containing acclimatised culture medium, solid media and siloxane vapours (octamethylcylotetrasiloxane and decamethylcyclopentasiloxane, respectively) under anaerobic gas-phase conditions. Abiotic and biotic phenomena, considered to be possible siloxane remov... Autori: Gabriela Soreanu, Patricia Falletta, Michel Beland, Kara Edmonson, Peter Seto ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25510
Equilibrium and kinetic studies of copper (ii) removal on Purolite S930 resin
Environmental Engineering and Management Journal › Vol. 8 › Nr. 5 Abstract
The presence of heavy metals in the environment is a major concern due to their non-biodegradability, bioaccumulation tendency, persistence in nature and toxicity to many life forms. Different treatment techniques for wastewater laden with copper have been developed in recent years to decrease the amount of wastewater produced and to improve the quality of the treated effluent. All techniques have their advantages and limitations in application. One of the most used techniques to rem... Autori: Petru Bulai, Catalin Balan, Camelia Scripcariu, Matei Macoveanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25531
Using of industrial waste materials for textile wastewater treatment
Environmental Engineering and Management Journal › Vol. 8 › Nr. 5 Abstract
Sorption is one of the several methods that have been successfully utilized for dyes removal. A large number of materials have been used as suitable sorbents for decolourization of industrial effluents: activated carbon (the most common but expensive adsorbent), polymeric resins, various low-cost adsorbents (agricultural and industrial by-products, peat, chitin, silica, bentonite, other clays, fly ash).
Our paper is a review about our researches regarding different types of industri... Autori: Daniela Suteu, Carmen Zaharia, Augustin Muresan, Rodica Muresan, Alina Popescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25532
Adsorption characteristics of Co(II) ions from aqueous solutions on romanian peat moss
Environmental Engineering and Management Journal › Vol. 8 › Nr. 5 Abstract
Peat moss has been widely used as low-cost adsorbent to remove a variety of pollutants, including organic compounds and metal ions from aqueous effluents. Various functional groups allow such compounds to bind on active sites of peat moss. The adsorbent used in this study was Romanian peat moss sampled from Poiana Stampei (Romania). The adsorption of Co(II) ions from aqueous solutions on Romanian peat moss was studied in batch experiments, in order to establish the influence of initi... Autori: Corneliu Caramalau, Laura Bulgariu, Matei Macoveanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25533
Nitrogen adsorption of shale for use as media in constructed wetland
Environmental Engineering and Management Journal › Vol. 8 › Nr. 5 Abstract
The constructed wetlands are considered as a low-cost alternative system for nitrogen removal. Shale was selected as a media in constructed wetlands, on the basis of adsorption capacity and suitability for plant growth. The specific objective of this study was to evaluate nitrogen adsorption capacity for using as a media in constructed wetlands. Shale was sieved into 5 particle sizes Shale A-E. The physical and chemical characteristics of shale showed that it is suitable to be use as... Autori: Amara Daothaisong, Jareeya Yimrattanabovorn ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25535
Removal of 4-chlorophenol by surfactant modified zeolites and surfactant modified alkali-treated natural zeolites
Environmental Engineering and Management Journal › Vol. 8 › Nr. 5 Abstract
Chlorophenols are contaminants in soils, sediments, surface waters and groundwater, largely because of their worldwide utilization in the last 50 years as wood preservatives and general biocides in industry and agriculture. The toxicity of chlorophenols and their persistence in the environment require advanced treatment techniques for their removal.
Surfactant-modified natural zeolites (SMZs) represent an important class of sorbents for water treatment. This work presents a comparat... Autori: Roxana Elena Apreutesei, Cezar Catrinescu, Adrian Ungureanu, ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25537
Adsorption of humic acids and of some metal ions from aqueous solutions on activated carbons
Environmental Engineering and Management Journal › Vol. 8 › Nr. 5 Abstract
This paper is the investigation concerning the removal, from surface water, of humic acids and of some cations (Cu2+, Al3+) on activated carbons AG-3, BAU, CASO-16 from individual solutions as well as from their mixtures both in static and dynamic conditions. The conclusions of the paper are that, when humic acids are adsorbed from micellar solutions, semiassociates are formed on the surface of activated carbon BAU (in its porous structure), while humic acids adsorption on activated ... Autori: Tudor Lupascu, Mihail Ciobanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25539
SnO2-CeO2 oxidation catalysts
Environmental Engineering and Management Journal › Vol. 8 › Nr. 6 Abstract
The aim of this work was to obtain ceria-based catalysts with improved oxidation properties by adding tin dioxide (5, 10 and 20 wt %) and using the co-precipitation method of preparation. The samples were characterized by BET, ESEM, and DRIFT spectroscopy. The activity of SnO2-CeO2 catalytic systems in CO oxidation was studied between room temperature to 673 K. It was found that the increase of SnO2 content obviously increases the low temperature CO conversion. However, at 673 K all ... Autori: Tatiana Yuzhakova, , Monica Caldararu, Jozsef Kovacs, Anca Vasile, Georgeta Postole, Cristian Hornoiu, Endre Domokos ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25565
An investigation of the sorption of acid orange 7 from aqueous solution onto soil
Environmental Engineering and Management Journal › Vol. 8 › Nr. 6 Abstract
The goal of the study was to investigate the sorption behavior of Acid Orange 7 (C.I. 15510) onto soil collected from Iasi area (Romania). The sorption isotherm, kinetic and thermodynamic studies were performed by batch mode. The effects of experimental parameters such as contact time, pH value (2-12) and temperature (20 - 400C) have been studied. Also the influence of initial dye concentration (10 - 100 mg/L) and sorbent dosage (from 5 g L-1 to 150 g L-1) were studied. It was found ... Autori: Camelia Smaranda, Dumitru Bulgariu, Maria Gavrilescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25566
Arsenate removal by Withania frutescens plant from the south-western Morocco
Environmental Engineering and Management Journal › Vol. 8 › Nr. 6 Abstract
Withania frutescens plant from the south-western Morocco was used as an environmentally friendly material for the removal of As(V) ions from aqueous solutions. This work presents the characteristics of the adsorption and the desorption processes of As(V) using the dried W. frutescens plant as an environmentally friendly adsorbent. The mass of the adsorbent, the As(V) concentration, the contact time and the pH of the tested aqueous solutions were used as controlled variable parameters... Autori: Mohamed Chiban, Gabriela Lehutu, Fouad Sinan, Gabriela Carja ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25568
Kinetic study of cobalt(Ii) adsorption on peat activated by simple chemical treatments
Environmental Engineering and Management Journal › Vol. 8 › Nr. 6 Abstract
In this study the adsorption of cobalt(II) from aqueous solutions on peat (from Poiana Stampei, Romania) activated by simple chemical treatments, was investigated from kinetic point of view. The chemical treatments suppose the mixing of peat with aqueous solutions of common chemical reagents (H2SO4, NaCl and NaOH), without the addition of supplementary additives. An increase of adsorption capacity of peat was obtained in case of treatments with NaCl and NaOH respectively, and this is... Autori: Corneliu Caramalau, Laura Bulgariu, Matei Macoveanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25571
Study regarding the sorption of erythrosine from aqueous solution onto soil
Environmental Engineering and Management Journal › Vol. 8 › Nr. 6 Abstract
In this paper, the capacity of a soil to retain the dye Erythrosine B from aqueous solution by sorption has been studied. Batch adsorption experiments were conducted to investigate the sorption of the dye from aqueous solutions onto soil with particles of different size. Different models were used to describe the kinetic data, to calculate the corresponding rate constants and to predict the theoretical capacities of soil for dye sorption.
... Autori: Florentina Anca Căliman, Laura Carmen Apostol, Dumitru Bulgariu, Laura Bulgariu, Maria Gavrilescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25573
Studies on sorption and transport processes of cadmium in soils
Environmental Engineering and Management Journal › Vol. 8 › Nr. 6 Abstract
Heavy metals produced and released by anthropogenic activities generate serious environmental problems. Ions of toxic metals can bind to the mineral surface in a number of ways, including absorption, adsorption, precipitation, ion exchange.
The paper shows that the fate and migration of heavy metals in soils strongly depend on the physical properties and chemical and mineralogical composition of such environments. Cadmium is one of the most toxic metals with carcinogenic and teratog... Autori: Vasile Lucian Pavel, Dumitru Bulgariu, Laura Bulgariu, Raluca Maria Hlihor, Maria Gavrilescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25577
Comparative study of the adsorption-desorption cycles of hexane over hypercrosslinked polymeric adsorbents and activated carbon
Environmental Engineering and Management Journal › Vol. 9 › Nr. 1 Abstract
In this work, the behavior of n-hexane vapors in the adsorption-desorption cycles of non-functionalized polymeric adsorbents (MN 202 and MN 250) and granular activated carbon (AC 20) was studied. The adsorption experiments were performed in a fixed bed column, under dynamic conditions, at 30?C and atmospheric pressure. The inlet concentration of n-hexane in the air streams was 0.115 mg/cm3 (32500 ppm) and the space velocity was 2.75 s-1. Also, desorption experiments were performed in... Autori: Adela Marilena Buburuzan, Cezar Catrinescu, Matei Macoveanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25584
Chelating sorbent containing two types of functional groups hydroxamic acid and amidoxime for lead (II) ions effluent management
Environmental Engineering and Management Journal › Vol. 9 › Nr. 1 Abstract
The removal efficiency of Pb(II) from aqueous solutions by sorption on a bifunctional acrylic ion exchange resin with groups of hydroxamic acid and amidoxime is presented. It was found that Pb(II) sorption potential varies as function of solution pH, initial metal concentration, contact time and temperature. From aqueous solutions with Pb(II) initial concentration of 82.96 ?ŽÂ?g/mL the sorption percentage is 98.64%. The Langmuir and Freundlich isotherms were used to model the Pb(II) ... Autori: Anca Ceica, Carmen Paduraru, Igor Creţescu, Lavinia Tofan, Violeta Neagu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25586
Analysis of factors determining the behaviour of chromium in some romanian soils
Environmental Engineering and Management Journal › Vol. 9 › Nr. 1 Abstract
Chromium (Cr) is one of the most common metal contaminants in soil because of its use in ore refining, production of steel and alloys, metal plating, tanneries, wood preservation, and pigmentation. In soil environment, the most stable oxidation states of chromium are Cr (III) and Cr (VI). While Cr (III) is considered an essential trace element for the functioning of living organisms, Cr (VI) is toxic and carcinogenic to humans via inhalation for long exposures, since it is easily sol... Autori: Dumitru Bulgariu, Laura Bulgariu, Maria Gavrilescu, Raluca Maria Hlihor, Vasile Lucian Pavel ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25590
Biosorption of malachite green from aqueous solutions onto biomaterials
Environmental Engineering and Management Journal › Vol. 9 › Nr. 1 Abstract
The use of biomaterials as biosorbents for treatment of wastewaters will provide as a potential alternate to the conventional treatment methods. The main advantages of biosorption are high selectivity , cost effectiveness and good removal performance. World wide numerous low cost bio materials have tried for biosorption of dyes. In this present investigation, the dead biomass of Penicillium sp. fungus and wood sawdust was used as biosorbents and their capacity to removed malachite gr... Autori: Cornel Pohontu, Florin Luca, Igor Creţescu, Manea Liliana, Mariana Diaconu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25593
Equilibrium and kinetic studies of acid dye sorption onto soils from Iasi area
Environmental Engineering and Management Journal › Vol. 9 › Nr. 1 Abstract
The aim of this study was to investigate the Congo Red (CR) sorption behavior onto six soils from Ia?…?¸i area, with different characteristics. The rate of sorption of Congo red dye molecules from aqueous solution by soil was studied in batch conditions. The rate of sorption was very rapid in the first 5-10 minutes and reached a maximum in 20 minutes. Kinetic modeling analysis of the pseudo-first-order, pseudo-second-order, intraparticle diffusion and Elovich equations reveals that t... Autori: Camelia Smaranda, Dumitru Bulgariu, Maria Gavrilescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25594
Study on removal of cadmium from aqueous solutions by adsorption on bael tree leaf powder
Environmental Engineering and Management Journal › Vol. 9 › Nr. 3 Abstract
The adsorption behavior of bael tree (BT) leaf powder for cadmium ions from aqueous solutions has been investigated as a function of appropriate equilibrium time, adsorbent dose, adsorbate concentrations and pH using a batch system. Studies showed that the pH of aqueous solutions affected cadmium removal as a result of the fact that removal efficiency increased with increasing solution pH. The maximum adsorption was 93.56% at solution pH equal to 6.0, contact time of 30 min and initi... Autori: Ponnusamy Senthilkumar, Rangasamy Gayathri ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25621
Equilibrium and kinetic modeling of Zn (II) sorption from aqueous solutions by sphagnum moss peat
Environmental Engineering and Management Journal › Vol. 9 › Nr. 3 Abstract
Equilibrium and kinetics of sorption of Zn (II) ions from aqueous solutions of pH 5 on indigene (Romanian) peat moss were investigated in batch system. The experimental equilibrium sorption data at three temperatures were analysed by Freundlich, Langmuir, Tempkin and Dubinin-Radushkevich sorption isotherm models. Results indicate the following order in to fit the isotherm equations: Langmuir > Tempkin > Dubinin-Radushkevich > Freundlich. The equilibrium sorption capacity determine... Autori: Angelica Kicsi, Doina Bilba, Matei Macoveanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25632
Studies on the biosorption of Terasil dye by Aspergillus Niger dead biomass
Environmental Engineering and Management Journal › Vol. 9 › Nr. 3 Abstract
Textile dyeing process is an important source of contamination responsable for the continous pollution of the environment. Control of water pollution has importance for both organisms, which live in water and those who benefit from water. Many dyes reaching the water source are difficult to decompose and cause many problems due to their carcinogenicity. Consequently, it is important to remove these pollutants from wastewater before their final disposal. This paper reports the resuls ... Autori: Alina Dughila, Alina Stefanache, Cornel Pohontu, Igor Creţescu, Mariana Diaconu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25633
Environmental Engineering and Management Journal, Vol. 9 Nr. 5
Environmental Engineering and Management Journal › Vol. 9 › Nr. 5 ? SUSTAINABLE CONCRETE HARDENING PROCESSES IN NORMAL CLIMATIC AND THERMAL TREATMENT CONDITIONS
? THE ENVIRONMENTAL DIMENSION ? AN INTERDISCIPLINARY RESEARCH AREA
? MENU PLANNING STRATEGY BASED ON ECOLOGICAL FOOTPRINT
? EVALUATING ENVIRONMENTAL IMPACT OF NIGERIAN COMPOSTED WASTES USING LABORATORY EXTRACTION TEST
? IN SITU RADIOFREQUENCY FIELD LEVEL ASSESSMENT IN TWO URBAN AREAS IN ROMANIA: OPEN QUESTIONS TO ELECTROMAGNETIC POLLUTION
? INNOVATIVE SOLUTION FOR WARNING ON HI... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25657
Environmental Engineering and Management Journal, Vol. 9 Nr. 7
Environmental Engineering and Management Journal › Vol. 9 › Nr. 7 ? MUNICIPAL SOLID WASTE LANDFILLING AND TREATMENT OF RESULTING LIQUID EFFLUENTS
? ROMANIA: ENTREPRENEURIAL VALUES AND SUSTAINABILITY
? THE COMPRESSIVE STRENGTH OF WOODEN BRIQUETTES USED AS RENEWABLE FUEL
? ECO-FRIENDLY EXTRACTION AND SEPARATION METHODS OF CAPSAICINES
? ADDRESSING ISSUES OF GEOENVIRONMENTAL RISKS IN DOBRUJA, ROMANIA/BULGARIA
? ADSORPTION OF 2,4-DINITROPHENOL AND 2,6-DINITROPHENOL ONTO ORGANOCLAYS AND INORGANIC-ORGANIC PILLARED CLAYS
? APPLICATION
O... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25659
Environmental Engineering and Management Journal, Vol. 10 Nr. 2
Environmental Engineering and Management Journal › Vol. 10 › Nr. 2 ? Environmental Engineering and Management Journal, Vol. 9 Nr. 4
? THE PROTECTION OF EQUIPMENTS USING VOLATILE INHIBITORS
? CONTINUOUS SURFACE TEMPERATURE MONITORING TO ESTIMATE SENSIBLE HEAT LOSS BY BUILDING FINISHES
? RECYCLE OF POLYAMIDE DYEING WASTEWATER FOLLOWING DECOLORIZATION WITH POLYMERIC SORBENTS
? PERFORMANCE EVALUATION OF AMINO ACID SALT-BASED COMPLEX ABSORBENTS FOR CO2 CAPTURE
? ADSORPTION EQUILIBRIUM STUDIES ON COPPER (II) IONS REMOVAL BY NATURAL WASTE USIN... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25666
Environmental Engineering and Management Journal, Vol. 10 Nr. 3
Environmental Engineering and Management Journal › Vol. 10 › Nr. 3 ? ADSORPTION OF DYE FROM AQUEOUS SOLUTION USING SILVER WOOD SAWDUST CARBON
? TIME SERIES ANALYSIS OF THE HEAVY METALS LOADED WASTEWATERS RESULTED FROM CHROMIUM ELECTROPLATING PROCESS
? WATER QUALITY CHARACTERIZATION OF THE PRUT RIVER
? ETHICAL AND SUSTAINABLE EDUCATION OF ENVIRONMENTAL ENGINEERS - BETWEEN REALITY AND HOPE
? INTERACTIONS AMONG CLIMATE, VEGETATION AND SOILS IN RADUCANENI ? IASI AREA
? DISTRIBUTION OF MIXING INTENSITY OF OXYGEN-VECTOR DISPERSIONS IN AERATED... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25669
BIOSORPTION OF LEAD FROM AQUEOUS SOLUTION BY USING CHEMICALLY TREATED Saccharomyces cerevisiae
Environmental Engineering and Management Journal › Vol. 10 › Nr. 6 Biosorption of lead (II) onto the biosorbent, represented by untreated S. cerevisiae and NaOH-treated S. cerevisiae was examined and the effects of contact time were investigated. The lead (II) biosorption was fast and equilibrium was attained within 90 mins. The maximum removal ratios of lead (II) for untreated S. cerevisiae and NaOH-treated S. cerevisiae after 3 h were 48.6% and 92.5%, respectively, with initial lead (II) concentration of 40 mg/L and optimum pH of 5.0. Data obtained from batch... Autori: Ying Zhang, Yingjie Dai, Baiyin Liu, Fang Ma, Ru Zheng, Limin Donghttp://www.ecozone.ro/reviste.php?RID=25670
NUMERICAL SIMULATION OF HEAT TRANSFER IN DIRECTIONAL SOLIDIFICATION PROCESS FOR POLYCRYSTALLINE SILICON
Environmental Engineering and Management Journal › Vol. 10 › Nr. 6 Temperature distribution in the vacuum directional solidification system influenced seriously on the impurities concentration andmicrostructure in Polycrystalline Silicon. In this study, a numerical model for the transient global heat transfer for directionsolidification process has been developed by the finite element method (FEM). A two-dimension numerical simulation fortemperature distribution of directional solidification process was carried out using software Multi-physics Comsol 3.5a. Ther... Autori: Guoqiang Lv, Wenhui Ma, Hua Wang, Xiangyang Mei, Kuixian Weihttp://www.ecozone.ro/reviste.php?RID=25671
ADSORPTION OF Cr(VI) ON Fe-Ni MODIFIED BENTONITES
Environmental Engineering and Management Journal › Vol. 10 › Nr. 7 A series of sodium bentonites as raw material were prepared to the modified inorganic iron-nickel montmorillonites and organic composite montmorillonites. The structural characterization and morphology of the iron-nickel crosslinked modified bentonites were observed by means of IR spectroscopy, X-ray diffraction, scanning electron microscopy. The effects of the amount of bentonites, adsorption time and pH change on the adsorption of Cr(VI) have also been studied. The results indicated that the a... Autori: Shao Hong, Cao Ninghttp://www.ecozone.ro/reviste.php?RID=25695
PREDICTION OF TiO2 AND WO3 NANOPOWDERS SURFACE CHARGE BY THE EVALUATION OF POINT OF ZERO CHARGE (PZC)
Environmental Engineering and Management Journal › Vol. 10 › Nr. 8 Abstract:Point of zero charge (PZC) is defined as the condition at which the surface charge density of a material equals to zero and, formost of the solids it is strongly pH dependent. The PZC can be controlled by tuning the solid surface properties (crystallinestructure, morphology) and by a proper environment control, thus it is important to evaluate the PZC for a certain type of material,in given working conditions, for enhancing the efficiency in the targeted application (e.g. layer by layer... Autori: Laura Maria Bertus, Radu Adrian Carcel ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25721
REMOVAL OF METHYL ORANGE AND METHYLENE BLUE DYES FROM WASTEWATER USING SAWDUST AND SAWDUST-FLY ASH AS SORBENTS
Environmental Engineering and Management Journal › Vol. 10 › Nr. 9 Abstract:Methyl orange and methylen blue are two dyes resulted from the textile industry. They are not raising just esthetical problems, butthey are toxic and hence harmful to aquatic animals. The aim of this study is to test the capacity of three types of sawdust (oak,willow and white poplar) and mixed substrates, sawdust: fly ash (FA), to remove the methyl orange (MO) and methylen blue(MB) from wastewater. The influence of contact time, solution pH and initial concentration of dyes on the blea... Autori: Anca Duta, Dora Lucaci ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25752
CORROSION INHIBITION IN SALINE ENVIRONMENT USING KETONIC MANNICH BASE FROM ortho-HYDROXYACETOPHENONE
Environmental Engineering and Management Journal › Vol. 10 › Nr. 9 Abstract:The paper presents the results obtained when using one ketonic Mannich base BM (1-(2’-hydroxyphenyl)-3-(1-piperidinylamino)propan-1-one hydrochloride) as corrosion inhibitor in saline environment, for different types of carbon steels,with various alloying elements. The Mannich base was synthesized and used in corrosion experiments, in concentrations varyingfrom 0….1300 ppm. The corrosion experiments were performed by potentiodynamic polarization studies, with 50 mVs-1 scanrate. The ... Autori: Andreea Milea, Cristina Bogatu, Ileana Manciulea ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25754
COMPARATIVE HEAVY METALS AND DYES REMOVAL EFFICIENCY ON FLY ASH AND WOOD ASH
Environmental Engineering and Management Journal › Vol. 10 › Nr. 9 Abstract:Ash is a waste that can be an efficient substrate in wastewater treatment for the immobilization of heavy metals and for dyesremoval. For an up-scalable wastewater treatment process, efficient substrates, with relatively constant behavior are needed andmodifying the adsorbent surface can be a feasible solution. Fly ash, resulted from coal burning, and wood ash are mixtures mainlycontaining metal oxides and carbon in various proportion, depending on the initial raw material.The paper pre... Autori: Maria Visa, Mihaela Nacu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25771
STUDIES ON ADSORPTION AND BIODEGRADATION OF CHROMIUMCONTAINING WASTEWATER BY LABORATORY-SCALE SEQUENCING BATCH REACTOR-POWDERED ACTIVATED CARBON SYSTEM
Environmental Engineering and Management Journal › Vol. 10 › Nr. 10 Abstract:The study involved investigating the effects of Cr(III) and the efficacy of powdered activated carbon (PAC) in reducing theinhibitory effects of Cr(III) on activated sludge under sequencing batch reactor (SBR) operation. The addition of Cr(III) into SBRsystem caused significant inhibitory effects on the activity of activated sludge as indicated by drastic drop in specific oxygenuptake rate (SOUR). The increase of Cr(III) concentration from 5 to 10 mg/L further deteriorated the treatment... Autori: Eiichi Toorisaka, Makoto Hirata, Soon-An Ong, Tadashi Hano ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25773
ADSORPTION OF Pb (II) FROM AQUEOUS SOLUTION ONTO LEWATIT FO36 NANO RESIN: EQUILIBRIUM AND KINETIC STUDIES
Environmental Engineering and Management Journal › Vol. 10 › Nr. 10 Abstract:This investigation focused on the adsorption of Pb (II) onto Lewatit FO 36 resin from aqueous solutions. The effects of initialmetal concentration, contact time, pH of solution were factors that affected the adsorption of Pb (II). Adsorption kinetic was betterexplained by the pseudo second order type 1 kinetic model that was confirmed by the values (R2>0.986). The Langmuir,Freundlich, Temkin and BET adsorption models were used for the equilibrium studies and Freundlich isotherm bette... Autori: Alireza Asgari, Azra Setodeh, Mehdi Ahmadi, Mohamad Sedigh Mortazavi, Pari Teymouri ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25791
USE OF D2EHPA-IMPREGNATED XAD7 RESIN FOR THE REMOVAL OF Cd(II) AND Zn(II) FROM AQUEOUS SOLUTIONS
Environmental Engineering and Management Journal › Vol. 10 › Nr. 10 Abstract:The adsorption performance of a novel support for metal ions sorption and their removal from aqueous solutions was examined.The support is a new solvent-impregnated resin (SIR) which can be considered as an alternative adsorbent material capable ofselective sorption. The adsorbent was prepared by impregnating di-(2-ethylhexyl)-phosphoric acid (D2EHPA) onto AmberliteXAD7 resin beads, by dry impregnation method. The interaction between XAD7 resin and D2EHPA was evaluated by FTIRspectrosco... Autori: Adina Negrea, Adriana Popa, Cornelia Muntean, Corneliu Davidescu, Lavinia Lupa, Mihaela Ciopec, Petru Negrea ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25793
