AbstractAromatic volatile organic compounds (VOCs) proved to have enhanced polluting behavior upon the atmosphere and human health. Their catalytic destruction is an alternative for environmental pollution reduction in the case of gaseous emissions with low contents of VOC.In this paper, an experimental study is presented, concerning the conversion of benzene and its mono-halogenated derivatives on SCR-DeNOx (V2O5-WO3/TiO2) commercial catalyst, specific for the reduction process of nitrogen oxid...
Autori: Florin Bandrabur, Heinz Koser, Ion Balasanian, Liliana Lazar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25105

AbstractDuring the transition to a market economy, many countries with a planned economy in Central and Eastern Europe face similar challenges when the established socio-economic systems and infrastructures deemed inefficient in a market economy. Also new issues are being raised by the trends of globalization and the vision of sustainable development. In the energy sector the challenges raised by the Kyoto Protocol and its implementation mechanisms are especially interesting, because they are in...
Autori: Andrius Plepys, Giulia Gervasoni, Jean-Philippe Boutin, Kes McCormick, Kristin Seyboth, Luis Mundaca, Marko Ratton, Patrick Lamers, Robert Hlep
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25104

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

AbstractThis paper reviews some practical aspects of the application of algal biomass for the biosorption of heavy metals from wastewater. The ability of different algal species to remove metals varies with algal group and morphology, with the speciation of specific metals and their competition with others in wastewater, and with environmental or process factors. The scattered literature on the uptake of heavy metals by both living and dead algal biomass - both macroalgae and immobilized microal...
Autori: Loredana Branza, Maria Gavrilescu, Matthew J. Dring
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25133

AbstractCatalysts having mobile electrons in bulk such as metals and semiconductors are good solid materials for red/ox type of reaction (oxidation) and can be effectively used in gas sensing devices as well. The aims of this work were: (i) to investigate the surface behavior of Pt(0.28%)/Al2O3 and SnO2(2.94%)-Pt(0.28%)/Al2O3 samples in inert atmosphere (He) and in reducing atmosphere containing helium-cyclopropane gas mixture under ambient condition (i.e., room temperature, atmospheric pressure...
Autori: , Cornel Munteanu, Jozsef Kovacs, Mariana Scurtu, Monica Caldararu, Tatiana Yuzhakova
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25146

Experiments in a Pilot Plant (PP) are extremely important and relevant for the substantiation of research. This is the way to set up the most suitable coagulation-flocculation reagents, optimum operating conditions (injection point, reaction times, etc.),compatibility with the processes at the actual Water Works and real possibilities for further improvement.The present work aimed at verifying the previously obtained results in laboratory under PP working conditions for optimizing the coagulatio...
Autori: Adina Pacala, Alina Anghelina, Dalila Marşavina, Ilie Vlaicu, Katalin Bodor, Mihaela Anghel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25156

AbstractThe mechanisms in the shaping of organic food in Denmark since the 1970'ies are analysed as a contribution to the discussion of strategies for a more sustainable production and consumption of food. The background is the major  achievements in Denmark within organic food since the 1970'ies, but also the recent years' reduction in the land converted to organic farming. The analyses are based on experiences from projects, analyses and literature and draw on innovation theory and theory...
Autori: Michael Sogaard Jorgensen
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25153

In recent years, the release of volatile organic compounds (VOCs) has received much attention. Catalytic oxidation of VOCs, found in small concentration in industrial gas emissions constitutes an alternative for environmental pollution reduction.In this paper, a comparative study regarding the non-catalytic and catalytic oxidative destruction of non-halogenated or halogenated C6 hydrocarbons (C6H14, C6H12, C6H6, Cl-C6H5, Br-C6H5), is presented. Catalytic oxidation was studied in the presence of ...
Autori: Florin Bandrabur, Heinz Koser, Ion Balasanian, Liliana Lazar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25162

Contain all the articles from this issueICEEM/01 -- Environmental Engineering SectionThermodynamic and kinetic study of gas desulphurization by adsorption on zeolites  Ion Untea, Dan Brasoveanu, Madeleine Dancila, Szidonia Bocskor Mixed oxides derived from vanadium substituted layered double hydroxides as catalysts precursors for SO2 oxidationGabriela Carja, Ionel Popa, Gabriela Ciobanu, Nicolae Aelenei The impact of energy production on environment in RomaniaCarmen Zaharia, Mioara Sur...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25168

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

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

AbstractThe paper presents new experimental results on the photodegradation of two important phenyl urea herbicides in water: Monuron and Isoproturon. The photodegradation was performed by two Advanced Oxidation Processes (AOPs): the homogeneous photo- Fenton process (, UV-H2O2 - Fe3+) and a heterogeneous photo - Fenton reaction using an iron pillared Laponide- RD catalyst (Fe-Lap-RD). The Fe-Lap-RD catalyst was prepared from iron nitrate 0.2 M solution and a suspension of Laponite - RD clay. Th...
Autori: Elsa Lundanes, Ilie Siminiceanu, Maria-Magdalena Bobu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25234

AbstractThe behaviour of three types of steel, with a variable carbon concentration (from 0.20 to 0.40 %) is studied in medium of ethylene glycol - 10 % methanol - 5 % succinic or adipic acid with water concentration varying between 1 % to 5 %. IR spectroscopy, Xray diffraction and chemical analysis were the methods used for corrosion compounds analysis. The weight losses were measured; also the polarization curves were plotted and the corrosion parameters were established. Based on the obtained...
Autori: Daniel Mareci, Daniel Sutiman, Ioan Iordache, Mircea Teodor Nechita
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25240

AbstractThe comparative study on reactive extraction of p-hydroxybenzoic acid with Amberlite LA-2 and D2EHPA in two solvents with different polarity (n-heptane and dichloromethane) indicated that the extractant type and solvent polarity control the extraction mechanism. Thus, the reactive extraction with Amberlite LA-2 occurs by means of the interfacial formation of an aminic adduct with three extractant molecules in low-polar solvent, or of an salt with one extractant molecule in higher polar s...
Autori: Anca-Irina Galaction, Dan Caşcaval, Maria Cămăruţ
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25250

AbstractThe crystallization of ferrierite/ZSM-35 zeolite at 180 Âą 50C in the presence of ethylenediamine as a structure-directing agent from reaction mixtures containing various active NaOH/SiO2 ratios has been studied. X-ray diffraction, scanning electron microscopy, TG/DTG/DSC analysis, nitrogen sorption measurements and temperature-programmed ammonia desorption were used to characterize the ferrierite/ZSM-35 solids. The XRD data reveal that the samples synthesized in optimized conditions are...
Autori: Ioana Droahna, Iuliean Asaftei, Nicolae Bilba
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25251

AbstractThe critical analysis of the transfer processes intensification techniques is carried out by identification of the methods that can be applied, regardless of the process nature. The main priority is the development of a consistent methodology that will represent the basis of specific practical methods development by establishing a theoretical frame for studying the heat transfer processes. The main purpose is to reduce the stationary time of the charge in the installation, accomplishing ...
Autori: Adrian Dima, Alina Adriana Minea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25253

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

AbstractThe study on distribution of oxygen transfer rate for a stirred bioreactor and simulated broths was carried out for four positions inside the broth and indicated the significant variation of kla on the bioreactor height. For all considered positions, kla initially increased to a maximum value with mixing intensification, decreasing then, as the result of the modification of mixing mechanism in presence of air bubbles. The increase of broth viscosity led to the significantly reducing of o...
Autori: Adina Segneanu, Anca-Irina Galaction, Dan Caşcaval, Radu Z. Tudose
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25270

AbstractThe corrosion resistance of three types of low-carbon steels in water-contaminated mixtures of adipic acid and methanol was investigated. The concentration of water in the organic mixture was progressively raised from 1% to 5%, while the carbon concentration in the steel samples varied from 2% to 4%. Infrared spectroscopy (IR) and X-ray diffraction (XRD) were used to investigate the insoluble corrosion products. Based on the weight losses measurements, on the polarization curves and on t...
Autori: Adrian Cailean, Daniel Mareci, Daniel Sutiman, Mircea Teodor Nechita
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25287

AbstractThis paper presents the connection between the heavy metals concentration in soil and their bioaccumulation in lettuce. Lettuce is a very good bioaccumulator of heavy metals and nutrients. In general, plants manifest a certain reaction to increasing the toxic metal concentrations in soil which they are cultivated on. The differences depend on plants sensitivity, and time exposure intensity (concentration of heavy metals, cultivation length, etc.), presence or absence of nutrients and oth...
Autori: Ana-Irina Smical, Elena Pop, Jozsef Juhasz, Vasile Hotea, Vasile Oros
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25299

AbstractWood-based epoxy resin was synthesized from resorcinol-liquefied wood. First, wood components were depolymerized and liquefied by reaction with resorcinol. The resorcinol-liquefied wood with plenty of hydroxyl groups could be considered as a precursor for synthesizing wood-based epoxy resin. Namely, the phenolic-OH groups of the liquefied wood reacted with epichlorohydrine under alkali condition. By the glycidyl etherification, epoxy functionality was introduced to the liquefied wood. Th...
Autori: Akira Fujita, Hajime Kishi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25310

â€? Photocatalytic properties of titania - fly ash thin filmsâ€? Study of the viscosity of some biodiesel – diesel oil blendsâ€? Aspects refering to technical and leaching properties of the secondary aluminium slags - cement compositesâ€? Studies regarding phenol and 4-chlorophenol sorption by surfactant modified zeolitesâ€? Cu-Ni nanostructured electrocatalysts obtained by electrocodepositionâ€? Molecularly imprinted poly (vinyl alcohol) films for the selective absorption of glycyrrhizinic ac...
Autori: http://www.ecozone.ro/reviste.php?RID=25373

â€? Photocatalytic properties of titania - fly ash thin filmsâ€? Study of the viscosity of some biodiesel – diesel oil blendsâ€? Aspects refering to technical and leaching properties of the secondary aluminium slags - cement compositesâ€? Studies regarding phenol and 4-chlorophenol sorption by surfactant modified zeolitesâ€? Cu-Ni nanostructured electrocatalysts obtained by electrocodepositionâ€? Molecularly imprinted poly (vinyl alcohol) films for the selective absorption of glycyrrhizinic ac...
Autori: http://www.ecozone.ro/reviste.php?RID=25374

Abstract Study of geopolymer is a developing field of research for capitalizing solid waste and by-products in the view of new materials achievement having characteristics necessary for using as cement substitute. Also, it provides a solution to many problems regarding environment, such as reduction of gaseous emissions and particles matter resulted from cement industry and raw materials economy. In this paper, the experimental conditions for obtaining new materials on the basis of fly ash f...
Autori: Maria Harja, , Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25419

Abstract The studies of Cu (II) adsorption were conducted by testing various sawdust types. Two biomass, oak sawdust wood (Querqus robur) and white poplar sawdust wood (Populus alba), have been compared considering their efficiency for copper removal from diluted water solutions. Raw sawdust proved no efficiency in adsorption. Therefore, pre-treatment processes were developed and optimized, to enhance the sawdust affinity for heavy metals adsorption. The optimized pre-treatment conditions are...
Autori: Dora Lucaci, Anca Duta
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25460

Abstract The use of fly ash (FA) in wastewater treatment received a lot of attention for the immobilization of heavy metal cations, mainly Cd2+, Pb2+, Ni2+, Zn2+, Cu2+. For an up-scalable wastewater treatment process, the substrate must have good adsorption efficiency and relatively constant behaviour. Modifying the fly ash surface can be a solution for reaching both goals. The use of FA for heavy metals removal, from wastewaters resulted in the dye finishing industry, faces a supplementary p...
Autori: Maria Visa, Anca Duta
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25471

Abstract The aim of this present paper is investigation of the reactions of preparation of unsymmetrical reactive carbonates from the corresponding symmetrical carbonates and different type of alcohols. The asymmetrical carbonates represent alternative reagents (mild, efficient) for alkoxycarbonylation of amines and amino-acids. The synthesized compounds were characterized by spectroscopic and chromatographic methods. A general method for preparation of asymmetrical carbonates was develop fro...
Autori: Adina-Elena Segneanu, Ionel Balcu, Marius Constantin Mirica, Mirela Ioana Iorga, Marius Milea, Zoltan Urmosi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25472

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 Knowledge of the binding mechanisms of heavy metals to cement minerals is essential for the prediction of the long-term leachability of cement-based solidified waste containing heavy metals. In this paper, the sorption of chromate ions onto calciumsilicate- hydrate (C-S-H) in equilibrated aqueous suspensions was investigated as a function of liquid-to-solid ratio. The hypothesis of super-equivalent adsorption was assumed to be involved in chromate ions immobilization. This hypothesis...
Autori: Constantin Bobirica, Ionel Constantinescu, Liliana Bobirica,
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25478

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 Highly dispersed nanoparticles of transition and noble metals are utilized for hydrocarbon reactions and rearrangements important to the chemical industry. The need to obtain 1 to 3 nm particles with narrow size distributions has prompted the development of alternative processing methods. Due to widespread speculation concerning the enhanced properties of nanoparticles over their bulk and atomic material equivalents, nanoparticle synthesis has become an active field of research withi...
Autori: , Irina Dumitriu,
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25482

