Contine urmatoarele articole:??Â?Â? Alternative energy sources in transition countries. The case of bioenergy in Ukraine??Â?Â? Catalytic destruction of aromatic VOCs on SCR-DeNOx commercial catalyst??Â?Â? Ecological Economics And Transport Systems??Â?Â? Bioleaching of uranyl ions from uranium ores by some algae??Â?Â? Irreversible affinity immobilization of lentil seedling??Â?Â? Evaluation of artificial neural network techniques for river flow forecasting??Â?Â? Hydrogen and sustainable energy. Re...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25194

Abstract Hydrogen could be considered a synthetic secondary power carrier fuel in the years to come, subsequent to the fossil fuels economy. Thus the concept 'hydrogen economy' shall be defined, and it will also have a great influence in the future years.The field of power generation (producing electric power), transports, (electric cars), chemistry (hydrogen is a major raw material) are potential users of hydrogen.The experts support, by means of a series of economical and strategic analysis ma...
Autori: Corina Rădulescu, Elisabeta Păsculete, Florentina Condrea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25111

This paper brings a review on the trends of arc plasma reactors, in the new millennium, as an alternative contribution to the reduction of carbon emission at global level. The development of technically and economically feasible plasma processes for the production of hydrogen is analyzed. Literature provides data on achievable intensification of the involved chemical processes comparing with those from the classic reactors. The hydrogen production is studied starting from hydrocarbons and alcoho...
Autori: Iulian Rusu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25128

This study presents an evaluation of the catalytic performances of Fe containing clay-based catalysts for the wet hydrogen peroxide catalytic oxidation (WHPCO) of 4-chlorophenol (4-CP) aqueous wastes. The catalysts were prepared by well-established techniques, their properties being determined by DRX, BET and chemical analysis techniques. All the tests were performed on a laboratory scale set-up. The ion-exchanged clays were the most active catalysts (100 % 4-CP and 84 % COD removal for Fe-Mt) b...
Autori: , Cezar Catrinescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25157

Contain all the articles from this issueICEEM /01 PLENARY CONFERENCETen years of Environmental Engineering and Management education and research at the Technical University of IasiMatei Macoveanu, Carmen Teodosiu ICEEM/01  - Environmental Engineering SectionRemoval of nitrogen oxides from Diesel exhaust: Laboratory studies for development of an SCR-catalyst-system using solid urea as reducing agentWerner Weisweiler High temperature desulphurization of hydrogen sulphide containing ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25167

Contain all the articles from this issueBiosorption of Cu2+ ions from aqueous solution by Enteromorpha sp.Loredana Brinza, Matthew Dring, Maria Gavrilescu  Environmental impact assessment for steel processingBrindusa Robu, Carmen Zaharia, Matei MacoveanuEnhanced primary treatment of municipal wastewater by ion exchange and membrane processesDaniela Teleman, Peter A. Wilderer, Carmen Teodosiu, Thilo K?śtzle Best practices in kraft pulping - benefits and costs Dan GavrilescuAspects of waste m...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25177

Contain all the articles from this issueNitrous oxide decomposition over Fe-ZSM-5 catalysts prepared by different methodsMircea Teodor Nechita, Ioan Rosca, Daniel Sutiman, Gabriela Apostolescu, Ioan Iordache Geometrical correlation method for global estimation of the ecosystem stateCamelia Popa, Cornel Cojocaru, Matei MacoveanuImmobilized lipases as biocatalysts for organic synthesis 1. Transesterification of ethyl acetate with alcohols in the presence of free Candida antarctica lipase BBrindusa...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25181

Include urmatoarele articole:� Keynote Lectures Energy from municipal solid waste: large-scale incineration or small-scale pyrolysis?� Electrical properties of SnO2-Pt/Al2O3 in reduction atmosphere� Corporate management tools to address sustainability Challenges. A reflection on the progress and difficulties experienced during the last decade� Emerging academic responsibilities and opportunities for promoting regional sustainability� Challenges for integrated water resources management...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25200

? 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

AbstractA new photo-Fenton catalyst has been manufactured from synthetic layered clay laponite (Laponite RD) by the pillaring technique Eight different catalyst samples were prepared: four without thermal aging (WTA) calcined at 523 0K, 623 0K, 723 0K and 8230 K, and other four with thermal aging (TA) calcined at the same temperatures. The activity of the TA- 623 sample was evaluated in the phenol degradation by the photo - Fenton process. The influence of five important operating factors has be...
Autori: Beatrice Iurascu, Ilie Siminiceanu, Miguel Vincente
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25210

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

AbstractThe mineralization of acidic aqueous solutions with 0.166 to 1.333 mM Crystal Violet (CV) in 50 mM Na2SO4 as background electrolyte has been studied by the electro- Fenton method, where the oxidizing hydroxyl radicals were produced from the Fenton reaction between added ferrous ions and hydrogen peroxide generated at a oxygen- diffusion cathode. The influence of a new operating factor on the mineralization degree has been investigated: anode material (platinum versus boron doped diamond)...
Autori: Carmen-Ionela Alexandru, Eric Brillas, Ilie Siminiceanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25229

AbstractLaboratory scale experiments were conducted in order to investigate the photolysis of Reactive Blue 19 (RB 19) dye using UV as the irradiation source in alkaline solution. The effects of operating parameters such as, pH, initial dye concentration, UV dosage, hydrogen peroxide and oxygen have been evaluated. The results indicate that the UV photolysis process in alkaline solution is ideal for decolorizing of RB 19 and it can be taken as a starting step to establish the economical feasibil...
Autori: Abbas Rezaee, Ebrahim Hajizadeh, Gholamreza Mosavi, Mohamadtaghi Ghaneian, Seyyed Jamalodin Hashemian
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25245

? 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

AbstractDark fermentation hydrogen production from a mixture of food components using two different methods of methanogenic inhibition (autoclaving and BES) and three different temperatures (37, 60, and 70 Â?C) was examined in batch assays for two different mixed anaerobic cultures - one suspended sludge (S) obtained from an anaerobic digester and one granular sludge (G) obtained from a brewery wastewater treatment plant. In general, BES-inhibition of sludge was more robust when compared against...
Autori: Angela A. Abreu, Anthony S. Danko, Francisco Pinheiro, Maria Madalena Alves
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25308

