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...
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ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25168

Iinclude urmatoarele articole:â€? Phenol degradation in water through a heterogeneous photo-fenton processâ€? Study concerning the influence of oxidizing agents on heterogeneous photocatalytic degradation of persistent organic pollutantsâ€? Nonmarket valuation of acequias: Stakeholder analysisâ€? Metals concentration in soils adjacent to waste depositsâ€? Polyelectrolyte - surfactant complexesâ€? Modelling of sorption equilibrium of Cr(vi) on isomorphic substituted Mg/Zn-Al - type hydrotalcitesâ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25206

Include urmatoarele articole:� "Waste not, want not" a study of household attitude toward recycling of solid wastes� A kinetic model for the crystal violet mineralization in water by the electro- fenton process� Development of a coagulation/flocculation predictive model for turbidity removal from tehran water treatment plants� Removal of cadmium (II) from aqueous solutions by sphagnum moss peat: Equilibrium study� Environmental sustainability based on fuzzy models� Impact of dust emi...
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ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25207

Include urmatoarele articole:� Synthesis of Ferrierite/ZSM-35 type zeolite with ethylenediamine as template� Recovery of p-hydroxybenzoic acid from wastewaters by reactive extraction 1. Extraction mechanism and influencing factors� Relationships between metals extent and cytological characteristics at Prunus persica L. pollen� Smoke Emissions From Diesel Vehicles: A Case Study� Carbon dioxide generation - implications for romanian pulp and paper industry � Enhanced decolorization of ...
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ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25208

AbstractThe formation of the polyelectrolyte- surfactant complexes has been studied. On this purpose has been measured the critical micelle concentration for every polyelectrolyte and surfactant which had been used. The phase behaviour of mixtures of a cationic polyelectrolyte (Praestol 611) and an anionic surfactant (sodium lauryl sulphate - SLS) has been studied. For a given polyelectrolyte concentration, with increasing surfactant concentration, three phase regions were identified. The first ...
Autori: Cristina Costache, Gabriel Dabija, Mihaela Mihai
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25214

AbstractThe removal of formasine fines particles from water by precipitation with polyelectrolyte and surfactant complex of Polyacrylamide (industrial product Praestol 611 made by Degussa) and Sodium Lauryl Sulphate (SLS) was experimentally studied. Calcium oxide was added to initiate precipitation of the polyelectrolyte complex together with the fines particles. The experiments were carried out with complexes having the surfactants concentration higher then the critical aggregation concentratio...
Autori: Cristina Costache, Gabriel Dabija, Mihaela Mihai
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25238

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

AbstractThe synthesis of some grafted polysiloxane and azo-polysiloxanes with potential applications as rheology modifiers or surfactants for waterborne paints is reported. Nowadays it became very important to design environmentally friendly systems exhibiting the best end-uses properties. Due to their complex architecture and their sensitivity to UV radiation the studied polymeric systems exhibit very interesting rheological properties. All the polymers containing the azobenzenic groups in the ...
Autori: Constanta Ibanescu, Ioana Moleavin, Iulian Nor, Nicolae Hurduc, Viorel Sandu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25252

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

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

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

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

Abstract The paper presents the surfactant-assisted solvo-thermal route to synthesize nanoparticles of cerium oxide with different shape and morphology. The precursor was calcined at 400°C for 4 h in order to obtain CeO2 nanoparticles. The obtained samples were characterized by means of thermal analysis and FTIR spectroscopy. The UV-Vis analysis was used to study the optical properties. The morphologies and nano-structures were characterized by scanning electron microscopy (SEM) and XRD. It...
Autori: Nicolae Apostolescu, Gabriela Carja, Gabriela Apostolescu, Elena Husanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25541

This paper presents the physicochemical and rheological properties of some complex coagulants derived from the weak and medium anionic polymers and medium cationic surfactant in order to evaluate the opportunity to use them in destabilizing and removing the colloidal systems from water and wastewater. In this respect, weak anionic and medium anionic copolymers of acrylamide and sodium acrylate with commercial names of Preastol 2515 and Preastol 2540, and a medium cationic surfactant derived from...
Autori: Constantin Bobirică, Gabriel Dabija, Liliana Bobirica, Mihaela Mihai
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25850

