The amperometric response in dynamic or fixed potential conditions, as cyclic voltammetry (CV) and chronoamperometry (CA) of a copper oxide-copper electrode was studied and proposed for the fast characterization of the simulated wastewaters containing acetylsalicylic acid (ASA) and sulfur compounds, i.e., thioacetamide (TA) as organic pollutant models. The additivity of the individual amperometric signals in the overall response of the electrode for mixed solutions corresponded to over 95% recov...
Autori: Aniela Pop, Ciprian Radovan, Florica Manea, Georgeta Burtica, Ilie Vlaicu, Joop Schoonman, Marcel Morariu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25158

Contain all the articles from this issueICEEM /02 PLENARY SESSION:"Environmental Engineering and Management in the Context of Sustainable Development"Green technology foresight of high technology: Hype of potentials - The challenges from nanotechnology, Biotechnology and ICTMichael S?¸gaard J?¸rgensenIntrinsic properties of noble metals in catalytic selective reduction of NO by propene in lean burn conditionsAnne Giroir-Fendler, Helleh Saadallah, Adela HaletaICEEM/02 - ENVIRONMENTAL ENGINEERING ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25178

AbstractHeavy metals can be transported by rivers which flow through areas with industrial pollution, both as metal in solution and metal adsorbed to suspended solids. They can settle in lakes and accumulate in the sediment, exhibiting significant effects on wildlife and humans if they enter into the food chain.In this work, heavy metals transport and sedimentation is simulated based on an analytical model proposed in literature, considering the material balance and complementary equations, unde...
Autori: Camelia Beţianu, Florina Ungureanu, Loredana Branza, Lucian Vasile Pavel, Maria Gavrilescu, Simona Pintilie
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25197

AbstractThe absorption of CO2 into an aqueous solution with 1.45 mol/L 1,5,8,12-tetraazadodecane (APEDA) polyamine has been studied at three temperature (298, 313, 333 K) in a Lewis type absorber with a constant gas-liquid interface area of (15.34 Âą 0.05) x 10-4 m2. The experimental results have been interpreted using the equations derived from the two film model with the assumption that the absorption occurred in the fast pseudo- first- order kinetic regime. The results confirmed the validity ...
Autori: Chakib Bouallou, Ilie Siminiceanu, Ramona-Elena Tataru-Farmus
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25223

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

AbstractThe effective mass transfer area of a Mellapak 750 Y structured packing was measured in a bench-scale plant with a column having an internal diameter of 100mm, and a packing height of 518 mm, using a broad range of gas and liquid flow rates. The absorption of carbon dioxide into natrium hydroxide aqueous solutions of 0.5 and 1.0 mol/L has been employed as test reaction. The validity of data obtained was tested by checking the two conditions of fast pseudo first order irreversible reactio...
Autori: Anton Friedl, Ilie Siminiceanu, Michael Harasek, Mihaela Dragan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25264

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

AbstractIn India, transportation sector is growing fast and the number of vehicles on Indian roads is increasing at a rate more than 7 percent a year. During the period of 50 years from 1951 to 2001, the number of vehicles has increased from 0.3 million to 43 million i.e. an increase of almost 143 times. This has led to overcrowded roads and noise pollution. The transportation sector is one of the major contributors to noise in urban areas, accounting to as much as 55 percent of total noise on t...
Autori: Arvind Kumar Shukla, Jyoti Bhushan Srivastava, Manoranjan Parida, Sukhvir Singh Jain
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25279

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

AbstractA greenhouse experiment was conducted to determine the phytotoxic effect of heavy metals such as Cd, Cu, Ni, Pb and Zn on the growth of Sunflower (Helianthus annuus): on the seed germination, root/shoot growth and uptake of metals in soil-vermicompost media. The selected metals were dosed at various concentrations ranging from 0, 5, 10, 20, 40 and 50 ppm separately in soil - vermicompost media (3:1) in pot experiment. The seed germination, root and shoot growth were found significantly a...
Autori: Chhotu D. Jadia, Madhusudan H. Fulekar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25306

- Artificial intelligence applications in the atmospheric environment: status and future trends- Kernel methods and neural networks for water resources management- Environmental decision support systems based on models and model-based reasoning- Towards an intelligent tutoring system for environmental decision makers- SBC-MEDIU: A multi-expert system for environmental diagnosis- Fast and accurate residential fire detection using wireless sensor networks- Validation of a knowledge-based risk mode...
Autori: http://www.ecozone.ro/reviste.php?RID=25377

Abstract A crucial stage which makes the other directions of development of membrane processes is getting new membrane materials, to meet increasingly stringent of selectivity and productivity. Polyetheretherketone shows high stability against chemical and physical agents but is poorly soluble in most common solvents. Present studies on obtaining the support of the polyetheretherketone membranes were limited by: solubility of polyetheretherketone in concentrated sulfuric acid and fast speed a...
Autori: Mihaela Emanuela Craciun, Aurelia Cristina Nechifor, Florin Aldea, Gheorghe Nechifor
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25475