REMOVAL OF Cd (II) FROM AQUEOUS SOLUTION BY ADSORPTION ONTO COIR PITH, AN AGRICULTURAL SOLID WASTE: BATCH EXPERIMENTAL STUDY
Environmental Engineering and Management Journal › Vol. 10 › Nr. 11 Abstract:Coconut coir pith, an agricultural solid waste was used for the sorption of Cd (II) from aqueous solution in batch mode. Parameters like contact time, adsorbent dosage and pH effect were studied. Langmuir and Freundlich isotherms were used to model the adsorption equilibrium data and the system followed both the isotherms. Cd (II) adsorption capacity of coir pith was found to be 18.72 mg/g. Kinetic parameters of adsorption such as the Langergren pseudo-first-order, pseudo second order r... Autori: Nagendra Badabhagni, Puthiya Veetil Nidheesh, Rajan Gandhimathi, Srikrishnaperumal Thanga Ramesh ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25800
CHARACTERIZATION AND TESTING OF THE MAGHEMITE NANOPARTICLES USED FOR REMOVAL OF HEXAVALENT CHROMIUM FROM AQUEOUS SYNTHETIC SOLUTIONS
Environmental Engineering and Management Journal › Vol. 10 › Nr. 11 Abstract:The paper refers at adsorption studies using the maghemite nanoparticles as adsorbent for removal of the hexavalent chromium from aqueous synthetic solutions. Adsorption reached at equilibrium within 10 minutes and was registered as maximum at pH 2.54. The adsorption data were analyzed and fitted by Langmuir isotherm. Investigation methods for characterization of the nanoparticles were X-ray diffraction, scanning and transmission electron microscopy. Also, in order to evaluate the hexav... Autori: Andra Mihaela Predescu, Andrei Predescu, , Eugeniu Vasile ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25805
IMMOBILIZATION OF CONIDIOBOLUS CORONATUS ALKALINE PROTEASE ON WASTE FUNGAL BIOMASS
Environmental Engineering and Management Journal › Vol. 10 › Nr. 11 Abstract:Alkaline protease from Conidiobolus coronatus which is optimally active at pH 10 and 40°C finds application in leather and detergent industries as well as for recovery of silver from waste photographic films. The protease was immobilized in Ca-alginate, polyacrylamide gel and alkali treated waste fungal biomass (ATWFB). ATWFB was found to be most suitable among the matrices tested. Glutaraldehyde marginally increased the binding to ATWFB. Binding of protease to ATWFB seems to be through... Autori: Ryali Seeta Laxman, Shiv Shankar ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25807
KINETICS AND EQUILIBRIUM STUDIES OF REACTIVE YELLOW 125 ADSORPTION ON A NITROGEN DOPED TiO2 MODIFIED ZEOLITE
Environmental Engineering and Management Journal › Vol. 10 › Nr. 11 Abstract:In this study, the adsorption mechanism of a reactive azo dye, Reactive Yellow 125 (RY 125), onto a nitrogen doped TiO2 modified zeolite (Z-TiO2-N) has been examined in order to identify the affinity of the material for the investigated pollutant envisaging its degradation by heterogeneous photocatalysis. Equilibrium experiments were performed and the data obtained were fitted with different isotherm equations, i.e., Langmuir, Freundlich, and Dubinin-Radushkevich (D-R). The Freundlich i... Autori: Cornelia Ratiu, Elida Cristina Ilinoiu, Florica Manea, Laura Cocheci, Liliana Andreea Colar, Rodica Pode ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25809
LEAD (II) BIOSORPTION BY A METAL TOLERANT STREPTOMYCES STRAIN
Environmental Engineering and Management Journal › Vol. 10 › Nr. 11 Abstract:The aim of the present study is the optimization of biosorption conditions using a metal tolerant actinomycete (strain 723) for the removal of lead ions from waste water in batch and dynamic flow mode. The optimum conditions for lead biosorption by the strain were determined as initial pH 3.0, biomass amount 2.0 g L-1, and initial metal concentration 400 mg L-1 in the batch condition. The maximum lead biosorption performance was obtained with a 19 mm diameter column, a 1 mL min-1 flow r... Autori: Ayşe Betül Karaduman, Maria Julia Amoroso, Mustafa Yamaç, Sergio Antonio Cuozzo, Zerrin Pat ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25811
PHOSPHATE REMOVAL FROM WATER AND RECOVERY USING IRON (Fe+3)OXIDE/HYDROXIDE NANOPARTICLES-BASED AGGLOMERATES SUSPENSION (AggFe) AS ADSORBENT
Environmental Engineering and Management Journal › Vol. 10 › Nr. 12 An iron(Fe+3) oxide/hydroxide nanoparticles-based agglomerates (AggFe) suspension adsorbent was synthesized for efficient, cost-effective phosphate removal. A strong effect of AggFe concentration and pH level of water containing phosphate on removal efficiency was shown. It was found that phosphate adsorption onto the AggFe suspension may be described by pseudo-secondorder reaction kinetics and the Langmuir isotherm model. The unique adsorption properties of synthesized AggFe adsorbent are demon... Autori: Grigori Zelmanov, Raphael Semiat ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25829
REMOVAL OF Cr(VI) FROM AQUEOUS ENVIRONMENT USING PEAT MOSS: EQUILIBRIUM STUDY
Environmental Engineering and Management Journal › Vol. 11 › Nr. 1 The removal of Cr (VI) from aqueous solutions by sphagnum peat moss was investigated in batch experiments as a function of solution pH and initial Cr (VI) concentration. The highest removal percentage (R=99%) was obtained at pH = 1, in solutions of 20.8 mg Cr (VI)/L. In order to establish the mechanism of the removal process, Cr (VI) and total Cr (Cr (VI) + Cr (III)) in residual solutions was analyzed. The Cr (VI) removal by the peat moss at low pH is governed by two processes – electrostatic ... Autori: Catalin Balan, Doina Bilba, Irina Volf, Matei Macoveanu, Petru Bulai ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25849
EQUILIBRIUM AND KINETICS STUDY OF NITRATE REMOVAL FROM WATER BY PUROLITE A520-E RESIN
Environmental Engineering and Management Journal › Vol. 11 › Nr. 1 Equilibrium and kinetics of nitrate removal from aqueous solutions of pH = 6.8 were investigated using the strong base anion exchange resin (Purolite A-520E) in the batch method. The experimental equilibrium data were analyzed by means of the Langmuir, Freundlich and Dubinin-Radushkevich sorption isotherm models. The Langmuir model describes sorption isotherm of nitrates with high correlation coefficients and better than Dubinin-Radushkevich and Freundlich models. The effect of temperature on th... Autori: Anca Ceica, Igor Creţescu, Ion Balasanian, Laura Bulgariu, Liliana Lazăr ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25851
IN SITU STUDY OF THE ELECTRICAL/DIELECTRIC PROPERTIES OF ALUMINA SUPPORTED VANADIA USED AS COMBUSTION CATALYSTS
Environmental Engineering and Management Journal › Vol. 11 › Nr. 1 The synthesis of vanadium oxide systems (with 5 and 20 wt% V2O5 loadings) supported on commercial γ-alumina was carried out by a wet impregnation method. The samples were characterized by low-temperature nitrogen adsorption (BET), inductively coupled plasma (ICP) method and by in situ electrical conductance/capacitance measurements. The adsorption of CO was used to investigate the acidic properties of alumina support and V2O5/-Al2O3 catalysts by FTIR spectroscopy. The catalytic acti... Autori: , Cristian Hornoiu, Mariana Scurtu, Monica Caldararu, Niculae I. Ionescu, Tatiana Yuzhakova, Veronica Bratan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25869
REMOVAL OF Cd(II) IONS FROM AQUEOUS SOLUTION BY RETENTION ON PINE BARK
Environmental Engineering and Management Journal › Vol. 11 › Nr. 1 Among the different types of waste products tested, the bark of different Pinus species have been identified as a promising class of low- cost sorbents for heavy metal binding. In this context, the potential of Romanian pine bark wastes as green and economical sorbent for cadmium (II) ions removal from aqueous solutions has been tested in batch conditions as function of initial pH, contact time, sorbent dose, metal ion concentration and temperature. The equilibrium data at three different temper... Autori: Anca Miron, Brindusa Robu, Carmen Paduraru, Lavinia Tofan, Roxana Laura Mihailescu Amalinei ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25871
THERMAL STABILITY AND SURFACE STRUCTURE OF SnO2-CeO2 IMPREGNATED CATALYSTS
Environmental Engineering and Management Journal › Vol. 11 › Nr. 1 Newly prepared SnO2-CeO2 catalyst samples used as depollution catalysts were characterized applying low-temperature nitrogen adsorption (BET), X-ray diffraction (XRD), thermo-gravimetry (TG-dTG) and temperature-programmed reduction (TPR) methods. Pure SnO2 has higher surface area (17 m2/g) than the pure CeO2 (8 m2/g). Addition of organic tin oxide precursor to ceria in amount of 5 wt% slightly decreases the surface area of CeO2 (SSn5-Ce= 7 m2/g). The increase of tin oxide content to 10 and 20 wt... Autori: , Anca Vasile, , Cristian Hornoiu, Jozsef Kovacs, Tatiana Yuzhakova, Veronica Bratan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25875
EFFECTS OF Fe(III) ON DISSIMILATORY FERRIC REDUCTION, NITROGEN AND PHOSPHORUS REMOVAL IN ACTIVATED SLUDGE PROCESS
Environmental Engineering and Management Journal › Vol. 12 › Nr. 7 Abstract An activated sludge from SBBR (sequencing biofilm batch reactor) reactor filled with Fe0 as filler had been acclimated to Fe(III)rich environment aiming at secure an enrichment culture of iron-reducing bacteria. The dissimilatory Fe(III) reduction ability and its efficiency on the effect of nitrogen and phosphorous removal by dosing different Fe(III) under anaerobic condition were investigated. The mechanism was also proposed based on the results derived from the experiment a... Autori: Jie Li, Juanjuan Feng, Siyuan Zhai, Ya’e Wang ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25943
ADSORPTION OF HEXACHLOROCYCLOHEXANE BY RAW AND SURFACTANT MODIFIED MEERSCHAUM
Environmental Engineering and Management Journal › Vol. 12 › Nr. 7 AbstractThe adsorption of hexachlorocyclohexane (HCH) by modified meerschaum was studied. The comparison of the meerschaummodified by anion and cation surfactant was conducted to explore their effect on HCH adsorption. The results showed that theabsorbability of HCH by the CTMAB-M (cetyltrimethylammonium bromide-modified) is better than that of SAS-M (sodiumdodecyl sulphonate-modified) because the CTMAB-M has fluffier fibers structure. The addition of amount of adsorbents shouldimprove the adsor... Autori: Chanjuan Gao, Shengke Yang, Wenke Wang, Yaqian Zhao, Yue Zhao ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25948
ADSORPTION OF PHOSPHATE FROM AQUEOUS SOLUTIONS BY THERMALLY MODIFIED PALYGORSKITE
Environmental Engineering and Management Journal › Vol. 12 › Nr. 7 AbstractIn this study, palygorskite clay calcinated at different temperatures from 200 to 900 °C was used as adsorbent to removephosphate from aqueous solutions. The crystal structure and the surface property of the thermally modified material wasinvestigated to determinate the relationship between the adsorption capacity of the adsorbent and the changes of the crystalstructure and surface property. The results indicate that palygorskite clay calcinated at 700 °C had the highest adsorptioncapaci... Autori: Chengsong Qing, Chengzhu Zhu, Dong Chen, Jiayuan Wang, Jingjing Xie, Tianhuhu Chen, Xinmin Zhan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25949
CO2 CAPTURE BY BIOMIMETIC ADSORPTION: ENZYME MEDIATED CO2 ABSORPTION FOR POST-COMBUSTION CARBON SEQUESTRATION AND STORAGE PROCESS
Environmental Engineering and Management Journal › Vol. 12 › Nr. 8 AbstractThe huge emission of greenhouse gases from fossil-fuelled power plants is emphasizing the need for efficient Carbon Captureand Storage (CCS) technologies. The biomimetic CO2 absorption in aqueous solutions has been recently investigated as apromising innovative alternative for post-combustion CCS. The carbonic anhydrase (CA) - a broad group of ubiquitous enzymes– may catalyse the CO2 hydration reaction and then to promote CO2 absorption rate into aqueous solutions. Nevertheless theresear... Autori: Antonio Marzocchella, Giuseppe Olivieri, Maria Elena Russo, Piero Salatino ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25976
MUNICIPAL SOLID WASTE MANAGEMENT AND TREATMENT OF EFFLUENTS RESULTING FROM THEIR LANDFILLING
Environmental Engineering and Management Journal › Vol. 12 › Nr. 8 AbstractEU policy on waste management stresses the importance of an integrated approach to waste management, which includesconstruction of waste disposal facilities with prevention of waste generation and recycling, in line with management hierarchy:prevention of waste and its negative impacts; recovery of waste through recycling, reuse, safe final disposal of waste where thereis no possibility of recovery.This paper address the issue of municipal waste management and the impacts generated into ... Autori: Ana-Maria Şchiopu, Cristina Ghinea ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25987
COMBINED CATALYTIC OXIDATION AND ADSORPTION OF PRIORITY ORGANIC POLLUTANTS FOR WASTEWATER RECYCLING
Environmental Engineering and Management Journal › Vol. 12 › Nr. 5 AbstractThe increased concentrations of priority pollutants in wastewaters have imposed the completion of conventional treatment withadvanced treatment stages (such as catalytic oxidation, membrane processes, adsorption, ion exchange, etc.) for their removal bychemical degradation and/or physical separation.In this study, 4-chlorophenol (4-CP) is proposed as model-pollutant for the priority organic pollutants present in syntheticwastewaters and several processes which can act as advanced treatme... Autori: Carmen Teodosiu, Corina Petronela Musteret, Daniela Arsene, Daniela Cailean, George Bârjoveanu, Petru Apopei, Roxana Elena Apreutesei ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26022
COMPOSITE MATERIAL BASED ON SILVER-DOPED ZEOLITE AND MULTI-WALL CARBON NANOTUBES FOR HUMIC ACID REMOVAL
Environmental Engineering and Management Journal › Vol. 12 › Nr. 5 AbstractIn this paper the synthesis, characterization and testing of composite material based on multi-wall carbon nanotubes and silverdopednatural zeolite (MWCNT-ZAg) has been investigated for humic acid (HA) adsorption. The surface characterization of thecomposite material has been investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM/ EDX) analysis.The Langmuir and Dubinin-Radushkevich (D-R) models fitted the best experimental data informing that adsorption process ofH... Autori: Aniela Pop, Corina Orha, Florica Manea, Virgil Tiponut ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26023
REMOVAL OF TWO INDUSTRIAL DYES FROM AQUEOUS SOLUTIONS USING HYDROTALCITE-LIKE ANIONIC CLAYS AND THEIR DERIVED MIXED OXIDES AS HIGHLY EFFICIENT PHOTOCATALYSTS
Environmental Engineering and Management Journal › Vol. 12 › Nr. 5 AbstractMultifunctional materials based on iron substituted anionic clays and their derived mixed oxides owning specific porousproperties and textural characteristics are synthesized, characterized and tested as photocatalysts in the process of the azo-dyesdegradation from aqueous solutions. The features of X-ray diffraction patterns point out the modification of the lattice parameterswhen Fe3+ is substituted Al3+ in the brucite like layer. N2 adsorption-desorption analysis reveals specific poro... Autori: Carmen Gherasim, Gabriela Carjă, Magda Puşcaşu, Mihaela Bîrsanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26024
COPPER IMPREGNATED ACTIVATED CARBON FOR THE TREATMENT OF SULPFUROUS WATERS
Environmental Engineering and Management Journal › Vol. 12 › Nr. 5 AbstractThis paper deals with the experimental investigation related to removal of hydrogen sulfide from simulated groundwater byadsorption/oxidation on activated carbons. Carbonaceous adsorbents were synthesized from peach stones by physical-chemicalactivation method and modified by oxidation following impregnation with Cu2+ by ion-exchange method. Obtained carbonaceousadsorbents were characterized by specific surface area and micropore volume. Surface chemistry properties were evaluated usingB... Autori: , , Vasile Rusu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26026
SYNTHESIS OF NANOCRYSTALLINE ZnFe2O4 AND ITS USE FOR THE REMOVAL OF CONGO RED FROM AQUEOUS SOLUTIONS
Environmental Engineering and Management Journal › Vol. 12 › Nr. 5 AbstractThe paper describes the synthesis of nanocrystalline zinc ferrite starting from 1,4-butanediol and a mixture of zinc and ironnitrates. During the heating of the obtained solution, a redox reaction takes place with emission of brown nitrogen oxides andformation of a solid powder. This powder was characterized by thermal analysis and FT-IR spectrometry, techniques thatconfirmed the formation of a mixture of zinc and iron carboxylates. This mixture was further used as precursor for zinc fer... Autori: Cornelia Muntean, Marcela Stoia, Paul Barvinschi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26029
KINETIC, EQUILIBRIUM AND THERMODYNAMIC STUDIES OF CESIUM REMOVAL FROM AQUEOUS SOLUTIONS USING AMBERJET UP1400 AND AMBERLITE IR120 RESINS
Environmental Engineering and Management Journal › Vol. 12 › Nr. 5 AbstractThe performance of two cation exchanger resins, Amberjet UP1400 and Amberlite IR120 in the process of Cs(I) ions removalfrom aqueous solutions was examined. Batch experiments were carried out to determine the influence of several parameters(resin dosage, contact time, temperature and initial concentration of Cs(I) ions) on the removal process. The equilibrium wasreached after 60 min for Amberlite IR120 and after 120 min for Amberjet UP1400, with an overall adsorption performance of~97% f... Autori: Adina Negrea, Cornelia Muntean, Corneliu Mircea Davidescu, , Mihaela Ciopec, Petru Negrea ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26032
Spirulina platensis AS BIOSORBENT OF ZINC IN WATER
Environmental Engineering and Management Journal › Vol. 12 › Nr. 5 AbstractZinc is an important metal for humans and the environment. Its intensive application in industry has led to water and soilcontamination. A lot of microorganisms both unicellular and multicellular can be applied for removal of metals from theenvironment. The process of zinc adsorption by cyanobacteria Spirulina platensis biomass was investigated. The concentrationsof 0.34 mM and 3.4 mM of ZnSO4·7H2O were used. The process of biosorption of zinc was studied during 1-hour experiment.To dete... Autori: Gheorghe Duca, Inga Zinicovscaia, Liliana Cepoi, Marina V. Frontasyeva, Sergey S. Pavlov, Svetlana F. Gundorina, Tatiana Chiriac, Valeriu Rudic ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26041
ISOTHERM AND KINETIC STUDIES OF RESIDUAL OIL ADSORPTION FROM PALM OIL MILL EFFLUENT (POME) USING BOILER FLY ASH
Environmental Engineering and Management Journal › Vol. 12 › Nr. 3 AbstractThe removal of residual oil from palm oil mill effluent (POME) using boiler fly ash was studied in this paper, with focus on theadsorption isotherms and kinetic studies by measuring the residual oil concentration using UV-spectrophotometer. The percentresidual oil adsorbed decreased from 80% to 5% as contact time was increased from 10 mins to 120 mins but increased from2.74% to 72.98% as initial concentration of residual oil increased from 0.04812 mg/L to 0.2406 mg/L. Pseudo-second order... Autori: Jude C. Igwe, Stella N. Anioke, Uche Arukwe ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26078
INVESTIGATION OF ISOTHERMAL AND FIXED-BED COLUMN SORPTION OF Cu (II) ONTO ALMOND SHELL
Environmental Engineering and Management Journal › Vol. 12 › Nr. 3 AbstractThe present study reports the efficiency of almond shell as a cheap and available material for the removal of Cu (II) fromcontaminated aqueous solutions. The equilibrium experiments indicated that Cu (II) sorption obeyed the Langmuir isotherm at26, 40 and 55oC. The highest value of the maximum uptake (Qo) from the Langmuir equation was found 6.783 mg g-1 at 40oC.The various thermodynamic parameters such as ΔGo, ΔHo and ΔSo were also calculated. The values of ΔGo varie... Autori: Soheil Aber ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26080
STATISTICAL DESIGN OF EXPERIMENTS FOR THE Cr(VI) ADSORPTION ON WEED Salvinia cucullata
Environmental Engineering and Management Journal › Vol. 12 › Nr. 3 AbstractExperiments were designed to optimize the Cr(VI) adsorption on Salvinia cucullata. The significance of different adsorptionparameters along with their combined effect on the adsorption process has been established. A regression equation wasformulated by representing percentage of Cr(VI) adsorption as a function of different independent variables such as contact time,pH, adsorbate concentration and adsorbent dose. The insignificant terms were assessed through student ‘t’ test and are remo... Autori: Saroj Sundar Baral ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26084
KINETICS AND EQUILIBRIUM ADSORPTION STUDY OF LEAD (II) ONTO LOW COST CLAYS
Environmental Engineering and Management Journal › Vol. 12 › Nr. 3 AbstractThe performance of four low cost Iraqi clays, bentonite (BT), kaolinite (KT), attapalgite (AT) and flint (FT) to remove lead ionsfrom aqueous solutions by adsorption was investigated. Batch experiments were carried out at pre determined equilibration time,adsorbent dosage, solution pH, particle sizes, ionic strength, initial lead ions concentration and temperature. Adsorption of Pb2+ions was strongly affected by pH and best adsorption is achieved at pH 4.5. The systems were investigated ... Autori: Najwa I. Abdulla ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26086
EQUILIBRIUM STUDY OF Pb(II) AND Cd(II) BIOSORPTION FROM AQUEOUS SOLUTION ON MARINE GREEN ALGAE BIOMASS
Environmental Engineering and Management Journal › Vol. 12 › Nr. 1
Abstract
The biosorption of Pb(II) and Cd(II) ions from aqueous solution on marine green algae biomass (Ulva lactuca sp.) was studied in
batch systems, at initial solution pH of 5.0 and biomass dose of 8.0 g/L, considered as optimum experimental conditions. The
obtained results from experiments of a single-component biosorption were analyzed using Langmuir, Freundlich and Dubinin-
Radushkevich isotherm models. The Langmuir equation describe the biosorption isotherm of Pb(II) and Cd... Autori: Laura Bulgariu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26152
ADSORPTION OF DIBUTYL-PHTHALATE ON HUMIC ACID
Environmental Engineering and Management Journal › Vol. 12 › Nr. 9 AbstractBehaviors of adsorption of di-n-butyl phthalate (DBP) on humic acid and the effects of temperature on these processes are studied by solid phase extraction-HPLC method. The results show that the adsorption amounts of DBP increase with increasingequilibrium-concentrations of DBP. Such results could be well described by Langmuir equation. The maximum adsorptionamount (Qmax) and adsorption constant (k) at 35oC were both lower than those at 25oC. Thus, high temperature is unfavorable to the ... Autori: Zhi-dang Yang ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26162
LOW-COST TECHNOLOGIES FOR SAFE DRINKING WATER IN SOUTH-EAST ASIA: OVERVIEW AND APPLICATION TO THE NORTH OF VIETNAM
Environmental Engineering and Management Journal › Vol. 12 › Nr. 11 AbstractIn spite of the ambition of the Millennium Development Goals (MDGs), water supply and sanitation are still worryingly deficientin South-East Asia (SEA). Due to the rapid increase in population, increased urbanization and industrial activities, and absence ofa strong regulatory framework, water quality in this region is impaired due to the high levels of contamination. Because of thechallenge of providing safe drinking water from poor quality water sources, development of low-cost drinkin... Autori: Pham Thi Thuy ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26202
ADSORPTION KINETICS OF REMOVAL OF YELLOW LANASOL DYESTUFF USING GALLINACEOUS FEATHERS
Environmental Engineering and Management Journal › Vol. 12 › Nr. 11 AbstractGallinaceous feathers are an abundant solid waste from the poultry processing industries, which poses disposal problems. Akinetic study dealing with the adsorption process of wool reactive dye, Yellow Lanasol 4G (CI Reactive Yellow 39), ongallinaceous (Gallus gallus, Cobb 500) feathers was carried out. The main research goals of this work were to evaluate theviability of using this waste as adsorbent and to study the kinetics of the adsorption process, using a synthetic effluent. Thechar... Autori: Sónia Adriana Figueiredo ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26203
ADSORPTION OF LEAD AND COPPER FROM AQUEOUS SOLUTION USING UNMODIFIED WHEAT STRAW
Environmental Engineering and Management Journal › Vol. 12 › Nr. 11 AbstractPotential of unmodified Wheat Straw as an adsorbent for the removal of lead and copper was studied. Effect of pH, adsorbentdose, contact time and initial metal concentration on the removal of the metal ions were also investigated. Maximum removal oflead was found to be 43.55% by wheat straw under optimum conditions (pH=5, adsorbent dose=16g/L, contact time= 240minutes, metal concentration=100 mg/L). Unmodified Wheat straw removed 0.381 mg/g of lead. While 56.36% copper removalwas achieve... Autori: Mehwish Anis ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26209
REMOVAL OF ACID BLACK DYE BY PUMICE STONE AS A LOW COST ADSORBENT: KINETIC, THERMODYNAMIC AND EQUILIBRIUM STUDIES
Environmental Engineering and Management Journal › Vol. 12 › Nr. 11 AbstractThe removal of Acid Black 1 dye was investigated by acid treated pumice stone as a low cost adsorbent, since acidicmodifications were expected to improve the sorption capacity. The main components of the considered adsorbent were SiO2 andAl2O3 and acid treated pumice shows irregular structure. The effect of various parameters such as the initial dye concentration,the contact time, the temperature and the pH were studied. An increase of the contact time, the initial dye concentration or a... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26211
FAST AND ECONOMICALLY VIABLE REMOVAL OF A CATIONIC DYE FROM AQUEOUS SOLUTIONS: KINETIC AND EQUILIBRIUM MODELLING