Include urmatoarele articole:� Biomass - A source of chemicals and energy for sustainable development � Equilibrium study of Pb(II) and Hg(II) sorption from aqueous solutions by moss peat� Wood-based epoxy resins and the ramie fiber reinforced composites� Studies on the interaction between birch veneer and compounds with biocide potential action� Effect of methanogenic inhibitors, inocula type, and temperature on biohydrogen production from food components� Energy from biomass in pul...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25313

AbstractIn the present work, composite membranes were developed for separation of hydrogen from its mixtures with other gases. The composite membranes were characterized by single gas permeation and scanning electron microscopy. Gas transport properties have been determined for four gases (H2, CH4, N2, CO2). The influence of cross-linking on transport was measured. H2/CH4 selectivity values up to 115 were obtained. The resulting membranes have a selectivity of H2/CH4 close to intrinsic selectivi...
Autori: Carmen Nistor, Marcel Popa, Sergey Shishatskiy, Suzana Pereira Nunes
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25339

Pollution with sources from towns and industrial centres affect considerable the ecosystem waters. An accumulation of nutrients favourable to the growth of certain tiny marine organisms called phytoplankton stimulates their rapid reproduction in the water.These plankton blooms appear as patches on the surface of the water. The consequence of this process is the diminishing of the amount of oxygen from water (in the process of decompose the algae), the decease of aquatic animal and the multiply o...
Autori: Laura Stefanescu, Laura Ungureanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25351

AbstractThis study deals with the radiolytical decomposition of water molecules, in the presence of some catalysts, getting out hydrogen as unpolluting and cheaper energy vector. Instead of the spent nuclear fuel elements taken out from nuclear power plants, as irradiation source it was used the 60Co radionuclide having a specific activity of 1.1.105 Ci. It was observed that the radiolytic yield of resulted molecular hydrogen from water radiolysis in the presence of used catalysts decreased as:N...
Autori: Ada Macovei, Alexandru Cecal, Dumitru Ganju, , Oana R. Haută
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25354

AbstractHigh proton conductivity of CsHSO4 opened new opportunities for applications as electrolyte in solid acid fuel cells (SAFC). Relatively recent, it was proved that the accommodation of this solid electrolyte by silica supports improves its proton conductivity. During this work, solid acid CsHSO4 and its composites with mesoporous silica of SBA-15 and MCF-types as host materials were synthesized and studied for the first time. Studies were mainly focused on the influence of mesoporous supp...
Autori: Adrian Ungureanu, Brindusa Dragoi, Emil Dumitriu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25366

Include urmatoarele articole:� CsHSO4/mesoporous silica composites - new electrolytes for solid acid fuel cells� Trend in exhaust emissions from in-use gasoline vehicles� Analysis of distribution of oxygen transfer rate in stirred bioreactors for bacterial broths� Electrochemical characteristics of Ti6Al7Nb alloy in Ringer's solution� Pulsed high voltage discharge technology as a new method for killing Hepatitis C virus (HCV) cells� Hydrodynamic modelling of pollution with LNAPL gene...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25367

â€? Bioremediation of contaminated air using a bioscrubberâ€? Quality risk evaluation of the groundwater resources on the moldavian areaâ€? Electrochemical characterization of some dental materials in accelerated environmental testingâ€? Preliminary study of simple and Fenton oxidation with hydrogen peroxide applied on final effluents from a zootechnical farmâ€? The environmental impact assessment caused by the dykes failureâ€? Revaluation of beer industry byproducts – medical implicationsâ€? ...
Autori: http://www.ecozone.ro/reviste.php?RID=25372

� Physiological changes in seedling germination and growth plant under chemical stress conditions� Studies on sorption and transport processes of cadmium in soils� Assessment of the anthropogenic impact on water systems by fluorescence spectroscopy� Research on the effects of soil improvement by fertilization on the quality of winter wheat� Halotherapy: From ethnoscience to scientific explanations� Study regarding the sorption of erythrosine from aqueous solution onto soil� Hydroxy...
Autori:
ISSN: 1582 - 9596
http://www.ecozone.ro/reviste.php?RID=25375

AbstractThe study presents the processing possibilities for marc resulted as still residue from the distillation of fermented fruits in view to obtain a compacted solid fuel. Initial marc composition (carbon, hydrogen, nitrogen, sulphur and oxygen contents) determined by elemental analysis is evidenced, as well as technical characterisation (ash and moisture contents) and ash's qualitative composition, chemical characterisation of the liquid phase (pH, total phosphorus, acidity and conductivity)...
Autori: Daniela Simina Stefan, Anca-Ileana Penu, Mircea Stefan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25391

Abstract The paper presents the preliminary experimental results performed at laboratory scale set-up for different combined mechanochemical treatments of final effluents from a zootechnical farm from the central Moldavian region of Romania. Because of the high content of pollutants into wastewaters, the soil can be polluted and also the ground waters. To avoid this soil pollution episode, some combined mechano-chemical processes were studied and applied into a specific technological order as...
Autori: Carmen Zaharia, Mioara Surpăţeanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25434

Abstract Spent hydroprocessing catalysts from petroleum refining industries have been classified as hazardous wastes due to their content in heavy metal and persistent organic pollutants (POPs). The aim of our paper determine the polycyclic aromatic hydrocarbons (PAHs) residues contents in spent catalysts samples from four different units of the Romanian refinery Rompetrol Rafinare,Constanta: Hydrogen (H), Gas Desulfurization Sulfur Recovery (GDSR), Hydrofining Turbojet Kerosene (HTK) and Pet...
Autori: Camelia Draghici, , , Gabriela Stanciu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25449