Abstract This paper presents preliminary results of a batch-scale study assessing the contribution of the multiple phenomena involved in siloxane removal in three-phase biomatrices. Batch scale experiments were undertaken in shaken flasks containing acclimatised culture medium, solid media and siloxane vapours (octamethylcylotetrasiloxane and decamethylcyclopentasiloxane, respectively) under anaerobic gas-phase conditions. Abiotic and biotic phenomena, considered to be possible siloxane remov...
Autori: Gabriela Soreanu, Patricia Falletta, Michel Beland, Kara Edmonson, Peter Seto
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25510

Abstract Waste management hierarchy has as priorities waste recycling and energy recovery. Unfortunately, Romania is in the situation so as the waste landfilling is still considered as a suitable solution for waste management. European Union imposed a number of regulations and programs in the field of waste treatment and management that Romania must comply. The paper describes some aspects regarding characterization of the leachate originating from the Tomesti landfill (situated in Iasi County...
Autori: Ana-Maria Schiopu, Brindusa Mihaela Robu, Ion Apostol, Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25523

Abstract The use of appropriate leaching tests and leaching models can help to predict the hazardous components release from cementbased solidified waste during either utilization or disposal. Numerous parameters influence the leaching rates such as grain size/specimen size,ccc liquid-to-solid ratio, pH value of the leachate, leaching time etc. This study evaluates the effect of initial liquid-to-solid ratio of cement paste on the release of copper from cement-based solidified waste. Dynamic ...
Autori: Constantin Bobirica, Liliana Bobirica, , Ionel Constantinescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25527

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 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 Geopolymerization is a continuous developing field of research for utilizing solid waste and by-products. It provides a solution to many problems where hazardous residue has to be treated and stored under critical environmental conditions. Consumption of fly ash in the manufacture of geopolymer is an important strategy in making materials more environmentally friendly. Fly ash has been chosen as a base material in order to utilize this industrial waste. Previous researches have show...
Autori: Maria Harja, Marinela Bărbuţă, Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25542

Abstract Plasma is often called the fourth state of matter. It is distinct from other lower-energy states of matter, most commonly solid, liquid, and gas, although it is closely related to the gas phase in that it also has no definite form or volume. Plasma technique may use any gas or gas mixture, within equipment limitations. Each gas or mixture of gases produces distinctive plasma, making possible a very diverse range of chemical environments. Besides the recombination mechanisms developed...
Autori: Marian I. Totolin, Ghiocel E. Ioanid, Iordana Neamtu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25550

Abstract The aim of this work was to obtain ceria-based catalysts with improved oxidation properties by adding tin dioxide (5, 10 and 20 wt %) and using the co-precipitation method of preparation. The samples were characterized by BET, ESEM, and DRIFT spectroscopy. The activity of SnO2-CeO2 catalytic systems in CO oxidation was studied between room temperature to 673 K. It was found that the increase of SnO2 content obviously increases the low temperature CO conversion. However, at 673 K all ...
Autori: Tatiana Yuzhakova, , Monica Caldararu, Jozsef Kovacs, Anca Vasile, Georgeta Postole, Cristian Hornoiu, Endre Domokos
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25565

Abstract This work presentes a study of preparation and stability in aqueous medium of complexes obtained by the reaction between Fe(III) with 2-amino-6-methoxy-benzothiazol-sodium sulphonate ??†’1 naphtol-4-sodium sulphonate. In this purpose, the investigation methods applied were as follows: pH-metry, conductometry, and the UV-VIS spectrophotometry. The molar combination ratio of ligand to central metallic atom, and the stability constants for new obtained compounds were determined usin...
Autori: Doina Sibiescu, Gabriela Carja, Ioan Roşca, Laura Chirila, Mihaela Vizitiu, Romen Butnaru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25585

Abstract The slags are an important waste and by-products of metallurgical industry. The present paper summarizes results obtained from physical and chemical analyses on metallurgical slag provided from S.C. ?Mittal Steel Galati? S.A. The physical structure and gradation of granulated slag depend on the chemical composition of the slag, its temperature at the time of water quenching, and the method of production. The following mineralogical components were noticed through bypowder X-ray diffr...
Autori: Maria Cioroi, Licuta Nistor Cristea, Igor Creţescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25588

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 The aim of this study is the evaluation of photo-Fenton as a suitable advanced oxidation process to degrade ampicillin and streptomycin antibiotics. The degradation was studied by monitoring the organic substrate concentration changes in aqueous solution as a function of reaction time using COD analysis. The oxidation process follows two successive stages. In the first stage (I) the oxidation of the antibiotics takes place with high reaction rate, leading to intermediate oxidation pr...
Autori: Cristina Orbeci, Daniela Simina Stefan, Ion Untea, Madelene Dancila
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25602

Abstract Some samples consisting in silica functionalized in different degrees with dihydroxy-azomethine groups have been tested as sorbents for copper (II) ions from aqueous solutions in different conditions. An indirect monitoring procedure for the complexing process was approached: UV-VIS absorption intensity ? time variation for the metal-containing solution in which complexing silica was soaked. In order to find the conditions in which the maximum efficiency in the metal absorption can b...
Autori: Ciprian-George Piuleac, Maria Cazacu, Silvia Curteanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25608

Abstract Anaerobic digestion (AD) is a complex biological system which can be affected by several operational problems. Among them, biological foaming is one of the most difficult to deal with. It has many effects, such as causing gas pipe clogging and probe failures, and it can affect mixing devices, etc. Since the mechanisms involved in biological foaming development are not fully understood, it is not included in standard anaerobic digestion models. For this reason, a knowledge-based risk ...
Autori: Eric Latrille, Ignasi Rodriguez-Roda, Jean-Philippe Steyer, Joaquim Comas, Jordi Dalmau
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25610

Abstract The Schiff base N,N??(salicylidene)-methylenediamine, known as Salmen in combination with Cr(III) forms at pH = 4.5 a greenish precipitate, which is stable at room temperature but decomposed on heating. The study of the Infrared spectra, Electron Spin Resonance (ESR), X-ray diffraction and thermogravimetry has pointed out that the precipitation form is a complex, while the molar ratio showed that the combination rate of Cr(III): N,N?-bis(salicylidene)-methylenediamine is 1:1. The new...
Autori: Doina Sibiescu, Ioan Roşca, Irina Spatarescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25619

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

Abstract Equilibrium and kinetics of sorption of Zn (II) ions from aqueous solutions of pH 5 on indigene (Romanian) peat moss were investigated in batch system. The experimental equilibrium sorption data at three temperatures were analysed by Freundlich, Langmuir, Tempkin and Dubinin-Radushkevich sorption isotherm models. Results indicate the following order in to fit the isotherm equations: Langmuir > Tempkin > Dubinin-Radushkevich > Freundlich. The equilibrium sorption capacity determine...
Autori: Angelica Kicsi, Doina Bilba, Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25632

? 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

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

Acidithiobacillus ferrooxidans plays an important role in the pyrite oxidation process and has been widely studied in order to determine the kinetics of the reactions, but the details of the oxidation processes on the surface of pyrite keeps poorly known. In this study, the bio-oxidation process of pyrite by Acidithiobacillus ferrooxidans was studied by comparing with abiotic oxidation by Fe3+. The attachment of Acidithiobacillus ferrooxidans on pyrite surface was found by using Scanning Electro...
Autori: Lei Jiang, Huiqun Yang, Yuruo Tao, Jinyan Yanghttp://www.ecozone.ro/reviste.php?RID=25686

Abstract:Drying wood requires a significant amount of thermal energy, in order to heat-up wood and evaporate the water inside it.Therefore, solutions to minimize this consumption are a topic of maximum interest for wood-processing industries. Employingsolar power for drying wood is not a novelty, considering that this possibility was already acknowledged at the end of the 17thcentury, but since then, kiln design was significantly improved, once with the progress of knowledge regarding the mechan...
Autori: Ion Marinescu, Mihaela Câmpean
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25727

The permanent magnet EDS train has been considered to be one of the most promising urban transportation vehicles due to its particular characteristics: simple configurations, low energy consumption, low noise, and suitable for high speed conditions. In order to study the characteristics of permanent magnet Electrodynamic Suspension (EDS) system, an experimental mechanism was established in this paper. The optimization of Halbach magnet array has been carried out and appropriate track for the EDS...
Autori: Zhiqiang Long, Guang He, Ning He, Zhizhou Zhanghttp://www.ecozone.ro/reviste.php?RID=25713

Abstract:The paper aims to present the new pattern of modular agriculture, as evolution of agri-food production in the coming decades aswell as to highlight the direct relation between this pattern and the massive energy support it requires.The paper basically deals with reactions to climate change, reductions of carbon emission, in addition to high quality and safetyrequirements for food production. The author envisages the PAC measures called for in order to ensure a sustainable developmentof ...
Autori: Romulus Gruia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25746

Abstract:The paper presents the results obtained when using one ketonic Mannich base BM (1-(2’-hydroxyphenyl)-3-(1-piperidinylamino)propan-1-one hydrochloride) as corrosion inhibitor in saline environment, for different types of carbon steels,with various alloying elements. The Mannich base was synthesized and used in corrosion experiments, in concentrations varyingfrom 0….1300 ppm. The corrosion experiments were performed by potentiodynamic polarization studies, with 50 mVs-1 scanrate. The ...
Autori: Andreea Milea, Cristina Bogatu, Ileana Manciulea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25754

Abstract:Energy mix used in "Solar House" is currently composed of about 50% renewable energy sources (geothermal energy) and 50%conventional sources of energy (mainly electricity from national grid and less than 10% natural gas). The geothermal energy isextracted by the mean of a ground coupled heat pump which assures the heating load of the "Solar House" and the preparation ofdomestic hot water. The peak load in heating period is covered by a natural gas boiler and the electricity to drive the...
Autori: Bogdan Burduhos, Ion Vişa, Macedon Moldovan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25756

Abstract:The paper presents a method to improve the efficiency of a photovoltaic (PV) string by employing a mono-axis trackingmechanism. The tracking system was optimized so that it has minimum energy consumption during tracking. The PV stringsimultaneously changes the daily position using a linear actuator which transmits the motion to all modules by a rack-pinion gearmechanism. The system is designed in virtual prototyping concept with the following software solutions: for the solid modeling -...
Autori: Cătălin Alexandru, Nicoleta-Irina Tatu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25766

Abstract:The work presents the results in investigating the thermal behaviour of passive solar elements, for expanding the existing analysisand prediction methodologies. The interest focuses on solar control through natural shading with deciduous plants. This providesa natural path for incorporating all advantages the passive behaviour, available throughout the year. The simulation of thedynamic energy performance of building elements is developed, starting with a physical modelling of the vario...
Autori: Angelos D. Tzachanis
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25768

Abstract:Ash is a waste that can be an efficient substrate in wastewater treatment for the immobilization of heavy metals and for dyesremoval. For an up-scalable wastewater treatment process, efficient substrates, with relatively constant behavior are needed andmodifying the adsorbent surface can be a feasible solution. Fly ash, resulted from coal burning, and wood ash are mixtures mainlycontaining metal oxides and carbon in various proportion, depending on the initial raw material.The paper pre...
Autori: Maria Visa, Mihaela Nacu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25771

Abstract:The oxidation of low grade complex concentrates (Cu, Pb and Zn) in aqueous media (weak alkaline) oxidized nonferrous metalsconcentrates is carried out at high pressure. Leaching is the subsequent processing step in metal extraction. The paper studies theinfluence of some parameters (temperature, time, L:S ratio, excess) on the leaching efficiency of nonferrous metals from oxidizedconcentrate. The optimum parameters determined are: S/L ratio of 10/1, 25% reactive excess, leaching tempera...
Autori: Cornelia Lupu, Dragoş Taloi, Liliana Gherghe, Luminita Mara, Teodor Velea, Vasile Predica
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25774

Abstact:0.5 - 2.0% CuO-doped ZnO (CuO-ZnO) photocatalysts were prepared with a simple mixing method where the oxides wereinitially synthesized through precipitation. The physico-chemical properties of CuO-doped ZnO photocatalysts were studied viaXRD, TEM, XRF and BET method and their photoactivity was evaluated by degrading methyl orange (MO) dye. The propertiesof ZnO were not affected by the addition of CuO except for the particle size of the photocatalyst, which increased proportionallywith Cu...
Autori: Abdul Halim Abdullah, Md. Jelas Haron, Nor Zafirah Razali
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25785

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, the adsorption mechanism of a reactive azo dye, Reactive Yellow 125 (RY 125), onto a nitrogen doped TiO2 modified zeolite (Z-TiO2-N) has been examined in order to identify the affinity of the material for the investigated pollutant envisaging its degradation by heterogeneous photocatalysis. Equilibrium experiments were performed and the data obtained were fitted with different isotherm equations, i.e., Langmuir, Freundlich, and Dubinin-Radushkevich (D-R). The Freundlich i...
Autori: Cornelia Ratiu, Elida Cristina Ilinoiu, Florica Manea, Laura Cocheci, Liliana Andreea Colar, Rodica Pode
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25809

An iron(Fe+3) oxide/hydroxide nanoparticles-based agglomerates (AggFe) suspension adsorbent was synthesized for efficient, cost-effective phosphate removal. A strong effect of AggFe concentration and pH level of water containing phosphate on removal efficiency was shown. It was found that phosphate adsorption onto the AggFe suspension may be described by pseudo-secondorder reaction kinetics and the Langmuir isotherm model. The unique adsorption properties of synthesized AggFe adsorbent are demon...
Autori: Grigori Zelmanov, Raphael Semiat
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25829