Abstract Changing fuel consumption to a more ecological environmentally alternative is replacing fossil fuels with fuels generated from renewable resources. Ethanol, a renewable fuel, can be produced mainly from crops, lignocellulosic biomass and different other environmental wastes. Although ethanol has been produced mainly from crops, there is a great interest in using cheaper lignocellulosic materials as a feedstock for ethanol production. The aim of this paper is study of dilute acid hyd...
Autori: Ionel Balcu, Adina-Elena Segneanu, Marius Constantin Mirica, Mirela Ioana Iorga, Corina Macarie, Raluca Martagiu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25481

Abstract Worldwide, tourism is the fastest growing major industry, but not all consequences are positive. This has lead to a growing attention for â€?sustainable tourism’. Compared to international guidelines, the current governance for sustainable tourism in the Netherlands proves to be very weak. Is this just because of stakeholders’ interests and their motivation to protect and conserve, on the one hand, or just encourage growth, on the other? We find some support for this, but also fi...
Autori: Hans Bressers, Valentina Dinica
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25530

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

Abstract In this work the experimental conditions to synthesize, by direct hydrothermal synthesis, self-bonded pellets of ETS-10 phase containing iron were studied. The following gel composition was used: xNa2O-0.6KF-1.28xHCl-yFe2O3-0.2TiO2-1.49SiO2-39.5H2O with 0.8Â???xÂ???1.4 and 0.015Â???yÂ???0.08. The products obtained were characterized through X-ray diffraction on powders (XRD), thermal analysis (TG, DSC, DTG), scanning electron microscopy (SEM) and microanalysis (EDS). The data obtai...
Autori: Pierantonio De Luca, Danilo Vuono, Monica Filice
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25544

Abstract Prompt and accurate residential fire detection is important for on-time fire extinguishing and consequently reducing damages and life losses. To detect fire sensors are needed to measure the environmental parameters and algorithms are required to decide about occurrence of fire. Recently, wireless sensor networks (WSNs) have been used for environmental monitoring and real-time event detection because of their low implementation costs and their capability of distributed sensing and pr...
Autori: Majid Bahrepour, Nirvana Meratnia, Paul J. M. Havinga
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25611

Abstract Decision trees and rule-based systems including variants based on propositional and fuzzy logic have been the method of choice for knowledge representation in many applications of environmental decision support systems. Reasons are the ease of use, the capability of representing uncertainty, and the fast computation of results at runtime when using decision trees, rule-based systems, or other similar means for knowledge representation. Unfortunately there are drawbacks related with t...
Autori: Franz Wotawa, Ignasi Rodriguez-Roda, Joaquim Comas
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25614

? GREEN SYNTHESIS OF SYMMETRICAL CARBONATE FT-IR STUDY ? SINTERED BASALT AS A PROMISING SUSTAINABLE MATERIAL IN MECHANICAL ENGINEERING ? DESIGN OF BUILDINGS INCLUDING ENVIRONMENTAL IMPACT ? ANALYSIS METHODS FOR PYRAZINE-2,3-DICARBOXYLIC ACID SYNTHESIZED USING ELECTROCHEMICALLY REGENERATED KMnO4 ? RESEARCH ON NaCl SALINE AEROSOLS II. NEW ARTIFICIAL HALOCHAMBER CHARACTERISTICS ? DETERMINATION OF AEROSOLS POLLUTANTS ON MEMBRANES. 1. MEMBRANES PREPARATION AND CHARACTERIZATIO...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25660

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

Fuel injection system, intake system and the geometric shape of combustion chamber are the three key factors to the fuel-air mixture and combustion process for diesel engine. long with the need of high power density in diesel engine, the pressure of intake is higher increasingly. Together with the effect of high pressure fuel injection, the fuel-air mixture and combustion process is hard to spread as usual. In this circumstance, the performance of power, heat efficiency and emission in diesel en...
Autori: Shang Yong, Liu Fu-Shui, Li Xiang-Ronghttp://www.ecozone.ro/reviste.php?RID=25704

Abstract:The demand for new and high performance products in the automotive industry is increasing exponentially and this trend imposesinnovative concepts for cars. The future solutions for the automotive industry may find their answer in the fabricationtechnologies and also in alternative propulsion and energy production.The car design field cannot ignore the global economic crisis, imposing new approaches in terms of materials and cost effectivetechnologies and by the means of environmental pr...
Autori: Mihai Comşiţ
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25733

Abstract:Hydrothermal synthesis was used to obtain nanostructured TiO2 based nanopowders. There were prepared pure and ZrO2 dopedcompositions consisting mainly of anatase phase with crystallite size up to 20 nm. The agglomerates of the as-synthesizedmaterials had dimensions ranging from a few hundreds nanometers to 200 microns. The investigations concerning the thermalbehavior revealed the presence of an exothermal effect at around 550oC which could indicate a possible phase transformation ofana...
Autori: Adrian Mihail Motoc, Anca Duta, Oana Raita, Radu Adrian Carcel, Radu Robert Piticescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25758