Environmental Engineering and Management Journal › Vol. 12 › Nr. 11 AbstractAdsorption of a cationic dye, methylene blue, from aqueous solutions by using sawdust (without any modification) by batchadsorbers was investigated. The surface characterization of the saw dust was carried out by Fourier transform infrared (FTIR) andscanning electron microscopy (SEM) and pHzpc of the surface was also determined. Effects of different parameters such ascontact time and initial concentration, temperature and pH on the process of removal were studied. The process of removal ... Autori: Sushmita Banerjee ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26216
REDUCING AMMONIA, CHEMICAL OXYGEN DEMAND AND COLOR FROM PRAWN POND WASTEWATER USING COMPOSITE MEDIA
Environmental Engineering and Management Journal › Vol. 12 › Nr. 11 AbstractLow water quality due to high levels of ammonia, chemical oxygen demand (COD), abnormal pH, and undesirable water color isprevalent in many prawn ponds in Malaysia. A composite medium used in the treatment of prawn pond effluent was examinedfor the reduction of undesirable parameters. The composite medium is a mixture of limestone, activated carbon, zeolite, and ricehusk. Experiments were conducted under three different conditions, i.e., sole aeration, adsorption, and adsorption with pre... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26219
A NOVEL APPROACH FOR MODELING Cu2+ AND Zn2+ ADSORPTION FROM INDUSTRIAL LEACHATE BY PEANUT SHELLS
Environmental Engineering and Management Journal › Vol. 12 › Nr.12 AbstractIn this work the adsorption of Cu2+ and Zn2+ from industrial wastewater by peanut shells without any pretreatment wasinvestigated through optimization techniques such as a feed-forward back-propagation artificial neural network and a simplexalgorithm. The Levenberg-Marquardt algorithm was the best back-propagation algorithm, with a minimum mean squared error of0.000217 for Cu(II) and of 0.000229 for Zn2+. Mean square error on the validation set is used as an estimate for variance.Accordi... Autori: Başak Mesci ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26227
EXPLOITATION OF AN ANAEROBIC UP-FLOW COLUMN REACTOR (AUFCR) USING ACTIVATED SLUDGE BIOMASS FOR THE DECOLORIZATION OF DYES AND COD REDUCTION FROM TEXTILE WASTEWATER
Environmental Engineering and Management Journal › Vol. 12 › Nr.12 AbstractThe aims of this study were to investigate the performance of anaerobic up-flow column reactor (AUFCR) and immobilizedactivated sludge biomass (ASB) potential for the adsorption of dye drimarene Blue-K2RL (Db-K2RL) and removal of chemicaloxygen demand (COD) from textile wastewater (TWW). AUFCR with ASB at flow rate of 50 mL h-1 and hydraulic retentiontime (HRT) of 10 h showed 95% dye adsorption at pH 4 and 87% COD reduction at pH 6 while non-activated sludge (NAS)showed only 60% of adsor... Autori: Anwar Ahmad ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26246
STUDY ON THE REMOVAL CHARACTERISTIC OF ACID VIOLET DYE FROM SYNTHETIC WASTEWATER USING A NOVEL RHA/PFA/CFA SORBENT
Environmental Engineering and Management Journal › Vol. 13 › Nr. 1 AbstractA novel RHA/PFA/CFA sorbent was developed by sol-gel method using three types of ashes, i.e. rice husk ash (RHA), palm oilfuel ash (PFA) and coal fly ash. From surface analysis of selected RHA/PFA/CFA sorbents, the spent sorbent had more compactstructures covered by irregular rough surface and the specific structure of raw RHA, PFA, and CFA were no longer visible. Inaddition, lower specific surface area was obtained for spent RHA/PFA/CFA sorbent. Batch studies were performed to evaluatet... Autori: Irvan Dahlan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26272
REMOVAL OF FLUORIDE IONS BY ION EXCHANGE RESIN: KINETIC AND EQUILIBRIUM STUDIES
Environmental Engineering and Management Journal › Vol. 13 › Nr. 1 AbstractThe extent of the problem of the excessive fluoride in drinking water remains an important health issue. In the present work,strong-base anion resins were investigated to assess their sorptive removal capacity of fluoride from water. It was found that theremoval of fluoride was high at natural pH (7) and was improved for increasing contact time and adsorbent dosage. Themaximum sorption of the resin was 13.7 mg/g according to the Langmuir model, namely higher than the values reported in t... Autori: Mohammad Taghi Samadi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26273
ADSORPTIVE REMOVAL OF HAZARDOUS METHYLENE BLUE BY FRUIT SHELL OF Cocos nucifera
Environmental Engineering and Management Journal › Vol. 13 › Nr. 2 AbstractIn this work, fruit shell of Cocos nucifera (FSCN) treated with H3PO4 has been tested as a low cost adsorbent for the removal of methylene blue (MB) from aqueous solution in batch and column process. The adsorption of MB onto FSCN was affected by the initial solution pH, dye concentration, temperature, column internal diameter and adsorbent dose. The adsorption equilibrium data was fitted well to the Langmuir model and the maximum adsorption capacity was found to be 20.74 mg/g at 40ºC. K... Autori: Pijush Kanti Mondal, Rais Ahmad, Rajeev Kumar ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26274
STUDY OF Cd (II) AND Cr (VI) BIOSORPTION BY MESOCARPS OF ORANGE AND SOUR ORANGE FROM AQUEOUS SOLUTIONS
Environmental Engineering and Management Journal › Vol. 13 › Nr. 2 AbstractThe objectives of this study were to investigate of cadmium and chromium adsorption from aqueous solutions by using orange (Citrus sinensis var Tampson) and sour orange (Citrus aurantium) mesocarp. The chemometric approach was applied for the optimization of removal percent of Cd2+ and Cr6+. To optimize Cd2+ and Cr6+ removal percent, the effect of four experimental parameters on removal percent was investigated by means of multivariate analysis. The considered factors were Cd2+ and Cr6+ ... Autori: Maryam Bagheri Ardebilian, Mohammad Ali Zazouli, Pouneh Ebrahimi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26287
SORPTION OF HEXAVALENT CHROMIUM ION ONTO A STRONG BASIC ANION EXCHANGER: EQUILIBRIUM ISOTHERMS AND KINETIC STUDIES
Environmental Engineering and Management Journal › Vol. 13 › Nr. 2 AbstractHexavalent chromium can contaminate drinking water resources and should therefore be removed from industrial waste effluents. The use of ion exchange resin was examined in batch tests to remove Cr (VI) from acidic solution by Amberlite IRA 410. Equilibrium data were analyzed and modelled using Freundlich and Langmuir adsorption isotherms and the results showed that the adsorption behaviour of Cr (VI) could be accurately described by means of a Langmuir model. The monolayer adsorption cap... Autori: Abdeltif Amrane, Aicha Bensmaili, Malika Chabani, Yasmine Ait Ouaissa ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26289
REMOVAL OF As(III) AND As(V) FROM AQUEOUS SOLUTION USING MODIFIED SOLID WASTE VEGETABLE OIL INDUSTRY AS A NATURAL ADSORBENT
Environmental Engineering and Management Journal › Vol. 13 › Nr. 2 AbstractThis paper presents the results of the removal of arsenite and arsenate ions from an aqueous solution using Fenton modified solid waste vegetable oil industry (SWVOI). Several factors (such as pH, contact time and Fe2+/H2O2 ratio, initial arsenic ion concentration and adsorbent concentration) that affect the arsenic ion adsorption on the SWVOI adsorbent material were investigated. The sorption characteristics of the adsorbent material before modification were also studied and compared wi... Autori: Hoda Amiri, Mehdi Ahmadi, Nemat Jaafarzadeh, Susana Silva Martínez ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26290
ADSORPTION OF A BASIC DYE ONTO ESMEGEL CLAY
Environmental Engineering and Management Journal › Vol. 13 › Nr. 2 AbstractThis study focus on the possibility of removing the basic textile dye Astrazon Blue FGGL 300% 03, from an aqueous solution, using Esmegel clay as adsorbent. The characterization of the adsorbent included the distribution of particle size, physical textural properties, chemical composition and determination of the point of zero charge. The equilibrium isotherms were determined at 20 and 30 °C, pH at 6.0 and 7.5 and adjusted to the Langmuir and Freundlich models, having the latter led to b... Autori: Chia-Yau Cheng, Paula M.S.S. Luís, Rui A. R. Boaventura ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26292
MINIMIZATION OF CHEMICAL RISK BY USING RECOVERED ALUMINIUM FROM METALLURGICAL SLAG AS COAGULANT IN WASTEWATER TREATMENT
Environmental Engineering and Management Journal › Vol. 13 › Nr. 2 AbstractSecondary aluminium production inherently generates significant amounts of slag of variate composition and including dangerous compounds. Consequently, a care treatment of the resulted slag is imperatively necessary for preventing the environment pollution and for recovering valuable materials even if present in low amounts. The aluminium recovering procedure is based on a chemical and hydrometallurgical slag treatment, leading to the technical grade aluminium sulphate (AS), possible to ... Autori: Carmen Tociu, Cristina Maria, Elena Diacu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26295
ADSORPTION OF METHYLENE BLUE DYE ONTO SURFACE MODIFIED CASHEW NUT SHELL
Environmental Engineering and Management Journal › Vol. 13 › Nr. 3 AbstractIn the present study, batch adsorption experiments were performed for the removal of methylene blue (MB) dye from its aqueoussolution using newly prepared surface modified cashew nut shell (SMCNS) by varying the operating parameters like solution pH,adsorbent dose, initial dye concentration, contact time and temperature. The SMCNS has been prepared by treating the cashewnut shell with the sulphuric acid. Adsorption equilibrium data were analyzed by the model equations such as Langmuir,Fr... Autori: Krishnan Gayathri Lashmi, Muthukumar Priyadharshini, Ponnusamy Senthil Kumar, Ramasundaram Vijayakumar Abhinaya, Subramanian Sivanesan, Vishwanathan Arthi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26309
REMOVAL AND PRECONCENTRATION OF CADMIUM ON POLYSTYRENE-GRAFT-ETHYLMETHACRYLATE COPOLYMER
Environmental Engineering and Management Journal › Vol. 13 › Nr. 3 AbstractThe removal and determination of toxic heavy metal ions in aqueous solutions has been given much more attention over the pastfew years. In this paper, a removal and separation/preconcentration method for cadmium species on Poly S15-g-EMA100 (a kind ofpolystyrene-graft-ethyl methacrylate copolymer) in water samples was developed. Some experimental parameters, such assolution pH, sample flow rate, type and concentration of eluent, amount of adsorbent and effect of common matrix ions werein... Autori: Harun Ciftci ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26317
EQUILIBRIUM MODELLING OF COPPER IONS BIOSORPTION BY DATE STONES AND PALM-TREES WASTE
Environmental Engineering and Management Journal › Vol. 13 › Nr. 3 AbstractThe biosorption equilibrium isotherms of copper ions from wastewater onto date stones (DS) and palm-trees Waste (PTW) inaqueous solution over a range of temperatures between 25 and 70°C were studied and modelled. To predict the biosorptionisotherms and to determine the characteristic parameters for process design, five models frequently used in the literature -Langmuir, Freundlich, Temkin, Sips and Redlich-Peterson were applied to experimental data.The Langmuir’s model gives the most acc... Autori: Fatiha Mechati, Fatima Addoun, Mejdi Jeguirim, Meriem Belhachemi, Zohra Belala ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26319
RECOVERY OF Fe3+, Ti4+ AND Ni2+ IONS FROM SLUDGES RESULTED DURING URANIUM ORES PROCESSING BY IMMOBILIZATION ON ZEOLITES
Environmental Engineering and Management Journal › Vol. 13 › Nr. 3 AbstractThe possible recovery of three microelements contained in the sludges resulted after chemical leaching of uranyl ions fromuranium ores was investigated, using four types of zeolites as adsorbents. The variation of the retention degree in time of 3cations: Fe3+, Ti4+ and Ni2+, adsorbed on: ETS-10, ETS-4, ZSM-5 and mordenite was followed. The characteristic adsorptionparameters connected to Langmuir and Freundlich isotherms were also determined. For a given adsorbent, the rate of globalret... Autori: Alexandru Cecal, Dumitru Gânju, Maria Ignat, Nicoleta Melniciuc-Puica, Petrisor Mugurel Samoila ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26327
BIOSORPTION OF CADMIUM (II) FROM AQUEOUS SOLUTION BY NaCl-TREATED Ceratophyllum demersum
Environmental Engineering and Management Journal › Vol. 13 › Nr. 4 AbstractThe biosorption characteristics of Cd(II) ions using the NaCl-treated Ceratophyllum demersum were studied. The effect ofaltering the conditions, such as solution pH, the biosorbent dosage and contact time for the biosorption of Cd(II), and thebiosorption/desorption studies, were investigated. Langmuir, Freundlich, Dubinin-Radushkevich and Redlich–Peterson modelswere applied to describe the biosorption isotherms. Langmuir model fitted the equilibrium data better than the other isotherms(R... Autori: Ali Akbar Babaei, Mehdi Ahmadi, Nadali Alavi, Nemat Jaafarzadeh, Pari Teymouri ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26331
EVALUATION OF THE ADSORPTION OF COPPER (II) FROM AQUEOUS SOLUTION BY D151 RESIN
Environmental Engineering and Management Journal › Vol. 13 › Nr. 4 AbstractStudies about the adsorption behavior of Cu(II) on D151 resin were conducted. Parameters including the effects of pH,temperature, contact time and initial metal ion concentration were studied by batch methods. Results showed that the adsorptionwas strongly dependent on pH of the medium, and the maximum uptake was obtained at pH 6.90. In the batch system, the D151resin exhibited the highest Cu(II) uptake as 277.8 mg/g at 318K, calculated by the Langmuir model. The adsorption kinetics were... Autori: Caiping Yao, Chunhua Xiong, Xinyi Chen ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26333
REMOVAL OF PHOSPHORUS BY ION-EXCHANGE RESINS: EQUILIBRIUM, KINETIC AND THERMODYNAMIC STUDIES
Environmental Engineering and Management Journal › Vol. 13 › Nr. 4 AbstractThe removal of phosphorus by strongly basic anion exchanger was investigated. Removal efficiency increased with contact time,resin mass and initial solute concentration, while temperature showed a reverse effect. Equilibrium data were best fitted ontoLangmuir isotherm model (R2>0.99). Maximum sorption capacity of the resin was 66.22 mg/g, namely significantly higher thevalues reported in the literature. The Freundlich parameter (n = 4.3) and the Langmuir separation factor (RL = 0.067-... Autori: Abdeltif Amrane, Hamid Reza Ghaffari, Mansur Zarrabi, Mohammad Mahdi Soori, Mohammad Noori Sepehr, Saied Borji ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26343
REMOVAL OF Cu (II) IONS FROM AQUEOUS SOLUTION BY ADSORPTION ONTO ACTIVATED CARBON PRODUCED FROM Guazuma ulmifolia SEEDS
Environmental Engineering and Management Journal › Vol. 13 › Nr. 4 AbstractGuazuma ulmifolia seeds activated carbon was modified by sulphuric acid to enhance the adsorption capacity for Cu(II) ions.This modified activated carbon produced from Guazuma ulmifolia seeds (GUAC) was investigated by observing the changes inits characteristics and the Cu(II) adsorption behavior. The prepared GUAC was characterized by BET, FTIR and SEM analysis.The kinetic data were analyzed using four adsorption kinetic models: the pseudo-first and pseudo-second order equations,intrapa... Autori: Muthukumar Priyadharshini, Palanichamy Baskaralingam, Palanichamy RajKumar, Ponnusamy Senthil Kumar, Selvaraj Dinesh Kirupha, Subramanian Sivanesan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26344
SIMULATED IMPACT OF ACID RAIN ON ORGANIC MATTER, PHOSPHORUS AND OTHER SOIL COMPONENTS
Environmental Engineering and Management Journal › Vol. 13 › Nr. 6 AbstractAcid rain is a general term used to describe acid depositions, i.e. rain, fog and snow (known as wet deposition), as well as acidgases and particles (known as dry deposition). Acid rain is of particular environmental concern in Romania, as many soils havelately become acidic, causing serious damages to plants, animals and human beings. The purpose of this study is to evaluate bysimulation the impact of acid rain on a podzol sample taken from the Retezat National Park, a Romanian protecte... Autori: Clementina Moldovan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26399
NUMERICAL STUDY OF DESICCANT WHEEL BEHAVIOR FOR ENVIRONMENTALLY FRIENDLY AIR CONDITIONING SYSTEM
Environmental Engineering and Management Journal › Vol. 13 › Nr. 7 AbstractOpen-cycle desiccant air conditioning represents an attractive alternative to the classical method based on electric vaporcompression. The performance of the rotary dehumidifier has a significant effect on the capability, size and cost of the whole airconditioning system. In the present paper a detailed two-dimensional mathematical model of coupled heat and mass transferprocesses manifesting at the moist air-solid desiccant interface has been formulated. It was studied packed bed absorbe... Autori: Carmen Ema Panaite ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26434
SILICA IMPREGNATED WITH CYPHOS IL-101 FOR Cs+ ADSORPTION
Environmental Engineering and Management Journal › Vol. 13 › Nr. 8 AbstractA series of experiments were performed to quantify the adsorption of Cesium on Silica impregnated withtrihexyl(tetradecyl)phosphonium chloride (Cyphos IL-101). Non-radioactive cesium solution was used as a surrogate of theradioactive 137Cs. The obtained impregnated Silica with the studied ionic liquid was characterized through scanning electronmicroscopy, energy dispersive X-ray analysis and Fourier transform infrared spectroscopy in order to put in evidence that theimpregnation with the... Autori: Adina Negrea ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26473
SECONDARY MUNICIPAL EFFLUENT TREATMENT BY CATALYTIC WET HYDROGEN PEROXIDE OXIDATION
Environmental Engineering and Management Journal › Vol. 13 › Nr. 9 AbstractWater recycling and reuse, answering the needs of creating cleaner water resources, need to be closely related with water resourcemanagement and technologies. Current municipal wastewater treatment plants are capable to control conventional pollutants(carbonaceous compounds, particulate matter, nutrients). Priority organic compounds, like polyaromatic hydrocarbons,polychlorinated biphenyls, endocrine disrupting chemicals, personal care products, pesticides etc., may escape the treatment ... Autori: Andreea Chelba ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26521
MEASUREMENTS OF THE THERMAL CONDUCTIVITIES OF SOME COMMONLY USED INSULATING MATERIALS AFTER WETTING
Environmental Engineering and Management Journal › Vol. 13 › Nr. 11 AbstractCurrently, thermal insulation of buildings is required from both an energy savings perspective and a money savings perspective.Insulation is primarily installed on the outer surface of the buildings. Weather and other circumstances can produce humidity thatcan act on the building structure, e.g., by changing its heat capacity, the heat transfer coefficient and/or other factors. As a result,it is important to measure the sorption behaviors of the construction materials. To perform sorptio... Autori: Ferenc Szodrai ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26550
REMOVAL OF CADMIUM (II) FROM AQUEOUS MEDIA USING COOH/TUD-1 MESOPOROUS SOLID. KINETIC AND THERMODYNAMIC STUDIES
Environmental Engineering and Management Journal › Vol. 13 › Nr. 10 AbstractThe adsorption potential of 10 wt.% COOH/TUD-1 material for removing Cd2+ from aqueous solutions was investigated via thebatch technique, and the effects of pH, temperature and contact time were studied. Experimental data showed that the maximumCd2+ adsorption, 90%, occurred at pH 6. The adsorption equilibrium was reached within 35 min for 10 wt.% COOH/TUD-1. Theadsorption mechanism was investigated in terms of its thermodynamics and kinetics. The adsorption data were fitted using theLan... Autori: Nabila Bensacia ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26558
DISTRIBUTION OF ADDED PHOSPHORUS IN SEDIMENT UNDER INTERMITTENT RESUSPENSION CONDITIONS
Environmental Engineering and Management Journal › Vol. 13 › Nr. 10 AbstractThe incorporation of phosphorus (P) into sediments and the changes in its bioavailability under intermittent P input and sedimentresuspension conditions were investigated via laboratory experiments. The sediments were disturbed daily for 10 min and thenallowed to settle for 1430 min after each disturbance to simulate the intermittent sediment resuspension conditions. The removalof soluble reactive P from the overlying water under sediment resuspension was greater than that under static c... Autori: Li Dapeng ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26567
PHYTOACCUMULATION, COMPETITIVE ADSORPTION AND EVALUATION OF CHELATORS-METAL INTERACTION IN LETTUCE PLANT
Environmental Engineering and Management Journal › Vol. 13 › Nr. 10 AbstractPresent study was envisaged to study chelators-metal interaction in phytoaccumulation of metals as a bioremediation technologyto decontaminate metal pollution and adsorption of metals on soil. Lactuca sativa was used as model plant for phytoaccumulationto identify uptake of Cadmium (Cd) and Lead (Pb) and their subsequent accumulation in edible tissue of plant. Cadmium andlead were two selected metals for phytoaccumulation and copper was also studied for adsorption experiment. Green house... Autori: Audil Rashid ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26568
EQUILIBRIUM, KINETIC AND THERMODYNAMIC STUDIES OF CATIONIC RED X-GRL ADSORPTION ON GRAPHENE OXIDE
Environmental Engineering and Management Journal › Vol. 13 › Nr. 10 AbstractGraphene oxide (GO) was prepared from expandable graphite by a modified Hummers’ method and characterized by TEM,XRD, FTIR, and Raman spectroscopy. The batch adsorption experiments were carried out to study the effect of variousparameters, such as the initial concentration, adsorbent dosage, initial pH, contact time and temperature on adsorption propertiesof cationic red X-GRL onto GO. The Langmuir and Freundlich models were used to fit the experimental data of adsorptionisotherms. The k... Autori: Jiankun Sun ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26570
POTENTIAL USE OF Crambe abyssinica PRESS CAKE AS AN ADSORBENT: BATCH AND CONTINUOUS STUDIES
Environmental Engineering and Management Journal › Vol. 13 › Nr. 12 Abstract
This study evaluates the potential of Crambe abyssinica press cake, a residue from crambe oil extraction and/or biodiesel
production, as an adsorbent for removal of cationic dyes from wastewaters. Batch adsorption tests were performed at 30, 40 and
50oC. Adsorption kinetics and equilibrium were satisfactorily described by the pseudo second-order and Freundlich models,
respectively. Adsorption was spontaneous and exothermic. Fixed bed adsorption (breakthrough curve) was satisfactoril... Autori: Adriana S. Franca ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26597
BATCH AND COLUMN REMOVAL OF CHROMIUM (VI) FROM AQUEOUS SOLUTION USING POLYPYRROLE
Environmental Engineering and Management Journal › Vol. 14 › Nr. 1 Abstract
The present study deals with the removal of Cr (VI) from aqueous solution by polypyrrole (PPy). Response surface methodology
(RSM) was applied for the design and analysis of experiments in the optimization of pH, temperature, initial concentration,
contact time and adsorbent dose during the removal of the Cr (VI). The optimum adsorbent dose, temperature, initial
concentration of Cr (VI), pH and contact time were found to be 0.8 g, 46.5 oC, 187.5 mg/L, 5.3 and 15.4 min respectively. ... Autori: Ehsan Hasani ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26614
ADSORPTION PROPERTIES OF ACTIVATED CARBON FROM WILD PLANT PREPARED BY CHEMICAL ACTIVATION
Environmental Engineering and Management Journal › Vol. 14 › Nr. 1 Abstract
Activated carbon was prepared from renewable plant material, that is Euphorbia rigida, by chemical activation using zinc chloride
as activating reagents. The adsorption of Basic Blue 9 (BB9) onto activated carbon was investigated in a batch system with
respect to contact time, pH and temperature from aqueous solutions. The experimental data indicated that the adsorption isotherms
are well described by the Langmuir isotherm model and the calculated maximum adsorption capacity of acti... Autori: Özgül Gerçel ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26627
STUDY OF THE SYNTHESIS AND ENVIRONMENTAL REMOVAL OF 4,4’-DIPYRIDINE DERIVATIVES
Environmental Engineering and Management Journal › Vol. 14 › Nr. 2 Abstract
Dipyridine derivatives are used on large scale and pose significant environmental problems. We have synthesized dipyridine
derivatives with: 5-chlorovaleric acid, α-dichlorhidrin, iodoacetamide and 11-bromoundecanoic acid. The synthesized substituted
compounds were investigated by LC-MS. The adsorptive removal of dipyridine derivatives from aqueous solution has been
studied using medicinal activated carbon. The adsorption rate has been investigated under the controlled process... Autori: Ana Chira ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26638
LAYERED DOUBLE HYDROXIDES AS ADSORBENTS FOR ANIONIC DYE REMOVAL FROM AQUEOUS SOLUTIONS
Environmental Engineering and Management Journal › Vol. 14 › Nr. 2 Abstract
Reactive Blue 19 (RB 19) dye removal from aqueous solutions by using layered double hydroxides containing nitrate as the
intergallery anion (MgAlLDH) as adsorbents was investigated. The adsorption process was found to be influenced by the contact
time, the initial dye concentration, the presence of inorganic anions and the temperature. The XRD and FTIR analysis evidence
two competitive processes: adsorption and/or intercalation of the molecules may take place, depending on the initi... Autori: Maria Celina Alexandrica ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26651
ION EXCHANGE PROCESSES ON WEAK ACID RESINS FOR WASTEWATER CONTAINING COOPER IONS TREATMENT
Environmental Engineering and Management Journal › Vol. 14 › Nr. 2 Abstract
The capacity of ion exchange resins, MN 500 and C100 H, for the removal of copper ions from aqueous solution has been
investigated under different conditions, namely: initial solution pH, initial metal-ion concentration and contact time.