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

Abstract Electroflotocoagulation is used for the treatment of liquid wastes of various origins, containing suspended matter. The metal hydroxide formed by electrochemical metallic ions generation acts to aggregate the colloidal impurities, and the hydrogen bubbles evolved at the cathode allow flotation of foam containing the impurities. The aggregates formed (containing the impurities) and lifted above the solution can then be removed. Electroflotocoagulation (simultaneous electrocoagulation ...
Autori: Marius Constantin Mirica, Mirela Ioana Iorga, Adina Segneanu, Ionel Balcu, Doru Buzatu, Cristian Vaszilcsin
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25457

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

Abstract The textile wastewaters have a diverse composition depending both on the used raw materials and applied manufacturing technologies. These wastewaters may contain various pollutants such as organic compounds (e.g. residual dyes), suspended solids, metal ions etc. Most of dyes are synthetic compounds with aromatic molecular structures and non-biodegradable. The oxidative destruction via homogenous oxidation processes with hydrogen peroxide (simple chemical oxidation with H2O2 or advanc...
Autori: Carmen Zaharia, Daniela Suteu, Augustin Muresan, Rodica Muresan, Alina Popescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25570

Abstract The present paper proposes an integrated-treatment process of leachate from a municipal landfill, which involves two treatment steps. The first step consists in diminishing the organic content through an advanced oxidation process using ozone and hydrogen peroxide. The second step is performed in order to diminish the content of heavy metals through a sorption process on a natural low-cost biosorbent, thus the traces of organic substances remained after oxidative degradation or oxida...
Autori: Carmen Paduraru, Corneliu Pohontu, Igor Creţescu, Lavinia Tofan, Marius Sebastian Secula, Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25589

Abstract In the last decades there has been a rapid evolution of techniques for production of bleached pulp. Much of these processes have been environmentally driven. New techniques have been developed in order to replace chlorine-based reagents in producing bleached pulp. Reducing the environmental impact of pulp production can be attain by using non-pollutant bleaching reagents like oxygen and related compounds. This paper deals with present findings and general trends in environmentally-s...
Autori: Adrian Catalin Puitel, Alexandru Botar, Dan Gavrilescu, Gheorghe Dutuc, Grigore Craciun
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25592

Abstract Chlorophenols were selected for this study because most of them are toxic and difficult to biodegrade. They represent a particular group of priority toxic pollutants listed by the US EPA in the Clean Water Act and by the European Decision 2455/2001/EC. The efficiency of advanced oxidation processes for degradation of chlorophenols has been extensively documented. The catalytic wet hydrogen peroxide oxidation process, involving oxidation with H2O2 and solid catalysts in mild reaction ...
Autori: Brindusa Dragoi, , Cezar Catrinescu, Daniela Arsene
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25601

Abstract In this study the possibility to apply the oxidation process for treating textile effluents, by using hydrogen peroxide and Fenton process was evaluated through determining the color and chemical oxygen demand (COD) removal. The experimental variables studied include the dosages of hydrogen peroxide and iron salts, oxidation time and pH value. The result showed that oxidation process using hydrogen peroxide alone is inefficient in COD and color removal, since only 25 % of COD removal...
Autori: Abdelnaser Omran, , Marniyanti Mamat Noor
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25631

? POLLUTION PREVENTION, A KEY TO ECONOMIC AND ENVIRONMENTAL SUSTAINABILITY ? A COMPARISON BETWEEN DIFFERENT SCENARIOS OF ROMANIAN MUNICIPAL SOLID WASTE TREATMENT BEFORE LANDFILLING ? A STUDY ON ENERGY CONSUMPTION IN ROMANIA ? ENVIRONMENTAL INFLUENCES ON STRESSED METALLIC SURFACES ? ASPECTS OF HYDRODYNAMICS AND MASS TRANSFER IN DIFFUSED AERATION SYSTEMS ? THE STATUS OF SOME SELECTED HEAVY METALS IN ROADSIDE SOILS OF BURSA PROVINCE, TURKEY ? PREPARATION AND CHARACTERI...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25656

? STUDY OF BIODIESEL PRODUCTION FROM OILSEED PLANTS II. EVALUATION OF BIODISEL PRODUCTION FROM SOME CULTIVARS OF RAPES ? STUDY OF BIODIESEL PRODUCTION FROM OILSEED PLANTS I. EVALUATION OF THE GENETIC SIMILARITY OF SOME Brassica Napus CULTIVARS USING RAPD MARKERS ? STRUCTURAL CHARACTERIZATION AND IN VITRO CYTOTOXIC POTENTIAL OF COAL DUST IN A ROMANIAN POWER PLANT ? MUNICIPAL SOLID WASTE MANAGEMENT IN BENGHAZI (LIBYA): CURRENT PRACTICES AND CHALLENGES ? COMPARATIVE ENVIRONM...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25661

Hydrogen production via biomass steam gasification and partial oxidation is analyzed from exergy aspect. Based on cypress sawdust gasified from 800°C to 1200°C, the exergy value of H2 from steam gasification rises from 1410.80 kJ kg-1 to 7922.89 kJ kg-1, while that from partial oxidation increases from 988.30 kJ kg-1 to 3097.81 kJ kg-1. The exergy efficiency of H2 from biomass also increases for both steam gasification (6.42–36.08%) and partial oxidation (4.50–14.11%). However, the exergy ...
Autori: Yaning Zhang, Bingxi Li, Hongtao Li, Bo Zhang, Hui Liuhttp://www.ecozone.ro/reviste.php?RID=25693

Abstract:The paper presents the influence of different WO3:TiO2 ratios on the photocatalytic and photoelectrolytic properties of the films.The investigations are focused on the morphological (Atomic Force Microscopy, Contact angle), compositional (X-raydiffraction), optoelectric (conductivity, photocurrent) and photocatalytic properties of titanium dioxide films mixed with tungstenoxide. The most important application of these layers is in wastewater purification and hydrogen production using ap...
Autori: Alexandru Enesca
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25743

Abstract:One of the basic conditions for the operation of nuclear installations is security operation. The complexity of the phenomena inheavy water detritiation plants, determine the use of advanced equipment for technological processes involved. Pilot Plant forTritium and Deuterium Separation developed the cryogenic technology of tritium separation from tritiated heavy water. Theprocess is based on an catalyzed isotopic exchange module, where the tritium is extracted from tritiated heavy water...
Autori: Sorin Gherghinescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25787