Abstract:Recovery of residual ammonium nitrogen (NH4+-N) from dissolved air flotation (DAF) pretreated poultry slaughterhouse wastewater was studied by means of magnesium ammonium phosphate hexahydrate (MgNH4PO4.6H2O, MAP) precipitation in a lab-scale batch study. The maximum recovery values were obtained as 80.2%, 97.1% and 53.6% with the addition of MgCl2.6H2O + KH2PO4, NaH2PO4.2H2O + MgSO4.7H2O, and MgOHCO3 + 85% H3PO4 at pH 9.5, respectively. Based on the physicochemical findings, subsequent...
Autori: Aylin Gunay, Idil Ozis, Ilter Turkdogan-Aydinol, Kaan Yetilmezsoy
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25797

Abstract: In this study, decolorization and degradation of aqueous nickel phthalocyanine reactive dye solutions was comparatively studied by electrochemical methods, such as electrocoagulation, electrooxidation and electro-Fenton processes. In the electrocoagulation process with aluminum electrodes the colored aqueous solutions containing 100 mg/L nickel phthalocyanine and 6 g/L NaCl were treated at initial pH 7.5 and applied current densities of 5, 10 and 20 mA/cm2, where fast and 100% decolori...
Autori: Achilleas Christoforidis, Dimitrios Marmanis, Evgenia Valsamidou, Konstantinos Dermentzis, Konstantinos Ouzounis
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25804

The composite materials based on natural zeolite and undoped and N-doped TiO2, i.e., Z-Na-TiO2 and Z-Na-TiO2-N, were successfully synthesized by solid-state reaction in microwave-assisted hydrothermal conditions. Undoped TiO2 and N-doped TiO2 nanocrystals were previously synthesized by sol-gel method. The X-rays diffraction results of TiO2 nanocrystals indicated that anatase TiO2 is the dominant crystalline type. The composite materials were structural and morphological characterized by X-ray di...
Autori: Cornelia Bandas (Ratiu), Carmen Lazau, Paula Sfirloaga, Florica Manea, Rodica Pode
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25911

Fly ash and fly ash based zeolites are inorganics used for improving soil quality. In the current paper, the hydrothermal modification of fly ash was studied. Three methods have been employed for this purpose. The first method involved the use of an autoclave, where synthesis has been performed at a temperature of 120 0C and a treatment time of 4 to 8 hours. Within the second method, the modification of the ash at a temperature of 600 0C by fusion was carried-out. In this method, a mixture of as...
Autori: Corneliu Munteanu, Daniel Bucur, Lacramioara Rusu, Maria Harja, Marinela Barbuta, Ramona Carla Ciocinta
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25885

A fast economic development in China over thelast three decades has lifted hundreds of millions ofpeople out of poverty. However, an annual GDPincrease of over 10% due to the large scale industrialactivities and fast urbanization has released substantialamounts of pollutants into the environment and exertedtremendous pressure on local ecosystems. Although alarge amount of investment has been made by theChinese government and a series of efforts have beenmade by the environmental regulators, scie...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25965

AbstractThe transmission line pulse (TLP) method it is one of the most advantageous electrostatic discharge (ESD) testing method forsemiconductor devices. A new factual approach is developed in this paper which is based on TLP method. The new method isnamed “very-fast transmission line pulse” (VF-TLP), having as principal characteristics the very short pulse width and small risetime. The appropriate device under test (DUT) is a gate-grounded (GG) NMOS transistor. The testing signal was applied o...
Autori: Alexandru Salceanu, Ana-Maria Nicuta, Paul Bicleanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25992

AbstractThe electrostatic discharge (ESD) event is a severe source of interference that can produce damages in any electronic system. Afull-body of an ESD generator is modeled using the Cadence IC 5.3 package software in order to reproduce the referencedischarge current assured by the standard specifications. The factors that introduce electromagnetic radiations into the systemshave also been investigated. Several tests based on proper matches between the parameters of the antenna were computed ...
Autori: Alexandru Salceanu, Ana-Maria Nicuta, Oana Beniuga, Paul Bicleanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25993

AbstractThe representation of relevant information from data generated through atmospheric imaging is of substantial importance toenvironmental sciences, meteorology, as well as in weather hazard predictive models for disaster prevention. As the techniquesfor the acquisition of such data have progressed and grown in complexity, so have the visualization algorithms required to processthe related data and to produce images or animations of the underlying information. To this extent, we present a g...
Autori: Marius Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26001

AbstractIt is already demonstrated that mental or psychological stress can affect human health, since it is a major risk factors for numerouscurrent diseases such as: high blood pressure, congestive heart failure, coronary diseases, stroke, causing often sudden death.These diseases are particularly dangerous in the case of car drivers, since they have to make accurate and fast decisions evenunder stress condition. Frequently, the stress can be detected by different methods with various degrees o...
Autori: Alexandru Păsărică, Cristian Rotariu, Hariton Costin
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26008