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

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

AbstractA cloud point extraction (CPE) procedure for the simultaneous preconcentration of trace amounts of Cd(II), Pb(II), Cu(II), Co(II)and Ni(II) ions as a prior step to their determination by flame atomic absorption spectrometry (FAAS) has been developed. Thisdeveloped method is based on the formation of hydrophobic complexes of these metals with the chelating agent 1-(2-thiazolylazo)-2-naphthol (TAN), which then are entrapped “in situ” into micellar media of non ionic surfactantoctylphenoxyp...
Autori: Wanli Huang, Zhixia Zheng
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26357

AbstractThe performance of some complex coagulants derived from weak and medium anionic polymers and medium cationic surfactantin coagulation-flocculation process for water treatment was experimentally investigated by carrying out kinetic studies and bydetermining the optimum coagulant dose. The complex coagulants were prepared from weak anionic and medium anioniccopolymers of acrylamide and sodium acrylate with the commercial names Praestol 2515 and Praestol 2540, and mediumcationic surfactant ...
Autori: Constantin Bobirică
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26478

AbstractBiodegradation is a “green”, powerful and cost-effective way to remediate polluted environment. Still traditional biodegradationtechnologies of hazardous hydrophobic pollutants are generally limited by low bioavailability of such contaminants. That is whythere is a need to develop innovative approaches to enhance the efficiency of biodegradation. The aim of the present work was todevelop the basis of an innovative eco-friendly wastewater treatment technology for remediation of effluents ...
Autori: Tatiana Pantsyrnaya
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26487

AbstractPetroleum tanker trucks are integral vehicles for delivering fuel and other petrochemical products from place to place and must becleaned regularly. Pressure washing with hot or cold water serving to remove oil and filth from the tanker truck container,produces oily waste water with an oil concentration of about 300-500 mg L-1 which, according to environmental standards andregulations worldwide, must be disposed of and treated properly. In the present paper an integrated electrochemical ...
Autori: Konstantinos Dermentzis
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26520

Abstract A new catalytic mixture of nanosized dioxide (CeO2) and zinc oxide (ZnO) powders have been synthesized by surfactant-assisted solvo-thermal route, characterized and evaluated for photocatalytic activity. The prepared catalysts were characterized by TG, XRD, SEM and EDAX methods. SEM analysis showed that the catalyst particles have spheroidal shape and their sizes range from 50 to 80 nm, organised as uniform distributed aggregates with large surface area, leading to the existence of ...
Autori: Gabriela Antoaneta Apostolescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26655

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

In the presence of surfactant sodium dodecylbenzene sulfonate (SDBS), the development of main hydrolysis products (soluble carbohydrate and protein) and hydrolytic enzyme activities (amylase and protease) were monitored during microaerobic thermophilic digestion (MATD) of waste activated sludge (WAS). Results showed that the presence of SDBS remarkably increased the solubility of protein and carbohydrate into aqueous phase. The maximal concentration of carbohydrate and protein was 990.39 and...
Autori: Qi Yang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26958

This paper studies, in lab scale, the possibility of removing a rich-in-pollutant soil fraction using flotation, with the clean fraction been restored to its natural condition. The tests were carried out in a conventional flotation cell with mechanical agitation. Artificially polluted soil was used throughout this study by mixing soil with diesel fuel. The effect of the following flotation factors was studied: pulp pH, collector type and quantity, conditioning and flotation time, initial soil...
Autori: Nickolaos Georgiou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26960

Triton X-100 (TX100) and Tween 80 (TW80) were used to study the decontamination of polycyclic aromatic hydrocarbons (PAHs) in the bulk and different size fractions of soil samples from a former coke oven plant. The effects of PAH ring number, initial concentration and soil total organic carbon (TOC)/black carbon (BC) contents on PAH removal efficiencies were analyzed. Surfactant washing for the bulk sample showed clear relation between the removal efficiency and PAH ring number. When the sur...
Autori: Helian Li
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27093