This paper presents a study on the integration of two advanced treatment processes for the removal of priority organic processes from wastewaters: catalytic oxidation (Fenton homogenous process) followed by ultrafiltration. The aim of this study was to assess the removal efficiency for 4-chlorophenol (used as model pollutant), as well as the decrease in effluent toxicity in various processes conditions. The experiments have mainly focused on studying the effect of the oxidant dose of the catalyt...
Autori: , Cezar Catrinescu, Corina Petronela Musteret, Daniela Arsene, George Barjoveanu, Petru Apopei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25834

Human nature constantly tends to place personal interest first, to the detriment of general interest. In this respect, tax and duty payers have always attempted to evade payments on their tax liabilities, resorting to various tactics, as they view such compulsory payments as detrimental to their wealth and income. On the other hand, the state seeks to maximise its receipts from taxes, duties, excises etc. In Romania, after 1990, an entire range of anti-tax reactions occurred in the sphere of pub...
Autori: Carmen Sandu, , Marius Vorniceanu,
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25835

The aim of this work is the study of activated sludge floc samples stained with different dyes and imaged by Confocal Laser Scanning Microscopy (CLSM). Activated sludge flocs were stained for lipids, sugars and esterase enzyme producing bacteria. Images were acquired for different samples to analyze the structural characteristics of the bioaggregates. The analysis of the CLSM images allowed for the localization and estimation of the quantity of different build-up materials. The 3-D reconstructio...
Autori: Bela Abraham, Botond Raduly, Dan Niculae Robescu, Szabolcs Lanyi, Szabolcs Szilveszter, Szilard Bucs
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25937

The reactive extractions of propionic acid with TOA dissolved in three solvents with different dielectric constants (dichloromethane, butyl acetate, n-heptane) without and with 1-octanol as phase modifier have been comparatively analyzed. The results indicated that the mechanism of the interfacial reaction between acid and extractant is controlled by the organic phase polarity. In absence of 1-octanol, the structures of the extracted complexes are RCOOH.Q2 for dichloromethane and butyl acetate, ...
Autori: Alexandra Cârlescu, Anca-Irina Galaction, Dan Caşcaval, Mădălina Poştaru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25938

The removal of Cr (VI) from aqueous solutions by sphagnum peat moss was investigated in batch experiments as a function of solution pH and initial Cr (VI) concentration. The highest removal percentage (R=99%) was obtained at pH = 1, in solutions of 20.8 mg Cr (VI)/L. In order to establish the mechanism of the removal process, Cr (VI) and total Cr (Cr (VI) + Cr (III)) in residual solutions was analyzed. The Cr (VI) removal by the peat moss at low pH is governed by two processes – electrostatic ...
Autori: Catalin Balan, Doina Bilba, Irina Volf, Matei Macoveanu, Petru Bulai
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25849

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

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

This paper presents a new photo-Fenton procedure applied in oxidative degradation of organic pollutants using 4-chlorophenol (4-CP) as low biodegradable testing compound. The homogeneous photo-Fenton process was modified by using a photo-catalytic reactor equipped with a steel wire mesh which acts as source for Fe2+ catalyst generation into reaction medium and as heterogeneous catalyst, by iron oxy-hydroxyl compounds formation on the surface. The oxidation process was evaluated by measuring the ...
Autori: Adina-Elena Segneanu, Cristina Orbeci, Ion Untea, Mihaela Emanuela Craciun, Rodica Stanescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25864

The synthesis of vanadium oxide systems (with 5 and 20 wt% V2O5 loadings) supported on commercial γ-alumina was carried out by a wet impregnation method. The samples were characterized by low-temperature nitrogen adsorption (BET), inductively coupled plasma (ICP) method and by in situ electrical conductance/capacitance measurements. The adsorption of CO was used to investigate the acidic properties of alumina support and V2O5/-Al2O3 catalysts by FTIR spectroscopy. The catalytic acti...
Autori: , Cristian Hornoiu, Mariana Scurtu, Monica Caldararu, Niculae I. Ionescu, Tatiana Yuzhakova, Veronica Bratan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25869

Nowadays, advanced wastewater treatment has become a stringent step for the removal of priority organic pollutants and many technologies have been proposed in order to achieve effluents with a superior quality for recycling or reuse purposes. This research is focused on the possibilities of using an integrated process, comprising 2 stages: the advanced oxidation process of ultrasonication and a membrane separation process, ultrafiltration. The main objective of the study is to assess the efficie...
Autori: , Daniela Cailean
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25880

The nitrogen and phosphorus management in agricultural systems leads to an increased input of plant nutrients and sustains the soil fertility. Microbes contribute through different mechanisms to nutrient cycles, transforming it available for plants. Isolation of 18 Azospirillum and 18 Azotobacter bacterial isolates was effectuated from the rizosphere and interior roots of the following plants: Carex fusca All., Carex rostrata Stokes., Eriogonum latifolium Sm., Carex elata All., and from Equisetu...
Autori: Csaba Dezso Andras, Eva Gyorgy, Eva Laslo, Gyongyver Mara, Rozalia Veronika Salamon, Sarolta Szentes, Szabolcs Lanyi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25894

Abstract An activated sludge from SBBR (sequencing biofilm batch reactor) reactor filled with Fe0  as filler had been acclimated to Fe(III)rich environment aiming at secure an enrichment culture of iron-reducing bacteria. The dissimilatory Fe(III) reduction ability and its efficiency on the effect of nitrogen and phosphorous removal by dosing different Fe(III) under anaerobic condition were investigated. The mechanism was also proposed based on the results derived from the experiment a...
Autori: Jie Li, Juanjuan Feng, Siyuan Zhai, Ya’e Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25943

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 huge emission of greenhouse gases from fossil-fuelled power plants is emphasizing the need for efficient Carbon Captureand Storage (CCS) technologies. The biomimetic CO2 absorption in aqueous solutions has been recently investigated as apromising innovative alternative for post-combustion CCS. The carbonic anhydrase (CA) - a broad group of ubiquitous enzymes– may catalyse the CO2 hydration reaction and then to promote CO2 absorption rate into aqueous solutions. Nevertheless theresear...
Autori: Antonio Marzocchella, Giuseppe Olivieri, Maria Elena Russo, Piero Salatino
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25976

AbstractIn this paper integrated network of continuous reactors for the decontamination of gaseous flows in heterogeneouscatalytic gas-liquid-solid – also applicable for bioremediation systems is investigated. For this purpose, duringprocess integration we have identified strategies to develop an optimal system for a variety of well-definedrequirements and to discover ways to ensure cost efficiency to achieve the requirements of sustainable industry in theframe of knowledge-based sustainable eco...
Autori: Maria Gavrilescu, Oana Marlena Penciu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25977

AbstractThe paper describes the synthesis of nanocrystalline zinc ferrite starting from 1,4-butanediol and a mixture of zinc and ironnitrates. During the heating of the obtained solution, a redox reaction takes place with emission of brown nitrogen oxides andformation of a solid powder. This powder was characterized by thermal analysis and FT-IR spectrometry, techniques thatconfirmed the formation of a mixture of zinc and iron carboxylates. This mixture was further used as precursor for zinc fer...
Autori: Cornelia Muntean, Marcela Stoia, Paul Barvinschi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26029

AbstractIn this work, cyclic voltammetry (CV) and differential-pulsed voltammetry (DPV) were used to detect pentachlorophenol (PCP)at two types of multi-walled carbon nanotubes (CNT)-based composite electrode, i.e., TiO2-modified-CNT-Epoxy (TiO2-CNTEpoxy)and CNT-Epoxy in 0.1 M sodium sulphate solution supporting electrolyte. The electrochemical behaviour of theelectrodes was investigated in the absence and presence of UV irradiation. A single oxidation peak at a potential value of about+1 V vers...
Autori: , Ágnes Jakab, Aniela Pop, Cornelia Bandas, Florica Manea, Joop Schoonman, Rodica Pode
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26033

AbstractA simplified numerical model of the water distribution network of a medium sized town (with 30,000 inhabitants), of elongatedshape, was implemented in EPANET. The decay of chlorine residual concentration in the above mentioned network was studied,using the extended time analysis capabilities of EPANET, for a 3 days period. The water supply system, composed of one tank, 86pipes and 52 nodes is driven by gravity. The chlorine is injected at the tank with a constant concentration amount. Th...
Autori: Andrei-Mugur Georgescu, Sanda-Carmen Georgescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26054

AbstractThe removal of residual oil from palm oil mill effluent (POME) using boiler fly ash was studied in this paper, with focus on theadsorption isotherms and kinetic studies by measuring the residual oil concentration using UV-spectrophotometer. The percentresidual oil adsorbed decreased from 80% to 5% as contact time was increased from 10 mins to 120 mins but increased from2.74% to 72.98% as initial concentration of residual oil increased from 0.04812 mg/L to 0.2406 mg/L. Pseudo-second order...
Autori: Jude C. Igwe, Stella N. Anioke, Uche Arukwe
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26078

AbstractThe performance of four low cost Iraqi clays, bentonite (BT), kaolinite (KT), attapalgite (AT) and flint (FT) to remove lead ionsfrom aqueous solutions by adsorption was investigated. Batch experiments were carried out at pre determined equilibration time,adsorbent dosage, solution pH, particle sizes, ionic strength, initial lead ions concentration and temperature. Adsorption of Pb2+ions was strongly affected by pH and best adsorption is achieved at pH 4.5. The systems were investigated ...
Autori: Najwa I. Abdulla
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26086

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

Abstract Recently, a new failure probability index was introduced that characterizes the operation of highly sensitive chemical reactors (i.e. when highly exothermic / hazardous reactions are conducted). Based on this, the current paper exemplifies the application of the risk analysis methodology proposed to generate the Pareto optimal operating solutions accounting for reactor productivity maximization (product yield) and probabilistic risk minimization. The multi-objective optimi...
Autori: Anca Dan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26108

Abstract The Black Sea is seriously affected by a large range of pollutants, despite severe laws regarding the protection of sea ecosystems. Heavy metals are among the most important xenobiotics from the environment, presenting also toxicity for humans. The studies upon heavy metals have proven that the sediments have the highest concentrations and they can release metals back to water and this fact represents a risk for the humans and aquatic ecosystem life. The use of aquatic ...
Autori: Oana Jitar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26112

Abstract This paper presents a research method for the exploratory analysis of non-compliant municipal waste landfills by determining the gas composition of emissions. The proposed method has the following stages: establishing municipal landfill surface contour by topographic measurements; setting measuring points on the deposit surface; setting the number of points needed and their spatial coordinate; field location of points for making exploratory measurements; making and recordi...
Autori: Michaela Bianca Vac Soporan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26127

Abstract In a world of uncertainty, the only constant is change and rapid change produces a multitude of diverse facts. Risk is an integral part of life. While no country in the world is entirely safe, the lack of capacity to limit the impact of hazards remains a major burden for all countries and while the world has witnessed an exponential increase in human and material losses due to natural disasters, there is a need to reverse trends in vulnerability to earthquakes. Available d...
Autori: Gheorghe Mărmureanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26140

AbstractBehaviors of adsorption of di-n-butyl phthalate (DBP) on humic acid and the effects of temperature on these processes are studied by solid phase extraction-HPLC method. The results show that the adsorption amounts of DBP increase with increasingequilibrium-concentrations of DBP. Such results could be well described by Langmuir equation. The maximum adsorptionamount (Qmax) and adsorption constant (k) at 35oC were both lower than those at 25oC. Thus, high temperature is unfavorable to the ...
Autori: Zhi-dang Yang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26162

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

AbstractA wet flue gas desulfurization (WFGD) system adopting electrostatically-assited twin-fluid atomization injector was presented.Spatial distributions of the droplet sizes, velocity for different voltages were measured using limewater and SO2 removalefficiency for different voltages and Ca/S ratios were tested using limewater drops. The physical and chemical improvementmechanisms were analyzed using spray characteristics and double film theory. The analysis showed that electrostatically-ass...
Autori: Zhentao Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26175

AbstractThermal behaviour, microstructure and mechanical properties of the clay polluted by acidic and alkaline pollutants wereinvestigated by thermogravimetric/differential thermal analysis (TG-DTA), scanning electronic microscope (SEM), mercuryintrusion experiments, permeability coefficient and unconfined compressive strength tests. The clay polluted by alkaline solutionpresented distinct exothermic peaks at 304-310oC, while it’s not observed for the one polluted by acidic solution due to thed...
Autori: Zhao Ying
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26182

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

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

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

AbstractIn an urban environment, visibility strongly reflects human safety and welfare. Generally, visibility is dependent on particlescattering and absorption. The former is influenced by light wavelength, atmospheric gaseous species and particle characteristics,especially number and size distribution. Therefore, it is necessary to establish the relationship between visibility and particlecharacteristics. Furthermore, it is important to understand the formation mechanism of secondary aerosols. ...
Autori: Chih-Ming Ma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26221

AbstractIn this research, response surface methodology (RSM) was applied to model the effect of main operational variables includinginitial pH, initial phosphate concentration, current density and reaction time on phosphate removal by electrocoagulation. It wasfound that the decrease of initial pH and initial phosphate concentration, and the increase of current density and reaction time are beneficial for improving phosphate removal efficiency. According to the ANOVA (analysis of variance) resul...
Autori: Mohsen Behbahani
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26237

AbstractThe intercalation of 2,6-dichlorobenzonitrile (DBN) into the NiMgAlLDH, CuMgAlLDH and MgAlLDH layered doublehydroxides was carried out using the calcination-rehydration reaction using NiMgAl, CuMgAl and MgAl oxide precursors,obtained by calcination at 550oC. X-ray diffraction (XRD), elemental analysis, infrared spectroscopy (FTIR) andthermogravimetric analysis (TG-DTG) confirmed that DBN molecules were successfully intercalated into the interlayer spaces ofLDHs. The resulting solid produ...
Autori: Mihaela Silion
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26244