Abstract:This study is focused on the influence of Co and Cu ions located in Zn/Ni/Al matrix on the structural, textural and catalyticproperties of layered double hydroxides (LDHs). The samples were prepared by co-precipitation (Ni2+/Co2+(Cu2+)=0.25;M2+/M3+=2)) at low super-saturation and afterwards characterized by XRD, nitrogen physisorption, thermogravimetry, FT-IR, DRUV-Vis and TPR. The XRD results show that the resulted solids are well crystallized and contain only pure phases of LDHs.Also,...
Autori: Adrian Ungureanu, Alexandru Chirieac, Brindusa Dragoi, Emil Dumitriu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25789

The purpose of this study was to prepare new nanocomposite catalysts of Metal/LDHs type by mild reduction of transition metal cations Co2+ and Cu2+ substituted in the matrix of ZnAl-LDH at 150°C and atmospheric pressure, under hydrogen flow. To this end, a series of ZnCuCoAl layered double hydroxides (LDH) precursors were synthesized by co-precipitation method. M2+/M3+ (i.e., Zn2+/Al3+) molar ratios were kept constant while the Cu2+/Co2+ molar ratios were varied in order to investigate their in...
Autori: Adrian Ungureanu, Alexandra Sasu, Alexandru Chirieac, Alina Moscu Corcodel, Brindusa Dragoi, Constantin Rudolf, Emil Dumitriu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25852

Four processes have been used to enhance the ozonation of phenol in water: I-pH increasing (O3-pH), II- hydrogen peroxide addition (O3- H2O2), III- UV irradiation (O3- UV), and in the presence of both H2O2 and UV; IV-(O3- UV- H2O2). In each of these processes the rate of phenol degradation has two components: direct and indirect....
Autori: Eszter Arany, Ildiko Bartalis, Ilie Siminiceanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25904

AbstractPolyvinyl alcohol (PVA) is a typical refractory organic pollutant with low biodegradability and high molecular weight. Thispaper presents data on the radiolysis of PVA in aqueous solutions by using ionizing radiation. Response surface methodologywith Box-Benhken design of experiment was applied to analyze the interactions among initial concentration of PVA, absorbeddose, and initial pH of aqueous solutions on PVA removal efficiency. 9.4-89.4% PVA was removed based on differentcombination...
Autori: Jianlong Wang, Jinping Tian, Lujun Chen, Shijun He, Weihua Sun
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25967

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

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

AbstractThere are many treatment methods used to remove color from textile wastewater, and Fenton oxidation, a well known AdvancedOxidation Process is one of the most efficient. Apart of Fe(II), other metal ions have been used as catalysts in Fenton’s Reagent,and Cu(II) proved to be a good alternative.In this study the effect of the concentration of dye, catalyst and hydrogen peroxide were studied and optimized for thediscoloration process of Reactive Black 5 using a Fenton-like process, H2O2/Cu...
Autori: Andrei-Petru Bertea, Armand-Florin Bertea, Romen Butnaru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26042

AbstractThere are a quite large number of studies published in the last decade, dealing with the possible pass of the human society to thehydrogen-based energy. The efforts made by researchers all around the world, in order to bring technical solutions, seemremarkable, but at global level only minor progresses were made toward this major change. Furthermore, most of studiespredicted a fuel crisis, but not a possible economical crisis with significant effects on the developing renewable energytec...
Autori: Ştefan Stanciugelu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26099

The book edited by Haibo Xie and NicholasGathergood focuses on one of the most importantscientific issues of the 21 century which is thereplacing fossil fuel with sustainable alternatives suchas biomass. Fossil fuels are conventional rawmaterials for many industrial sectors includingchemical and energy production. Usage of fossil fuelis limited by their availability, price and carbonfootprint. Biomass is a renewable resource globallyavailable, cheaper and carbon sequestering. Step bystep shiftin...
Autori: Adrian Catalin Puitel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26101

AbstractIn the conventional water flooding process of Daqing Oilfield in China, the occurrence of abundant sulfate-reducing bacterialpopulations has substantially affected the industrial production. This study was conducted from the perspective of ecologicalsuppression by operating anaerobic ABR reactors and dosing ecological inhibitors in a continuous-flow experiment. The practicaloperating efficacy was investigated and associated dynamic bacterial population succession was analyzed. Results sh...
Autori: Bin-song Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26165

AbstractIn this study, as part of developing a green recycling process of spent lead-acid battery that can avoid both smelting and electrowinning, leaching agent citric acid and other additives (such as sodium citrate and hydrogen peroxide) in aqueous media were reacted with spent lead-acid battery paste. PbO, PbO2 and PbSO4, which are the three main components in a spent lead-acid battery paste, were leached to form lead citrate precursor which was crystallized and then separated from the solut...
Autori: Xinfeng Zhu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26215

AbstractWastewater sludges are organic and nutrient-rich materials that could be used to improve soil tilth. However, the land applicationof sludge needs to be properly managed to avoid the detrimental effects on micro and macroorganisms in the soil. Earthwormsare one of the most important soil macroorganisms. Addition of sludge to the soil environment may impact earthworm activity,and in turn, soil productivity and health. In this study, sludge from the canned food industry was added to soil mi...
Autori: Efsun Dindar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26238

AbstractA pilot scale Upflow Anaerobic Filter (UAF) treating tannery wastewaters was operated for 160 days. The UAF was fed with lowCOD/SO42- ratio (SO42- = 1810 mg L-1, CODtotal = 2530 mg L-1) for the investigation of sulphate and COD removal as a functionof substrates limitation and ammonia and sulphide inhibition. Sulphate-reducing bacteria (SRB) out-competed methanogenicbacteria due to the low influent COD/SO42- ratio, the high concentration of sulphide and the presence of inhibiting compoun...
Autori: Alberto Mannucci, Claudio Lubello, Giulio Munz, Gualtiero Mori
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26353