The adsorption of Cu(II) on these resins follows the first-order reversible kinetic. The film diffusion of Cu (II) in these ion
exchange resins was shown to be the main rate limiting step. The studies showed that these cation exchange resins can be ... Autori: Cristina Modrogan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26658
BIOSORPTION OF ANTIMONY BY BROWN ALGAE S. muticum AND A. nodosum
Environmental Engineering and Management Journal › Vol. 14 › Nr. 2 Abstract
Environmental contamination by antimony has been described as a critical issue in many articles. In this study, the Sb(III)
removal by two brown algae, Sargassum muticum and Aschophylum nodosum, has been tested. Algae were collected in Viana do
Castelo beach (Portugal). Preliminary tests were carried out and, based on the results, Sargassum muticum was chosen for
subsequent experiments. Kinetic data were described by pseudo second order model. After about four hours contact time the... Autori: Gabriela Ungureanu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26659
ADSORPTION EQUILIBRIUM AND EFFECTIVE DIFFUSIVITY IN CYLINDRICAL ALUMINA PARTICLES IMPREGNATED WITH CALCIUM CHLORIDE
Environmental Engineering and Management Journal › Vol. 14 › Nr. 3 Abstract
Adsorption equilibrium and effective diffusion coefficients of water vapor, in cylindrical particles of activated alumina (A) and
activated alumina impregnated with calcium chloride (MCA), are experimentally determined. The experiments were conducted at
303 K and 323 K using cylindrical particles with 2.5 mm in both length and diameter. Diffusion coefficients were determined
from the kinetics of water sorption. The measurements were conducted in a constant pressure unit based on a m... Autori: Eugenia Teodora Iacob Tudose ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26665
INFLUENCE OF NANOPOROUS MATERIALS ON THE CHEMICAL COMPOSITION OF MERLOT AND CABERNET SAUVIGNON WINES
Environmental Engineering and Management Journal › Vol. 14 › Nr. 3 Abstract
The variation of the content of 12 phenolic compounds from 5 months aged Cabernet Sauvignon and Merlot wine samples treated
with siliceous and aluminosiliceous porous materials was analysed through a HPLC method. The standard physical-chemical
analyses (alcoholic concentration, total acidity, volatile acidity, relative density, reductive sugars, total dry extract, non-reductive
extract, free SO2, total SO2, pH) were registered. The used nanomaterials: SBA-15, Al-MCM-41, KIT-6 were s... Autori: Camelia Elena Luchian ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26667
CELLULOSE CELLETS AS NEW TYPE OF ADSORBENT FOR THE REMOVAL OF DYES FROM AQUEOUS MEDIA
Environmental Engineering and Management Journal › Vol. 14 › Nr. 3 Abstract
In the current study, the structural and adsorptive properties of the micro crystalline cellulose beads, Cellets 200 and 350, as well
as the possibility to use them as adsorbents for removal of reactive dye Brilliant Red HE-3B and cationic dye Methylene Blue
from aqueous solutions have been investigated. Batch experiments were conducted to study the effect of adsorbent particles size
(200-500 μm), initial solution pH (1-11), adsorbent dose, dye concentration, temperature (2-450C)... Autori: Daniela Suteu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26668
EQUILIBRIUM PERFORMANCES OF CRYSTAL-RIGHTTM CR100 ZEOLITE USED IN WATER SOFTENING PROCESS
Environmental Engineering and Management Journal › Vol. 14 › Nr. 3 Abstract
The present work investigates the performance of Cristal-RightTM CR100 zeolite based on the equilibrium and thermodynamics
water softening process. The commercial zeolite was characterized by scanning electron microscopy combined with energy
dispersive X-ray spectroscopy and FT-IR spectroscopy. The equilibrium performances of zeolite were evaluated by the sorption
capacity of calcium cations from calcium chloride solutions varying the calcium concentrations corresponding to moderate... Autori: Liliana Lazăr ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26670
ADSORPTION OF ENDOCRINE DISRUPTORS ON EXFOLIATED GRAPHENE NANOPLATELETS
Environmental Engineering and Management Journal › Vol. 14 › Nr. 3 Abstract
Drinking water treatment using activated carbon (AC) decontamination offers effective methods for removing some organic
compounds, tastes and odors, but it is not so efficient for metals, nitrates, microbial contaminants and other organic and inorganic
contaminants. In the last years, nanotechnologies introduced several types of nanomaterials for organic, inorganic and biological
removal of contaminants in drinking water, such as: sorption, filtrations and catalytic processes. In th... Autori: Elena Radu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26671
PNiPAM-FUNCTIONALIZED MESOPOROUS CARBON FOR THE ADSORPTION OF VITAMIN B2
Environmental Engineering and Management Journal › Vol. 14 › Nr. 3 Abstract
The present research reports the synthesis of poly-N-isopropylacrylamide / mesoporous carbon composites, prepared by radical
polymerization of N-isopropylacrylamide inside mesoporous carbon pores functionalized with carboxylic groups. The deposition
of poly-N-isopropylacrylamide on mesoporous carbon was confirmed by FT-IR spectroscopy, TEM, N2-sorption measurements.
The mesoporous carbon material was found to adsorb vitamin B2 from aqueous solution at room temperature. The obtained
... Autori: Maria Ignat ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26679
REMOVAL OF CARBAMAZEPINE BY ELECTROCOAGULATION: INVESTIGATION OF SOME KEY OPERATIONAL PARAMETERS
Environmental Engineering and Management Journal › Vol. 14 › Nr. 3 Abstract
The performance of electrocoagulation (EC) process, a non-specific electrochemical technology, was investigated for the
removal of carbamazepine (CBZ), an antiepileptic drug, from water. Experiments were carried out in synthetic wastewater in a
batch cell. The respective influences of some key process parameters were studied, such as mixing conditions, initial pH, and
current on aluminium electrodes. Experimental results showed that a CBZ removal efficiency of 62% was observed under... Autori: Tania Yehya ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26683
DEGRADATION AND ADSORPTION BEHAVIOR OF DIBUTYL PHTHALATE IN METHANOGENIC PHASE REFUSE
Environmental Engineering and Management Journal › Vol. 14 › Nr. 3 Abstract
The degradation and adsorption behavior of dibutyl phthalate (DBP) in methanogenic phase refuse was investigated through
laboratory microcosm experiments. The results showed that the half-life of DBP in the sterilized refuse was 5.9 times higher than
in unsterilized samples, but that it decreased by 35.8% when dominant bacterial strains were added. Different concentrations of
DBP did not have obvious effects on its degradation. The half-lives of DBP were decreased by 53.0%, 37.2% an... Autori: Chengran Fang ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26690
INNOVATIVE BIOSORBENT FOR THE REMOVAL OF CADMIUM IONS FROM WASTEWATER
Environmental Engineering and Management Journal › Vol. 14 › Nr. 4 Abstract
In the present work, the removal of cadmium ions from aqueous solution using an agricultural waste as biosorbent, namely trunk
palm fibers was investigated. The adsorption equilibrium and kinetics for this system were studied. Four adsorption models were
applied to understand the nature of the adsorption process. Freundlich adsorption isotherm was found to best fit the experimental
data. The maximum adsorption capacity was found to be 23.8 mg/g. The adsorption process was found to b... Autori: Hosam Altaher ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26699
APPLICATION OF Mangifera indica SEED SHELL FOR EFFECTIVE ADSORPTION OF Fe(II) AND Mn(II) FROM AQUEOUS SOLUTION
Environmental Engineering and Management Journal › Vol. 14 › Nr. 4 Abstract
Adsorption has proved to be an excellent way to treat industrial wastewater, due to its significant advantages like easy
availability, inexpensive, ease of operation and highly efficient, compared to conventional expensive adsorbents like activated
charcoal, alumina etc. The present investigation focused on utilization of Mangifera indica seed shell substrate for the removal of
toxic heavy metals like Fe(II) and Mn(II) from wastewater. Mangifera indica seed shell substrate as an eff... Autori: Tikaram D. Kose ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26713
SYNTHETIC TEXTILE DYE REMOVAL FROM AQUEOUS SOLUTION USING MODIFIED LOCAL CLAY ADSORBENT
Environmental Engineering and Management Journal › Vol. 14 › Nr. 4 Abstract
Locally sourced clay from Kuala-Kangsar town in Perak state Malaysia was used in both its raw (RKKC) and modified (MKKC)
form as adsorbents for the removal of methylene blue (MB) from synthetic textile wastewater in batch adsorption process. The
raw clay was modified through H2SO4 acid treatment, Al(OH)3 ion exchange, calcinations and then molded into beads before
freeze drying. The BET surface areas of RKKC and MKKC were 11 and 100 m2/g, respectively; their elemental analysis and
... Autori: Manase Auta ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26717
REMOVAL OF 2,4 DICHLOROPHENOL FROM WASTEWATER ON COST-EFFECTIVE SORBENTS: KINETICS AND THERMODYNAMICS INVESTIGATIONS
Environmental Engineering and Management Journal › Vol. 14 › Nr. 5 Abstract
Maximum removal (94±1.2%) of 2, 4 dichlorophenol (50 mg.dm-3) was achieved on silica with agitation of 4 hours, at pH 8 and
42°C. The positive enthalpy (ΔH) and negative free energy values (ΔG315K) suggested the endothermic and a spontaneous nature
of sorption. The free energy of the process at all temperature was negative and increased with the increase in temperature. The
values of free energy suggested a spontaneous process where the spontaneity decreased w... Autori: Abdul Ghaffar ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26718
APPLICATION OF MAGNETITE NANOPARTICLES AS ADSORBENT FOR Cr, Cd, Ni AND Cu FROM AQUEOUS SOLUTIONS
Environmental Engineering and Management Journal › Vol. 14 › Nr. 5 Abstract
Magnetite nano-particles (Fe3O4) were synthesized in order to be used as adsorbent for some toxic metal ions (Cr, Cd, Ni and Cu)
present in aqueous solutions (industrial waste waters). The amount of toxic metals (Cr, Cd, Ni and Cu in quaternary aqueous
solutions) before and after contact with the magnetite nano-particles was analyzed by flame atomic absorption spectrometry
(FAAS). Different operational parameters such as metal concentration and pH of the quaternary solution, as well... Autori: Ecaterina Matei ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26721
STUDIES ON GLUTARALDEHYDE CROSSLINKED XANTHATED CHITOSAN TOWARDS THE REMOVAL OF MERCURY (II) FROM CONTAMINATED WATER STREAMS
Environmental Engineering and Management Journal › Vol. 14 › Nr. 5 Abstract
Chitosan was cross linked with gluteraldehyde and chemically modified by introducing xanthate group onto its backbone using
carbon disulfide under alkaline conditions. This crosslinked xanthated chitosan flakes (XC) was used as an adsorbent for the
removal of mercury ions from contaminated water streams near the coal mines. XC was found to be far more efficient than the
conventionally used adsorbent activated carbon. FTIR studies indicated the interaction both amine and the xanthate... Autori: Avinash Gupta ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26725
ADSORPTIVE REMOVAL OF PHOSPHATE FROM AQUEOUS SOLUTIONS BY WASTE SNAIL AND CLAM SHELLS
Environmental Engineering and Management Journal › Vol. 14 › Nr. 5 Abstract
Large quantities of snail and clam shells are left as waste material when their meat is used as food for people. It has been a big
problem that how to treat these wastes and usually these are land filled as wastes. In the present paper, these shells are studied as
recycling resource for phosphate removal from solutions. Laboratory-scale batch experiments were conducted to evaluate the
efficiency of snail and clam shells in removing phosphate from aqueous solutions. Major factors inv... Autori: Ji Bing Xiong ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26727
ADSORPTIVE REMOVAL OF METHYLENE BLUE FROM AQUEOUS SOLUTIONS BY PUMICE POWDER: PROCESS MODELLING AND KINETIC EVALUATION
Environmental Engineering and Management Journal › Vol. 14 › Nr. 5 Abstract
This study was carried out to investigate the adsorption of methylene blue (MB) onto pumice powder, as a low-cost adsorbent for
the removal of dyes. The experiments were designed based on a central composite design (CCD) and the process was analyzed
and modeled using response surface methodology (RSM). In order to study the adsorption process, three important factors viz.
pumice dosage (20- 50 mg/50mL), MB concentration (20-40 mg/l) and contact times (5- 35 min) were chosen as varia... Autori: Kiomars Sharafi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26729
DETERMINATION OF EQUILIBRIUM, KINETIC AND THERMODYNAMIC PARAMETERS OF ACID RED 88 ADSORPTION ONTO MONTMORILLONITIC CLAY
Environmental Engineering and Management Journal › Vol. 14 › Nr. 5 Abstract
The aim of this study is to evaluate adsorption kinetics, isotherms and thermodynamic parameters of anionic textile dye (Acid
Red 88) onto montmorillonitic clay from aqueous solutions. The parameters of pH, initial dye concentrations, temperature, and
the adsorbent dosage were investigated experimentally. Four kinetic models including pseudo-second order, pseudo-nth order,
Bangham’s equation and double exponential equation (DEE) were selected to follow the adsorption process. ... Autori: Sedef Dikmen ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26731
A NEW KINETIC AND THERMODYNAMIC APPROACH TO PHENOL BIOSORPTION BY CHITOSAN AND KERATIN
Environmental Engineering and Management Journal › Vol. 14 › Nr. 5 Abstract
Chitosan and keratin were tested as low cost biosorbents to remove phenol from water solutions at variable temperature (20-
50°C), initial phenol concentration (10-90 mg L-1) and pH (5.0-10.0), and fixed biosorbent dosage (10 g L-1). The pseudo-second
order kinetic model exhibited the best fit to the experimental data and allowed estimating theoretical values of sorption capacity
of 4.51 mg g-1 with keratin and 2.87 mg g-1 with chitosan. Equilibrium isotherms, described at best ... Autori: Attilio Converti ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26743
PREPARATION, CHARACTERIZATION AND ADSORPTION PROPERTIES OF MFe2O4 (M = Ni, Co, Cu) NANOPOWDERS
Environmental Engineering and Management Journal › Vol. 14 › Nr. 6 Abstract
MFe2O4 nanopowders (M = Ni, Co, Cu) were prepared using the precursor technique, starting from the corresponding metal
nitrates and poly(vinyl alcohol)-PVA. During the heating of metal nitrates- PVA solution, a redox reaction takes place around
150°C, leading to the formation of M(II) and Fe(III) carboxylates. These compounds were used as precursors for the ferrites
nanopowders. The desired ferrites were obtained by thermal decomposition of the carboxylates; the obtained... Autori: Marcela Stoia ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26745
COMPARATIVE CHARACTERISTICS OF SOME POLYMERIC MATERIALS IMPREGNATED WITH IONIC LIQUID FOR THE REMOVAL OF RADIONUCLIDES
Environmental Engineering and Management Journal › Vol. 14 › Nr. 6 Abstract
In order to remove various radionuclides (Tl+, Sr2+and La3+) from wastewaters we used three solid supports of (styrenedivinylbenzene)
grafted with different pendant groups (1-triphenylphosphonium; 2-izo-propylphosphonate; 3-
aminoethylaminomethyl). The solid supports with different pendant groups were impregnated with ionic liquid (Cyphos IL-101-
trihexyltetradecylphosphonium chloride). IR-spectra, EDX-ray and SEM image were used to characterize the adsorbent obtained
after the imp... Autori: Mihaela Ciopec ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26749
COMPARATIVE PHOTOCATALYTIC PERFORMANCES OF UNDOPED/N-DOPED TIO2 UNDER SOLAR IRRADIATION FOR A REACTIVE YELLOW 125 AZO REACTIVE DYE DEGRADATION FROM WATER
Environmental Engineering and Management Journal › Vol. 14 › Nr. 6 Abstract
In this study, the comparative photocatalytic activities of undoped and N-doped TiO2 anatase nanocrystals towards the
degradation of Reactive Yellow 125 (RY125) azo reactive dye in aqueous solutions under UV and VIS irradiation ranges were
investigated. Both nanocrystals prepared by a fast-hydrothermal method using titanium isopropoxide as precursor were
characterized morpho-structurally by X-ray diffraction, SEM/EDX analysis and BET measurements. Also, optical features of the
nano... Autori: Corina Orha ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26757
ADSORPTION OF SIMAZINE AND BOSCALID ONTO ACID-ACTIVATED NATURAL CLINOPTILOLITE
Environmental Engineering and Management Journal › Vol. 14 › Nr. 7 Abstract
It has been recently shown that acid activation enhances the ability of zeolitic tuffs to bind weak organic bases. More specifically,
tuff containing acid-resistant zeolites (i.e. clinoptilolite) exhibits higher sorption capacity than chabazite/phillipsite-rich tuff.