AbstractEnergy efficiency in buildings is a key issue in achieving sustainable development. Many decision support methodologies andtools have been developed, mainly based on energy consumption measurements or simulations and rules designed by experts toconstruct Building Energy Management Systems. An extension of this information from raw consumptions to energy efficiency isrequired. In addition, a visual depiction of this information with temporal and spatial resolution, applied to the differen...
Autori: Mark Richard Wilby
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26259

AbstractThe inactivation of Escherichia coli was investigated with two types of underwater electrical discharge systems such as pulsedelectrical discharge (PED) and dielectric barrier discharge (DBD). The DBD system consisted of a quartz tube and a coaxialdischarging electrode, which was submerged in biologically contaminated water. In the underwater PED system, the electricaldischarge starting from the tip of submerged tubular discharging electrode propagated downward and the direction of worki...
Autori: Sang Don Kim
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26263

AbstractThe aim of the present study was to investigate the mechanism of Cr(VI) bioaccumulation by livingand active Phanerochaete chrysosporium. Fungal growth was inhibited beyond 10 mg L-1 Cr(VI) concentration thereby reducing the chromium bioaccumulation capacity. The optimum pH was found to be 6 for the growth and bioaccumulation of Cr(VI) by P. chrysosporium. Bioaccumulation efficiency decreased from 81.47% to 23.82% when Cr(VI) concentration was increased from 10 to 40 mg L-1. A Fourier tra...
Autori: Kaustubha Mohanty, Somasundaram Murugavelh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26280

AbstractIn the present paper, support vector machines (SVMs) are used to develop a quantitative structure-activity relationships (QSAR) model for the reaction rate constants (-logkNO3) of 115 heterogeneous organic compounds, through reaction with nitrate radicals (NO3•) in the troposphere. Two quantum chemical descriptors used as the inputs for the SVM model were calculated with density functional theory (DFT), at the B3LYP level of theory with 6-31G(d) basis set. The best predictions were obtai...
Autori: Bing Yi, Jiyong Deng, Xinliang Yu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26284

AbstractChina’s natural wetlands occupy 3.77% of the land and provide 54.9% of China’s ecosystem services. Healthy natural wetland ecosystems play an important role in the sustainable development of China, which was realized by the Chinese government in the early 1970s. In the past 5 years, China has made great efforts in wetlands conservation, which is signified by the funding of billions of dollars to restore degraded wetlands, the policy to return reclaimed croplands to wetlands, the specific...
Autori: Hongli Song, Huanhuan Jiang, Linus Zhang, Wanlong Sun, Wenguang Sun, Xiaojie Mou, Zhigao Sun
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26291

AbstractOne of the key issues in building construction is environmental sustainability. Conventional methods of construction do not consider the in-built capacity to adapt over time according to new technical requirements and environmental consequences. Therefore, any change or renovation of the building will result in significant cost and lost use during its lifecycle. Designing flexible buildings for easy change and adaptation will assist the main concept of sustainability by reducing material...
Autori: M. Fauzi M. Zain, Maslina Jamil, Nasibeh Sadafi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26293

AbstractIn the present study, batch adsorption experiments were performed for the removal of methylene blue (MB) dye from its aqueoussolution using newly prepared surface modified cashew nut shell (SMCNS) by varying the operating parameters like solution pH,adsorbent dose, initial dye concentration, contact time and temperature. The SMCNS has been prepared by treating the cashewnut shell with the sulphuric acid. Adsorption equilibrium data were analyzed by the model equations such as Langmuir,Fr...
Autori: Krishnan Gayathri Lashmi, Muthukumar Priyadharshini, Ponnusamy Senthil Kumar, Ramasundaram Vijayakumar Abhinaya, Subramanian Sivanesan, Vishwanathan Arthi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26309

AbstractMonitoring an unstable slope is quite important for environmental safety. Based on our previous studies, this paper presents athird-generation distributed optical fibre transducer. The operating mechanism of this novel transducer was analysed for itsresponse to a single concentrated and uniform load, and a theoretical study was conducted on the elongation of the bottomsurfacefibres of a bending resistance model at the phases of linear elasticity and total cross-section cut-off stage. A b...
Autori: Bang Liu, Dong-Yan Liu, Hu Luo, Jing-Cheng Liu, Qiao-Ying Yuan, Yun-Ju Luo, Zheng-Wei Zhu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26348

AbstractEnvironmental regulation and its impact on corporate performance have attracted both the Government’s and the academia’sgrowing focus. The “Porter Hypothesis” theory shows that environmental regulation would exert direct impact on corporateperformance, while technology progress would compensate for it indirectly. In this paper, we completely and specificallyexamines those two effects by setting the three models and creating the interaction variable in the third one. The panel data from20...
Autori: Chengming Huang, Hong Li, Wei Liu, Xianqi Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26358

AbstractFeed-In-Tariff (FIT) mechanism is an important measure for government to incentive photovoltaic (PV) industry development. Inorder to secure the appropriate implementation of the Feed-In-Tariff (FIT) mechanism, this paper explores in the first place anoptimal bidding contract price by establishing a bidding model between government and photovoltaic power generationcompanies. On this basis, the paper adopts the Net Present Value (NPV) method and studies the impacts of the fluctuations ofd...
Autori: Hong Li, Juanrui Lou, Tingting Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26378

AbstractIn this paper, the panel data model is built to research the dynamic evolution mechanism of the total factor energy efficiency(TFEE). Then by using the panel data of China from 1991 to 2009, this paper estimates China’s TFEE based on the input to theguide DEA model, and empirically researches on the dynamic evolution mechanism of the China’s TFEE by comparativelyanalyzing the contribution rate of every influencing factor to the growth rate of TFEE. The empirical research results show tha...
Autori: Chuan-Xu Wang, Jian-Min Wang, Li Yang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26380

AbstractCatalytic wet oxidation (CWO) of phenol was studied in the present work. The effect of liquid hourly space velocity (LHSV),superficial gas velocity, reactor pressure, temperature and initial phenol concentration on phenols removal was investigated.Results showed that phenol conversion increased with increasing reaction temperature, reactor pressure, and superficial gasvelocity of oxygen, yet it decreased with increasing (LHSV). The results exhibited that the highest phenol conversion of(...
Autori: Farah T. Jasim, Luma S. Ahmed, Mohammad F. Abid
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26381

AbstractThe study on the kinetics of reactive extraction of rosmarinic acid with two extractants, Amberlite LA-2 and D2EHPA,underlined the strong influence of extractant type, solvent polarity, and 1-octanol content on the relative magnitude of thediffusional or kinetic resistances and on the interfacial reaction rate. Thus, indifferent of the extractant type, the highest values ofinterfacial mass flows and reaction rates have been reached for extraction in dichloromethane. The addition of 1-oct...
Autori: Mădălina Poştaru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26412

AbstractThe main purpose of the present work was to evaluate the potential of plum (P. domestica L.) tree bark (PDB) to remove Cr(VI)and total chromium from aqueous solutions in batch systems. Experimental data showed that the Cr(VI) and total chromiumremoval capacity was dependent on operating variables such as PDB particle size, PDB pretreatment, solution pH, initial Cr(VI)concentration, and contact time. The mechanism of Cr(VI) removal by PDB implies two simultaneous processes: 1) the reducti...
Autori: Perla Vianey Lopez-Nuńez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26464

AbstractThe electrochemical properties of two fluorinated substrates, namely 1H-3-methyl-4-ethoxycarbonyl-5-(4-fluorobenzylidenehydrazino)-pyrazole (Ia) and 1H-3-methyl-4-ethoxycarbonyl-5-(2-fluoro-benzylidenehydrazino)-pyrazole (Ib)respectively have been investigated in the room temperature ionic liquid (RTIL) 1-butyl-3-methylimidazolium tetrafluoroborateon a platinum electrode. The voltammetric investigation of the above compounds in the mentioned RTIL shows mainly twoirreversible anodic peaks...
Autori: Liviu-Virgil Costea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26471

AbstractPathogenic bacteria are fetal to human health, requiring cost-effective and safe approaches to be removed from drinking watersource. With poly-allylamine-hydrochloride (PAAH) stabilization, magnetic nanoparticles (MNPs) were introduced in this studyto remove pathogenic bacteria by electrostatic interaction and magnet capture. High removal efficiency was achieved for fourmain pathogenic species, as Escherichia, Acinetobacter, Pseudomonas and Bacillus, and over 99.5% of the pathogens can b...
Autori: Yunfeng Xu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26475

AbstractBisphenol-A (BPA; 2,2-bis(4-hydroxyphenyl)propane) is a monomer used primarily in the production of polycarbonate andepoxy resins that has been reported to have estrogenic activity. The biodegradability of BPA has been previously investigated inseveral studies designed to simulate surface waters and biological wastewater treatment systems. However, there is littleinformation available about the phytoremediation of groundwater contaminated with BPA. Halophytic species are of specialintere...
Autori: Margarita A. Petoussi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26493

AbstractThe paper concentrates on the risks of modern technologies (in wood processing and metal industry, spray-painting processes andcar washing technologies) in the industrial and office environments on human health. The problems discussed are the following:fine dust (PM2.5and PM1.0) penetrating deeply into the lungs; high concentration of carbon dioxide in the air of cities and officeareas that are situated close to the transport junctions. The health damages can be described as follows: all...
Autori: Ada Traumann
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26501

AbstractTetracycline (TC) are used as bacteriostatic agents, inhibits the synthesis of bacterial proteins, with activity against awide variety of organisms with application in human and veterinary medicine. The presence of TC in theenvironment constitutes a serious problem, being weakly metabolized or absorbed into the human or animal bodycon. TC residues even in low concentration may produce serious toxic and other effects on humans and livingorganism. In this study are presented the applicatio...
Autori: Carmen Ionela Brînzilă
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26513

AbstractThe alkylation of light hydrocarbons leads to produce the high octane number gasoline blending components. The homogeneouscatalytic alkylation reaction is usually carried out at low temperature in the presence of H2SO4 and HF. The use of heterogeneouscatalysis for this reaction is a promising solution for the replacement of hazardous acids to environmentally friendly zeolitecatalyst. The alkylation reaction of isobutane with 1-butene was studied on selected zeolite catalysts. The objecti...
Autori: Tatjána Juzsakova
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26514

AbstractThe adsorption potential of 10 wt.% COOH/TUD-1 material for removing Cd2+ from aqueous solutions was investigated via thebatch technique, and the effects of pH, temperature and contact time were studied. Experimental data showed that the maximumCd2+ adsorption, 90%, occurred at pH 6. The adsorption equilibrium was reached within 35 min for 10 wt.% COOH/TUD-1. Theadsorption mechanism was investigated in terms of its thermodynamics and kinetics. The adsorption data were fitted using theLan...
Autori: Nabila Bensacia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26558

AbstractGraphene oxide (GO) was prepared from expandable graphite by a modified Hummers’ method and characterized by TEM,XRD, FTIR, and Raman spectroscopy. The batch adsorption experiments were carried out to study the effect of variousparameters, such as the initial concentration, adsorbent dosage, initial pH, contact time and temperature on adsorption propertiesof cationic red X-GRL onto GO. The Langmuir and Freundlich models were used to fit the experimental data of adsorptionisotherms. The k...
Autori: Jiankun Sun
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26570

AbstractEnd-of-life tires are waste materials that pollute landscapes when they are disposed of in tire dumps. However, its life cycle is notfinished when they are scrapped. The rubber of end-of-life tires could be used for new purposes as construction material in roadrehabilitation. A gap-graded mix characterization was carried out in this work by means of laboratory and field performancetests. The mixture has a high content of crumb rubber (CR) by weight of bitumen. Crumb Rubber was added to t...
Autori: Victor F. Vázquez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26577

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

Abstract Cadmium leaching experiments from hazardous waste containing 16.5 wt% CdO were conducted using H2SO4. Dominant experimental and process parameters were determined by factorial design. Six controlling factors were considered, i.e. solidliquid ratio, acid concentration, reaction time, particle size, stirring speed and temperature. Analysis of variance (ANOVA) was used to identify main effects and their interactions. An empirical model, based upon experimental results, was developed to...
Autori: Mahdi Gharabaghi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26590

Abstract The objective of this study is to develop a mathematical model which would confidently predict the rate of substrate degradation of an oil-water emulsion in a laboratory-scale completely-mixed continuous flow reactor using the photo-Fenton treatment process. Two models are developed from first principles and the predicted substrate removal rates for both models are compared with experimental data. The principal conclusions of the study are that both models produce good correlations ...
Autori: Maha A. Tony
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26613

Abstract This study is focused on the dissolution kinetics of zinc oxide in ammonium acetate solutions to recover the zinc from alkaline and zinc-carbon spent battery powders. This study represents a first step for further studies in which actual waste powder is to be used. Therefore, the experiments were performed by using pure zinc oxide powder to evaluate the dissolution behavior of zinc. The effects of ammonium acetate concentration, reaction temperature, stirring speed and solid to liqu...
Autori: Nizamettin Demirkıran
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26618