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

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

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

AbstractThis study aims to understand the acid-leaching behavior of metals from 2 to 4 mm waste printed circuit boards (WPCBs)containing 22.0% ą 1.1 Cu, 6.7% ą 0.2 Ca, 0.68% ą 0.02 Sn, 0.59 ą 0.01 % Pb, 2.71% ą 0.08 Al, 0.22% ą 0.01 Fe, etc..Copper leaching was increased for sulfuric acid concentrations up to 1.2 mol/L and hydrogen peroxide concentrations of 10.0vol% for a pulp density of 100 g/L at 50°C over 4 h, whereas for the same concentrations of sulfuric acid and hydrogen peroxidecopper l...
Autori: Manoj Kumar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26566

AbstractThe CO2 electroreduction in gas phase using Pt on carbon black catalysts is investigated in this work. This process is expected tobecome a key technology to prevent anthropogenic CO2 emissions. Specifically, the electrocatalytic reduction in a solventless gasphase is studied, as a first approach to later develop a photoelectrocatalytic device for the efficient conversion of CO2 to fuelsusing solar energy for the reaction. The objective of this preliminary work has been the tuning up of t...
Autori: Fabiola Martínez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26578

AbstractThe potential application of methemoglobin from bovine blood to remove aromatic compounds in the presence of hydrogenperoxide has been evaluated. The organic compounds herein tested include phenols, amines or hydrocarbons, which arepollutants deriving from different industries and display high persistence and toxicity in waters. The oxidative process has beencharacterized by soluble hemoglobin and immobilized on Eupergit CM, using 4-chlorophenol as a model substrate. Theobtained ...
Autori: María Teresa Pérez-Prior
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26580

Abstract Copper nanoparticles were successfully synthesized on polyether-functionalized mesoporous silica to investigate the effect of metal loading (10, 25 and 35 wt. % Cu) on their structural and catalytic properties. The oxide forms of these nanocomposite materials were thoroughly characterized by nitrogen physisorption, SAXS, WAXS, TEM, EDXS, and TPR, whereas the metallic forms were analysed by N2O chemisorption. The results indicated that the mesostructured SBA-15-like hybrids favoured ...
Autori: Constantin Rudolf
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26653

Abstract Magnetic contamination is considered more and more as a challenging issue related to biosphere pollution with magnetic materials originating in natural and artificial sources (volcanic eruptions and respectively industrial activities that contributed to iron and other metal compounds spreading in air, water and soil). Aiming to study the impact of magnetic metal ions such as iron and cobalt on the metabolism of some environmental microorganisms, in this paper an experimental simulat...
Autori: Lacramioara Oprica
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26675

Abstract Nowadays, an efficient wastewater management involves the use of advanced treatment technologies able to decompose hardly biodegradable compounds with reasonable costs at the lowest possible environmental impact. In our work we used one of the most efficient advanced wastewater treatment, the Fenton reaction and its photo-assisted version. The hydrogen peroxide was the oxidizer; despite its relatively high cost, its high activity in oxidizing of a large variety of organic persistent...
Autori: Vasilica-Ancuta Simion
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26677

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

Abstract The use of hydrogen in spark ignition engines as a supplementary fuel can enhance combustion and reduce toxic emissions. Difficulties in hydrogen storage and production limit its use in internal combustion engines. This paper investigates the performance of a spark ignition engine with the addition of a mixture of hydrogen (H2) and oxygen (O2) into the intake manifold. Hydrogen is produced by an alkaline electrolyser and consumed simultaneously to eliminate the need for a storage de...
Autori: Yasin Karagöz
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26685

Abstract The effect of goethite addition, hydrogen peroxide concentration, initial pH, hydroxyl radical scavenger and initial dye concentration on the decolorization of Orange II by Fenton-like process was investigated. The results showed that the decolorization rate increased with goethite addition and hydrogen peroxide concentration, but decreased with the increase of initial dye concentration. There existed an optimal initial pH to achieve the highest decolorization rate. The presence of ...
Autori: Hui Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26693

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

Abstract Particle size distribution is one of the most influential factors of most soil physical and even some soil chemical characteristics. As modern measurement techniques are being introduced, the need for comparing new methods with older methodologies arises because comparability means data continuity. Here, three institutes conducted a comparison of particle size measurement among the laser, areometer and pipette techniques. The purpose of the comparison was to a) discover any differen...
Autori: Csaba Centeri
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26733

Abstract The paper describes a numerical analysis concerning the behaviour of Cu and Ni based catalysts having different mole ratios of Ni to Cu in the process of glycerol hydrogenolysis. The impregnation technique was used to prepare the copper and nickel based catalysts. Our study revealed that their performances are different and depends on the Ni/Cu ratio. The catalysts were tested using various reaction conditions, such as time and temperature, and their performances analysed based on t...
Autori: Adriana Marinoiu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26843

Abstract A study of a classical BLEVE fireball model associated with a toxic Puff release one was made in order to evaluate the influence of accident conjugate conditions on its consequences in two neighbouring industrial plants. The possible occurrence of the Domino effect is also exemplified for the approached chemical complex including two sensitive neighbouring chemical plants including tubular reactors for catalytic oxidation of butane to maleic anhydride and catalytic hydrogenation of ...
Autori: Hasan Hadi Salman Khwayyir
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26880

Abstract Much attention is paid to removing formaldehyde from indoor air to decrease the health risk for urban inhabitants since formaldehyde is a main indoor pollutant causing various symptoms. In this study, formaldehyde removal by the shoots of potted Chlorphytum comosum (spider plant), Epipremnum aureum (golden pothos) and Aloe vera (aloe) was investigated with a dynamic chamber technique. The results indicated that the order of formaldehyde removal capacities for the plant shoots was C....
Autori: Haiping Hou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26908

This paper presents municipal solid waste (MSW) responsibility and management structure in Sinop, Turkey together with the current situation of collection, recycling, transport and disposal of MSW. In order to examine the MSW management, a longterm study was conducted between 1994 and 2010. In this study, physical composition of MSW was determined. Proximate analysis (moisture content, density and calorific value) and ultimate analysis (carbon, hydrogen, oxygen, nitrogen, sulfur and ash) of ...
Autori: Nurdan Gamze Turan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26925