Based on the above considerations, we investigated in depth the adsorption behaviour of two pesticides onto acid-activated
clinoptilolitic tuff under different experimental conditions. The pesticides simazine and boscal... Autori: Stefano Salvestrini ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26791
A WASTE CATALYST FOR A HAZARDOUS CHLORINE – CONTAINING PLASTIC WASTE
Environmental Engineering and Management Journal › Vol. 14 › Nr. 9 Abstract
The recycling of plastic waste is important both in the conservation of resources and the environmental protection. A plastic
waste (PE/PP/PS/PVC) was pyrolyzed over a series of post-use FCC catalysts using a fluidizing reaction system similar to the
FCC process operating isothermally at ambient pressure. Experiments carried out with these catalysts gave good yields of
valuable hydrocarbons with differing selectivity in the final products dependent on reaction conditions. A model ba... Autori: Ta-Tung Wei ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26836
IMPACT OF BRUNAUER EMMETT TELLER ISOTHERM ON RESEARCH IN SCIENCE CITATION INDEX EXPANDED
Environmental Engineering and Management Journal › Vol. 14 › Nr. 9 Abstract
A bibliometric analysis along with a brief historical and modifications overview and scientific applications was carried out to
reveal the impact of Brunauer-Emmett-Teller (BET) isotherm on scientific research. The data was based on the Science Citation
Index Expanded (SCI-EXPANDED) database of the Thomson Reuters Web of Science. BET isotherm received a total of 10,418
citations from its publication to 2012. Among them, 9,117 (88%) were research articles by 20,108 authors with 95% m... Autori: Moonis Ali Khan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26839
STUDY OF PRESSURE DROP IN FIXED, FLUIDIZED AND SPOUTED BED OF SEVERAL ADSORBENT MATERIALS
Environmental Engineering and Management Journal › Vol. 14 › Nr. 10 Abstract
An experimental study on the hydrodynamics of fixed, fluidized and spouted granular bed was performed. With this aim two
commercial adsorbent materials and a composite material obtained by impregnation with a hygroscopic inorganic salt were
employed. The fluid phase consisted in dry air. The obtained results highlight the influence of grain size, material density and
roughness over pressure drop and gas velocity. Increasing grain size leads to decreasing pressure drop and increasing... Autori: Ioan Solomon ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26854
INFLUENCE OF OPERATING CONDITIONS ON THE REMOVAL OF HEAVY METALS FROM INDUSTRIAL WASTEWATER BY BIOSORPTION
Environmental Engineering and Management Journal › Vol. 14 › Nr. 10 Abstract
Free cells of Rhizopus oryzae were used to study adsorption of several cations (Cu2+, Zn2+, Mn2+, Ni2+, Cd2+ and Pb2+) from
wastewater within various experimental conditions. The influence of biomass dosage, pH and temperature on the removal
process was investigated. The sorption efficiency increased with increasing the temperature in the range from 25 ºC to 30 ºC and
pH from 5 to 8. The maximum removal percentage was achieved at a biosorbent concentration 0.25 – 0.3... Autori: Kolishka Tsekova ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26857
COLOR REMOVAL OF REACTIVE TEXTILE DYES FROM AQUEOUS SOLUTION BY RAW AND MODIFIED FUNGAL BIOSORBENT
Environmental Engineering and Management Journal › Vol. 14 › Nr. 10 Abstract
This study concentrates on the reactive biosorption of dyes such as Reactive Red 3:1 (RR3:1), Reactive Orange 13 (RO13),
Reactive Blue 13 (RB13), Reactive Blue 72 (RB72). The modified fungal biosorbent, Paecilomyces sp., had a higher dye
biosorption yield in our study. 100% of biosorption yield observed on RR3:1 and RB13 and 94.09% of color removal of RO13
with the chemically modified biosorbent were great. Also, such modified biosorbent exhibited remarkable performance in
simulate... Autori: Ahmet Çabuk ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26860
TRUE COLOR REMOVAL FROM REAL TEXTILE WASTEWATER USING WASTE TEA LEAF POWDER
Environmental Engineering and Management Journal › Vol. 14 › Nr. 10 Abstract
This study investigated the use of tea waste to decolorize refractory dyestuff from textile wastewater. The influence of the
solution pH and the contacting time were examined for various adsorbents, namely green tea-leaf powder (GTP), black tea-leaf
powder (BTP), and powdered activated carbon (PAC). Results from batch experiments revealed that the reduction in true color
(ADMI) increases with decreasing pH. The ADMI reduced from 1106 to 150 with 0.8 g/L of GTP at pH 2. The results a... Autori: Chih-Huang Weng ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26863
EXPERIMENTAL STUDY ON ADSORPTION OF PHOSPHORUS ON SEDIMENT COMPONENTS WITH DIFFERENT PARTICLE SIZES
Environmental Engineering and Management Journal › Vol. 14 › Nr. 10 Abstract
The adsorption of phosphorus (P) on sediment plays a significant role in phosphorus transport in aquatic systems. This research
examined the effect of the main components of sediments (including iron (Fe), manganese (Mn) oxides and organic matter (OM))
on P adsorption and to evaluate their relative contribution with different sediment particle sizes. The sediments were separated
into four particle-size fractions: 0-30 μm, 30-62 μm, 62-90 μm, and 90-125 μm, and then selec... Autori: Yang Xiao ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26873
REMOVAL OF LEAD (II) IONS BY ACTIVATED CARBON PREPARED FROM DURIAN PEEL: ADSORPTION KINETICS AND ISOTHERMS
Environmental Engineering and Management Journal › Vol. 14 › Nr. 12 Abstract
In this study, activated carbon was synthesized from durian peel and used for the removal of lead (II) ions from water. The
activated carbon was produced with physical activation method using CO2 as the activating agent at 900 oC. Prior to the
activation process, durian peel was carbonized under either nitrogen atmospheric or vacuum pyrolysis in order to compare the
properties of the synthesized activated carbons. Suitable adsorption kinetics and isotherm models for the lead (II) re... Autori: Samorn Hirunpraditkoon ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26901
STUDY OF THE ADSORPTION OF Cu2+, Cd2+ AND Pb2+ ON AMORPHOUS Al(OH)3 IN DRINKING WATER SUPPLY NETWORKS
Environmental Engineering and Management Journal › Vol. 14 › Nr. 12 Abstract
Trace metal elements commonly exist in drinking water. Excessive exposing on them may result in lots of health problems. This
paper mainly focuses on the accumulations of Cu2+, Cd2+, and Pb2+ in drinking water supply networks with amorphous Al(OH)3
formation. The effects of pH, water flow rate, and metal element contents were investigated at laboratory bench scale. It was
found that chemical adsorption mainly occurred at pH > 7.0. Suspended Al(OH)3 showed a strong adsorption capa... Autori: Wendong Wang ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26906
REMOVAL OF METHYLENE BLUE BY AN AQUEOUS SUSPENSION OF NANO-SIZED TIO2 CONTAINING DIFFERENT SALTS
Environmental Engineering and Management Journal › Vol. 14 › Nr. 12 Abstract
The photocatalytic degradation (PCD) of methylene blue (MB) in aqueous suspensions of nano-sized TiO2 particles containing
high concentrations of NaCl, MgCl2, and CaCl2 was studied. The rates of PCD and adsorption of ions were monitored by
measuring the total organic carbon (TOC) and using inductively coupled plasma-atomic emission spectrometry, respectively. The
results showed that the removal rate decreased with increasing concentrations of NaCl, MgCl2, and CaCl2. The trend for th... Autori: Yuping Jiang ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26910
HYDROTHERMALLY SYNTHESIZED ORGANO-SILICATE NANOPARTICLES AS ADSORBENT AND SLOW RELEASE FORMULATION OF 2,4-DICHLOROPHENOXYACETIC ACID (2,4-D)
Environmental Engineering and Management Journal › Vol. 14 › Nr. 12 Abstract
Synthesized silicates and their organically modified products have been least explored for their potential use in contaminated
water remediation and also as slow release formulations. In this study, adsorption potential and applicability of surfactant
modified clinoptilolite (SMC) and montmorillonite (SMM) nanoparticles as adsorbent and slow release formulation of 2,4-
dichlorophenoxyacetic acid (2,4-D) have been investigated. The surface modification of hydrothermally synthesized s... Autori: Deepesh Bhardwaj ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26913
PHOTOCATALYTIC DEGRADATION OF ANILINE IN AQUEOUS SOLUTION USING ZnO NANOPARTICLES
Environmental Engineering and Management Journal › Vol. 15 › Nr. 1 Aniline is a priority pollutant, which is known as a toxic organic pollutant released as effluent from several industries. Several
physicochemical methods have been used for degradation of this pollutant. In this study, photocatalytic degradation of aniline
from synthetic wastewater by ZnO nanoparticle was considered. The effects of different variables, such as irradiation time, the
amount of photocatalyst, initial pH values and initial concentration of pollutant on the photodegradation of an... Autori: Ahmad Jonidi Jafari ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26929
BIOSORPTION OF SAFRANIN ONTO CHEMICALLY MODIFIED BIOMASS OF MARINE Aspergillus wentii: A KINETIC STUDY
Environmental Engineering and Management Journal › Vol. 15 › Nr. 1 The biosorption of a basic dye, safranin from aqueous solutions by marine fungus Aspergillus wentii, which was chemicallymodified
by esterification of the carboxylic acids (CB), or methylation of amine (NB), or raw biomass (RB) was investigated.
The equilibrium was established after 40 min and the experimental kinetic data obtained for various forms of A.wentii were
applied to the pseudo-first order, pseudo-second order, Bingham and Weber-Morris kinetic models. The pseudo-second order
model ... Autori: Yasmin Khambhaty ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26930
SORPTIVE REMOVAL OF DIBUTYL PHTHALATE FROM AQUEOUS SOLUTIONS BY BAMBOO-DERIVED BIOCHAR
Environmental Engineering and Management Journal › Vol. 15 › Nr. 1 Adsorptive removal of dibutyl phthalate (DBP) by bamboo biochar (BC) was investigated under various experimental conditions.
BC demonstrated excellent sorptive ability to remove DBP from the aqueous solutions. The removal of DBP by BC increased as
the contacting time increased and reached an equilibrium value after 240 min. The presence of natural organic matter decreased
the removal efficiency while increased the time to reach sorption equilibrium. The adsorption of DBP on BC could be well
... Autori: Junliang Wang ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26934
EFFECT OF CLAY SOIL CONTENT ON FECAL BACTERIA REMOVAL IN AN INTERMITTENT MEDIA INFILTRATION SYSTEM
Environmental Engineering and Management Journal › Vol. 15 › Nr. 1 Water scarcity, the degradation of freshwater resources, and wastewater pollution are reaching crisis levels, especially in arid
regions of the world. The reuse of wastewater was investigated by using intermittent media infiltration (IMI) to evaluate fecal
coliform (FC) removal efficiency. Twelve IMI columns were packed with soil and natural filtering materials (sand, zeolite,
vermicompost and charcoal) at percentages of 25, 50 and 75. The municipal wastewater was treated for the FC analysis ... Autori: Sasirot Khamkure ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26935
EQUILIBRUM AND KINETIC STUDIES ON THE ADSORPTION OF PENICILLIN G BY CHESTNUT SHELL
Environmental Engineering and Management Journal › Vol. 15 › Nr. 1 Because of their toxic effects on the food chain and sources of water, antibiotics are potential pollutants that represent an
important environmental problem. The objective of this research was to study the adsorption of penicillin G (PEN G) onto
chestnut shell using a batch adsorption system. Maximum adsorption was achieved at pH 3.0. The equilibrium uptake capacity
(mg/g) increased with increasing levels of initial penicillin G concentration. The uptake capacity of penicillin G onto chestnu... Autori: Amir Sheikh Mohammadi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26940
ADSORPTION OF PHENOL WITH THE GRAFTED POLYMER OF P(MMA-MAH)- PEGME IN AQUEOUS SOLUTION
Environmental Engineering and Management Journal › Vol. 15 › Nr. 2 The grafted polymer of P(MMA-MAh)- PEGME synthesized was used as adsorbent to remove phenol in aqueous solution.
Through the adsorption research of phenol, it was found the removal percentage (%) of phenol was promising when pH was less
than 6. With the adsorbent dose increasing, the removal percentage increased, meanwhile the adsorption amount qe (mg·g-1)
correspondingly decreased. It was taken 35h for the phenol adsorption with the grafted polymer to reach the equilibrium. The
study... Autori: Yun Huang ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26966
EVALUATION ON THE RURAL DRINKING WATER QUALITY IN A CENTRALIZED SUPPLIED AREA OF CHINA
Environmental Engineering and Management Journal › Vol. 15 › Nr. 2 As a result of the rapid development of China’s economy, many surface and groundwater have become polluted. Assuring high
quality drinking water, especially for the rural areas has recently received much attention. In this study, the drinking water quality
in one centralized water supply network was evaluated by analyzing 28 pollutant indices at 35 sampling points. It was determined
that the concentrations of most organoleptic and physical indices were stable in all the water samples. T... Autori: Wendong Wang ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26967
KINETIC AND EQUILIBRIUM STUDIES ON NITRATE ADSORPTION FROM AQUEOUS SOLUTION BY LEWATIT FO 36
Environmental Engineering and Management Journal › Vol. 15 › Nr. 4 The adsorption characteristics of nitrate ions from aqueous solution using Lewatit FO 36 was investigated as a function of pH,
biomass dosage and contact time. Results showed that optimum conditions were obtained at pH 8, adsorbent dosage of 160 mg/L
and contact time of 60 min. At the optimized experimental parameters, the maximum nitrate adsorption capacity of Lewatit FO
36 was 200 mg/g and nitrate adsorption followed Freundlich model. Among seven kinetic models used in this study, the
adso... Autori: Mehdi Ahmadi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26996
INVESTIGATION OF AMMONIUM ION ADSORPTION ONTO REGENERATED SPENT BLEACHING EARTH: PARAMETERS AND EQUILIBRIUM STUDY
Environmental Engineering and Management Journal › Vol. 15 › Nr. 4 The release of nitrogen compounds into the environment is a major concern worldwide. Different studies howed that recycled
materials have a high removal capacity for pollutants. Bentonite and its major clay minerals, smectites clays are common
bleaching agents used for oil refinery bleaching and known as bleaching earth (BE). In this study regeneration of spent bleaching
earth (SBE) acquired from the vegetable oil industry was surveyed via different methods and the regenerated spent bleaching... Autori: Mohammad Malakootian ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27000
REMOVAL AND RECOVERY OF Al(III) AND Cr(VI) FROM AQUEOUS SOLUTION BY WASTE BLACK TEA
Environmental Engineering and Management Journal › Vol. 15 › Nr. 4 In this study the immobilized waste black tea (Camellia synensis) was used as biosorbent for the removal and recovery of Al(III)
and Cr(VI) ions from the synthetic aqueous solutions. Batch experiments were conducted to optimize the various biosorption
parameters that affect the biosorption capacity of immobilized waste black tea. Maximum biosorption capacity was found with a
biosorbent dose of 0.1g/100 mL for both metal ions. Optimum biosorption capacity for both Al(III) and Cr(VI) ions was o... Autori: Haq Nawaz Bhatti ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27004
EFFECT OF CARBONIZATION ON BANANA PEELS FOR REMOVAL OF CADMIUM IONS FROM AQUEOUS SOLUTION
Environmental Engineering and Management Journal › Vol. 15 › Nr. 4 Adsorption studies of cadmium(II) were conducted on 623oK or 723oK carbonized banana peels named as BP623 and
respectively BP723 as well as on the dried ones (BP). Carbonization enhances the quality of organic by-product used as
adsorbent, reduces the equilibrium time and improves the quality of the final product (water). Evaluation of the effects of pH,
contact time and solution temperature showed that the uptake of cadmium(II) ions was highly dependent on these factors, and
increased with ... Autori: Josiane Ponou ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27009
ARSENIC REMEDIATION OF AQUEOUS MEDIA USING PINUS ROXBURGHII SARG. (PINOPHYTA) BARK
Environmental Engineering and Management Journal › Vol. 15 › Nr. 4 The arsenic removal from aqueous medium was investigated through adsorption by employing finely powdered bark of Pinus
roxburghii Sarg. The batch mode laboratory scale experiments were conducted to investigate the removal efficiency of Pinus
bark against total arsenic and the effect of pH, contact time, adsorbent dose and initial adsorbate concentration on adsorption to
optimize the process. Langmuir and Freundlich isotherms were used to validate the adsorption data and respective constants w... Autori: Syed Hasnain Shah ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27013
REMOVAL OF HEXAVALENT CHROMIUM FROM WATERS BY MEANS OF A TiO2-Fe3O4 NANOCOMPOSITE
Environmental Engineering and Management Journal › Vol. 15 › Nr. 5 This paper aims to establish the capacity removal of hexavalent chromium [Cr(VI)] from wastewaters using a TiO2 – Fe3O4 based
nanocomposite. Latest researches in the field point adsorption as a better option for removal of heavy metal ions from waters, this
method being more efficient and cost effective, in comparison with other advanced methods like reverse osmosis, ion exchange,
nanofiltration, etc. Based on this information, the goal of this work had as purpose the obtaining, charact... Autori: Andra Predescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27025
MAGNETIC NANOPARTICLES USED IN ENVINRONMENTAL ENGINEERING FOR Pb AND Zn REMOVAL
Environmental Engineering and Management Journal › Vol. 15 › Nr. 5 Maghemite nanoparticles (γ-Fe2O3) were synthesized in order to be used as magnetic adsorbent for two heavy metals, Pb(II) and
Zn(II), from aqueous solutions. γ-Fe2O3 was prepared from magnetite nanoparticles and was tested for single and binary aqueous
solutions. Efficiency removal (%) for single solutions appears only after 10 minutes and was higher than 80%. In case of binary
solutions, same results regarding efficiency removal were registered after 60 minutes, being almost 90% ... Autori: Ecaterina Matei ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27029
NATURAL AND WASTE MATERIALS AS GREEN SORBENTS FOR Cd(II) REMOVAL FROM AQUEOUS EFFLUENTS
Environmental Engineering and Management Journal › Vol. 15 › Nr. 5 Removal of Cd(II) from aqueous streams is of special concern because of its very high toxicity and persistent nature. The
sorbents based on natural and waste materials have very promising performances in the treatment of Cd(II) contaminated waters.
Very few reviews are available that provide valuable information on the various aspects of the utilization of natural and waste
materials for Cd(II) metal ions removal. In this context, this review examines a wide range of materials as green sorben... Autori: Lavinia Tofan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27033
OPTIMIZATION OF THE BIOSORPTION OF Cr3+, Cd2+ AND Pb2+ USING A NEW BIOWASTE: Zea mays SEED CHAFF
Environmental Engineering and Management Journal › Vol. 15 › Nr. 7 This study highlights the potential use of yellow Zea mays seed chaff (YZMSC) biomass as a biosorbent for the removal of Cr3+,
Cd2+ and Pb2+ ions from aqueous solutions. Fourier transformed Infrared analysis of the biomass suggests that YZMSC biomass is
basically composed of cellulose and methyl cellulose. The biosorption capacities, qmax, of YZMSC biomass for Cr3+, Cd2+ and
Pb2+ are 14.68, 121.95 and 384.62 mg/g respectively. Biosorption equilibrium was achieved at 20, 30 and 60 min for Cr3+... Autori: Jonathan Oyebamiji Babalola ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27083
ADSORPTION OF Zn2+ AND Ni2+ IONS FROM AQUEOUS SOLUTION ONTO Phyllanthus debilis: KINETICS & EQUILIBRIUM STUDIES
Environmental Engineering and Management Journal › Vol. 15 › Nr. 7 This work evaluates the potential of Phyllanthus debilis for the adsorption of Zn2+ and Ni2+ ions using synthetic solutions.
Adsorption experiments were performed in order to examine the effect of pH, contact time, biomass concentration and initial
metal ion concentration in the removal process, in a batch mode. The results revealed that the adsorption is highly pH dependent.
The adsorption of Zn2+ and Ni2+ ions were concentration dependent and increased from 2.446 to 8.688 mg/g for Zn2+ and ... Autori: Mohammad Aslam ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27084
SEQUESTRATION OF COPPER (II) FROM SIMULATED WASTEWATER USING PRE–TREATED RICE HUSK WASTE BIOMASS
Environmental Engineering and Management Journal › Vol. 15 › Nr. 8 This paper reports the potential of rice husk waste biomass to remove copper (II) from simulated wastewater under different
experimental conditions. For this, rice husk has been pre–treated by boiling, formaldehyde and concentrated sulphuric acid.
Fourier Transform Infrared Spectroscopy, Scanning Electron Microscopy and Energy dispersive analysis X–ray analyses were
performed before and after adsorption, to explore number and position of the functional groups available for copper ... Autori: Manjeet Bansal ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27095
IMPACT OF BIOSTIMULATION AND BIOAUGMENTATION AS BIOREMEDIATION SYSTEMS ON DIESEL CONTAMINATED SOILS
Environmental Engineering and Management Journal › Vol. 15 › Nr. 8 This paper analyzes and compares the effects of bioremediation on total petroleum hydrocarbon (TPH) degradation using
composting techniques as well as biostimulation and bioaugmentation approaches. Compost and sludge were added as organic
amendments with the dual purpose of providing both nutrients and microorganisms to the contaminated soil. In addition, the
effect of inoculation with white-rot fungus Trametes versicolor was assessed. Two different types of soils were considered: a
poor soi... Autori: Juliana Abraham ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27101
VALORIZATION OF TYRES WASTE PYROLYSIS RESIDUE IN LIGHTWEIGHT MATERIALS
Environmental Engineering and Management Journal › Vol. 15 › Nr. 9 The aim of this study is to investigate an innovative way to utilize the char obtained from tyres pyrolysis, in order to realize lightweight
materials for building. Pyrolysis residue, mixed with three types of waste glass, has been used as raw material to obtain
lightweight materials, exploiting its capability to behave as foaming agent. The results demonstrate that the pyrolysis char is a
good foaming agent for the mixtures 50/50 with glassy sand and packaging glass waste, thermal treated at... Autori: Fernanda Andreola ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27119
VALORIZATION OF GLASS WASTES AS SUPPORT FOR LIPASE IMMOBILIZATION
Environmental Engineering and Management Journal › Vol. 15 › Nr. 9 This work focuses on treatment of lead polluted waste glass from urban collection (Pb≈5% wt) for its valorization as support in
the immobilization of lipase, because soda-lime glasses are used in enzymatic catalysis.
First of all, an extraction process of surface Pb was performed. The process is based on nitrilotriacetic acid (NTA) chelating
agent. The operating conditions are: T=80°C, t=1h, pH 10, solid/liquid weight ratio=1/10, reagent concentration=0.1 M. Leaching
tests at contr... Autori: Luisa Barbieri ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27122
EFFECT OF METHYLENE BLUE ON ELECTRON MEDIATED MICROBIAL FUEL CELL BY Saccharomyces cerevisiae
Environmental Engineering and Management Journal › Vol. 15 › Nr. 9 Microbial fuel cells (MFCs) are bioelectrochemical reactors that directly convert the chemical energy stored in chemical bonds of
organic substrates, to electrical energy. Saccharomyces cerevisiae was implemented as biocatalyst in the anaerobic anode
compartment of an MFC using glucose as carbon source and methylene blue as electron mediator. Our results showed the effect
of methylene blue on the microbial metabolism and the reversibility of the redox reaction of the shuttle mediator in the p... Autori: Ruggero Rossi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27131
THE EFFECT OF Si CONTENT ON FERRIHYDRITE SORPTION CAPACITY FOR Pb(II), Cu(II), Cr(VI), AND P(V)
Environmental Engineering and Management Journal › Vol. 15 › Nr. 9 In this study, the impact of silicate admixture in 2-line ferrihydrite on its sorption properties is presented. Synthetic ferrihydrites
with broad Si content in the range of 0 to 1.5 Si/Fe molar ratios were prepared and characterized using X-ray diffractometry
(XRD), Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM-EDS). With an increase in the
Si/Fe ratio, a typical XRD peak at 2.5Å broadens and shifts toward 3 Å; the position of Si-O stretchi... Autori: Gabriela Pieczara ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27140
EQUILIBRIUM STUDIES ON THE BIOSORPTION OF LEAD (Pb2+) CONTAMINATED WASTEWATER USING CATTAILS LEAVES
Environmental Engineering and Management Journal › Vol. 15 › Nr. 10 Dried Typha angustifolia (TA) leavesor commonly known as the common cattail were evaluated as an adsorbent for the
adsorption of lead in synthetic aqueous solutions. Equilibrium studies were conducted in a batch mode and the selected sorption
isotherms were then applied. Equilibrium was achieved after 8 hours. The selected sorption isotherms were the Langmuir,
Freundlich, D-R and Temkin model. Data fitting was done based on linear regression analysis. The adsorption system fitted the
Langmui... Autori: Yen Ling Sharain-Liew ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27166
EFFECTIVE MERCURY REMOVAL USING A NEW DEVELOPED POLYMER CONTAINING 2-(2′ THIAZOLYLAZO) P-CRESOL
Environmental Engineering and Management Journal › Vol. 15 › Nr. 11 A new material containing 2-(2′ thiazolylazo) p-cresol (TAC) grafted poly acrylamide (PAA) was prepared and its adsorption
ability was studied for the removal of inorganic mercury from aqueous media. Adsorption of Mercury (II) ions from aqueous
solution was investigated in detail as a function of mercury concentration, pH, ionic strength, and temperature. The adsorption
data were analyzed by using the Langmuir, Freundlich and Dubinin-Radushkevich (DR) models. The adsorption of Mercury (... Autori: Selçuk Şimşek ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27170
BIOSORPTION OF LEAD(II) FROM AQUEOUS SOLUTIONS USING ADSORBENTS PREPARED FROM PEANUT HULLS, SOYBEAN SHELLS AND GRAPEFRUIT PEELS
Environmental Engineering and Management Journal › Vol. 15 › Nr. 11 Equilibrium and kinetics of biosorption of lead(II) from aqueous solutions by local low-cost agricultural by-products – peanut hulls, soybean shells and grapefruit peels were compared to develop high-efficient and low-cost biosorbents for removal of lead(II) from wastewater. Batch kinetics showed adsorption equilibrium at about 90 min and the adsorption process for the three biosorbents was better represented by the pseudo-second-order model than the pseudo-first-order model. Batch equilib... Autori: Rui Yu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27176
USE OF CHITOSAN-IRON(III) FOR THE ADSORPTION OF THE DYE ACID RED 29: ISOTHERM, KINETIC, REUSE AND FACTORIAL DESIGN
Environmental Engineering and Management Journal › Vol. 15 › Nr. 11 In this study, chitosan-iron(III) was used as adsorbent of the dye acid red 29. The effect of pH, temperature and concentration of the dye on the adsorption capacity were evaluated. The maximum adsorption capacity was calculated from the adsorption isotherms which were well fitted by Sips isotherm model. The process followed the kinetic model of pseudo-second-order. The activation parameters showed that the adsorption process is spontaneous and favorable. A decrease in adsorption capacity was ob... Autori: Carla Albertina Demarchi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27181
ADSORPTION OF TARTRAZINE ON AN IRON MODIFIED ZEOLITIC TUFF
Environmental Engineering and Management Journal › Vol. 15 › Nr. 11 The adsorption of tartrazine from aqueous solution was evaluated using an iron (III) modified zeolitic tuff. The adsorbent was characterized by scanning electron microscopy and X-ray power diffraction; the modification process does not affect the crystalline structure of the zeolitic tuff. Sorption kinetic, isotherms, dose and pH effects were determined and the adsorption behavior was analyzed. The sorption equilibrium was reached in 72 hours, the adsorption capacity determined by the Langmuir m... Autori: Adrián Alcántara-Cobos ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27182
MULTIFUNCTIONAL RESIN DIPHONIX IN ADSORPTION OF HEAVY METAL COMPLEXES WITH METHYLGLYCINEDIACETIC ACID
Environmental Engineering and Management Journal › Vol. 15 › Nr. 11 The aim of this research is to investigate adsorption characteristics of Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Pb(II) complexes with MGDA (methylglycinediacetic acid) from aqueous solutions by using the multifunctional chelating ion exchanger Diphonix. MGDA, belonging to a group of new generation complexones which readily undergo biodegradation, is patented by BASF and marketed under the brand name Trilon M. Optimum adsorption conditions were determined as a function of phase contact time, ... Autori: Justyna Jachuła ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27183
CHITOSAN-BASED ADSORBENTS GELS FOR THE REMOVAL OF TRIS-AZO DYE: ISOTHERMS AND KINETICS STUDIES
Environmental Engineering and Management Journal › Vol. 15 › Nr. 11 The adsorbent gels utilized in this research project were synthesized from non-commercially available chitosan, obtained by deacetylation of chitin, which was isolated from fermented shrimp waste by a major local industrial food biopolymer. Chitosan-based adsorbent gels were used for the removal of a tris-azo dye (Direct Blue 71) from aqueous solutions. Sorption experiments focused on the chemical modification of chitosan using two cross-linking agents, sodium tripolyphosphate (TPP) and glutaral... Autori: Reyna G. Sánchez-Duarte ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27184
BIOSORPTION OF SULFONIC AZODYES ON SPRUCE WOOD SHAVINGS: KINETICS AND SORPTION MECHANISMS
Environmental Engineering and Management Journal › Vol. 15 › Nr. 12 Various azodyes containing one or more sulfonic groups were removed from aqueous solutions by biosorption on untreated wood shavings from Picea abies. The sorption kinetics was described by the pseudo-first-order (PFO), pseudo-second-order (PSO) and modified pseudo-n-order (MPnO) equations, from which the MPnO model provided the best fit to the experimental data. The surface reaction was identified as a rate-limiting step governing the dye sorption on wood shavings, but a mixed kinetics (with a ... Autori: Pavel Janoš ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27207
ADSORPTIVE REMOVAL OF Cu (II) IONS BY DATE PITS: KINETIC AND EQUILIBRIUM STUDIES
Environmental Engineering and Management Journal › Vol. 15 › Nr. 12 Date pits were used as a low-cost adsorbent to study the effective removal of copper (II) ions in an aqueous solution on the basis of adsorption kinetics and isotherm equations. Before and after the adsorption process, the date pits were characterized by electron scanning microscope (ESM) as well as Infrared spectroscopy (IR). The effects of the pH, zero point of charge, the adsorbent mass, and the adsorbent particle size on the adsorption of copper (II) were also studied. Equilibrium data were ... Autori: Tarek E. Khalil ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27212
BIOSORPTION OF ZINC (II) FROM AQUEOUS SOLUTIONS BY NONLIVING LICHEN BIOMASS OF Xanthoria parietina (L.) Th. Fr.