Abstract This study examined the characteristics of geopolymer with solar panel waste glass. After 28 days of curing, the compressive strengths of the geopolymer samples containing 10 mass % and 20 mass % solar panel waste glass were 63.3± 1.8 and 49.1 ± 2.2 MPa, respectively. The geopolymer sample with 10% solar panel waste glass exhibited a stronger reaction than that with 20% solar panel waste glass, and the strength decreased as the amount of solar panel waste glass increas...
Autori: HuiCong Hao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26621

Abstract The feasibility of catholyte-conditioning to enhance the electrokinetic (EK) remediation of cobalt and lead polluted soil has been investigated in this study. Electrokinetic experiments were conducted using an EK cell 10 cm in width, 10 cm in height, and 50 cm in length. Plate type electrode of graphite was used as electrode material. Two experiments were conducted under constant voltage condition (2 V/cm). The pH values of the soil significantly affect the removal of Co and Pb ions...
Autori: Mahdi Bahemmat
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26623

In the Huai River Basin, pollutant masses are frequently concentrated into dams and sluices, which are subsequently discharged anddestroying the downstream ecology and environment. This phenomenon has been termed the specified paroxysmal water pollution incident (SPWPI), which has attracted worldwide attention as a large-scale water pollution problem. Studies of the formation mechanism of SPWPIs have become an urgent topic for fundamental research in water pollution prevention and control. I...
Autori: Şukru Dursun
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26628

Abstract 18F-FDG is a glucose analog in which the hydroxyl group on the second carbon is substituted with 18F, being used as an indicator of glucose uptake and cell viability. The aim of this work was to synthesize the 18F-FDG and to validate the methodology for the assessment of its both radiochemical and chemical purities, according to the European Pharmacopoeia. The proposed methodology encompasses three chromatographic methods: radio-HPLC, radio-TLC and HS/GC. Radiochemical impurities ...
Autori: Mirela Mihon
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26640

Abstract The purpose of this study was to investigate the influence of hydroxypropyl-β-cyclodextrin on diosmin, substance from the flavones category with important pharmacological properties. We carried out solubility studies, calculating the solubility constant of the complex formed between diosmin and hydroxypropyl-cyclodextrin at various temperatures (20, 25 and 37 0C) and in the presence of increasing cyclodextrin concentrations. AL type curves were obtained which suggest the format...
Autori: Constantin Ciobanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26643

Abstract The utilization of manure for waste-to-bioenergy conversion processes may be a sustainable development choice rather than its traditional use as a fertilizer. Furthermore, the valorization of manure via thermochemical conversion routes and their integration with biological processes can provide an additional pathway in the utilization of residual biomass. On the other hand, the use of metal oxides might enhance the performance of thermochemical processes such as pyrolysis by either ...
Autori: Maria Fernandez-Lopez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26647

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 This paper presents the results obtained using the prehydrolysis treatments of rapeseed stalks depending on regime and the catalyst. The vegetal materials were subjected under different temperature conditions and then characterized for the yield reducing substances. The differences between samples have been established by using FTIR and depend on the successive hydrolytic treatments of dynamic and static regime in the presence of various catalysts. The experimental data show that th...
Autori: Corina Măluţan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26654

Abstract The development of biodiesel industry in the recent past brought into discussion the valorization of glycerol as the byproduct of this technology. Dehydration of glycerol leads to acrolein, mainly used as a raw material in the production of acrylic acid and its esters. Several research efforts dealing with the synthesis of acrolein from glycerol are reported in the literature. However, they are limited to catalyst testing on laboratory scale, no attention being paid to the process f...
Autori: Ionut Banu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26666

Abstract A novel sensitive and rapid analytical approach based on ultra-high performance liquid chromatography - mass spectrometry (UHPLC/MS/MS) tandem was developed for the monitoring of pentachlorophenol in water samples. Chromatographic separation was carried out on Acquity BEH C18 (100 x 2.1 mm, 1.7 μm) column under gradient mode using a mobile phase consisting of acetonitrile/ultrapure water/formic acid. Quantification of pentachlorophenol was performed on a triple-quadrupole tandem ...
Autori: Yassine Kadmi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26673

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 performance of electrocoagulation (EC) process, a non-specific electrochemical technology, was investigated for the removal of carbamazepine (CBZ), an antiepileptic drug, from water. Experiments were carried out in synthetic wastewater in a batch cell. The respective influences of some key process parameters were studied, such as mixing conditions, initial pH, and current on aluminium electrodes. Experimental results showed that a CBZ removal efficiency of 62% was observed under...
Autori: Tania Yehya
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26683

Abstract The bismuth oxide (Bi2O3) nanoparticles are easily synthesized from a solution of bismuth nitrate pentahydrate (Bi(NO3)3·5H2O) in ethylene glycol by a hydrolysis solvothermal route at temperatures of 120-150C. X-ray diffraction, scanning electron microscopy and UV-visible diffuse reflectance spectroscopy are used to characterize the products. The results show that the reaction temperature, the reaction duration and the initial solution concentration play important rol...
Autori: Xiaowen Luan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26689

Abstract The degradation and adsorption behavior of dibutyl phthalate (DBP) in methanogenic phase refuse was investigated through laboratory microcosm experiments. The results showed that the half-life of DBP in the sterilized refuse was 5.9 times higher than in unsterilized samples, but that it decreased by 35.8% when dominant bacterial strains were added. Different concentrations of DBP did not have obvious effects on its degradation. The half-lives of DBP were decreased by 53.0%, 37.2% an...
Autori: Chengran Fang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26690

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 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 In this study, the efficiency of Fenton’s process to remove nickel (II) from industrial plating effluent was investigated. The effect of pH, contact time, concentrations of Fe2+ and H2O2 were surveyed. Kinetic experiments were performed in order to predict the nickel (II) removal rate from wastewater. At pH 1 to 4, nickel (II) removal efficiency increased and declined at pH > 4. The maximum nickel (II) removal efficiency was 98% at 60 min contact time, pH: 4, and Fe2+ and H...
Autori: Mohammad Malakootian
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26704

Abstract Autism spectrum disorders (ASD) are a heterogeneous group of neurodevelopmental disorders that affect an individual’s ability to communicate and socialize, often associated with repetitive movements or behaviors. Frequently patients associate intellectual disability or digestive problems. Autism is more common in males and affects 1 in 88 children in USA. The mechanism that leads to ASD is very complex, involving genetic, epigenetic, immune and environmental factors that could...
Autori: Cristina Rusu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26712

Abstract Locally sourced clay from Kuala-Kangsar town in Perak state Malaysia was used in both its raw (RKKC) and modified (MKKC) form as adsorbents for the removal of methylene blue (MB) from synthetic textile wastewater in batch adsorption process. The raw clay was modified through H2SO4 acid treatment, Al(OH)3 ion exchange, calcinations and then molded into beads before freeze drying. The BET surface areas of RKKC and MKKC were 11 and 100 m2/g, respectively; their elemental analysis and ...
Autori: Manase Auta
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26717

Abstract The objective of this study was to identify differences between three of the most conventional UV-based advanced oxidation processes, namely photolysis, UV/TiO2, and UV/ZnO for the decolorization and mineralization of reactive red 198 (RR198) model dye in saline media. The study investigated influences of solution pH levels, salt concentration, reaction time and dye concentration on the degradation of RR198. The most effective dye removal and mineralization was observed at pH levels...
Autori: Gholamreza Moussavi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26724

Abstract The juglone (5-hydroxy-1,4-naphthalenedione) can be found in the leaves and fruits of the black walnut (Juglans nigra L.). This substance has an inhibitory effect on the growth of the vegetal species, phenomenon which is named allelopathy. The inhibitory effect of the 50-100% concentration of this water extract, prepared from the black walnut fruits, on the seeds germination, plantlets growth and peroxidasic activity – registered in the seedlings roots – was poor, compar...
Autori: Dorina Cachiţă-Cosma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26730

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 MFe2O4 nanopowders (M = Ni, Co, Cu) were prepared using the precursor technique, starting from the corresponding metal nitrates and poly(vinyl alcohol)-PVA. During the heating of metal nitrates- PVA solution, a redox reaction takes place around 150°C, leading to the formation of M(II) and Fe(III) carboxylates. These compounds were used as precursors for the ferrites nanopowders. The desired ferrites were obtained by thermal decomposition of the carboxylates; the obtained...
Autori: Marcela Stoia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26745

Abstract The present work systematically investigates the photocatalytic degradation of carbamazepine (CBZ), an organic compound, known as refractory to the conventional wastewater treatment by the titanium dioxide PC 500 catalyst. The effects of some fundamental operating parameters in heterogeneous photocatalysis were investigated in this work in order to determine the main ones affecting the degradation kinetics. The obtained results clearly showed that the removal rate of the target comp...
Autori: Lidia Favier
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26754

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 Recently, the low carbon economy concept has attracted the interest of governments and enterprises. To achieve low-carbon economy, enterprises must invest in upgrading existing facilities, processes and products so as to reduce carbon emissions. Generally, the benefits of carbon emissions reduction of firms in a supply chain are significant, so the firms should share the investments. Based on this idea, we studied how to coordinate the supply chain to reduce carbon emissions. Specif...
Autori: Jing Gao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26807

Abstract Drinking of arsenic contaminated waters has been reported adversely affect our health even at a concentration level as low as 10 g/L, therefore the availability of a reliable and cheap, and an environmentally arsenic detection kit is really indispensable. Although simple field test kits have been developed, most of them use toxic mercuric salt as a color-generating reagent for arsenic detection. Hence this study was conducted to develop a simple, cost effective, and environm...
Autori: Keat Khim Ong
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26819

Abstract The problem of monitoring and controlling the complex and heterogeneous water distribution networks in urban environments is not new. Existing solutions include high-resilience and availability of telemetry systems where a wired or less often wireless backbone is connecting heterogeneous field devices to a centralized control centre. In the control centre, the administrative personnel of the utility are offered an overview of the system status, presented with possible alarms and may...
Autori: Athanasia Tsertou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26825

Abstract The recycling of plastic waste is important both in the conservation of resources and the environmental protection. A plastic waste (PE/PP/PS/PVC) was pyrolyzed over a series of post-use FCC catalysts using a fluidizing reaction system similar to the FCC process operating isothermally at ambient pressure. Experiments carried out with these catalysts gave good yields of valuable hydrocarbons with differing selectivity in the final products dependent on reaction conditions. A model ba...
Autori: Ta-Tung Wei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26836

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 Environmental research has been significantly enriched by genomic and proteomic methodologies. Particularly in the atmospheric pollution studies, where a variety of environmental hazards act simultaneously and frequently in close interrelationship, only such integrative methods can provide a comprehensive analysis. Nanoparticles are a heterogeneous class of particles, but their health effects have also common aspects. The scope of the article is to present the contribution of genomi...
Autori: Marina Otelea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26852

Abstract Popular since ancient times, the mineral waters from Carpathian Chain (Romania) have gained a well-deserved reputation due to their quality and health benefits. This study provides a description of the chemical and isotopic composition (δ2H, δ18O) of mineral waters (CO2 - rich and CO2 - free water) located in six of the most popular areas, in order to improve the overall knowledge about their genesis and recharge mechanisms. The hydro-chemical facies of groundwater vary ...
Autori: Roxana Elena Ionete
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26869

Abstract In this paper we present results from the first European (EUR) and North Atlantic (NAT) volcanic ash exercise (VOLCEX) which includes all the warning phases associated as alerting, reactive and proactive phases. Because volcanic ash represents one of the most serious natural hazards that could affect aviation safety, the measurement campaign was focused on improving the reaction of relevant authorities in case of airspace contamination with volcanic ash and, particularly, to assess ...
Autori: Livio Belegante
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26874

Abstract In the present study, several selected formulations based on recycled (rPP) or virgin polyolefins (vPP) and lignocelluloses were prepared and subjected to microorganism attack. Biodegradation tests were performed with microbial strains belonging to fungal genera, like Aspergillus, Penicillium and Fusarium. The initiation of biodegradation was demonstrated by Scanning Electron Microscope (SEM) micrographs showing the colonization of surface samples by microbial strains. The crystalli...
Autori: Luiza Jecu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26879

Abstract Safe operation of highly thermally sensitive industrial reactors is still considered a major issue in chemical engineering practice. The problem becomes even more stringent when highly exothermic reactions are conducted under randomly fluctuating operating variables, and especially when the set-point is located in a close vicinity of the runaway boundaries for increasing the reactor productivity. This study is aiming to derive the runaway boundaries and their associated region of co...
Autori: Constantin Muscalu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26884

Abstract The goal of this paper is to investigate the decomposition of aqueous solutions of Azorubin (E122), i.e., an azo dye used in food industry, in a pulsed gliding arc discharge reactor (direct treatment). Air and Argon as carrier gases with solution spray has been considered, as a first approach. The bleaching of the aqueous solution was observed immediately after direct plasma treatment and the decreasing of the dye concentration have been emphasized. Further more, the dye concentrati...
Autori: Marius Ursache
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26898

Abstract The design, the realization of the prototype and the acoustic standardization process of a novel periodic system made up of multiphysical phenomena scatterers as a road traffic noise reducing device are reported in this work. The structure analysed here, inspired by Sonic Crystals, has been designed following the guidelines established in recent works according to the concept of tunability. Thus, the acoustic barrier proposed here includes several mechanisms of noise control, such a...
Autori: Sergio Castińeira-Ibáńez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26900

Abstract The aim of this research was to find the optimal method of extracting oil from jatropha seeds and to discovery a technically viable process in which high quality biodiesel can be produced. To begin with, the oil extraction yield obtained with solvent extraction was 34%, using n-hexane in 2 hours. Then, the properties and fatty acid composition of jatropha oil were investigated. We must emphasize that jatropha oil contains about 11% of free fatty acids (FFA), which is far beyond the ...
Autori: Carmen María Fernández
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26909