The study aims to identify important challenges that the practitioners and researchers in wastewater collection systems are facing in order to reduce the emissions of hydrogen sulphide and greenhouse gas emissions. Based on literature review, it identifies the main technologies used for avoiding and removing odorous compounds from wastewater gas streams. The paper also highlights issues pertaining to the emission and biofiltration of hydrogen sulphide, methane and nitrous oxide from sewage co...
Autori: Iulia Carmen Ciobotici Terryn
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26984

The renewable sources of energy represent a viable alternative for satisfying the energetic needs of humanity in case the fossil fuels reserves are exhausted, which is estimated to occur in maximum 25 years if the current rate of exploitation is maintained. Nowadays, there are several concerns about the valorization of the energetic potential of these resources (wind, water flows, solar, geothermal energy etc.), but also a series of extremely beneficial practical uses (i.e. wind parks, photov...
Autori: Daniela Suteu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26989

The release of low molecular weight (LMW) organic acids under lead (Pb) and zinc (Zn) stresses in Typha latifolia (T. Latifolia) and Vetiver zizanioides (V. zizanioides) were investigated. In addition, changes in antioxidative enzymes: superoxide dismutase (SOD) and peroxidase (POD) in the leaves of T. Latifolia under Pb stress were also examined. Amongst the eight types of LMW organic acids detected in the present study, oxalic acid was found to be the most dominant during Pb and Zn treatmen...
Autori: Yu Bon Man
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27092

The present study investigates the effect of addition of calcium hypochlorite in the titanium dioxide (TiO2) mediated degradation of bio-recalcitrant wastewater from pharmaceutical industry. The degradation studies were carried out in photoreactor irradiated with ultraviolet (UV) light at 365 nm under slurry mode. The reduction in chemical oxygen demand (COD) was estimated as an index of degradation. The influence of process parameters viz., catalyst dose, pH, oxidant concentration and source...
Autori: Amit Dhir
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27097

In this study, the potential for biogas production from biodegradable bioplastics was evaluated. Mater-Bi® (a family of maizestarch based flexible films) and PLA (PolyLactic Acid; a rigid, polylactide-based, polymer) bioplastics were digested in laboratory batch reactors, alone or in co-digestion with pig slurry or scotta (partially deproteinized cheese whey), at 35°C or 55°C. Methane (CH4) and hydrogen (H2) production were monitored during the incubation period. Maximum CH4 (Mmax...
Autori: Ciro Vasmara
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27134

An electro-Fenton process was carried out using undivided cell containing tridimensional graphite felt cathode for treatment of real textile wastewater. The study is essentially focused on effects of pH, applied current and transition metal types (Fe2+ and Cu2+) as catalysts on the electrochemical degradation efficiency based on color and COD removal and BOD5/COD value. The results indicated that pH 3 and applied current of 150 mA are the optimum conditions for decolorization and COD removal of ...
Autori: Akbar Eslami
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27167

Safe utilization of fly ash (FA) and reclamation of sodic soils are important environmental problems. In this study a field experiment was carried out with Vigna radiata L. crop using fly ash (FA) and phosphogypsum (PGY) as amendments in sodic soil during 2011 at Lucknow, Uttar Pradesh, India. V. radiata L. was sown in sodic soil amended with press mud (10 t ha-1) considered as control. Besides, 10 and 20 t ha-1 doses of FA and PGY were considered as other four treatments, respectively. The grow...
Autori: Kripal Singh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27180

This study was carried out to (1) investigate the potential of in-vessel solid-state anaerobic acidogenic co-digestion of high solids containing substrates, namely organic fraction of municipal solid waste (OFMSW) and cow manure and (2) examine the feasibility of using leaching bed reactors (LBR) for hydrolysis/liquefaction and acidification of OFMSW and cow manure mixtures for maximum total volatile fatty acid (VFA) and alcohol production. Results indicated that hydrolysis efficiency of 20-25% ...
Autori: Tuba H. Erguder
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27186

Catalysts based on nanocrystalline Mg-Zn ferrites supported on commercial alumina were prepared by in situ sol-gel auto-combustion technique. The as-obtained materials were characterized using Fourier Transform Infrared Spectroscopy (FT-IR), X-ray diffraction (XRD), atomic force microscopy (AFM) and Brunauer-Emmett-Teller (BET) specific surface area measurement. These materials were tested as catalysts for hydrogen peroxide decomposition and phenol oxidation reactions. The catalytic activity of ...
Autori: Tamara Slatineanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27192

In this study, S-TE pretreated mariculture organic waste (MOW) was used as substrate. Acid, alkaline, S-TE, sterilization and microwave pretreated waste sludge was used as inoculation respectively. The highest hydrogen yield of 22.02 ml H2/g COD (chemical oxygen demand) was obtained from MOW with sterilization pretreated inoculation at mesophilic conditions in batch reactors. The impacts of different pretreatments on the changes of soluble chemical oxygen demand (SCOD), protein, carbohydrate, pH...
Autori: Liang Guo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27193

The present work reports the gaseous emissions of the following industries, Interloop Textile (IP Tex), Crescent Textile (CT Tex), Kalash Textile (KH Tex), Noor Fatima Textile (NF Tex), Bashir Textile (BP Tex) and Hina Sana Texile (HS Tex), which are located in Faisalabad, Pakistan. Industries were tested for the mixture of gases containing carbon monoxide (CO), nitrogen oxides (NOx), sulphur oxides (SOx), carbon dioxide (CO2) and hydrogen (H2) emitting from these industries. The maximum amounts...
Autori: Muhammad Zubair
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27256

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

This study aims to evaluate the effects of Fe2+ present in carbonated natural mineral waters on the decomposition of hydrogen peroxide (H2O2) used as sanitizing agent of the collector water tanks and the oxidation of NH4+ to NO3– and NO2– nitrogen compounds from bottled carbonated natural mineral water by the Fenton process. This evaluation suggests that the distribution of the nitrogen compounds, at certain concentrations of H2O2 is influenced by facilitated Fenton reaction in the p...
Autori: Daniela Bogdan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27279