• STUDIES ON HEAT RECOVERY FROM CELLULOSIC TEXTILES FINISHING WASTEWATER    • ASSESSMENT OF SYNERGIC REGULATORY ACTIONS OF SPRUCE BARK EXTRACT AND DEUTERIUM DEPLETED WATER ON MAIZE (Zea mays L.) CROPS    • LUNG CANCER RISK INDUCED BY RESIDENTIAL RADON IN CLUJ AND ALBA COUNTIES, ROMANIA    • A CLEAR SKY IRRADIATION ASSESSMENT USING THE ESRA MODEL AND SRTM DATABASE    • ENVIRONMENTAL FACTORS ASSOCIATED WITH DYSPHONIA IN PROFESSIONAL VOICE USERS    ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26014

AbstractA comparative study regarding the shape, dimension and bactericidal activity of the undoped and Ag-doped TiO2 nanocrystalswas achieved. In this way, two hydrothermal methods, classical hydrothermal and microwave-assisted hydrothermal, was usedfor nanoparticles synthesis. The obtained materials were investigated by X-ray diffraction, DRUV-VIS spectroscopy, BET andSEM/EDX analysis. Antibacterial activity of undoped and Ag-doped TiO2 materials was tested on real water from Bega River.The be...
Autori: Carmen Lazau, Corina Misca, Corina Orha, Cornelia Bandas, Sorin Olariu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26034

AbstractWaste electrical and electronic equipment (WEEE, e-waste) represent the category of municipal waste with the fastest growthrate of the quantities generated particularly in developed countries. In Romania the WEEE management concerns have emergedrecently and the amount of information and data available is limited and sometimes irrelevant. In this case, studying the forcesthat influence WEEE management system directly or indirectly is useful for both the national and international stakehol...
Autori: Nadia Ciocoiu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26092

AbstractIn this study, a computer program, the Land Surface Temperature Calculator (LST Calculator) was developed in Visual Basic.NET (2008) which employs the Radiative Transfer Equation (RTE) method. The LST Calculator is a valuable tool to studythermal environments using the thermal band of Landsat TM/ETM+ data and make the land surface temperature retrieval muchsimpler and faster. LST can be retrieved with this tool by inputting required parameters in the program. Thus, this program willbe he...
Autori: Hakan Oguz
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26093

Abstract Being involved in the synthesis of precursors for amphetamine and amphetamine-like drugs, pyridine (Py) may be also regarded as a by-product found when these drugs are obtained via the Leuckart method. Also, pyridine is well known as a biomarker of microorganisms, when those are subjected to pyrolysis before analysis by various instrumental techniques. Consequently, since Py is not commonly found in the air, its presence as a contaminant at trace levels in a room could ind...
Autori: George-Bogdan Ghira
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26109

AbstractExcess biomass produced in the degradation processes of organic pollutants is creating environmental challenges for wastewatertreatment plants. The A+OSA system, a modification of the anoxic / oxic (A/O) process via insertion of a sludge holding tankinto a sludge return line, has been demonstrated to be capable of achieving simultaneous nutrient removal and sludge reduction.Here we report the results of an investigation aimed at evaluating the impact of the sludge holding tank on the bio...
Autori: Li Jia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26207

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

AbstractKohonen Self-organizing map (KSOM) modeling have been applied increasingly for analysis, estimation and prediction ofseveral water quality processes, which are embedded with high complexity, dynamism and non-linearity. KSOM or unsupervisedneural networks were applied to microbial data (Escherichia coli, faecal streptococci, and total coliforms) from the effluent of atwo year data set (2008-2010) on two permeable (pervious) pavement systems used to treat storm water runoff contaminated wi...
Autori: Kiran Tota-Maharaj
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26226

AbstractThis work investigated the impacts of biodiesel properties on the complete fuel injection process of a high-pressure unit pump(UP) fuel system. Analysis based on a one-dimension flow model in the UP system deduces that both the injection pressure andthe pressure changing rate may be affected by the fuel properties. A serial of experiments were conducted under varied operationconditions to compare the influences of the diverse fuel properties on the fuel injection process. The test result...
Autori: Hefei Dai, Jing Peng, Tao Qiu, Xuchu Li, Yan Lei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26385

AbstractResearches aim to develop new knowledge in the metal cutting field, using a relatively new technique with a low number ofapplications nationwide, namely the flexible explosive charge with cumulative effect for fast and precise cutting of metals. Theprocedure of cutting with explosives is a process that involves using and handling materials in their solid phase.This procedure isespecially applied in cases where materials are mostly metals and it uses a directed and controlled cumulative e...
Autori: Ilie Ciprian Jitea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26410

AbstractThe objective of this study is air pollutants discharging on active centers, depending on its relative electric permittivity, effectivein thermal, chemical and mechanical hydrogen relaxation enabling the fastest velocity of pollutant heat transport. The diagnosticsof relative electric permittivity is carried out on the basis of the daily pollutants mass concentration monitoring results, in sixthday period in the various seasons and locations in Romania and Serbia. The monitoring results ...
Autori: Milan Pavlović
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26507