Environmental Engineering and Management Journal › Vol. 15 › Nr. 12 In this study, the biosorption of zinc(II) ions from the aqueous solutions by the lichen biomass of Xanthoria parietina (L.) Th. Fr. was studied as a function of contact time, initial pH of metal solution, biosorbent concentration, initial metal ion concentration and stirring speed in a batch system. The optimum pH value for maximum zinc biosorption was found to be 5.5. Concentrations intervals from 50 mg/L to 250 mg/L were tested and it was observed that the biosorption efficiency depends on th... Autori: Zuleyha Bingul ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27213
ION-EXCHANGE MECHANISM IN BIOSORPTION OF Pb2+ IONS FROM CONTAMINATED WATER BY BANANA STALK WASTE
Environmental Engineering and Management Journal › Vol. 15 › Nr. 12 Banana stalk (BS) waste is used to remove Pb2+ from aqueous solution. Equilibrium data were analyzed with Langmuir and Freundlich adsorption models, which fit better in the former equation. The qmax (maximum metal uptake capacity) for Pb2+ adsorption was 105.14 mg/g of BS at pH 5.0, which followed pseudo-second order kinetics model. IR spectra confirmed the participation of hydroxyl, amino, and acidic functional moieties in the removal of Pb2+. The major mechanism involved in the biosorption of ... Autori: Kashif Iqbal Sahibzada ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27214
CHARACTERIZATION AND UTILIZATION OF ALUNITE ORE FOR ADSORPTIVE REMOVAL OF ZINC: BATCH AND COLUMN STUDY
Environmental Engineering and Management Journal › Vol. 15 › Nr. 12 Adsorption equilibrium, kinetic and dynamic studies were done for removal of zinc (II) from aqueous solutions using alunite ore. The alunite sample was characterized by using X-ray fluorescence (XRF), optical microscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) porosimetry, differential thermal (DTA), and Thermogravimetric (TG) analyses. The batch equilibrium adsorption data of zinc (II) ions onto alunite particles were applied to some... Autori: Hoda Arabyarmohammadi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27216
LEAD(II) REMOVAL FROM AQUEOUS SOLUTIONS BY SERBIAN ZEOLITIC TUFF
Environmental Engineering and Management Journal › Vol. 16 › Nr. 1 The present study was aimed at examining the ability of the natural zeolitic tuff from the Zlatokop deposit in Serbia to remove Pb(II) ions from aqueous solutions under various conditions. It has been found that the adsorption proceeds via an ion-exchange reaction in which the Na+ ions from the clinoptilolite phase of the tuff are replaced to a high degree by aqueous Pb(II) ions. The removal capacity of the clinoptilolite at 298 K varies from 78 mg Pb g–1 (for C0 = 100 mg Pb dm–3) to... Autori: Djordje Stojakovic ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27234
SILICA GEL MODIFIED WITH AMINO IMINE GROUPS AS AN ADSORBENT FOR METALLIC CATIONS
Environmental Engineering and Management Journal › Vol. 16 › Nr. 1 In this study, silica gel initially reacted with N-(2-aminoethyl)-3-aminopropyl-triethoxysilane and subsequently with formaldehyde resulted in a modified solid that contained amino imine groups, Sil2NCH2. The solids were characterized by CHN elemental analysis, thermogravimetric analysis (TGA/DTG), FTIR spectroscopy, 13C solid-state NMR, and nitrogen adsorption/desorption measurements. The adsorption of Cd(II), Pb(II) and Cr(VI) ions onto Sil2NCH2 in aqueous solutions were examined to study the ... Autori: Franklin Pessoa Aguiar ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27242
COMPETITIVE BIOSORPTION OF Pb(II), Cu(II), Cd(II) AND Zn(II) USING COMPOSTED LIVESTOCK WASTE IN BATCH AND COLUMN EXPERIMENTS
Environmental Engineering and Management Journal › Vol. 16 › Nr. 2 Composted livestock waste (CLW) was studied as one low-cost material to remove Pb(II), Cu(II), Cd(II) and Zn(II) from simulated acid mine drainage (AMD) by batch and column experiments. The adsorption isotherm data were well fitted by the Langmuir model. The maximum monolayer adsorption capacities were 0.5485 mmol/g for Pb(II), 0.4092 mmol/g for Cu(II), 0.2246 mmol/g for Cd(II), and 0.1879 mmol/g for Zn(II) at pH 4.0. Due to the competition effect, the adsorption capacity of the single metal ion... Autori: Mingliang Zhang ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27262
THERMAL STUDY OF ADSORBENTS PREPARED FROM WASTE TYRES
Environmental Engineering and Management Journal › Vol. 16 › Nr. 2 Carbonaceous materials were obtained from waste tyres and their potential application as hydrogen sulphide adsorbents was investigated. The adsorbents were obtained by pyrolysis of waste tyres and physical (CO2) or chemical (KOH) activation at 550 and 800ºC. The effect of modification conditions on the performance of waste tyres based materials as adsorbents of H2S at room temperature in dry and wet conditions was investigated. Sorption capacity of such adsorbents was found to strongly depe... Autori: Magdalena Hofman-Bieniek ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27263
HEMP DECONTAMINATION OF POLY-METALLIC AQUEOUS SOLUTIONS
Environmental Engineering and Management Journal › Vol. 16 › Nr. 3 This study investigates the adsorption of several metals in aqueous solution, by hemp materials (loose fibre and felted fibre). After characterization of the fibre, an extensive study was conducted on the adsorption properties of this material. The experiments were carried out in poly-metallic aqueous solutions containing Al, Co, Cr, Cu, Ni and Zn at a concentration of 1 mg L-1 and 10 mg L-1 each. The pH effect was found to lead to an optimum between pH 4 and 4.5. The kinetics of the adsorption ... Autori: Justine Bugnet ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27272
AMMONIUM ADSORPTION ON OXIDIZED EXFOLIATED GRAPHITE NANOPLATELETS
Environmental Engineering and Management Journal › Vol. 16 › Nr. 3 Ammonium is an environmental contaminant encountered in water and soils, its admissible concentrations in soils and waters being established by legislation. Removal of ammonium ions from aqueous solutions from different matrix can be done with several sorbents, among which nano-adsorbents, such as oxidized exfoliated graphite nanoplatelets (ox-xGnP) offer practical solutions, based on their high specific surface area, associated sorption sites and efficiency of application. Several parameters su... Autori: Daniela Bogdan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27273
MODELING EQUILIBRIUM DATA FOR Cd (II) ADSORPTION BY PEAT USING NON-LINEAR REGRESSION ANALYSIS
Environmental Engineering and Management Journal › Vol. 16 › Nr. 3 The Romanian peat was used as low-cost adsorbent to remove Cd(II) ions from aqueous solutions. The cadmium adsorption capacity of the peat was studied as a function of the solution pH (3-5.5) and temperature (293 – 333 K). Adsorption capacity was found to increase with the pH increasing and temperature decreasing and attained a maximum value of 27.9 mg/g at pH = 5±0.1 (acetate buffer) and 293 K. In addition, various thermodynamic parameters such as free energy change (ΔG0), en... Autori: Catalin Balan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27276
Cu2+ REMOVAL FROM WASTEWATERS BY USING COMPOST AS SORBENT
Environmental Engineering and Management Journal › Vol. 16 › Nr. 4 The paper aims to present the sorption properties of two sorbent substrates (composts) prepared by aerobic fermentation from vegetables waste composted with beech sawdust (BR2) and beech ash (BC1) to be used for Cu2+ removal from wastewaters. The composts structures and surface properties were characterised in terms of active groups (FTIR), crystallinity (XRD), morphology (SEM), topography (AFM) and specific surface and pores analysis (BET), and the changes in properties after Cu2+ sorption were... Autori: Ileana Manciulea ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27323
NEW MESOPOROUS TITANIUM OXIDE-BASED PHOTOACTIVE MATERIALS FOR THE REMOVAL OF DYES FROM WASTEWATERS
Environmental Engineering and Management Journal › Vol. 16 › Nr. 4 The remarkable photocatalytic properties of titanium dioxide and the high adsorption capacity of the mesoporous materials were
combined to obtain active photocatalysts for the decomposition of Rhodamine 6G dye. The mesoporous TiO2 was obtained by
the controlled hydrolysis-condensation of titanium isopropoxide, using hexadecyl-trimethyl-ammonium bromide as template,
followed by calcination to remove the organic matter. Subsequently, this sample was doped with sodium wolframate and
platinum. T... Autori: Doina Lutic ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27325
HEAVY METALS AND GAMMA RADIOACTIVITY BIOACCUMULATIONIN Artemisia absinthium L. GROWN ON A WASTE DUMP
Environmental Engineering and Management Journal › Vol. 16 › Nr. 4 In the current context of industrialization, chemical and radioactive pollution is a concern for environmental protection and
interference with human health. Care for environmental protection also includes vegetation that grows spontaneously in
potentially contaminated places, thus avoiding illness among the population if consumed. The study area is located at 4.5km SSE from downtown Bacău City, Romania and is the result of the manufacture of H3PO4 through the wet method. In this study, t... Autori: Mioara Săndulache Rachieru ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27331
INFLUENCE OF SOIL MATRIX ON SOIL-WATER RETENTION CURVE AND HYDRAULIC CHARACTERISTICS
› › Nr. 4 The composition and the structure of the soil matrix have an important role in determining the water and the air regime into the
soil. In the soil pore the area occupied by water and air, capillary and adsorption phenomena occur, together defining the suction of the matrix. The suction-humidity relationship varies from one soil to another, but also to the same soil in time.
This paper sets out the results of investigations aimed at highlighting the influence of the composition and structure of... Autori: Florian Stătescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27332
REMOVAL OF HEAVY METALS FROM WASTEWATER BY CHEMICALLY ACTIVATED SEWAGE SLUDGE
Environmental Engineering and Management Journal › Vol. 16 › Nr. 7 Effective adsorbents were developed from sewage sludge by chemical activation with different activators (5M ZnCl2, 3M H2SO4, 3M H3PO4, 5M ZnCl2: 3M H2SO4, and 5M ZnCl2: 3M H3PO4). The developed adsorbents were used for the removal of the heavy metals Cd (II), Pb (II), Cu (II) and Mn (II) from wastewater. The effect of several parameters (pH, initial metal ion concentration, adsorbent dose, contact time and solution temperature) on the metal adsorption capacity were evaluated by batch experiments... Autori: Mohamed Nageeb Rashed ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27385
EFFECT OF pH IN THE SYNTHESIS OF ORGANO-CLAYS FOR RARE EARTHS REMOVAL
Environmental Engineering and Management Journal › Vol. 16 › Nr. 8 Two montmorillonitic clays were modified with N-(methoxy-polyethylene glycol) ethylene diamine and tested as sorbents for
removal of Rare Earths (REs) from aqueous solutions. Lanthanum was chosen as representing element of REs family and
adsorption tests were performed with the aim of selecting a system with good uptake efficiency for the pollutant abatement in
wastewaters. The effects of pH were studied and the properties of the obtained final materials were evaluated with simple model
syst... Autori: Elena Maria Iannicelli-Zubiani ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27408
DECOLORIZATION OF p-DIMETHYLAMINOBENZAL-RHODANINE UNDER PHOTOCATALYTIC PROCESS BY USE OF TITANIUM DIOXIDE NANOPARTICLES AT VARIOUS BUFFER pHs
Environmental Engineering and Management Journal › Vol. 16 › Nr. 9 This paper presents the decolorization of p-Dimethylaminobenzalrhodanine using titanium dioxide nano-particles under
photocatalytic process at various buffer media under air atmosphere. Several effective agents including nano-photocatalyst
loading, illumination time, pH of medium and initial dye concentrations have been subjected to be estimated. Furthermore,
kinetic investigations of photocatalytic process fitted the pseudo-first-order kinetic for dye decolorization at all considered buffer
... Autori: Morteza Montazerozohori ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27423
SYNTHESIS OF ALGINATE AMIDE COMPOSITE USING MICROWAVE AND ITS DYE REMOVAL ABILITY
Environmental Engineering and Management Journal › Vol. 16 › Nr. 9 In this work, magnetic alginate was synthesized by encapsulating of Nickel Zinc Ferrite nanoparticle within Ca-alginate. The
synthesized magnetic alginate was modified by ethylenediamine using microwave radiation to remove anionic dye from
wastewater. The characteristics of magnetic nanoparticle, magnetic alginate and magnetic alginate amide (MAA) were studied
using Fourier transform infrared (FTIR) and Scanning electron microscope (SEM). FTIR analysis confirmed the amidation of
alginate. Di... Autori: Niyaz Mohammad Mahmoodi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27424
ADSORPTION CHARACTERISTICS OF ALGINATE COMPOUNDS FOR REMOVAL OF CERIUM IONS FROM AQUEOUS SOLUTION
Environmental Engineering and Management Journal › Vol. 16 › Nr. 9 Removal of the heavy metal ions from water disposals remains a widespread problem due to their adverse influence on public
health. The most harmful materials are the products of nuclear fission called radioisotopes such as cerium ions. Cerium barely
interacts with adsorbent materials, therefore the new substances capable to bind cerium are of great interest. Ca and Na alginate
samples were incubated in Ce3+ solutions; adsorption capacity was measured and the results were evaluated using Langm... Autori: Maxim Khotimchenko ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27435
APPLICATION OF ARTIFICIAL NEURAL NETWORK ON MODELING OF REACTIVE BLUE 19 REMOVAL BY MODIFIED POMEGRANATE RESIDUAL
Environmental Engineering and Management Journal › Vol. 16 › Nr. 9 The Artificial Neural Network (ANN) model was used to predict dye (Reactive Blue 19) removal efficiency from aqueous
solution using modified pomegranate residual based on 124 experimental sets. Three-layer ANN models with different neurons
numbers at a hidden layer were developed. The optimum network yielded a network error of 0.0054 and 0.9606 for mean square
error and coefficient of determination, respectively. Furthermore, sensitivity analysis of the network revealed that the adsorbent
do... Autori: Elham Radaei ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27439
PERFORMANCE CHARACTERISTICS OF SYNTHETIC ZEOLITE F9 IN TREATING HIGH IRON AND MANGANESE ACID MINE DRAINAGE
Environmental Engineering and Management Journal › Vol. 16 › Nr. 10 The negative effects of acid mine drainage (AMD) on the natural and human environments are well understood in South Africa, yet a robust and economic AMD treatment technology has not been developed. The current study aimed at exploring the performance of synthetic zeolite F9 in AMD treatment with specific focus on iron and manganese removal. For this, batch adsorption mode was adopted for which the effects of adsorbent dosage, initial pH and temperature were investigated. As a result, it was fou... Autori: Mike Masukume ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27454
COPPER(II) ADSORPTION ONTO HYDROXYAPATITE
Environmental Engineering and Management Journal › Vol. 16 › Nr. 10 In this study, the adsorption of Cu(II) ions on the uncalcined and calcined nanocrystalline hydroxyapatites was investigated. The nanohydroxyapatites were prepared by wet coprecipitation method and their physicochemical properties were investigated using XRD, BET and SEM-EDX analysis. The uncalcined and calcined hydroxyapatite samples have crystal sizes smaller than 100 nm and a specific surface area of 325 m2/g and 69 m2/g, respectively. The effects of solution pH, adsorbent dose, initial solut... Autori: Ana Maria Mateiuc ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27464
TREATMENT OF WASTEWATER WITH A HIGH C/N RATIO IN SEQUENCING BATCH BIOREACTOR (SBBR) CONTAINING BIOCARRIER
Environmental Engineering and Management Journal › Vol. 16 › Nr. 11 Wastewater treatment using sequencing batch reactor (SBR) has certain advantages over conventional activated sludge system. The performance of sequencing batch reactor in treating high C/N ratio was investigated with suspended polyurethane and polystyrene attached growth biomass configuration. A sequence of 4 hr HRT, 0.3 month SRT and 1kg COD/m3 was employed to study treatment efficacy. Treatment performance was assessed by means of chemical oxygen demand (COD), total nitrogen (TN) and total pho... Autori: Beenish Saba ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27478
PERFORMANCE OF MODIFIED BENTONITES FOR ADSORPTION OF PHENOL: MECHANISMS, KINETICS AND ISOTHERMS
Environmental Engineering and Management Journal › Vol. 16 › Nr. 11 Three modified bentonites, hydroxy-aluminum pillared bentonite (Al(OH)-Bent), cetyl trimethylammonium bromide modified bentonite (CTAB-Bent), and both cetyl trimethylammonium bromide and hydroxy-aluminum modified bentonite (Al(OH)-CTAB-Bent) were prepared and characterized by Fourier transform infrared spectroscopy (FTIR) analysis. Batch experiments were conducted on the adsorption of phenol at different temperatures, pH and initial concentration. The results indicated that adsorption capacity o... Autori: Xiping Luo ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27481
EXPERIMENTAL DESIGN FOR THE OPTIMIZATION OF COPPER BIOSORPTION BY IMMOBILIZED NANOSCALE Lentinus edodes
Environmental Engineering and Management Journal › Vol. 16 › Nr. 11 An experimental design methodology was applied to study the copper removal from aqueous solutions by immobilized nanoscale
Lentinus edodes. The effect of the various variables (biomass loading, initial metal ions concentration, PH, contact time, agitation
speed and temperature) were studied in the batch experiment. The results showed that pH, contact time and agitation speed were
the most significant variables on biosorption of copper ions determined by Minimum Run Equireplicated Res V Design... Autori: Rong Chen ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27487
OPTIMIZATION OF IMPORTANT PROCESS PARAMETERS FOR THE REMOVAL OF Cr(VI) BY A MODIFIED WASTE MATERIAL
Environmental Engineering and Management Journal › Vol. 16 › Nr. 12 This paper highlights the utility of rice husk ash for the adsorption of Cr(VI) ions from aqueous solutions. Rice husk ash (RHA) is produced when rice husk is burnt for various purposes. Application of Treated Rice Husk Ash (TRHA) as an adsorbent for the removal of Cr(VI) from aqueous solutions has been investigated. For this purpose, RHA was thermally treated. RHA and treated RHA (TRHA) were characterized by XRD, SEM and FTIR to investigate the effect of treatment on the nature and surface char... Autori: Varsha Srivastava ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27504
REMOVAL OF MULTILAN RED AND MULTI-ACTIVE BLUE DYES FROM AQUEOUS SOLUTION BY ADSORPTION AND OXIDATION TECHNIQUES: EQUILIBRIUM, KINETICS AND THERMODYNAMIC STUDIES
Environmental Engineering and Management Journal › Vol. 16 › Nr. 12 This study evaluated the performances of adsorption and Fenton oxidation for the removal of multilan red (MLR) and multi-active blue (MActB) dyes from aqueous solution. Zeolite, the adsorbent used in the study was modified using two surfactants: hexadecyltrimethylammonium bromide (HDTMA-Br) and cetyltrimethylammonium bromide (CTAB). The modified zeolite characterized using FTIR, SEM and XRD analysis. The modification studies revealed that HDTMA-modified zeolite exhibited better performance than ... Autori: Jacob Kitinya ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27505
INFLUENCE OF PROCESS VARIABLES ON ADSORPTION OF CONGO RED ONTO MANGO LEAF CHAR USING FACTORIAL DESIGN ANALYSIS
Environmental Engineering and Management Journal › Vol. 16 › Nr. 12 Influence of process variables like pH, adsorbent dosage (D), initial dye concentration (C0), particle size (S) and temperature (T) on adsorption of a direct dye on carbon derived from mango leaf were studied using a 25 factorial design. The main effects and interaction effects were determined using statistical methods. Maximum uptake obtained was 55.7 mg/g (pH = 2, T = 40 °C, D = 0.5 g/dm³, C0= 100 mg/dm³ and S = 53 μm). It was found that the effects of process variables namely... Autori: Varadarajan Gunasekar ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27506
REMOVAL OF DYES FROM WATER BY GALVANOCOAGULATION
Environmental Engineering and Management Journal › Vol. 17 › Nr. 1 Galvanocoagulation (GC) utilizing metallic iron chips and granular coke was studied as a potential technique for decolorization of dye-containing aqueous solutions. GC and chemical coagulation by inorganic metallic coagulants such as iron sulfates (Fe2+, Fe3+) were examined for the removal of individual dyes, used in the fur industry, from model aqueous solutions. The role of metal cations when progressively electrogenerated in situ was compared to when they are added simultaneously. The superio... Autori: Marina R. Sizykh ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27526
EVALUATION OF COPPER AND LEAD BIOSORPTION ON MODIFIED Azolla pinnata (R. Br.)