Fungal isolate Aspergilius niger V-8 (IITB) was isolated from the sludge of anaerobic digester of distillery wastewater treatment plant and was found to be an appropriate fungal isolate for the purposes of decolourization of anaerobically digested molasses spentwash (ADMS). The study aimed at optimization of the environmental parameters for achieving maximum decolourization of ADMS using isolated fungal species. Environmental parameters like initial pH, mixing, immobilization and surfactant a...
Autori: Mrityunjay Singh Chauhan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27502

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

A micelle-mediated preconcentration method has been developed for determination of Safranine T at trace amounts, which is widely used in textile industry. It can be evaluated as one of the dangereous chemicalsdue to its carcinogenicity and toxic properties. The method is based on the cloud point extraction (CPE) of Safranine T at pH 8.0 in the presence of Triton X-114 as nonionic surfactant. The obtained surfactant–rich phase (SRP) was diluted with ethanol and its absorbance was measured ...
Autori: Songül Ulusoy
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27538

The hydrodynamic behavior of bubble column bioreactors (BCB) is strongly dependent on the bubbly flow regime. Therefore, the influence of superficial gas velocity (Ug) and Sauter mean diameter (d32) on gas hold up (εg) was evaluated for the cultivation of a petroleum-degrading consortium. Hydrodynamic parameters were determined by photographic techniques. Also, the biomass cultivation was quantified by suspended solids formation (SS). Our findings indicated that the d32 increased at high...
Autori: Olivia Tzintzun-Camacho
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27597

Phenolic compounds are known as recalcitrant pollutants in many industrial wastewaters, e.g. olive mill wastewater. An efficient treatment is therefore needed before the discharge of phenol-containing wastewaters into the environment. The possibility of removing some natural occurring phenolics, namely tyrosol, p-coumaric acid and vanillic acid, by micellar-enhanced ultrafiltration (MEUF) using a cationic surfactant, cetylpyridinium chloride (CPC), and polyethersulfone membranes of 20 and 50 kDa...
Autori: Abdelilah El-Abbassi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27607

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

In this study, a soil washing process in the presence of a nonionic surfactant solution of Tween 80 or Triton X-100 was investigated. Sandy soil was contaminated in the laboratory with naphthalene (10 mg/kg and 5000 mg/kg) and anthracene (25 mg/kg and 200 mg/kg), then washed with surfactant solution. A preliminary water washing step showed the performance of water in the removal of the two polycyclic aromatic hydrocarbons (PAH), especially naphthalene. The effect of Tween 80 and Triton X-100 was...
Autori: Razika Khalladi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27637

This paper deals with the degradation kinetics of an anionic surfactant (sodium dodecyl sulfate, SDS) under UV and UV-H2O2 advanced oxidation process (AOP). Experiments were performed in a batch reactor which emits monochromatic light centered at 253.7 nm. The photon flux of the UV reactor was 1.9(±0.1)×10-4 Einstein/L-min. Under direct UV, only 45% SDS degradation was observed at a fluence of 40.65 J/cm2 for initial SDS concentration of 0.35 mM. The apparent fluence-based pseudo...
Autori: Bijoli Mondal
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28013

The work is devoted to the search and investigation of the properties of the effective environmentally friendly phytoremediation activators. An integrated approach was used to evaluate the effect of the compositions of thiosulfonates with rhamnolipid biosurfactant on remediation plants. The biochemical and biophysical analysis of the rapeseed and ryegrass plants grown in the oil polluted soil - photosynthetic pigments, indicators of oxidative reactions and electrical impedance characteristics we...
Autori: Olena Yaremkevych
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28319

At present, the production of oily sludge is huge, and the micro-emulsion method can effectively separate crude oil and water from the oily sludge by reducing the interfacial tension between oil and cement. In this paper, the micro-emulsion was prepared by using surfactants, such as sodium dodecyl benzene sulfonate (SDBS), cetyltrimethylammonium chloride (CTAB), sodium dodecyl sulfonate (SDS), sodium cetyl sulfate (CAS), and alkylphenol polyoxyethylene ether (OP-10) as the main raw materials. T...
Autori: Lanlan Yu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28344