AbstractSocial and economic development can cause land cover changes that significantly affect ecosystem services and functions. Thisstudy investigated the temporal variation in ecosystem service values in response to land cover changes caused mainly by humanactivities in Harbin City, one of the fastest growing metropolitan areas in northeast China. The aim was to provide guidance forregional sustainable development. An evaluation method for ecosystem service values based on land cover change wa...
Autori: Zi Tang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26556

Abstract The deterioration of the natural polymers is a very complex process, and a problem that can be best addressed through modelling. The approach for modelling the rheological behaviour of different cellulose-based textile fibres (cotton, hemp, flax) when subjected to a hydrothermal treatment, followed by exposure to different doses of gamma-rays (5, 10, 15 and 25 kGy) is presented here. In order to predict the optimum radiation dose limit and hydrothermal aging time, the mathematical m...
Autori: Angelica Olaru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26678

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

Abstract The interaction between groundwater systems and urban environments has become an important challenge that fast developing modern cities must face. Contributing factors are, but not limited to, the continuous horizontal and vertical expansion of cities, population growth, climate change, water scarcity and water quality degradation. The present paper provides an overview on several aspects related to the interaction between aquifer systems and urban infrastructures. A review of urban...
Autori: Mohamed Amine Boukhemacha
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26748

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

Abstract The research is focused on the relationship between aviation systems and extreme terrorist events, the impacts of such events, and the solutions to manage the associated risks on medium and long term. The development of predictive models for extremeasymmetric events in aviation (EAEA) still represents an emerging direction of interdisciplinary research because not all mechanisms and interactions are understood. The testing of models is difficult due to lack of data and interpretatio...
Autori: Catalin Cioaca
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26762

Abstract The Bio.Lea.R project aims to demonstrate the performance of a landfill for less reactive, biologically treated waste (pretreated organic wastes) compared to a conventionally managed landfill, with regard to both environmental (biogas and leachate production) and economic aspects. The objective is to control the pretreated biodegradable waste through a liquid injection in order to achieve the same biogas quantity in a shorter time than in conventional landfill. Laboratory and full ...
Autori: Alberto Godio
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26784

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

Abstract Based on the study on the reformation of Dawsonite-bearing sandstones with CO2 fluids at different temperature (100oC 200oC and 300oC) and different CO2/H2O/sandstone systems, it is suggested that as the temperature increases, the corrosion intensity of dawsonite-bearing sandstones is gradually increased, but the stability of the sandstone is reduced. The SEM study shows that there are radiated aggregate sediments of boehmite in all samples. At 200oC, with the dissolving of dawsonit...
Autori: Xi-Yu Qu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26814

Abstract Flame atomic absorption spectrometry (FAAS) and X-ray fluorescence spectrometry (XRF) were used as investigation techniques in the assessment of soils contaminated with metals such as Pb, Cu and Zn. The investigation focused on the comparability of the concentrations determined by the two methods, in order to identify the most suitable approach for Pb, Cu and Zn quantification, with respect to metal monitoring in brownfields. Generally, the concentrations obtained through FAAS were...
Autori: Maria Lucia Bizo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26875

Abstract The results of batch tests of anaerobic dechlorination on groundwater samples collected downgradient from an industrial site in Northern Italy are presented and discussed. The experiments were carried out using sucrose as electron donor at equimolar concentration and at selected excess with respect to the total reducible species. The purpose of the study was to investigate the effectiveness of sucrose to achieve a complete chlorinated solvents degradations at the specific site, and ...
Autori: Luca Di Palma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26895

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

During three years, 2011-2013, time series of 222Rn (radon) and 220Rn (thoron) progeny concentration measured at Bacau, Romania have been analyzed with different deterministic instruments in order to extract valuable information about their deterministic behavior. The time series of data were obtained within the framework of the monitoring program performed by the Environmental Radioactivity Monitoring Station, Bacau. Correlations with the deterministic nature of atmospheric temperature and ...
Autori: Marius Stamate
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26982

A biodegradable iron based alloy was obtained through classical melting method using a furnace with controlled atmosphere. The metallic material was obtained from high purity materials using a proper obtaining method. The material is proposed as an alternative to magnesium alloys that have a very fast degradation period for applications with longer healing periods (more than 3 and between 12 to 18 months). The material was analyzed using scanning electron microscopy (SEM) and X-ray dispersive...
Autori: Sergiu Stanciu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27023

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

The generation of energy via fossil fuel burning results in carbon emissions. These emissions contribute to the climate change of our world, particularly in terms of global warming. On the contrary, energy has become blood of life for the existence and functioning of our built environments. In order to control carbon emissions, the UK has taken lead among many countries around the globe and especially in Europe by passing a bill for the Climate Change Act 2008 which legally binds the UK to at...
Autori: Talib E. Butt
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27045

The green products market is growing up fast, but there is still a strong need to provide clear and verified information about their environmental performances in order to create a real consuming preference. The main preliminary results of a market survey conducted in Romania in 2010-2013 within the LIFE+ project -Promoting green products, aimed at evaluating the availability of eco-labeled products and at promoting their use, are presented in this paper. A national Green Register of type I e...
Autori: Antonina Temea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27114