Environmental Engineering and Management Journal › Vol. 17 › Nr. 1 This paper investigates the macrophyte Azolla pinnata modified with sodium hydroxide, as a bioadsorbent for Cu2+ and Pb2+ ions in synthetic solutions. Biomaterial characterization was performed using Scanning Electronic Microscopy (SEM); Energy-
Dispersive X-Ray Spectroscopy (EDX); Fourier Transform Infra-red (FTIR) spectroscopy techniques and through the blocking of carboxylic and sulfonic functional groups. Kinetics of the process has highlighted a quick and efficient adsorption, even in low ... Autori: Arielle Barros ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27532
ADSORPTION CHARACTERISTICS OF Cr(VI) ON CARBONIZED Eupatorium adenophorum SPRENG
Environmental Engineering and Management Journal › Vol. 17 › Nr. 1 The potential use of a novel low-cost adsorbent, Eupatorium adenophorum Spreng, as a solution to remove Cr(VI) ions from aqueous was reported. Effects of various regulating parameters, such as pH value of reaction, adsorbent dosage and temperature, were investigated. To fit the adsorption equilibrium data, Langmuir isotherm and Freundlich isotherm were invoked. Additionally, thermodynamic parameters of the adsorption process, such as ΔG, ΔS and ΔH, were also calculated. The res... Autori: Chen Jin-fa ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27535
USING WASTE FOUNDRY SAND FOR THE REMOVAL OF MALACHITE GREEN DYE FROM AQUEOUS SOLUTIONS - KINETIC AND EQUILIBRIUM STUDIES
Environmental Engineering and Management Journal › Vol. 17 › Nr. 1 The aim of this study was to examine the adsorption of malachite green dye from aqueous solutions on the waste foundry sand. The effects of contact time, adsorbent amount, pH and initial dye concentration were investigated. The equilibrium adsorption data were analyzed by Langmuir, Freundlich and Temkin adsorption isotherm models. The adsorption capacity of waste foundry sand for the removal of malachite green dye was determined with the Langmuir and found to be 23.29 mg/g. The adsorption isothe... Autori: Elif Hatice Gürkan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27536
CASTOR LEAF POWDER AS A BIOSORBENT FOR Cu(II) REMOVAL AND PRECONCENTRATION OF NATURAL WATER SAMPLES
Environmental Engineering and Management Journal › Vol. 17 › Nr. 1 This paper describes the preparation and use of a low cost biosorbent made of castor leaves for the extraction of Cu(II) from an
aqueous medium. The biosorbent was characterized by Fourier transform infrared spectroscopy (FTIR), surface area and pore
diameter measurements. The results showed absorption bands of carboxylic and amide groups at 1738 and 1540 cm-1,
respectively, and the measured surface area was 1.3728 ± 0.0160 m2 g-1, with predominance of microporous < 10.51 Å.
... Autori: Milene S. Pereira ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27540
KINETICS AND EQUILIBRIUM STUDIES OF 4-CHLOROPHENOL ADSORPTION ONTO MAGNETIC ACTIVATED CARBON COMPOSITES
Environmental Engineering and Management Journal › Vol. 17 › Nr. 4 Among the organic pollutants, the chlorinated phenols represent an important class of compounds having a stable world market of ca. 100 kt per year. Due to their aryl structure and presence of the chlorine atom, chlorinated phenols are exceptionally recalcitrant toward chemical reactions aimed at their reduction. Adsorption from liquid phase has received special interest due to its flexibility and simplicity in operation. Especially adsorption using activated carbon (AC) has been recognized by t... Autori: Marius Sebastian Secula ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27552
Environmental engineering and Management Journal No. 4
› Vol. 1 › Nr. 11 • Environmental engineering and Management Journal No. 4
• AN ENHANCED ENVIRONMENTAL MULTIMEDIA MODELLING SYSTEM (FEMMS): PART II USER INTERFACE AND FIELD VALIDATION
• COST-EFFECTIVENESS OF OPTIMIZING CONCENTRATED FEED BLENDS TO DECREASE GREENHOUSE GAS EMISSIONS
• FATE AND BIODEGRADATION OF ESTROGENS IN THE ENVIRONMENT AND ENGINEERING SYSTEMS A REVIEW
• ANALYSIS OF THE MATERIAL COMPOSITION OF MIXED MUN... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27577
Environmental engineering and Management Journal No. 4
Environmental Engineering and Management Journal › Vol. 17 › Nr. 4 • Environmental engineering and Management Journal No. 4
• AN ENHANCED ENVIRONMENTAL MULTIMEDIA MODELLING SYSTEM (FEMMS): PART II USER INTERFACE AND FIELD VALIDATION
• COST-EFFECTIVENESS OF OPTIMIZING CONCENTRATED FEED BLENDS TO DECREASE GREENHOUSE GAS EMISSIONS
• FATE AND BIODEGRADATION OF ESTROGENS IN THE ENVIRONMENT AND ENGINEERING SYSTEMS A REVIEW
• ANALYSIS OF THE MATERIAL COMPOSITION OF MIXED MUN... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27576
POWDERED MARBLE WASTES REUSE FOR CADMIUM REMOVAL FROM AQUEOUS SOLUTIONS UNDER DYNAMIC CONDITIONS
Environmental Engineering and Management Journal › Vol. 17 › Nr. 5 A factorial design analysis was performed in order to determine the significant factors influencing cadmium removal from aqueous solutions by powdered marble wastes (PMW), using a continuous stirring tank reactor (CSTR) system. Investigated factors were initial cadmium aqueous concentration (5-30 mg L-1), PMW dosage (5-15 g L-1) and flow rate (20-40 mL min-1). Results showed that the cadmium aqueous concentration and PMW dosage were the most influencing factors on metal removal from synthetic aq... Autori: Ammar Mlayah ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27590
THERMODYNAMICS, KINETICS AND EQUILIBRIUM STUDIES OF URANIUM SORPTION BY Gracilaria corticata RED ALGA
Environmental Engineering and Management Journal › Vol. 17 › Nr. 5 In this research, the capability of uranium biosorption by dried biomass of the red algae was investigated in a batch system. For the screening of the most appropriate biosorbent, they were placed in 0.5 mmol/L uranium solution with different pH for 3hrs of contact times. The obtained results showed that the species of the Gracilaria corticata (J. Agardh) are having the maximum rate of the biosorption. Sorption equilibrium was reached within 3hrs of contact time (at pH 4.5), and the results of t... Autori: Reza Dabbagh ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27596
Pb (ΙΙ) REMOVAL FROM AQUEOUS SOLUTION BY ADSORPTION ON ACTIVATED CARBON FROM KIWI PEEL
Environmental Engineering and Management Journal › Vol. 17 › Nr. 6 A new low-cost activated carbon was developed from kiwi peel for removing Pb(II) from aqueous solution. The adsorbent characteristics were determined by different analyses such as BET, FTIR and SEM. The adsorbent demonstrated remarkable characteristics such as high surface area (306.18 m2.g-1) and large total pore volume (0.4810 cm3.g-1). The effect of pH, contact time, initial concentration, shaking rate and adsorbent dosage on the Pb removal efficiency was investigated. It was found that the o... Autori: Mostafa Rahimnejad ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27605
Environmental engineering and Management Journal No. 6
Environmental Engineering and Management Journal › Vol. 17 › Nr. 6 FLUCTUATION OF RIVER NETWORK WATER ENVIRONMENTAL CARRYING CAPACITY IN A COMPLICATED RIVER-LAKE SYSTEM
• MINERALOGY AND GEOCHEMICAL DISTRIBUTION OF HEAVY METALS FOR THE FAGUL CETĂȚII TAILINGS, ROMANIA
• ACCUMULATION AND AVAILABILITY OF TRACE ELEMENTS FROM SOIL INTO ORIENTAL TOBACCO GROWN IN MACEDONIA
• OLFACTORY EFFECT ON LANDSCAPE PREFERENCE
• EFFECT OF MOLASSES ADDITION AS BIODEGRADABLE MATERIAL ON PHENOL REMO... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27628
REMOVAL OF AQUEOUS Cu(II) WITH NATURAL KAOLIN: KINETICS AND EQUILIBRIUM STUDIES
Environmental Engineering and Management Journal › Vol. 17 › Nr. 2 Copper pollution is common across the world and has caused serious public health problems recently. Among the conventional methods, adsorption has proved effective, economic, versatile and simple for the removal of aqueous Cu(II) contaminants. Deposits of natural Kaolin are abundant around the world, and are regarded as valueless due to its limited usage in industry. In this study, the adsorption behavior of natural Kaolin towards Cu(II) was evaluated. According to the results, the isothermal ad... Autori: Qiang Tang ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27651
AN INVESTIGATION ON GREYWATER TREATMENT OPTIONS FOR REUSE: RANKING BY ANALYTIC HIERARCHY PROCESS
Environmental Engineering and Management Journal › Vol. 17 › Nr. 3 The objective of the present study was to (i) compare different treatment options for greywater (GW) reuse, (ii) assess
the potential of treated GW for reuse, and (iii) select the optimal treatment option by using Analytic Hierarchy Process
(AHP). Raw GW was settled for 2 h. Five different treatment options were investigated simultaneously in parallel
using the same influent (settled GW). The treatment options were (1) sand filtration, (2) sand/brick bat filtration, (3)
alum coagulation/floc... Autori: Dilip Machindra Ghaitidak ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27669
ADSORPTION BEHAVIOR OF GADOLINIUM(III) FROM AQUEOUS SOLUTION BY D418 RESIN
Environmental Engineering and Management Journal › Vol. 17 › Nr. 7 Adsorption, desorption, and kinetics behavior of Gd(III) ion on chelating resin were investigated in this paper. Batch adsorption studies were carried out with different pH, contact time, and temperature. The adsorption of Gd(III) follows the Langmuir model better than the Freundlich model. The apparent activation energy Ea and adsorption rate constant are k308 4.16 kJ/mol and 6.01×10-5 s-1, respectively. Thermodynamic parameters such as ΔH, ΔS and ΔG indicated that Gd(II... Autori: Leilei Pi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27688
REMOVAL OF HEXAVALENT CHROMIUM USING TWO INNOVATIVE ADSORBENTS
Environmental Engineering and Management Journal › Vol. 17 › Nr. 7 Hexavalent chromium Cr(VI), a constituent of wastewater from many industries, is regulated by the Environmental Protection Agency (EPA) as one of the priority pollutants. Adsorption is an important technique that can be used for Cr(VI) removal from wastewater. The challenge in adsorption techniques is to find a cheap, widely available adsorbent that has a high adsorption capacity to Cr(VI). Dates stones (DS) and palm fiber (PF) are two agricultural wastes that are produced from palm trees. These... Autori: Reda Abubeah ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27689
Environmental engineering and Management Journal No. 8
› Vol. 1 › Nr. 8 • INFLUENCING FACTORS OF THE ACCEPTABLE AMOUNT OF COMPENSATION OF FARMERS FOR CONTROLLING FERTILIZER-INDUCED WATER POLLUTION
• DETERMINATION OF THE RARE EARTH METALS IN THE RED MUD FOR POSSIBLE UTILIZATION
• Fe(II) AND Mn(II) REMOVAL FROM CONTAMINATED GROUNDWATER BY ADSORPTION: A COMPARISON OF ACTIVATED CARBON AND PINE BARK
• RESPONSE OF UPLAND COTTON GENOTYPES TO SALINITY AT EARLY GROWTH STAGES
• KINETICS AND ISOTH... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27782
Fe(II) AND Mn(II) REMOVAL FROM CONTAMINATED GROUNDWATER BY ADSORPTION: A COMPARISON OF ACTIVATED CARBON AND PINE BARK
Environmental Engineering and Management Journal › Vol. 17 › Nr. 8 This paper aims to compare the adsorption performance of activated carbon and pine bark for iron and manganese removal from contaminated groundwater. Moreover, their environmental compatibility was checked for their possible use as reactive media in a permeable reactive barrier for in situ remediation. Batch tests were carried out with different iron and manganese concentrations and different particle-size distributions, in order to evaluate the effectiveness of the activated carbon and pine bar... Autori: Silvia Sbaffoni ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27779
KINETICS AND ISOTHERM ANALYSIS OF Cd2+ REMOVAL FROM AQUEOUS SOLUTIONS BY ION EXCHANGE PROCESS
Environmental Engineering and Management Journal › Vol. 17 › Nr. 8 In the present study, Dowex HCR-S/H, cationic resin was used as a resin for the removal of cadmium from aqueous solutions.
The experiments were carried out in a batch vessel. Subsequent experiments were performed as a function of initial solution pH,
resin dosage, agitation time, initial Cd2+ concentration, solution temperature and agitation speed. Ion exchange rate increased
with the increase in initial cadmium concentration, stirring speed and temperature. The Langmuir, Freundlich, Elovich,... Autori: Baybars Ali Fil ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27777
HEXAVALENT CHROMIUM ADSORPTION CAPABILITY ONTO CARBON BLACK: KINETIC AND THERMODYNAMIC ASPECTS
Environmental Engineering and Management Journal › Vol. 17 › Nr. 8 The adsorption rate and dynamic behavior of the system are important factors as regards the process design and operational control. The aim of this study was to find a suitable kinetic model for the hexavalent chromium removal in a batch reactor. The experimental data were analyzed using four adsorption kinetic models: the pseudo- first and second order equations, the Elovich equation, and the intraparticle diffusion equation, so as to determine the best fit equation of the Cr(VI) adsorption ont... Autori: Ankica Radjenovic ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27773
HIGHLY EFFICIENT REMOVAL OF CADMIUM FROM AQUEOUS SOLUTION USING POLYMER-STABILIZED ZERO-VALENT IRON NANOPARTICLES: EQUILIBRIUM, KINETIC AND THERMODYNAMIC STUDIES
Environmental Engineering and Management Journal › Vol. 17 › Nr. 8 Bare zero-valent iron nanoparticles (bare-ZVIN) have a great tendency to aggregate, which drops their reactivity with pollutants. To address this issue, polyvinylpyrrolidone stabilized-ZVIN (PVP-ZVIN) was synthesized and used for the removal of Cd2+ from aqueous solution in a batch system. The effects of operation conditions such as the pH of aqueous solution (2-8), reaction time (0-120), adsorbent concentration (1-6 g L-1) and the initial Cd2+ concentration (10-60 mg L-1) on the removal efficie... Autori: Amirhosein Ramazanpour Esfahani ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27764
Environmental engineering and Management Journal No. 8
› Vol. 1 › Nr. 4 • INFLUENCING FACTORS OF THE ACCEPTABLE AMOUNT OF COMPENSATION OF FARMERS FOR CONTROLLING FERTILIZER-INDUCED WATER POLLUTION
• DETERMINATION OF THE RARE EARTH METALS IN THE RED MUD FOR POSSIBLE UTILIZATION
• Fe(II) AND Mn(II) REMOVAL FROM CONTAMINATED GROUNDWATER BY ADSORPTION: A COMPARISON OF ACTIVATED CARBON AND PINE BARK
• RESPONSE OF UPLAND COTTON GENOTYPES TO SALINITY AT EARLY GROWTH STAGES
• KINETICS AND ISOTH... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27729
Environmental engineering and Management Journal No. 8
› Vol. 1 › Nr. 4 • INFLUENCING FACTORS OF THE ACCEPTABLE AMOUNT OF COMPENSATION OF FARMERS FOR CONTROLLING FERTILIZER-INDUCED WATER POLLUTION
• DETERMINATION OF THE RARE EARTH METALS IN THE RED MUD FOR POSSIBLE UTILIZATION
• Fe(II) AND Mn(II) REMOVAL FROM CONTAMINATED GROUNDWATER BY ADSORPTION: A COMPARISON OF ACTIVATED CARBON AND PINE BARK
• RESPONSE OF UPLAND COTTON GENOTYPES TO SALINITY AT EARLY GROWTH STAGES
• KINETICS AND ISOTH... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27730
REMOVAL OF COPPER FROM INDUSTRIAL WASTEWATER USING MANGANESE FERRITE NANOPARTICLES: EVALUATION OF EQUILIBRIUM AND KINETIC MODEL
Environmental Engineering and Management Journal › Vol. 17 › Nr. 9 In this study, the removal of Cu(II) from real industrial wastewater, being taken from galvanotechnic industry, by means of manganese ferrite (MnFe2O4) nanoparticles (NPs) was investigated. The effects of pH, adsorbent dosage, and contact time on Cu(II) removal from wastewater were monitored using the real wastewater while the effect of initial concentration was studied on synthetic aqueous solutions. Optimal conditions were found for copper removal in this study. Cu(II) removal and adsorption c... Autori: Naim Sezgin ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27743
EFFECT OF PARTICLES SIZE OF CRT GLASS WASTE ON PROPERTIES OF POLYMER CONCRETES
Environmental Engineering and Management Journal › Vol. 17 › Nr. 10 The research has been focused on concretes in which the continuous phase is some kind of polymeric resin and the discrete phase is some type of mineral aggregate. Such composite materials are known as Polymer concretes (PC) and boast several advantages such as lower weights, higher resistance to corrosive environments and chemical attacks, faster curing and lower permeabilities. In PC the inorganic fraction can reach up to 90% of the total and is made up of aggregates such as sand and gravel. Th... Autori: Paolo Pozzi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27799
ACID EXTRACT OF ALOE VERA AS INHIBITOR FOR THE CORROSION OF MILD STEEL IN ACIDIC MEDIA
Environmental Engineering and Management Journal › Vol. 17 › Nr. 12 The corrosion inhibition of mild steel in acidic media at 303 – 333K in 0.1 - 0.5M acids (hydrochloric acid - HCl and trioxonitrate (v) acid - HNO3) and 0.01-0.03g/L Aloe Vera extract (AVE) were investigated by standard weight loss method. The corrosion rate was calculated in the absence and presence of the inhibitors. The inhibition efficiencies of AVE in both acid media increased with increase in concentration and decreased with increase in temperature and period of immersion. Results sh... Autori: Maureen Ndibe ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27870
TREATMENT OF FORGING INDUSTRY WASTEWATER USING NON-HYBRID AND HYBRID PROCESSES
Environmental Engineering and Management Journal › Vol. 17 › Nr. 11 In this study, five distinctive separation processes namely sand filtration (SF), adsorption, microfiltration (MF), ultrafiltration (UF) and nanofiltration (NF) were examined in two ways for the treatment of forging industry wastewater. At first, each process was examined separately, and then they were applied in association with each other as hybrid processes including pretreatment, main treatment, and post-treatment. The results related to non-hybrid experiments show that none of the mentioned... Autori: Reza Aminzadeh ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27847
ASSESSMENT OF KINETICS, EQUILIBRIUM AND THERMODYNAMICS OF BLACK KROM KJR DYE ADSORPTION ONTO AQUATIC MACROPHYTE Pistia stratiote
Environmental Engineering and Management Journal › Vol. 17 › Nr. 11 The macrophyte Pistia stratiote was used as biosorbent for the removal of Black Krom KJR (BK-KJR) dye in synthetic aqueous
solution. Initially, some tests were performed to verify the best operational conditions such as pH, biosorbent particle size, sorption
temperature and stirring speed, which were later used in the kinetic and equilibrium tests. All tests were performed in duplicate. The
highest removal rates of the pollutant were achieved at the process conditions of initial pH 2, granulo... Autori: Aparecido Nivaldo Módenes ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27843
EFFECT OF SYNTHESIS PARAMETERS ON SORPTIVE PROPERTIES OF GLYCEROL-DERIVED MESOPOROUS CARBON
Environmental Engineering and Management Journal › Vol. 18 › Nr. 1 The effect of synthesis conditions on sorptive properties of glycerol-derived mesoporous carbon materials were studied. Sorption
properties of the synthesized carbon-based materials regarding to different adsorbate molecules, as well as water vapors, phenol
and methylene blue molecules were analyzed. The sorption capacity of the synthesized mesoporous carbons depends upon synthesis
conditions, namely upon pyrolyzing temperature and carbon precursor to silica weight ratio, being determined by ... Autori: Maria Ignat ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27880
A REVIEW ON OCCURRENCE, MEASUREMENT, TOXICITY AND TANNIN REMOVAL PROCESSES FROM WASTEWATERS
Environmental Engineering and Management Journal › Vol. 18 › Nr. 1 A wide range and globally active agro-industries such as olive oil processing, winery, tannery, textile and food production discharge
a large volume of wastewater containing tannins. Tannins are complex structured chemicals which cause high organic content,
requiring high dissolved oxygen in wastewater treatment plants or producing oxygen depletion in the aquatic environment. Tannins
are known to be hardly degraded in biological treatment. There has been evidence that the presence of natural ... Autori: Giusy Lofrano ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27885
ADSORPTION OF AN ANIONIC DYE ONTO NATIVE AND CHEMICALLY MODIFIED AGRICULTURAL WASTE
Environmental Engineering and Management Journal › Vol. 18 › Nr. 1 The native and surface modified adsorbents from agricultural waste, such as Psyllium stalks (PS) were investigated for their ability
to remove the Coomassie Brilliant Blue (CBB) dye from aqueous media. The native and surface modified adsorbents were
characterized by the Fourier Transform Infrared spectroscopy (FTIR). The results show that the Sodium Bicarbonate Treated
Carbon (SBTC) has good surface properties for the removal of the CBB dye from aqueous media. The SBTC was analyzed by
Scanni... Autori: Premkumar Manickam Periyaraman ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27898
REMOVAL OF Zn(II) IONS FROM AQUEOUS SOLUTION BY SORPTION USING CELLULOSE FUNCTIONALIZED WITH REACTIVE DYES AS SORBENT
Environmental Engineering and Management Journal › Vol. 18 › Nr. 2 The influence of initial metal ion concentration and temperature on the adsorption of Zn(II) from aqueous solution onto amino
ethyl cellulose (AEC) functionalized with Orange 16 reactive dye, was examined. Batch experiments were performed at pH of 4.0
and adsorbent dose of 8.0 g/L previously established as optimum, ranging the initial Zn(II) concentration between 22.74-181.92
mg/L and temperature between 2 and 60 C. Three isotherm models (Langmuir, Freundlich and Dubinin – Radus... Autori: Gabriela Nacu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27904
MODELLING HIGH RATE P-REMOVAL IN A TWO-STAGE PILOT SCALE ALUM SLUDGE BASED CONSTRUCTED WETLAND SYSTEM
Environmental Engineering and Management Journal › Vol. 18 › Nr. 2 A system dynamics (SD) process-based simulation model was developed using an object-oriented environment to simulate
phosphorus (P) transformations in a two-stage pilot scale Dewatered Alum Sludge Cake (DASC) based Constructed Wetlands
(CW), which is operated from February 2009 to January 2010 to treat relatively high concentration animal farm wastewater.
Structural Thinking Experiential Learning Laboratory and Animation (STELLA v9.1.4) conceived on the principles of SD was
used for the deve... Autori: Lordwin Jeyakumar ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27907
COPPER(II) BIOSORPTION CHARACTERISTICS OF LYOPHILIZED AND THERMALLY TREATED Pseudomonas CELLS
Environmental Engineering and Management Journal › Vol. 18 › Nr. 2 Biosorption of copper(II) by lyophilized and thermally treated bacterial biomass of Pseudomonas aeruginosa PAO1 and
Pseudomonas fluorescens BME in aqueous suspension was studied. The cell surface properties were characterized and the
experimental conditions, e.g., pH, adsorption time, and initial metal concentration were optimized for efficient biosorption. The
surface charge was negative at pH above 2.5 for P. aeruginosa, and above pH 4 for P. fluorescens. The highest copper(II) uptake
was ... Autori: Anikó Kőnig-Péter ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27917
COMPUTATIONAL SIMULATION MODEL FOR DYE ADSORPTION IN NANO TIO2 FILM FOR THE APPLICATIONS IN DYE SENSITIZED SOLAR CELLS
Environmental Engineering and Management Journal › Vol. 18 › Nr. 3 The theoretical and computational studies of dye sensitized solar cells (DSSCs) can contribute to a deeper understanding of these
types of solar cells. The DSSCs are the novel design of solar cells which could be used as power producing windows or skylights.