This study considers the removal of diclofenac (an important representative of pharmaceuticals and personal care products - PPCPs) from the secondary effluents of Iasi municipal wastewater treatment plant by means of different advanced oxidation processes (homogeneous Fenton, photo-Fenton and photolysis), carried out in a laboratory scale reaction system. The influence of three qualitative or quantitative factors (Fe3+ concentration, the absence/presence of UV-A radiation and H2O2) was studied i...
Autori: Cezar Catrinescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27322

The efforts to quantify gas emissions from wastewater handling have omitted the conveyance along sewers, lift stations, and manholes. This article compared the conventional system with the vacuum system based on sewer gas emissions. The goal of the study was to determine the emissions of methane, hydrogen sulphide, carbon dioxide and carbon monoxide at the level of the wet-wells of the conventional system and the exhaust of the vacuum system before and after the bio-filtration process by way of...
Autori: Iulia Carmen Ciobotici Terryn
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27326

The monomer with ketimine side group, 2-(1-(benzylimino)ethyl)phenol (2-BEP), was synthesized from the condensation of 2- hydroxyacetophenone and benzyl amine. The enzymatic oxidative polymerization of 2-BEP was performed in the presence of hydrogen peroxide using horseradish peroxidase (HRP) as catalyst. The oxidation reaction was carried out in various solvents and phosphate buffers at room temperature. These studies have shown that a dark brown polymer was successfully synthesized by utilizin...
Autori: Senem Tapan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27377

The kinetics of azo dye reduction based on combined effect of biochemical reduction by anaerobic mixed culture and chemical reduction with hydrogen sulfide was investigated. Hydrogen sulfide was produced by sulphate reducing bacteria existing in the anaerobic mixed culture. The effect of initial anaerobic biomass, initial substrate, and initial dye (Reactive Orange 107) concentrations on reduction kinetics were studied with batch assays. The municipal waste sludge was used as electron donating s...
Autori: Umay Gokce Ozkan-Yucel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27386

This paper reports an improved chlorolignin (CL) oxidative decolorization in alkaline media by the use of a heterogeneous system consisting of hydrogen peroxide and a silica [bis(dibenzoylmethido) copper II] (S1) catalyst. The catalytic functions of S1 in the presence of H2O2 were evaluated by comparing the chlorolignin decolorization in media with and without addition of catalyst. Since decolorization is associated with CL degradation, the pH variation and chloride release assays were carrie...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27448

The delignification of wood pulp using hydrogen peroxide and xylanase enzyme in an ultrasonicator was studied at different process conditions. The factors influencing the chemical delignification were studied simultaneously using the Box-Behnken design of experiments. The mathematical model for Kappa reduction as functions of consistency of the pulp, concentration of peroxide and the temperature of delignification was developed. The response optimization studies for minimizing the Kappa numb...
Autori: Palaniappan Ramesh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27480

This study undertakes to characterize through thermal analysis in dynamic conditions a wide range of building materials used for various types of insulation and presents for the first time a comparative analysis of their thermal stability. To this effect, the dynamic thermal analysis TG/DTG was applied. The results show a degradation resulting in one, two or three stages after a complex mechanism, with different mass loss, depending on the structure and atmosphere in which the thermal decomposit...
Autori: Andreea-Camelia Sprânceană
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27514

This study of the variation process of the chemical properties of eutric Cambisols on altitudinal levels, forest station subclasses and geomorphologic units, was based on soil analyses from 847 soil horizons gathered from 379 profiles. These profiles were distributed on Romania’s entire forest area. The average values of the eutric Cambisol’s chemical properties fit were within the known limits for this type of soil, but there were slight variations based on altitude, forest station ...
Autori: Gheorghe Spârchez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27522

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

This work describes the application of Fenton’s like system (H2O2/Cu2+) assisted by microwaves to the removal of phenolic compounds from olive mill wastewater (OMWs). The effect of various operating conditions, namely copper ion concentrations (X1), hydrogen peroxide (X2), time of irradiation (X3) and microwave power (X4) were evaluated by factorial design of experiments. Results showed that X1, X2, X3 and X4 had significant effects on the response followed by the interactions X1X2, X1X3, ...
Autori: Hamida Iboukhoulef
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27602

The effects of gas addition on efficiency and CO2 emission were investigated with a compression ignition (CI) engine and a spark ignition (SI) engine operating with hydrocarbons-based fuels. Hydrogen rich gas (HRG) provided by an electrolyze, was aspirated into the air stream inducted in the engine cylinders. Investigation was conducted at engine light and medium loads and speeds, with relative low concentrations of HRG. For the CI engine, HRG addition up to 12.5% energetic fraction in fuel lowe...
Autori: Gheorghe Niculae
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27606

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

α-cypermethrin is a pyrethroid and environmental genotoxic pesticide extensively used worldwide for agricultural applications. However, like other pesticides, it affects non-target organisms as well as target organisms and causes various toxic effects. To evaluate α-cypermethrin toxicity in non-target organisms, the effect of α-cypermethrin on the activity of malondialdehyde (MDA, an indicator of lipid peroxidation) content, antioxidant enzymes (superoxide dismutase, SOD; perox...
Autori: Ozkan Aksakal
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27647

Five indigenous soil microbes were isolated from chickpea rhizosphere soils of different location of Jaunpur, Mirzapur, Varanasi and Azamgarh district of eastern Uttar Pradesh. The microbial strains were identified as Pseudomonas aeruginosa BHUPSB01, Pseudomonas putida BHUPSB04, Bacillus megaterium BHUPSB14, Paenibacillus polymyxa BHUPSB16 and Mesorhizobium sp. BHURC05 by biochemical and molecular characterization. The isolated strains were tested for their plant growth promoting properties....
Autori: Jay Prakash Verma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27654