The radiofrequency (RF) electromagnetic fields represent one of the most common and fast growing environmental influences, raising concerns about possible effects on human health. The fact that there is a continuous change and an emergence of RF communication technologies on the market also leads to a change of daily RF exposure levels for the general public. In such a context, the main objective of our study is to assess the RF exposure originating from the emerging Worldwide Interoperability f...
Autori: Eduard Lunca
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27215

A Microwave-Ultraviolet reactor was developed and the effect of microwaves on photodegradation of various phenols was studied using the reactor. The degradation study was carried out by six methods - microwave irradiation, photodegradation with UV light, microwave and ultraviolet radiations (microwave irradiation in presence of TiO2, photodegradation with UV light in the presence of TiO2 and also simultaneous MW and UV irradiations in the presence of TiO2). The relative efficiencies of the degr...
Autori: Singaram Karthikeyan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27248

In this study was synthesized MCM-41 mesoporous silica by hydrothermal treatment and funtionalized with titanium in order to obtain mesoporous materials with high surfacea area and photocatalytic activity in photodegradation of organic compounds as antibiotics. The functionalization of the synthesized support material was achieved by impregnation from alcoholic solution. The obtained materials (MCM-41) and (Ti-MCM-41) were characterized by X-ray diffraction (XRD), scanning electron microscopy (S...
Autori: Cristina Orbeci
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27274

In emergency departments computed tomography (CT) has became the most important diagnostic tool because it is a very fast and accurate method, but the main drawback of the increased number of the CT examination is the high radiation dose and the potentially increased risk of developing cancer. That why, lowering the radiation dose at a level as reasonable achievable is the most important strategy in modern medical practice. This article has two parts: first part is a review of the physics of rad...
Autori: Bogdan Dobrovăț
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27313

Pharmaceuticals contaminants in waters exhibit a significant threat on the human health and the ecosystem quality. This research demonstrates the utility of a silver-doped zeolite-modified carbon nanofiber-epoxy (AgZ-CNF) prepared by two-roll mill method in development of the fast methodology for the detection of fluoxetine (FXT) in the aqueous solution. The results showed the role of zeolite that improved the sensitivity and the limit of detection of FXT resulted to the possibility to propose a...
Autori: Magdalena Ardelean
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27328

The objective of this study was to develop a naturally dyeing process of 70% wool /30% Angora mohair blended yarns by using bio-mordants as an environmentally friendly alternative for the conventional metallic salts. Bio-mordanting operation was achieved by using of condensed tannin extract from quebracho bark trees. Conventional mordanting has been performed using the conventional mordants like copper sulphate and tin chloride. Another specific objective of this study was to investigate the pos...
Autori: Ioana Stanculescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27337

Environment-friendly demulsifying strains could be applied in breakup of emulsion produced in the petroleum industry. The demulsifying strain Alcaligenes sp. S-XJ-1 was found to be capable of utilizing paraffin or certain pure n-alkane as its sole carbon source, and exhibited a strong cell surface hydrophobicity above 70% and demulsifying ability above 80%. A maximum biomass of 6.27 g/L was obtained when the demulsifying strain was cultured using eicosane as carbon source. A positive correlation...
Autori: Xiang-Feng Huang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27379

Fly ash ponds are dangerous for the environment because the fly ash can cause multiple harmful effects. This is cause for major concern for researchers and industry people alike. The rise of the water table level inside the ash structure may cause a loss of stability over time, with adverse effects on the environment. Therefore it is necessary to adopt efficient solutions to ensure the stability of ash ponds and rapid measures that can be applied. The use of geosynthetic materials has proven to ...
Autori: Lidia Niculiţă
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27483

A low-cost magnetic zeolitic material was synthesized from coal fly ash by means of a new, simple method involving alkaline hydrothermal zeolitization of fly ash (FA) followed by low-intensity wet magnetic separation. Scanning electron microscopy with energy-dispersive X-ray analysis was applied to characterize the composition, microstructure, and morphology of the material. The mineral and synthetic zeolite phases were identified by powder X-ray diffraction. The obtained magnetic zeolitic m...
Autori: Annie Shoumkova
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27486

Lijiang River is the link of Guilin landscape and the golden waterway of Guilin tourism. With the development of social economy, the pollution problem of Lijiang River in recent decades has become more and more serious, which has aroused widespread concern and attention. However, the study on the reduction of river pollution load is seldom found reported until now. In this paper, the pollutant load of Lijiang River is estimated by equal standard pollution load method and the water pollution mode...
Autori: Ronghui Li
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27490

A polycrystalline CeO2-ZnO catalyst was prepared by using a hydrothermal procedure in order to improve the structural properties. This polycrystalline material was then used to remove organic pollutants from aqueous solutions by the means of photocatalysis. The structural, morphological and optical properties of as-prepared materials were characterized by several techniques, such as UV-visible spectroscopy, SEM, FTIR, XRD. The SEM analysis shows that the crystallite size sample varies in the ran...
Autori: Nicolae Apostolescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27550