Abstract The photocatalytic degradation (PCD) of methylene blue (MB) in aqueous suspensions of nano-sized TiO2 particles containing high concentrations of NaCl, MgCl2, and CaCl2 was studied. The rates of PCD and adsorption of ions were monitored by measuring the total organic carbon (TOC) and using inductively coupled plasma-atomic emission spectrometry, respectively. The results showed that the removal rate decreased with increasing concentrations of NaCl, MgCl2, and CaCl2. The trend for th...
Autori: Yuping Jiang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26910

Photodegradation caused by sun irradiation may be of major significance in the natural elimination process of pharmaceuticals and personal care products (PPCPs). The fate of metronidazole (MET) in surface water under solar irradiation was investigated. Several parameters affecting the photochemical degradation rate of MET were investigated, including the initial pharmaceutical concentration, continuous input and the presence of other pharmaceuticals like tinidazole (TNZ) with similar structur...
Autori: Bo Wu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26928

Aniline is a priority pollutant, which is known as a toxic organic pollutant released as effluent from several industries. Several physicochemical methods have been used for degradation of this pollutant. In this study, photocatalytic degradation of aniline from synthetic wastewater by ZnO nanoparticle was considered. The effects of different variables, such as irradiation time, the amount of photocatalyst, initial pH values and initial concentration of pollutant on the photodegradation of an...
Autori: Ahmad Jonidi Jafari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26929

In this study, response surface methodology (RSM) method was applied based on a five-level and four-variable central composite design. The optimization of the C.I. Direct Red 81 (DR81) removal by the combination of electrocoagulation (EC) and UV processes was also performed. The effect of initial pH, reaction time, current density and initial dye concentration on the dye removal was investigated to obtain the optimal experimental conditions. The optimal conditions with the dye removal of 95% ...
Autori: Elmira Pajootan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26942

Severe power shortages and poor performance of administrative demand response (DR) in China have motivated exploration of potentially more effective market-based approaches to promote DR deployment. We present a systems dynamics model for estimating DR-related costs and benefits to stakeholders. The model is used to study the performance of DR programs under various alternative incentive mechanisms. The systems dynamics process can quantitatively explain incentive-related obstacles in China ...
Autori: Beibei Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26945

One way to improve the performance of non-thermal plasma (NTP) reactor for volatile organic compound decomposition is by the introduction of ferroelectric materials into the discharge zone of NTP. This paper is a review of the breakthroughs and the current status of the applications of this technology for the abatement of volatile organic compounds (VOCs). It covers the process of energy generation in NTP, VOCs decomposition processes and the effects of critical factors such as type of packed...
Autori: Abdullahi Mohammed Evuti
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26948

The grafted polymer of P(MMA-MAh)- PEGME synthesized was used as adsorbent to remove phenol in aqueous solution. Through the adsorption research of phenol, it was found the removal percentage (%) of phenol was promising when pH was less than 6. With the adsorbent dose increasing, the removal percentage increased, meanwhile the adsorption amount qe (mg·g-1) correspondingly decreased. It was taken 35h for the phenol adsorption with the grafted polymer to reach the equilibrium. The study...
Autori: Yun Huang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26966

Waste recycling in steel industry by turning grain-size and powdery waste into pellets is a must now more than ever for economical motivation, in order to save raw materials and also for ecological reasons, as it leads to a cut down in the quantity of dumped waste. Industrial practice offers processors various technologies of waste recycling (agglomeration, briquetting, pelleting, mechanical mixture). The optimal variant should be chosen according to waste type, its content of useful elements...
Autori: Ana Virgina Socalici
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26968

Air pollution has a significant impact on human health and natural ecosystems. The principal gaseous pollutants compounds result from different types of combustion processes. In this category there are included carbon monoxide (CO), carbon dioxide (CO2), nitrogen oxides (NOx), dust and hydrocarbons. Nitrogen oxides are a group of highly reactive gases, which contain nitrogen and oxygen in varying amounts. Most of the nitrogen oxides are colorless and odorless gas. This paper highlights the c...
Autori: Doina Capşa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26988

Selenium (Se) is a mineral of fundamental importance for human health. Se status in general population is very important due to its remarkable benefits to the human body: antioxidant, hormonal regulator, anti-carcinogen. At the same time Se can be toxic leaving a narrow optimal range for optimal intake. Both excess and deficit are known to cause a wide range of clinical manifestations. Even though a large body of evidence provides vast information about Se, the exact molecular mechanisms of i...
Autori: Cristina Preda
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27016

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

Recently, environmental scientists have been focused their attention on the occurrence and the elimination of specific organic compounds in water. Among them, chlorophenols are considered to be a public health problem due to their carcinogenic properties. Thus, there is an important need to find new strategies to efficiently transform these compounds to no toxic or inactive by-products. In this work the photocatalytic removal of 2,4-dichlorophenol in water solution was investigated at laborat...
Autori: Lidia Favier
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27034

Renewable resources, biopolymers and bio-based materials are keywords of the sustainable development and environmental sustainability concepts. Biopolymers, the green alternatives to fossil fuel based polymers, have already found different feasible applications, from consumer goods to regenerative medicine. Keratin is the biopolymer contained in the skin derivatives and appendages and is one of the the proteins with the most sophisticated architecture nature could produce. It is found in huge...
Autori: Hossein Rajabinejad
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27043

In this paper both kinetic and thermodynamic parameters of thermochemical transformation of waste tires are evaluated by using thermogravimetric analysis (TGA). For rubber thermochemical decomposition, individually and in the presence of other tires components, some kinetic and thermodynamic parameters such as energy of activation (Ea), frequency factor (A), reaction enthalpy (ΔH), entropy (ΔS) and free energy (ΔG) have been calculated by using the integration method. The e...
Autori: Sana Kordoghli
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27060

This work evaluates the potential of Phyllanthus debilis for the adsorption of Zn2+ and Ni2+ ions using synthetic solutions. Adsorption experiments were performed in order to examine the effect of pH, contact time, biomass concentration and initial metal ion concentration in the removal process, in a batch mode. The results revealed that the adsorption is highly pH dependent. The adsorption of Zn2+ and Ni2+ ions were concentration dependent and increased from 2.446 to 8.688 mg/g for Zn2+ and ...
Autori: Mohammad Aslam
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27084

Heavy metal pollution is a major source of aquatic contamination and has deleterious effect on the environment, therefore treatment of the polluted sites and wastewater becomes very essential. Biofilm based bioremoval of heavy metals have been a new area of research. Bacterial strains belonging to the genus Bacillus, isolated from chromium polluted soil (Palar river basin, India) have been employed as consortium for Cr(III) removal from chrome tanning effluent. The bacterial isolates were fou...
Autori: Aafreen Fathima
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27086

This paper reports the potential of rice husk waste biomass to remove copper (II) from simulated wastewater under different experimental conditions. For this, rice husk has been pre–treated by boiling, formaldehyde and concentrated sulphuric acid. Fourier Transform Infrared Spectroscopy, Scanning Electron Microscopy and Energy dispersive analysis X–ray analyses were performed before and after adsorption, to explore number and position of the functional groups available for copper ...
Autori: Manjeet Bansal
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27095

Freshwater marshes are the single largest source of atmospheric methane (CH4). Climate change and anthropogenic nitrogen (N) deposition can alter the production and oxidation of CH4 respectively and thereby also CH4 exchange. But there was little known about how N regulate key carbon (C) processes, like CH4 production and oxidation under freshwater marshland conditions. In this study, field-fertilization and incubation experiments were conducted to investigate the effects of four N-fertilizat...
Autori: Lihua Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27107

Biological control relying on soil microorganisms may offer feasible and sustainable perspectives in many agrosystems for management of soil pests such as root-knot nematodes (RKNs, Meloidogyne spp.). The rhizosphere environment shows a complex of soil microbial communities, including beneficial organisms such as specialized bacterial pathogens and/or of rhizosphere fungi. New advanced technologies like Next Generation Sequencing (NGS) may enlarge our knowledge about the biodiversity and rol...
Autori: Aurelio Ciancio
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27109

Acetophenone can be enzymatically produced by conversion of methylbenzylamine using transaminase. The enzymatic process is strongly affected by the product inhibition, thus requiring the acetophenone removal from the media during its synthesis. In this purpose, the individual and selective extraction of acetophenone and methylbenzylamine with the biocompatible solvent nheptane containing 1-octanol, D2EHPA or TOA has been analyzed at three values of pH (5, 7, and 9). Regardless of the solvent ...
Autori: Lenuţa Kloetzer
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27111

This work focuses on treatment of lead polluted waste glass from urban collection (Pb≈5% wt) for its valorization as support in the immobilization of lipase, because soda-lime glasses are used in enzymatic catalysis. First of all, an extraction process of surface Pb was performed. The process is based on nitrilotriacetic acid (NTA) chelating agent. The operating conditions are: T=80°C, t=1h, pH 10, solid/liquid weight ratio=1/10, reagent concentration=0.1 M. Leaching tests at contr...
Autori: Luisa Barbieri
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27122

Microbial fuel cells (MFCs) are bioelectrochemical reactors that directly convert the chemical energy stored in chemical bonds of organic substrates, to electrical energy. Saccharomyces cerevisiae was implemented as biocatalyst in the anaerobic anode compartment of an MFC using glucose as carbon source and methylene blue as electron mediator. Our results showed the effect of methylene blue on the microbial metabolism and the reversibility of the redox reaction of the shuttle mediator in the p...
Autori: Ruggero Rossi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27131

The removal of quinoline from synthetic wastewater by heterogeneous photo-Fenton in a novel internal circulating fluidized-bed reactor was investigated systematically. The flow field in the reactor was simulated by FLUENT software conjoined with tracer particles experiment, and the influence of reaction parameters such as initial quinoline concentration, catalysts dosage and H2O2 dosage were evaluated. Results indicated that the designed reactor was suitable for the heterogeneous photo-Fenton...
Autori: Ran Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27142

Ozonation of oxytetracycline in aqueous solution with an activated carbon (AC)-supported cerium oxide (CeO2/AC) catalyst was conducted. The activity and stability of CeO2/AC, and the effects of ozone dosage, catalyst dosage, reaction temperature, initial oxytetracycline concentration, and initial pH on the catalytic activity of CeO2/AC for the removal efficiency of total organic carbon (TOC) were investigated. It was found that CeO2/AC catalyst was efficient in TOC removal during ozonation of...
Autori: Zheng-Qian Liu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27156

The effectiveness of thermal insulation materials mostly depends on their thermal conductivity. The low thermal conductivity is predetermined by density, structure, moisture content and temperature of material and, considerably less, by other indices. Loosefill cellulose insulation is allocated to the group of materials, the density of which fluctuates within large limits. This property is related not only to application of cellulose wool in different constructions, but also to technological ...
Autori: Sigitas Vėjelis
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27165

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

A new material containing 2-(2′ thiazolylazo) p-cresol (TAC) grafted poly acrylamide (PAA) was prepared and its adsorption ability was studied for the removal of inorganic mercury from aqueous media. Adsorption of Mercury (II) ions from aqueous solution was investigated in detail as a function of mercury concentration, pH, ionic strength, and temperature. The adsorption data were analyzed by using the Langmuir, Freundlich and Dubinin-Radushkevich (DR) models. The adsorption of Mercury (...
Autori: Selçuk Şimşek
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27170

The adsorbent gels utilized in this research project were synthesized from non-commercially available chitosan, obtained by deacetylation of chitin, which was isolated from fermented shrimp waste by a major local industrial food biopolymer. Chitosan-based adsorbent gels were used for the removal of a tris-azo dye (Direct Blue 71) from aqueous solutions. Sorption experiments focused on the chemical modification of chitosan using two cross-linking agents, sodium tripolyphosphate (TPP) and glutaral...
Autori: Reyna G. Sánchez-Duarte
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27184

Hesperaloe funifera was studied as a new raw material for paper manufacturing and lignin recovery. An experimental design was carried out to improve the quality of the obtained pulp varying the process temperature (155, 170 and 185 ºC), time reaction (20, 40 and 60 minutes) and soda concentration (5, 10 and 15 %). All experiments were carried out with 1% anthraquinone. Lignin content, holocellulose content, α-cellulose, viscosity, Kappa number and drainability were determined in the d...
Autori: MŞ Ángeles de Andrés
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27185

There has been a growing amount of work on microbial fuel cells (MFCs) in the last years, both on the microbiological issues and on the engineering ones, which managed to increase power outputs by an order of magnitude. However, they are technically still far from attaining acceptable levels of power output. Therefore, it is necessary to go deeper in understanding the mechanisms involved in electricity production with MFCs and use this new knowledge to achieve significant increases in power outp...
Autori: Vânia Oliveira
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27187

Waste from a cola beverage industry containing high concentration of phosphorus (P) was treated by the struvite precipitation method. The influence of excess of ammonia and order of reagent addition were evaluated as independent variables on the removal and recovery of phosphorus from cola beverage waste. It was removed about 95% of P of the sample in a short reaction time. The precipitated crystals were identified and analyzed by X-ray Diffraction (XRD), infra-red spectroscopy (IR) and surface ...
Autori: Wilson Roberto Barreto dos Santos
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27188