This paper presents an assessment of the toxic compounds released from metalworking fluids (MWFs) used in aluminum solid waste processing and from aluminum slag landfills, and their impact on environmental quality and human health. The mean concentrations of dust, oil mist, aldehydes, volatile organic compounds (VOCs) released from metalworking fluids were determined in machine shops. The exposure in machine shops was quantitatively dominated by VOCs, whose concentrations varied in the range...
Autori: http://www.ecozone.ro/reviste.php?RID=27677

Though Scirpus triqueter plays an important role in protecting the ecological functions of Yangtze River estuary wetland which is frequently contaminated by petroleum, knowledge is limited about the mechanisms involved. In this study, comparative analysis of soil properties, microbial community structure and soil enzymes in the rhizosphere of S. triqueter and bulk soil was conducted throughout one year to provide an insight into the phytoremediation mechanism in the field. The total petroleum hy...
Autori: Jing Wei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27697

This study emphasis the hydrogen fermentation from de-oiled Jatropha waste (DJW), a secondary and promising waste from biodiesel industry via influence of various combination of heat pretreatment using sewage sludge as inoculum. Batch experiments were carried out at a DJW concentration of 50 g/L, temperature of 55oC and an initial cultivation pH of 7. The peak hydrogen production rate and hydrogen yield of 16.3 mmol H2/L-d and 1.10 mmol H2/g volatile solids (VS), respectively, were obtained ...
Autori: Gopalakrishnan Kumar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27874

The catalytic hydrogenolysis of glycerol, a by-product of the biodiesel manufacturing process was studied on copper chromite catalysts with different chemical composition. The obtaining of propylene glycol was studied under mild reaction conditions (180- 240oC temperature range, 8 hours reaction time and moderate pressures). These important parameters have significant effects on the glycerol conversion and that is way the actual study was concerned to the obtaining of a superior selectivity t...
Autori: Adriana Marinoiu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27892

Advanced oxidation process is getting tremendous importance in the treatment techniques for the removal of nonbiodegradable organics from wastewater due to its ability to completely mineralize the pollutants. It uses different methods to produce hydroxyl radicals which are responsible for oxidation of pollutants. In this work, studies on Fenton, ultraviolet radiation (UV) and UVhydrogen peroxide processes for removing acetamiprid, a neonicotinoid insecticide from aqueous solution are carried ...
Autori: Puthenkattil Abdukunji Fasnabi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27895

In order to reduce Cr(VI) and Cr(III) simultaneously, a double microbial fuel cell (MFC) system was employed to treat Crcontaining wastewater. Cr(VI)-MFC used Cr(VI) as a catholyte to supply the generated power to Cr(III)-MFC, while the latter MFC functioned as an external load resistor of the former one. Buffer characteristics of the catholyte greatly affected the reduction of chromium ions. At an initial pH of 2.0, Cr(VI) removal increased from 49.9% to 99.9% when KH2PO4 was added. Keeping ...
Autori: Fang Li
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27896

In this work, we report a methodology to provide emission factors based on micro-reactor studies. We propose emission factors for ammonia (NH3, 158 mg/km), nitrous oxide (N2O, 322 mg/km) and molecular hydrogen (H2, 72 mg/km) for vehicles equipped with three-way catalytic converter (TWC). Our experimental conditions were similar to those prevailing on vehicles during catalyst light-off and transient urban driving cycle. NH3 and H2 emission factors reported in this work are quantitatively simil...
Autori: Gustavo Ariel Fuentes
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27899

Our research aims to establish the influence of Osmocote®Pro fertilizer on ornamental characteristics, photosynthetic pigments content, superoxide dismutase and peroxidase activities for Lillium regale species. The tests were organized in four variants, each with three replicates, each replicate consisting of 10 bulbs. The growth of plants in the four experimental variants was achieved without fertilization in case of the control variant (M) and under fertilization conditions with Osmocot...
Autori: Maria Brînză
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28005

This paper focuses on the effect of some water quality parameters of river water which helps in the calculation of water quality index (WQI) that culminates in the development of a regression model for prediction of WQI of the river system in India. The index was calculated by arithmetic index method using twelve various experimentally estimated water quality parameters such as potential hydrogen, chlorides, dissolved oxygen saturation, nitrates, sulphates, phosphates, total dissolved solids, bi...
Autori: Divya Airattil Haridas
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28065

Soils are influenced by stand composition and hydrological regime as well as by stress abiotic factors, including forest fires. As such, this study analyzed three stands affected by fires of different severities. Soil samples were gathered during the spring of 2017 from three sample areas in Vrancea County, eastern part of Romania. For each area studied, soil profiles were studied in 3 areas affected by fires and in control areas located close to each other. The soil respiration was determined b...
Autori: Aurelia Oneț
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28120

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

A numerical simulation was conducted to investigate the combustion characteristics and effects of Hydrogen-Hydrogen Oxygen (HHO) addition on performance and NOx emission of a spark ignition (SI) biogas engine. At a given operating condition, indicative work cycle Wi increases with increase of HHO, CH4 concentrations and load rate; but it decreases with engine speed increase and reaches peak value as variation of equivalence ratio and advanced ignition timing. Combustion temperature T and NOx con...
Autori: Bui Van Ga
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28204

This study investigates the mechanism and efficiency of catalytic ozonation process on iron-loaded rice husk ash (Fe-RHA) and Peanut shell ash (Fe-PSA) for the Erythromycin removal from aqueous solution. In the current study, the COD removal efficiency of Erythromycin was studied in simple ozonation and catalytic ozonation using Fe-RHA/O3 and Fe-PSA/O3 processes. The operational parameters such as pH effect, catalyst dose, and reuse performance of the catalyst were studied. Moreover, the hydroxy...
Autori: Shama Nazir
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28208

In this paper, we propose innovative solutions for reusing an inactive offshore gas platform and its associated infrastructures as a scientific research hub, where an integrated energy system and innovative environmental monitoring methods are envisaged. To this end, the Azalea A platform, located in the northern Adriatic Sea, is considered a good pilot site. This study analyzes the engineering solutions on Azalea A for the combined production of solar and wind energy coupled with hydrogen produ...
Autori: Ilaria Antoncecchi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28284

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