They represent a particular promising approach to a direct conversion of sunlight into electrical energy at low cost and with high
efficiency. The light adsorption occurs in dye molecules adsorbed on a highly porous structure of TiO2 film... Autori: Nnditshedzeni Eric Maluta ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27932
EFFICIENT REMOVAL OF HEAVY METALS BY KOH ACTIVATED Diplotaxis harra BIOMASS: EXPERIMENTAL DESIGN OPTIMIZATION
Environmental Engineering and Management Journal › Vol. 18 › Nr. 3 The aim of this study was to produce high quality activated carbons from Diplotaxis harra biomass by potassium hydroxide
activation and their application in heavy metals removal. To reduce the number of experiments, full factorial experimental design
at two levels (24) was carried out to occur optimal preparation conditions for efficient removal of cadmium and cobalt ions from
aqueous solutions. Different variables influencing activation process, such as carbonization temperature (500–6... Autori: Hanane Tounsadi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27934
ADSORPTION OF PHENOL ON ADSORBENTS PRODUCED FROM COCONUT TREE WASTE: KINETIC AND EQUILIBRIUM STUDIES
Environmental Engineering and Management Journal › Vol. 18 › Nr. 3 Agro-industrial waste are seen as potential precursors in the development of adsorbents for the removal of phenolic compounds,
which exhibit a harmful effect to human health due to their high toxicity. This work evaluated the use of coal prepared from coconut
tree agro-industrial waste, for the adsorption of phenol in aqueous solutions. Three coal samples were prepared as follows:
carbonized only (Cb), activated with synthetic air (Cair) and activated with CO2 (CCO2). Based on the results of ... Autori: Marta Duarte ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27937
Environmental engineering and Management Journal No. 3
› Vol. 14 › Nr. 4 • ENVIRONMENTAL CHANGES IN NORTH-EASTERN ROMANIA A TRIGGER FACTOR FOR LYME DISEASE
• HYDROGEOCHEMISTRY AND ENVIRONMENTAL ISOTOPE COMPOSITIONS AND THEIR EVOLUTION IN GEOTHERMAL GROUNDWATER IN YIZHANG, HUNAN PROVINCE, CHINA
• CONSTRUCTION OF A BIOGAS HEAT STORAGE GREENHOUSE ECOSYSTEM UNDER THE CONTEXT OF WATER POLLUTION RESULTING FROM LIVESTOCK BREEDING
• ENVIRONMENTAL NOISE: HEALTH AND POLICY - AN UP TO DATE MINIREVIEW &nb... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27946
Environmental engineering and Management Journal No. 3
› Vol. 14 › Nr. 4 • ENVIRONMENTAL CHANGES IN NORTH-EASTERN ROMANIA A TRIGGER FACTOR FOR LYME DISEASE
• HYDROGEOCHEMISTRY AND ENVIRONMENTAL ISOTOPE COMPOSITIONS AND THEIR EVOLUTION IN GEOTHERMAL GROUNDWATER IN YIZHANG, HUNAN PROVINCE, CHINA
• CONSTRUCTION OF A BIOGAS HEAT STORAGE GREENHOUSE ECOSYSTEM UNDER THE CONTEXT OF WATER POLLUTION RESULTING FROM LIVESTOCK BREEDING
• ENVIRONMENTAL NOISE: HEALTH AND POLICY - AN UP TO DATE MINIREVIEW &nb... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27947
Environmental engineering and Management Journal No. 3
› Vol. 14 › Nr. 6 • ENVIRONMENTAL CHANGES IN NORTH-EASTERN ROMANIA A TRIGGER FACTOR FOR LYME DISEASE
• HYDROGEOCHEMISTRY AND ENVIRONMENTAL ISOTOPE COMPOSITIONS AND THEIR EVOLUTION IN GEOTHERMAL GROUNDWATER IN YIZHANG, HUNAN PROVINCE, CHINA
• CONSTRUCTION OF A BIOGAS HEAT STORAGE GREENHOUSE ECOSYSTEM UNDER THE CONTEXT OF WATER POLLUTION RESULTING FROM LIVESTOCK BREEDING
• ENVIRONMENTAL NOISE: HEALTH AND POLICY - AN UP TO DATE MINIREVIEW &nb... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27968
PHOTOCATALYTIC DEGRADATION OF ATRAZINE USING ZINC OXIDE TEXTURALLY MODIFIED WITH STICKY RICE STARCH TEMPLATE AND DOPED WITH TRANSITION METALS
Environmental Engineering and Management Journal › Vol. 17 › Nr. 12 Atrazine is a herbicide used widely with a large quantity in Thailand and can contaminate in surface and groundwater. This work investigated atrazine removal from an aqueous solution by catalytic photodegradation using oxides of metal-cerium-zinc (M-Ce-ZnO, M = Ag, Fe, and Cu). ZnO is texturally modified with sticky rice starch template, doped with cerium (Ce) and either Ag, Fe, or Cu with the M:Ce:Zn molar ratio of 0.005:0.005:1. The catalysts were characterized by XRD, UV-Vis-DRS, and N2 adsor... Autori: Pummarin Khamdahsag ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27974
EQUILIBRIUM AND KINETIC STUDIES OF METHYL ORANGE ADSORPTION ONTO CHEMICALLY TREATED OIL PALM TRUNK POWDER
Environmental Engineering and Management Journal › Vol. 17 › Nr. 12 In the present work, acid treated natural oil palm trunk powder (OPTP) has been utilized as novel adsorbents for the removal of methyl orange (MO) from aqueous solution. The batch method was employed to study the adsorption behavior of MO which was subsequently determined by UV/Visible spectrophotometer. The adsorption characteristics and operational parameters were determined by monitoring different parameters such as pH, contact time, dye concentration and temperature. The acid treated OPTP an... Autori: Akil Ahmad ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27975
COLOR REMOVAL FROM PULP MILL EFFLUENT USING COAL ASH PRODUCED FROM GEORGIA COAL COMBUSTION PLANTS
Environmental Engineering and Management Journal › Vol. 18 › Nr. 5 In this study, Coal Fly Ash (CFA), a byproduct of coal combustion power plants, was used as an adsorbent to remove color from
locally-obtained pulp mill effluent (PME). Batch adsorption studies were conducted to determine the adsorption parameters that
would result in the maximum color removal from PME at the lowest CFA dosage and process cost. The effects of operating
variables on color removal were studied by varying: 1) CFA dosage, 2) initial PME pH, and 3) contact time. The findings indic... Autori: Christopher Willett ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27986
HYDROCARBON REMOVAL FROM DIESEL-CONTAMINATED SOIL THROUGH REUSED ACTIVATED CARBON ADSORPTION
Environmental Engineering and Management Journal › Vol. 18 › Nr. 9 Hydrocarbon spillages are an increasing problem in Mexico, which has left large areas of contaminated land that entail negative effects on environmental, economical and social aspects. Such soil contamination demands fast, efficient and cost-competitive remediation technologies. This work explores activated carbon (AC) adsorption as a fast soil treatment to lower hydrocarbon concentrations in a contaminated soil from Puebla, Mexico, reusing an AC residue for such purpose. Both, semi-wasted AC an... Autori: Sandra Arroyo ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28055
URBAN HEAT ISLAND EFFECT OF CHENGGONG DISTRICT IN KUNMING, CHINA
Environmental Engineering and Management Journal › Vol. 18 › Nr. 7 This paper measures the temperatures along a test route through Chenggong District, Kunming, by mobile measurement, and revises
the measured data to 4 different time points of the test period, aiming to enhance the data utilization efficiency. The modified data
were plotted into isotherm slices at the four time points, and the urban heat island (UHI) features, as well as its influencing factors
were analysed on geographic information system (GIS) software. The results of the measurements show... Autori: Bai Yufu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28044
TECHNOLOGIES FOR THE CONTROL OF EMERGING CONTAMINANTS IN DRINKING WATER TREATMENT PLANTS
Environmental Engineering and Management Journal › Vol. 18 › Nr. 10 In recent years, so-called emerging contaminants (ECs) have attracted growing interest as they have been detected in reservoirs and even in drinking water. The new proposal Drinking Water Directive (2018) provides for the introduction of new parameters relevant to the ECs category. As these contaminants today tend to be present in a growing number of water sources, provide treatment systems that ensure compliance with regulatory limits and the protection of public health has become essential. Th... Autori: Sabrina Sorlini ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28081
INTEGRATING ULTRASOUND WITH ACTIVATED CARBON PREPARED FROM MANGOSTEEN FRUIT PEEL FOR REACTIVE BLACK 5 REMOVAL
Environmental Engineering and Management Journal › Vol. 18 › Nr. 11 In this study, the effectiveness of integrating ultrasound with mangosteen fruit peel activated carbon (MFPAC) for the removal of reactive black 5 (RB5) dye was investigated. MFPAC prepared by the potassium carbonate activation method was characterized using BET, SEM and FTIR. The effects of ultrasound power, contact time, pH and adsorbent quantity on the removal of RB5 were
examined. Obtained results indicate that the MFPAC has a higher removal efficiency with ultrasound integration and can re... Autori: Randeep Singh ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28093
ADSORPTION OF Fe, Mn AND Cd IN CARBONATE-RICH CLAYEY SOILS AND ASSESSMENT OF ENVIRONMENTAL EFFECTS
Environmental Engineering and Management Journal › Vol. 18 › Nr. 12 Aim of the study is to determine Fe, Mn and Cd adsorption in the carbonate-rich clayey soils and to assess their environmental impacts. Soil samples represented a carbonate-rich clayey soil (Isaoren), carbonate-rich soil (Maşuk) and clayey soil (Aşık) was obtained from three different villages in Sanliurfa, southeast of Turkey. Adsorption studies were carried out with batch method. The maximum Fe, Mn and Cd adsorption was found on Isaoren, Maşuk and Aşık soils with ... Autori: Ayse Dilek Atasoy ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28116
FORMULATION OF COMPOSITE BEADS ALGINATE/HYDROXIDE SLUDGE FOR THE REMOVAL OF DYES FROM AQUEOUS SOLUTIONS
Environmental Engineering and Management Journal › Vol. 18 › Nr. 12 To produce drinking water, the water treatment plants generate huge quantities of sludge, this sludge is a waste and they are evacuated to the dump. The valuation of these sludge will be benific This study focuses on the development of composite alginates beads and sludge activated chemically by sulphuric acid and thermally for the removal of dyes from aqueous solutions. Two dyes were studied; a basic cationic dye (methylene blue) and an acidic anionic dye (Congo red) to compare the adsorption m... Autori: Hasna Elmontassir ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28125
STUDY OF BATCH ADSORPTION OF URANIUM IONS BY MCM-48 MATERIALS SYNTHESIZED AT ROOM TEMPERATURE
Environmental Engineering and Management Journal › Vol. 19 › Nr. 1 The mesoporous MCM-48 was synthesized at room temperature with different templates such as hexadecytrimethylammonium bromide
(C16TABr), hexadecytrimethylammonium chloride (C16TACl) and dodecyltrimethlammonium chloride (C12TACl). The obtained
materials were characterized by XRD, N2 adsorption/desorption, FTIR and SEM techniques, and their performance as uranium adsorbent
were investigated. In this framework, the effect of contact time, pH of solution, initial uranium concentration and temperat... Autori: Meriem Chabane Sari ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28131
OIL REMOVAL FROM REFINERY WASTEWATER THROUGH ADSORPTION ON LOW COST NATURAL BIOSORBENTS
Environmental Engineering and Management Journal › Vol. 19 › Nr. 1 The performance, in terms of sorption properties, of the two natural sorbents were compared with the commercial synthetic sorbent Fibroil. The experiments were conducted using two continuous setups of filtration under dynamic conditions. Experimental results revealed that the removal of chemical oxygen demand (COD) was 89%, 87% and 37% for Fibroil, Schoenoplectus lacustris and
Acorus calamus respectively in a down-flow filtration, while with the up-flow filtration the removal efficacy of COD wa... Autori: Zineb Chaouki ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28141
A BIOCHAR-BASED POINT-OF-USE WATER TREATMENT SYSTME FOR THE REMOVAL OF FLUORIDE; CHROMIUM AND BRILLIANT BLUE DYE IN TERNARY SYSTEMS
› › Nr. 1
MACROSPHERICAL POROUS METALLOSILICATE MATERIALS: CHARACTERIZATION AND APPLICATIONS
Environmental Engineering and Management Journal › Vol. 19 › Nr. 2 The main goal of this work was to develop a cheap and easy method for the synthesis of the porous metallosilicate macrospheres. Zirconium silicate macrospheres with diameters in the range 1.5 – 1.6 mm were obtained by the spray gelling technique, using the multi templating method. Tetraethyl orthosilicate was used as silica source. The chitosan played a dual role (pore and shape generating agent), while other inexpensive and easily accessible biomaterials including yeast, sugar and gelatin... Autori: Emil Ioan MureÈ™an ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28148
MODELING OF A RECTANGULAR CHANNEL MONOLITH REACTOR FOR SORPTION-ENHANCED WATER-GAS SHIFT
Environmental Engineering and Management Journal › Vol. 19 › Nr. 2 As CO2 concentration levels in the atmosphere are steadily reaching a point of no return, it is paramount that actions are taken towards mitigating emissions by improving the efficiency of existing processes. Sorption-enhanced water-gas shift (SEWGS) combines the water-gas shift reaction with in-situ adsorption of CO2 on potassium-promoted hydrotalcite (K-HTC). This enables a
direct conversion of syngas into separate hot streams of H2 at feed pressure and CO2 at regeneration pressure, making th... Autori: Vlad-Cristian Sandu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28149
COMPARATIVE STUDIES REGARDING MOLYBDATE ADSORPTION ONTO MgnFe LAYERED DOUBLE HYDROXIDES OBTAINED FROM REAGENT AND WASTE SLUDGE
Environmental Engineering and Management Journal › Vol. 19 › Nr. 2 Molybdate anions are used in a lot of fields and represent an essential trace element for plant and animal life; however, excessive amounts can cause adverse effect on various organism and environment. Therefore, in the present paper the adsorption performance of MgnFe- layered double hydroxides in the removal process of molybdate from aqueous solutions was studied. The layered double hydroxide (LDH) was synthesized by co-precipitation at low oversaturation method. Different ratio between Mg and... Autori: Alin Golban ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28152
CONGO RED REMOVAL FROM AQUEOUS EFFLUENTS BY ADSORPTION ON CHERRY STONES ACTIVATED CARBON
Environmental Engineering and Management Journal › Vol. 19 › Nr. 2 Soluble dyes are intensively used in various industrial activities. They represent an important class of water pollutants from which they are rather difficult to remove. This paper focusses on the elimination of Congo Red (CR) ionic azo dye by adsorption on a low cost material. Cherry stones were used for activated carbon preparation by carbonization method. A temperature of 600 °C and a time of 4 h were found as adequate parameters for the physical activation and led to a final white powder... Autori: Cristina-Gabriela Grigoraș ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28153
FIXED-BED-COLUMN STUDIES FOR METHYLENE BLUE REMOVAL BY CELLULOSE CELLETS
Environmental Engineering and Management Journal › Vol. 19 › Nr. 2 The Cellets product represents a cellulose material, which combines different properties such as the perfect sphericity, fine particle size distribution, low friability and solubility, and inertness. The experiments were carried out with Cellets 200 granulated celluloses used as a filling material for a laboratory glass column, using diluted dye solution (9-10 mg of dye /L of solution) at adequate initial pH (4.7). The effect of flow rate was investigated, and the modeling of experimental data f... Autori: Iulia Nica ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28155
REMOVAL OF METHYL ORANGE AND CADMIUM FROM SOLUTION USING MODIFIED ACTIVATED CHARCOAL
Environmental Engineering and Management Journal › Vol. 19 › Nr. 2 In this work, the removal of methyl orange (MO) and Cd2+ by simultaneous adsorption on adsorbent obtained from modified charcoal (BCBH) coated with TiO2 has been studied. The synthesized materials obtained from wood branches were characterized using atomic force microscopy (AFM) for the roughness and SEM to determine the morphology of the surface. EDX spectroscopy indicates the presence of C, N, O, Na, K, P and Ti on the surface of the adsorbent materials. The micro-porosity and BET specific sur... Autori: Nicoleta Popa ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28157
AGRI-WASTES AS A LOW-COST ADSORBENT FOR NICOSULFURON HERBICIDE
Environmental Engineering and Management Journal › Vol. 19 › Nr. 2 The contamination of aquatic and terrestrial environments by pesticides is highlighted by their possible toxic properties and poor biodegradability on the environment. The development of low cost by products from agricultural sectors as a suitable solution for contaminated areas remediation is of great environmental interest. Straw wastes can be considered as a promising alternative to remove different chemical compound that are environmentally toxic.
In this study, some materials derived from ... Autori: Irina Gabriela Cara ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28161
STUDY OF HEAVY METAL DYNAMICS IN SOIL
Environmental Engineering and Management Journal › Vol. 19 › Nr. 2 The paper covers the results of a study, carried out during 2005 and 2018, regarding the impact of sludge dump of a wastewater treatment plant from Iasi city, Romania, on the soil characteristics. Experimental research was conducted to highlight the evolution of the heavy metal content of both the material in the storage site and the soil in its proximity. The following heavy metal concentrations were analyzed with atomic adsorption spectrometry method: Zn, Ni, Cr, Pb, Co, Cu and Cd. Research ha... Autori: Georgiana Cezarina Bartic Lazăr ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28164
METALLURGICAL WASTE VALORIZATION FOR FABRICATING GLASS-CERAMICS MATERIALS
Environmental Engineering and Management Journal › Vol. 19 › Nr. 3 The valorization of a metallurgical waste (i.e., an iron-rich slag) as raw material for the fabrication of high hardness glass-ceramics using differential thermal analysis, X-ray diffraction, X-ray fluorescence and scanning electron microscopy was investigated. The melting of the slag was aided by the addition of waste glass cullet (WGC) and the vitrification field of this system was investigated. The non-isothermal crystallization kinetics of the parent glass with the highest slag content was s... Autori: Erika Iveth Cedillo-González ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28168
ZINC HYDROXIDE NANOPARTICLES-MODIFIED CLAY FOR ULTRASOUND-ASSISTED REMOVAL OF METHYLENE BLUE
Environmental Engineering and Management Journal › Vol. 19 › Nr. 3 The objective of the present work was to introduce a novel adsorbent with high adsorption potential toward methylene blue by decorating montmorillonite clay (MMT clay) with Zn(OH)2–nanoparticles (Zn(OH)2–NPs). The adsorbent was characterized structurally by FE-SEM and FTIR techniques. Central composite design–response surface methodology was applied to optimize experimental variables including adsorbent dosage, pH, initial MB concentration, NaCl concentration, and sonication ti... Autori: Adel Valipour ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28173
FIXED-BED COLUMN STUDY OF DIAZINON ADSORPTION ON THE CROSS-LINKED CHITOSAN/CARBON NANOTUBE
Environmental Engineering and Management Journal › Vol. 19 › Nr. 3 Adsorption of diazinon from aqueous solution was studied by using cross-linked Chitosan/Carbon Nanotube (CHN-CNT) in a fixed-bed column. The cross linked CHN-CNT with 2.5% of MWCNT was prepared with a protected crosslinking method. The effects of the initial concentration of diazinon, bed-height, and flow rate on the adsorption of diazinon onto the cross linked CHN-CNT were investigated. The highest bed capacity of 29.47 mg/g was obtained at the initial concentration of 50 mg/L, flow rate of 10.... Autori: Tahere Taghizade Firozjaee ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28174
EVALUATION OF MODIFIED FLY ASH BASED NAA-ZEOLITE: EFFECT OF CRYSTALLINITY ON CO2 ADSORPTION CAPACITY
Environmental Engineering and Management Journal › Vol. 19 › Nr. 3 NaA zeolite was successfully synthesised from fly ash through hydrothermal process. The synthesised NaA zeolite was modified with Li+, Ca2+ and Mg2+ through ion exchange at a temperature of 60 °C and contact times of 1 h and 4 h. In this study the crystallinity of the synthesised NaA as well as its modified (LiA, CaA and MgA) was evaluated towards CO2 adsorption capacity using temperature programmed desorption (TPD) process at low temperature (40-150°C) and high temperature (150-700°... Autori: Muvumbu Jean-Luc Mukaba ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28175
PERFORMANCE INVESTIGATION OF FURNACE BOTTOM ASH AS A FILTER MEDIA FOR PHOSPHATE REMOVAL
Environmental Engineering and Management Journal › Vol. 19 › Nr. 4 This study investigates the capability of furnace bottom ash (FBA) as a filter media for phosphorus removal from wastewater
effluents. Lab-scale studies were conducted, in which a mass of FBA was brought into contact with the phosphate solution (a
predominant form of phosphorus in wastewater) in batch experiments and lab-scale filter. Intraparticle Diffusion Model (IPD) was
applied and revealed that the mechanism of phosphate adsorption onto FBA consist of three phases; film phase occurred in... Autori: Ali Alzeyadi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28191
CHARACTERIZATION AND PERFORMANCE OF POLYMER COMPOSITE MEMBRANES FOR THE REMOVAL OF HUMIC SUBSTANCES FROM WATER
Environmental Engineering and Management Journal › Vol. 19 › Nr. 5 This present study, investigates the performance of activated sardine scale powder (ASSP)/ Cellulose acetate (CA)/Polyvinylpyrrolidone (PVP) and powdered activated carbon (PAC)/ Cellulose acetate (CA) / Polyvinylpyrrolidone (PVP) composites membranes prepared by phase inversion for the elimination of humic substances (HS) from aqueous solutions. The materials and composites membranes were characterized by FTIR, XRD, SEM analyses. Overall, the results exhibit the higher performance of ASSP /CA/ P... Autori: Naziha Sid-Sahtout ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28199
SYNERGISTIC EFFECT OF FUEL AGENTS AND MASS RATIO FOR MORPHO-STRUCTURAL OPTIMIZATION OF MAGNETIC CLAYBASED NANOCOMPOSITES WITH HIGH ADSORPTION CAPACITY
Environmental Engineering and Management Journal › Vol. 19 › Nr. 5 The study is focused on creating magnetic mesoporous materials through the insertion of a nickel ferrite into the structure of kaolintype clay. Sol-gel auto-combustion method was employed to synthesize the materials, using glycine and tartaric acid as chelating/combustion agents. This is the first study on the combined effect of different fuel agents and of clay-to-ferrite molar ratio
on the structural, textural, magnetic and adsorptive properties of nanocomposites. The value of the average por... Autori: Stefana Cojocaru ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28210
SUGARCANE BAGASSE BIOMASS APPLIED TO THE ADSORPTION OF REACTIVE BLUE BB DYE
Environmental Engineering and Management Journal › Vol. 19 › Nr. 6 The textile industry has been contributing to the generation of wastewater containing dyes during the dyeing process. In this sector,
Reactive Blue BB is a dye used on a large scale. One method widely applied to dyes wastewater treatment is adsorption. This
technique is inexpensive since it can apply industrial by-products as adsorbents. In this work, the adsorption of Reactive Blue BB
dye by the sugarcane bagasse, a by-product from the sugar and alcohol industry, was evaluated in batch syste... Autori: Handria Hariane Piffer ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28226
FAST REMOVAL OF MALACHITE GREEN FROM AQUEOUS SOLUTIONS USING HIGHLY HYDROPHOBIC WATER‒DISPERSIBLE MAGNETIC NANOCOMPOSITE
Environmental Engineering and Management Journal › Vol. 19 › Nr. 7 Release of dyes without performing adequate treatment into the water can lead to environmental risk and serious health problems. The development of effective and economic adsorbent materials for the removal of dyes from industrial wastewaters has gained great consideration in recent years. In the present study, a novel bio-based nanocomposite has been developed for ultrasoundassisted
adsorption of malachite green (MG) from aqueous solutions. The synthesized adsorbent consisting of both hydropho... Autori: Mohsen Nekoeinia ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28232
ISOTHERMAL AND KINETIC ADSORPTION OF ANIONIC DYE ONTO IMPREGNATED SILICA GELS WITH ALUMINUM
Environmental Engineering and Management Journal › Vol. 19 › Nr. 8 Impregnation of aluminium ion onto silica gel (SG) surface (Al/SG) is to increase the adsorption capacity of an anionic dye such as Indigo carmine (IC). The impregnation was carried out using wetness impregnation. The change of the functional group was evaluated by FTIR, crystallinity was determined using XRD, surface morphology were studied by SEM-EDX, while surface area
and pore size using N2 gas adsorption-desorption analyzer. Meanwhile, the best of IC adsorption condition onto SG and Al/SG ... Autori: Yudi Aris Sulistiyo ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28253
ECO-FRIENDLY SYNTHESIS OF SILVER NANOPARTRICLES USING Gazania rigens AND EVALUATION OF ACTIVITIES
Environmental Engineering and Management Journal › Vol. 20 › Nr. 1 The present study describes the facile synthesis of silver nanoparticles (AgNPs) by green method using aqueous extract of Gazania rigens. The size, morphological, compositional and optical properties of silver nanoparticles were examined through X-ray diffraction (XRD), Energy Dispersive X-ray spectroscopy (EDX), Scanning Electron Microscope (SEM), and UV-Vis spectroscopy respectively. Ultraviolet-Visible spectra showed the absorbance band between 425–460 nm which indicated the synthesis o... Autori: Tayyaba Shahzadi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28349 |