In this work, the effect of cyclic anaerobic/aerobic conditions on the biodegradative capability of the mixed microbial culture for the azo dye Acid Red 18 was investigated in the sequencing batch reactors. For this purpose, five anaerobic/aerobic sequencing batch reactors were operated under the same operation conditions at different anaerobic/aerobic reaction times. The whole reaction time was 22-h with anaerobic/aerobic periods of 6/16, 10/12, 14/8, 18/4 and 22/0 (h/h) in An/ASBR1 to 5, respe...
Autori: Mohammad Hakimelahi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27191

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

Various azodyes containing one or more sulfonic groups were removed from aqueous solutions by biosorption on untreated wood shavings from Picea abies. The sorption kinetics was described by the pseudo-first-order (PFO), pseudo-second-order (PSO) and modified pseudo-n-order (MPnO) equations, from which the MPnO model provided the best fit to the experimental data. The surface reaction was identified as a rate-limiting step governing the dye sorption on wood shavings, but a mixed kinetics (with a ...
Autori: Pavel Janoš
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27207

Banana stalk (BS) waste is used to remove Pb2+ from aqueous solution. Equilibrium data were analyzed with Langmuir and Freundlich adsorption models, which fit better in the former equation. The qmax (maximum metal uptake capacity) for Pb2+ adsorption was 105.14 mg/g of BS at pH 5.0, which followed pseudo-second order kinetics model. IR spectra confirmed the participation of hydroxyl, amino, and acidic functional moieties in the removal of Pb2+. The major mechanism involved in the biosorption of ...
Autori: Kashif Iqbal Sahibzada
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27214

This study compared performance of the O3/UV process and biotrickling filtration as standalone and combined system on elimination of toluene from a waste gas stream. The performance of the bench scale O3/UV reactor was investigated with inlet toluene concentration of 650 ppmv and reaction time of 7.5 s. The results demonstrated that the combined O3/UV process degraded 34.1% of toluene under the selected conditions. The biotrickling filter had a maximum elimination capacity of 125.6 g/m3.h, corre...
Autori: Gholamreza Moussavi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27228

In this research, Response Surface Methodology (RSM) was employed to optimize five operating variables including initial pH, current, reaction time, initial hexavalent chromium concentration and dosage of polyaluminum chloride as a coagulant for the removal of hexavalent chromium and its relative operating cost by electrocoagulation process. Central Composite Design (CCD) was applied for the optimization process. The results showed that increase of polyaluminum chloride dosage was beneficial for...
Autori: Sepideh Sadeghi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27230

The present study was aimed at examining the ability of the natural zeolitic tuff from the Zlatokop deposit in Serbia to remove Pb(II) ions from aqueous solutions under various conditions. It has been found that the adsorption proceeds via an ion-exchange reaction in which the Na+ ions from the clinoptilolite phase of the tuff are replaced to a high degree by aqueous Pb(II) ions. The removal capacity of the clinoptilolite at 298 K varies from 78 mg Pb g–1 (for C0 = 100 mg Pb dm–3) to...
Autori: Djordje Stojakovic
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27234

The effect of ceria content on the physicochemical properties and catalytic performance of nanostructured CeO2/Al2O3 for removal of toluene from waste gas stream was studied. The properties of the catalysts were addressed using XRD, FESEM, BET, TPR-H2 and FTIR techniques. XRD patterns confirmed the formation of CeO2 with average crystallite size of 7.8-8.7 nm. FESEM images confirmed the presence of fine particles between 25.2-189.1 nm. BET results showed that nanostructured CeO2/Al2O3 had high s...
Autori: Saeed Saedy
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27245

The capability of ornamental rocks solid waste (ORSW) as a low-cost sorbent was investigated in order to remove As(V) and Mn(II) from aqueous solution. Physical-chemical characterization analyses of the raw material presented albite and quartz as the main minerals. The solid waste presents low surface area (209.70 m2/g). The Langmuir, Freundlich, Sips (Langmuir-Freundlich), Redlich-Petersen and Tóth models were used to analyze sorption phenomena. The maximum sorption capability from the e...
Autori: Fernando Jorge Santos Oliveira
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27246

Rotifers are known as cosmopolitan organisms, found in high density in most waters, often representing the dominant group in terms of species diversity and abundance in the zooplankton community. Since the functionality of an ecosystem is closely related to the diversity of communities, analysis of rotifers assemblage may be a useful tool in understanding the mechanisms of the spatial and temporal changes on this level. Data were collected from 2008 until 2010, in distinct areas of Danube, Sf...
Autori: Larisa Florescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27247

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

This study investigates the adsorption of several metals in aqueous solution, by hemp materials (loose fibre and felted fibre). After characterization of the fibre, an extensive study was conducted on the adsorption properties of this material. The experiments were carried out in poly-metallic aqueous solutions containing Al, Co, Cr, Cu, Ni and Zn at a concentration of 1 mg L-1 and 10 mg L-1 each. The pH effect was found to lead to an optimum between pH 4 and 4.5. The kinetics of the adsorption ...
Autori: Justine Bugnet
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27272

Ammonium is an environmental contaminant encountered in water and soils, its admissible concentrations in soils and waters being established by legislation. Removal of ammonium ions from aqueous solutions from different matrix can be done with several sorbents, among which nano-adsorbents, such as oxidized exfoliated graphite nanoplatelets (ox-xGnP) offer practical solutions, based on their high specific surface area, associated sorption sites and efficiency of application. Several parameters su...
Autori: Daniela Bogdan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27273

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

The necessary oxygen concentration for the biological process depends on the organic matter present in wastewater characterized by organic matter reaction rate with oxygen, k. This article highlights the impact of the reaction coefficient on oxygen dispersion in water. The first stage of the research led to the determination of the ratio between the coefficient of reaction and the coefficient of dispersion on the vertical of the tank as k/εz ϵ [0.066 - 0.79]. Starting from this rat...
Autori: Corina Boncescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27298

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 paper aims to present the sorption properties of two sorbent substrates (composts) prepared by aerobic fermentation from vegetables waste composted with beech sawdust (BR2) and beech ash (BC1) to be used for Cu2+ removal from wastewaters. The composts structures and surface properties were characterised in terms of active groups (FTIR), crystallinity (XRD), morphology (SEM), topography (AFM) and specific surface and pores analysis (BET), and the changes in properties after Cu2+ sorption were...
Autori: Ileana Manciulea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27323

Arsenic removal from groundwater as drinking water source was investigated using electrocoagulation (EC) process with horizontal anodes of iron plate under galvanostatic regime. The current density of 5 A·m-2 was determined as the optimum operating conditions at the electrolysis time of maximum 25 minutes and pH ranged between 6.5 to 8.5, by which the arsenic concentration was reduced below 10 μg·L-1. The aspects related to the arsenic removal mechanism were discussed by Zeta...
Autori: Aniela Pop
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27327

Environmental education is an important field of study at the university level and also in the framework of adult education. Awareness about the environmental issues at global level is becoming increasingly important for the new society, representing one of the most significant factors for ensuring sustainability. In this respect, a number of European programs are addressed to the people willing to develop projects on this topic, aiming to stimulate the mobility of the involved staff, in order t...
Autori: Madlena Nen
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27345

The occurrence of spontaneous combustion phenomena in coal mines is generated by the reaction of mineral substance with atmospheric oxygen and favoured by the oxidation (self-ignition tendency) of coal, an oxidant environment and by the conditions in which heat exchange with the environment takes place. Preventing / Fighting against this phenomenon is regulated in the specific OHS requirements and in the General mining plan, comprising the technical and organisational measures for prevention an...
Autori: Cristian Tomescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27369

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 Rural Development Plan (RDP) represent the most important source of contributions and support for the agro-food sector companies in Italy. The European Community planning tool based on a European Structural and Investment Fund (SIE) allows the agricultural and forestry entrepreneurs to undertake projects and investments for the improvement of their companies. During the 2014-2020 RDP program, the Emilia-Romagna region (Italy), promoted a rewarding mechanism to support those companies car...
Autori: Enrico Gerboni
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27404

Two montmorillonitic clays were modified with N-(methoxy-polyethylene glycol) ethylene diamine and tested as sorbents for removal of Rare Earths (REs) from aqueous solutions. Lanthanum was chosen as representing element of REs family and adsorption tests were performed with the aim of selecting a system with good uptake efficiency for the pollutant abatement in wastewaters. The effects of pH were studied and the properties of the obtained final materials were evaluated with simple model syst...
Autori: Elena Maria Iannicelli-Zubiani
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27408

In this work, magnetic alginate was synthesized by encapsulating of Nickel Zinc Ferrite nanoparticle within Ca-alginate. The synthesized magnetic alginate was modified by ethylenediamine using microwave radiation to remove anionic dye from wastewater. The characteristics of magnetic nanoparticle, magnetic alginate and magnetic alginate amide (MAA) were studied using Fourier transform infrared (FTIR) and Scanning electron microscope (SEM). FTIR analysis confirmed the amidation of alginate. Di...
Autori: Niyaz Mohammad Mahmoodi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27424

One of the environmental problems caused by the large-scale livestock industry in China is odor pollution. Using the microbial strains with high deodorization efficiency is a feasible strategy to handle this problem. In this study, a Lactobacillus strain A2 with high efficient deodorization was isolated. To find the optimal deodorization conditions of strain A2, the deodorization efficiencies at different temperatures and inoculation quantities were tested. Our result showed that suitable tem...
Autori: Zhiying Yan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27447

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 negative effects of acid mine drainage (AMD) on the natural and human environments are well understood in South Africa, yet a robust and economic AMD treatment technology has not been developed. The current study aimed at exploring the performance of synthetic zeolite F9 in AMD treatment with specific focus on iron and manganese removal. For this, batch adsorption mode was adopted for which the effects of adsorbent dosage, initial pH and temperature were investigated. As a result, it was fou...
Autori: Mike Masukume
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27454

An evolutionary game of environmental regulation among local governments in China was established in this paper, and we analyzed the dynamic evolution rules of the environmental regulation strategy among local governments as well as the impact of environmental regulation on regional ecological efficiency in China by using the spatial panel simultaneous equations based on the panel data of various regions in China from 2007 to 2014. The research results show that the local government will adjust ...
Autori: Li Xing
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27471

Three modified bentonites, hydroxy-aluminum pillared bentonite (Al(OH)-Bent), cetyl trimethylammonium bromide modified bentonite (CTAB-Bent), and both cetyl trimethylammonium bromide and hydroxy-aluminum modified bentonite (Al(OH)-CTAB-Bent) were prepared and characterized by Fourier transform infrared spectroscopy (FTIR) analysis. Batch experiments were conducted on the adsorption of phenol at different temperatures, pH and initial concentration. The results indicated that adsorption capacity o...
Autori: Xiping Luo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27481

The Vrancea seismogenic area, located at the South-Eastern Carpathians in Romania, is generating extreme destructive subcrustal earthquakes in Europe. The largest events generated in the last ten years in the Vrancea subcrustal domain occurred on May 14, 2005 (01:53, 45.64oN, 26.53oE, h=149 km, Mw = 5.5), April 25, 2009 (17:18, 45.68oN, 26.62oE, h=110 km, Mw = 5.4) and October 6, 2013 (01:37, 45.67oN, 26.58oE, h=135 km, Mw = 5.2). The purpose of the present paper is to determine the seismic ...
Autori: Mircea Radulian
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27492

This study evaluated the performances of adsorption and Fenton oxidation for the removal of multilan red (MLR) and multi-active blue (MActB) dyes from aqueous solution. Zeolite, the adsorbent used in the study was modified using two surfactants: hexadecyltrimethylammonium bromide (HDTMA-Br) and cetyltrimethylammonium bromide (CTAB). The modified zeolite characterized using FTIR, SEM and XRD analysis. The modification studies revealed that HDTMA-modified zeolite exhibited better performance than ...
Autori: Jacob Kitinya
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27505

Papermaking tobacco sheet wastewater exhibits high content of fine suspended solids (SS), intensive color and low biodegradability. Through the process of electrocoagulation (EC) using aluminum anode and stainless steel net cathode, the performance of wastewater treatment and the evolution of the main components in wastewater were examined. Maintaining the pH of wastewater, with 40 mA/cm2 of current density, 2.5 g/L of NaCl for a reaction of 6 min duration, 66.1% of the total chemical oxygen dem...
Autori: Xiangjuan Ma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27509

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 paper introduces basic information on the biodegradation of polymers as well as the mechanisms of degradation and factors influencing this process. This paper describes prodegradant additives that induce decomposition of polymers to biodegradable compounds with regard to additives causing oxo-biodegradation. Based on the results of experiments conducted for molded pieces made of polypropylene and extrudates made of low density polyethylene with a d2w prodegradant additive, dependences betwe...
Autori: Tomasz Jachowicz
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27519

This work describes the variations in nitrogen (N) and phosphorus (P) removal performances and bacterial population dynamics in response to different influent C/N and C/P ratios in a novel BNR-IC process combining biological nutrients removal (BNR) with induced crystallization (IC). A good nutrients removal performance was achieved at 7.8 of C/N ratio and 23.3 of C/P ratio, where P and TN removal efficiencies were 94.0±2.4% and 90.5±4.3%, respectively. Moreover, significant changes...
Autori: Haiming Zou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27523

The potential use of a novel low-cost adsorbent, Eupatorium adenophorum Spreng, as a solution to remove Cr(VI) ions from aqueous was reported. Effects of various regulating parameters, such as pH value of reaction, adsorbent dosage and temperature, were investigated. To fit the adsorption equilibrium data, Langmuir isotherm and Freundlich isotherm were invoked. Additionally, thermodynamic parameters of the adsorption process, such as ΔG, ΔS and ΔH, were also calculated. The res...
Autori: Chen Jin-fa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27535