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

Microalgae can be considered as significant sources of sustainable and beneficial biocompounds such as carotenoids, lipids, proteins, polysaccharides, pigments, vitamins etc., with many uses in energy production (biofuels), pharmaceutical, cosmetic and food industries. This class of microorganisms are considered as sustainable feedstock due to some major advantages related to metabolism modulation, faster growth rate compared to plants, no use of terrestrial land. This review will present the mo...
Autori: Alexandra Cristina Blaga
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27558

Urban expansion, often seen as an indicator of economic growth and a possible response to housing crisis in big cities, is the main driver for carbon emissions in the metropolitan area due to higher values of household income, vehicle ownership and home size. The transport related pollution includes over 200 different compounds: besides CO2 emissions, CO, NOx, BTX and dust resulting from exhausting processes, from abrasive wear of brakes, tires and road surfaces. The expansion of the urban areas...
Autori: Lucian Roșu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27560

The potential of Sphagnum moss peat to adsorb oxyanions (As(III), As(V), Sb(III), Sb(V) and Se(VI)) from aqueous solution was studied in batch mode. For arsenic (both species) and selenium, the results were negative: moss peat is not able to retain these oxyanion. For antimony, the hydroxyl and carboxyl groups from the Sphagnum moss peat surface seems to be responsible for Sb uptake. Kinetic studies were conducted for both Sb(III) and Sb(V) and a fast uptake process was observed, equilibrium bei...
Autori: Gabriela Ungureanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27565

Degradation of Clindamycin phosphate (CMP) was studied in aqueous solutions by an anodic oxidation process under galvanostatic conditions. The electrolysis cell consisted of a Ti/SnO2-Sb anode, prepared by dip-coating technique, and a 316 stainless steel cathode, both of which had a surface area of 6 cm2. The effects of critical factors, including CMP concentration, current density, initial pH, and the supporting electrolyte were evaluated. The electrochemical oxidation of CMP was controlled by ...
Autori: Mitra Gholami
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27639

Magnesium wastes are among the gradually ascending and therefore challenging metal wastes, which are produced by many industrial activities. The purpose of this study is the usage of magnesium waste, a raw material in magnesium borate production by hydrothermal synthesis. Boron sources (boric acid (H3BO3) and boron oxide (B2O3)) react with magnesium wastes in order to synthesize the magnesium borate mineral of admontite (MgO(B2O3)3ꞏ7(H2O)). In addition to the synthesis from waste magne...
Autori: Azmi Seyhun Kipcak
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27657

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

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

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

In this study, application of integrated anaerobic-aerobic membrane sequencing batch reactor (MSBR) for treatment of an azo dye-containing wastewater was investigated. For this purpose, three lab-scale MSBR systems were operated at various hydraulic retention times (HRT) of 48, 24 and 16 h with constant value of solid retention time (SRT) for all reactors. The treatment performance and the decolorization kinetic of the systems as well the fouling rate of the membranes were evaluated during the e...
Autori: Maryam Hasani Zonoozi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27851

The water supply system is very important for the development of the country. Furthermore, a wastewater treatment with more than two levels of treatment decreases the risk of environmental pollution with heavy metals and better cleans the water that will be reused. According to Eurostat, in 2011 more than 40% of the Romanian population was not connected to the public water supply and even more to the wastewater system. In the present study raw data were analyzed and plotted to show the evolut...
Autori: Stefan-Adrian Strungaru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27911

The paper presents a methodology for determining the conditions in which the liquid phase occurs in the transported natural gas. This methodology allows fast and accurate determination of the phase in which water can be found in natural gas transmission pipelines and also the possibility to highlight the points in the transmission system in which water is in liquid state. A complex function which can describe the phase behavior of water from natural gas has been defined by processing the phase e...
Autori: Sorin Neacşu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27970

Little is known about the degradation kinetics of sewage sludge, sanitized with Ca(OH)2, in soil. Thus, this work aimed to monitor the degradation of limed sludge, under field conditions, when applied on soil surface or incorporated into the soil. The limed sludge was applied in dystrophic Inceptisol at a dose of 500 kg ha-1 yr-1 of total nitrogen. The mineralization process in the soil was monitored for 131 days. Samples of organic material were collected for analysis of total and easily oxi...
Autori: Isabela Diniz
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27995

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 release of metals from many industrial processes into aquatic ecosystems is currently a major environmental threat, especially in developing and emerging countries. Most traditional treatment approaches are not efficient in terms of removal yield and cost. Plants have the ability to stabilize metals in a fast and cost-efficient way. In this context, aquatic plants are successfully applied for remediation of hazardous elements from industrial wastewater. This study demonstrates the capabil...
Autori: Hosam M. Saleh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28020

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

Extracts of Bifurcaria bifurcata seaweed were obtained by diverse conditions. Different extraction techniques, such as hydrothermal and ultrasounds, and three different solvents (water, ethanol and water/ethanol (50:50)) depending on technique were used. Moreover, supercritical CO2 (SC-CO2) with 10% of ethanol as co-solvent using different extraction times (30, 45 and 60 min) was also used as extraction technique. Extraction yield, phenolic content and antioxidant activity were measured for e...
Autori: Rubén Agregán
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28039

Due to emissions from power station using fossil fuels, the decrease of existing pollution as well as of operational costs should be taken into consideration, when resolving environmental economic dispatch problems. In this research, we will evidence that nonlinear constraints of generating units, forbidden regions, and ramp-rate of generating units will reduce operational costs and environmental pollution, to achieve environmental economic dispatch effectiveness, by employing an improved mul...
Autori: Daqing Wu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28045

Dust explosions are one of the main causes of mining disasters. To avoid them, it is important to understand how they are propagated. In the study reported here, computational fluid dynamics software was used to model a 3D diagonal pipe network then simulated a dust explosion at its inlet to examine its propagation characteristics. The initial conditions, boundary conditions and parameter settings were detailed description in the simulation to analyze possible propagation characteristics, assess...
Autori: Baichao Song
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28067

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

Growth rate and biomass yield in the case of Arthrospira platensis depend on nutrient availability, temperature and light, which can determine changes in the metabolism and therefore in the biomass composition. The aim of this study is to evaluate the behavior of A. platensis during the growing time in several liquid culture media and their influence on the yield of biomass production. The following culture media have been investigated in this sense: ARS, Zarrouk (Z), modified Zarrouk (MZ), eco...
Autori: Mariana Diaconu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28163

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

At the construction of a bridge in the riverbed, the water flow section is usually reduced due to the placement of the piles and abutments of the bridge between the banks. How the water flow change depend on the flow regime (fast-supercritical or slowsubcritical) existing in the river in the absence of the bridge. Of interest is the change of the water level in the section of the bridge and upstream of the bridge. The water level may rise or fall depending on the flow regime (slow or fast) and t...
Autori: Costel Boariu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28215

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

The quality of drinking water can be kept under control through the protection of raw water sources and the permanent monitoring and control of the processes of treatment and distribution of drinking water. The dangers and risks faced by drinking water supply systems may arise from inside or outside the system. Water disinfection is the key element behind obtaining and maintaining quality. Chlorine is the most widely used disinfectant, due to its high efficiency. However, it has a major disadvan...
Autori: Alice Iordache
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28254

The treatment of acidic wastewater of copper sulfide produces a huge amount of sediment, which can be processed into the planting matrix for ecological restoration of mines. This paper attempts to screen out the plants suitable for the acidic wastewater sediment, laying the basis for ecological restoration of mines. Therefore, 14 plant species were selected for preliminary tests on survival rate and growth tests in sediment pond. The survival rates and growth conditions of each plant species in...
Autori: Jinchun Xue
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28268

As one of China’s fastest growing regions, Beijing–Tianjin–Hebei (B-T-H), which contains one of the most intensive logistics networks in China, developed rapidly from 2005 to 2016. However, such growth also led to increases in energy consumption and carbon emissions. From 2005 to 2011, the growth rate of logistics carbon emissions in the B-T-H was maintained at 8%–10%. Subsequently, owing to policies and technological progress related to energy saving and emission reducti...
Autori: Jianfeng Zhao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28274

The micro-evidence of the relationship between environmental protection and economic growth is still at the level of descriptive research and case analysis, and it is difficult to reflect the overall relationship between environmental pollution status and enterprise development models. This paper analyzes the sales growth model of industrial enterprises in Hubei Province by using micro data of industrial enterprise observations in 2004 and industrial sales growth rates of 2005-2009, and analyzes...
Autori: Yan Hua Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28280

Focusing on 199 Chinese cities at or above prefectural level, this paper mainly explores the interaction mechanism between urbanization and carbon emissions in China from 2003 to 2016, and evaluates the benefit and cost of different carbon reduction measures. Specifically, an econometric model was established based on simultaneous equations, and estimated by the generalized method of moments (GMM). The results show that: every 1% increase in the urban percentage of population boosts the gross do...
Autori: Jiajia Li
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28283

The Urban Tool for Air Quality (UTAQ) is a project funded by CAMS (Copernicus Atmosphere Monitoring Service) - ECMWF (European Centre for Medium-Range Weather Forecasts). UTAQ is a web-based tool with a user-friendly interface that allows users to evaluate current and forecasted air quality for the following 4 days at urban scale with high resolution (10-50 m). UTAQ, in the mobile version, allows citizens to evaluate and then to limit their air quality exposition thanks to the personal position...
Autori: Fabrizio Ferrari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28312

Zinc oxide and strontium doped zinc oxide nanoparticles were synthesized through hydrothermal route. The synthesized nanoparticles were characterized by UV, FTIR, SEM, X-Ray diffraction (XRD) and energy dispersive x-ray (EDX) spectroscopic techniques. The optical band gaps were calculated to be 3.16EV and 2.90EV for ZnO and Sr-ZnO nanoparticles, respectively. FTIR confirmed the incorporation of the Sr into ZnO nanoparticles. Average particles size of undoped ZnO and Sr-doped ZnO nanoparticles wa...
Autori: Fazal Akbar Jan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28323