In this study major factors affecting the phenolation process of lignosulfonate (LS) waste liquor (recovered from pulp and paper industry) were optimized in order to improve LS substitution for replacing petroleum-based phenols during phenolic resin manufacturing. Four different parameters, namely phenol/lignosulfonate ratio, time, temperature and lignosulfonate waste liquor concentration, were varied in an experimental program having as response function the reaction yield. Response Surface Met...
Autori: Andrei Ionuţ Simion
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27551

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

Absorption of gases into liquids, with chemical reaction, is an important unit operation useful in many fields, especially synthesis of new products and waste gas treatment. Gas treatment means the separation of pollutants: acid gases, organic sulphur compounds, and other contaminants which may be found in gaseous streams. The absorption into liquid is a process almost exclusively used for removal of contaminants. The removal refers to retention of the majority of acid gases present in high conc...
Autori: Maria Harja
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27555

Fusarium Head Blight is caused by several Fusarium species. Infections can result in mycotoxin contamination on cereals and associated foods. Harvested products are contaminated due to its secondary metabolites. The aim was to analyse the occurrence of spike Fusarium and Alternaria spp. in hulled Triticum spelta L. wheat species via polymerase chain reaction (PCR) method and the deoxynivalenol (DON) content analysis. Three varieties of spelt were used (Ceralio and Rubiota – winter and one ...
Autori: Karel Suchý
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27562

Estrogens excreted by humans and animals are groups of endocrine disruptors, which degrade rapidly in soil and water as reported. This review focuses on biodegradation of estrone (E1), 17β-estradiol (E2) and 17α-ethynylestradiol (EE2) in surface water, STPs (sewage treatment plants), manure, soil and sediments, and illustrates possible pathways and mechanisms. In general, half-lives of EE2 are much longer than E1 and E2, because an ethinyl group at one hydroxyl group containing C-atom...
Autori: Hai-Liang Song
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27571

Plant growth promoting rhizobacteria (PGPR) colonize rhizosphere and enhance growth in crop plants, by producing various regulatory substances. Since PGPR employ diverse array of mechanisms and exact mechanism and role are still to be established. Therefor experiment was designed 1) to identify and 2) to select potential rhizobacterial strains based on their impact on the growth, physiological and enzymatic activities of rice. A CRD pot experiment with six PGPR isolates; two containing only ACC-...
Autori: Waseem Hassan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27587

β-glucosidases are very important in the improvement of cellulose degradation rates by diminishing the inhibition of end products. Although, cellulase cost has reduced significantly in last decade but still the high costs of biomass saccharification is one of the main challenges for the commercialization of ethanol from LC biomass. In this work, β-glucosidase immobilization in calcium alginate was optimized using response surface methodology. 89% immobilization efficiency was achieved ...
Autori: Ruchi Agrawal
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27614

The aim of this study is the treatment of Chlorothiazide in an aqueous medium by Electro-Fenton process using a Platinum anode. This pharmaceutical product is used to treat hypertension. Removal rates and mineralization efficiency have been analyzed under different operational conditions. Degradation kinetics well fitted to a pseudo–first–order reaction. Apparent rate constant of the oxidation of Chlorothiazide by electrochemically generated hydroxyl radicals was determined to be 9.4...
Autori: Saied Taieb
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27616

The thermal degradation of kenaf (Hibiscus cannabinus) under the effect of several variables (particle size, Ar flow rate, sample initial mass and heating rate) was investigated. From experimental data and by application of various model-free methods (Friedman, Kissinger-Akahira-Sunose and Flynn-Wall-Ozawa), the activation energies (EA) were calculated as a function of conversion. The results obtained allowed to conclude that kenaf follows a multi-stage degradation mechanism, with EA values rang...
Autori: Silvia Román
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27617

In the last two decades, countries in Central and Eastern Europe (CEE) have been undergoing some radical development changes. In the beginning of the 1990s economy as well as social and environmental issues have been affected by the transition to the market economy, globalization, and transition to the sustainability at the same time. As sustainable consumption patterns are one of the main preconditions for sustainability, this study focuses on consumption and some related policies in Lithuania,...
Autori: Renata Dagiliūtė
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27619

Water is currently becoming a strategically important material, and the importance of water and wastewater treatment technologies is therefore increasing. Wastewater from the food industry has many special features originating from its high organic matter content. Meat industry wastewater additionally has a high fat content. We investigated the effects of ultrafiltration and ozonation, individually and in combination, for the treatment of meat industrial wastewater. Ozone gas was generated from ...
Autori: Cecilia Hodúr
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27631

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

Copper pollution is common across the world and has caused serious public health problems recently. Among the conventional methods, adsorption has proved effective, economic, versatile and simple for the removal of aqueous Cu(II) contaminants. Deposits of natural Kaolin are abundant around the world, and are regarded as valueless due to its limited usage in industry. In this study, the adsorption behavior of natural Kaolin towards Cu(II) was evaluated. According to the results, the isothermal ad...
Autori: Qiang Tang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27651

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

The separate and simultaneous photocatalytic reduction of poisonous Cr(VI) and Ni(II) ions were examined with trace amounts of commercial titania nanoparticles (up to 50 mg/L). A direct irradiation photo-reactor, equipped with ultrasonic source was employed. The effects of four influencing parameters, catalyst dosage, pH, temperature and metal ions concentration ratio were investigated. The simultaneous operations, in the ternary Cr(VI)/Ni(II)/TiO2 system, show a synergism in reduction effici...
Autori: Javad Saien
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27662

Bacillus thuringiensis (Bt) is a spore-forming bacterium which produces insecticidal crystal protein in the sporulation phase. Polymerase chain reaction (PCR)-based identification of Bacillus thuringiensis toxin genes has become a routine step in most B. thuringiensis isolation and characterization initiatives. In the present study, eighteen native Bt isolates from diverse habitats of North India were taken for the presence of cry1 type genes. The distribution of cry1 gene families in native ...
Autori: Shiv Shankar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27666

In this work, PM2.5 removal mechanism was explored to investigate PM2.5 collection efficiency under the influences of applied magnetic field and diffusion charging (the main charging mode for submicron particle). The proposed electrostatic precipitators (ESPs) mathematical model considered three-field interaction between fluid field, electromagnetic field and particle dynamic field. CFD software FLUENT was used to generate the simplified solid structure of the ESP. In numerical calculation, t...
Autori: Jian-Ping Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27667

The reuse of sewage sludge will be increasing in the future, with expansion of sewerage works and advanced sewage treatments. During anaerobic digestion of sewage sludge from wastewater treatment plants the humification of organic matter will have an important effect on the physico-chemical forms of heavy metals. The aim of our paper was to investigate mobility of zinc from dried anaerobic sludge (DANS) from municipal wastewater treatment plant (WWTP) via single step (simultaneous) extraction pr...
Autori: Vladimír Frišták
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27695

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 paper aims to identify the influencing factors of the acceptable amount of compensation (AAC) of farmers for controlling fertilizer-induced water pollution, and build a valid ecological compensation mechanism to curb the water impact. To this end, the ecological compensation for farmers is viewed as a good way to reduce fertilizer-induced pollution at drinking water sources, and the opportunity cost is introduced into the discussion of farmers’ AAC. To avoid the gaps of previous studi...
Autori: Jie Lin
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27781

In the present study, Dowex HCR-S/H, cationic resin was used as a resin for the removal of cadmium from aqueous solutions. The experiments were carried out in a batch vessel. Subsequent experiments were performed as a function of initial solution pH, resin dosage, agitation time, initial Cd2+ concentration, solution temperature and agitation speed. Ion exchange rate increased with the increase in initial cadmium concentration, stirring speed and temperature. The Langmuir, Freundlich, Elovich,...
Autori: Baybars Ali Fil
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27777

Influence of soil pH on the mechanical characteristics of glass reinforced plastic (GRP) pipes type was often investigated in different situations encountered in the field. GRP degradation is directly proportional to the exposure to soil with non-neutral reaction. The theoretical and experimental results lead during time to design standards, which allow the application of GRP pipes in water and soil, so as minimum interferences with the materials used in the manufacture of pipes would appear. Sa...
Autori: Ana Diana Ancas
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27768

Changing wastes into raw materials is one of the most favored options for waste management, as it diverts wastes from landfill and saves resources. Fibers, either vegetable (cellulosic) or synthetic, may be added to cement pastes in order improve the properties of concrete or mortar by reinforcement. At the same time, if the source of fibers is wastes, then such processes make ways for recycling. In the work described here we studied the compatibility of residues from the nonwoven textile indust...
Autori: Hugo Monteiro
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27766

Bare zero-valent iron nanoparticles (bare-ZVIN) have a great tendency to aggregate, which drops their reactivity with pollutants. To address this issue, polyvinylpyrrolidone stabilized-ZVIN (PVP-ZVIN) was synthesized and used for the removal of Cd2+ from aqueous solution in a batch system. The effects of operation conditions such as the pH of aqueous solution (2-8), reaction time (0-120), adsorbent concentration (1-6 g L-1) and the initial Cd2+ concentration (10-60 mg L-1) on the removal efficie...
Autori: Amirhosein Ramazanpour Esfahani
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27764

This paper investigated the compressive strength and thermal conductivity of water and air cured Portland cement-fly ash-silica fume mortars. The results showed that density, compressive strength and thermal conductivity of blended cement mortars with fly ash were lower than Portland cement control. However, blended cement mortars that contained silica fume as replacement cement both in binary and ternary phase were higher than fly ash mixes and tends to increase with increase silica fume used a...
Autori: Chalermphan Narattha
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27731

Debris from deciduous trees in the form of park green waste was investigated as a potential biosorbent for the removal of chlorinated solvents from water. The sorption properties of beech leaves and cupules, oak leaves and acorns, birch leaves and lime leaves (all tree species common for a moderate climate) in a non-modified form were investigated with regard to the removal of perchloroethylene, 1,1,2-trichloroethane and 1,1,1,2-tetrachlorothane. The preliminary results showed that these biosorb...
Autori: Marek Tobiszewski
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27760

Electrochemical behaviour of YBaCo2O5 perovskite in alkaline solution was studied during oxygen insertion/release process. In correlation with electrochemical studies was analyzed the compound morphology and structure. Compound electrochemical oxidation consists in intercalation of oxygen atoms in crystalline structure, which is equivalent with a structure compaction. These results were correlated with the Brunauer-Emmett-Teller (BET) surface area of sample and also with SEM pictures. Compactio...
Autori: Mircea Dan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27866

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

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

Considering world energy demand and its security, much attention has been focused on identifying promising lignocellulosic substrates to generate a variety of downstream fuels and chemicals. In response, a recent key research area has centered on hydrolysis of cell wall polysaccharides by various physical, chemical and biological means. Due to their complex chemical and molecular structure, there is a substantial knowledge gap in understanding of biomass recalcitrance and its relationship wit...
Autori: Nadeem Akhtar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27908

The main aim of this paper was to obtain, on the base of sensitivity analysis, a guide for correct operation of the sewage treatment plant at Eforie Sud which uses sequential batch reactors (SBRs). For this purpose several original procedures were realized. An initial regression model was obtained using the SBR simulation with STOAT 5.0 software, confronted with the process data collected on-line. As it was expected, the range of these data was small, corresponding to the usual domain of SBR ...
Autori: Cristina Singureanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27923

Explosion-type accidents can cause significant human losses and material damages; therefore, special attention has to be granted to explosion risk assessments and to the development of appropriate explosion-protection measures. Such measures of protection aim to reduce the explosion risk to acceptable levels, in compliance with regulations and standards in force, so as to provide the proper safety level for humans as well as to prevent damage to the surrounding goods and environment. The flas...
Autori: Marin Silviu Nan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27961

Being able to estimate the quantity of pollutants that can be spread in the environment is a factor of paramount importance in the industrial panorama. In order to accomplish such aim, a crucial step is the estimation of the so-called source term, that is the rate of generation (or release) of a substance in a generic process. A proper estimation requires to consider both the machinery and the unit operations present into the analysed system. For such reasons, ad hoc considerations and models...
Autori: Marco Barozzi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27964

In the mineral matter of coal there are microelements chemically bounded to organic matter or mineral impurities in various combinations that catalyzes the evolution / involution of a spontaneous combustion phenomenon as an accelerator in the oxidation reaction or which slows down these processes. Specialised literature analyzes the phenomenon of coal self-heating based on several theories of which we exemplify the theory of coal oxidation, the theory of pyrite and the theory of the microele...
Autori: Cristian Tomescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27966

Atrazine is a herbicide used widely with a large quantity in Thailand and can contaminate in surface and groundwater. This work investigated atrazine removal from an aqueous solution by catalytic photodegradation using oxides of metal-cerium-zinc (M-Ce-ZnO, M = Ag, Fe, and Cu). ZnO is texturally modified with sticky rice starch template, doped with cerium (Ce) and either Ag, Fe, or Cu with the M:Ce:Zn molar ratio of 0.005:0.005:1. The catalysts were characterized by XRD, UV-Vis-DRS, and N2 adsor...
Autori: Pummarin Khamdahsag
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27974

Synthesis of silver nanoparticles (AgNPs) by plants is a simple, non-toxic and eco-friendly method. The purpose of this study was to develop a method for obtaining silver nanoparticles with biological properties. For reducing the silver ions, an extract of Tilia cordata (linden) flowers was used. Some parameters were investigated to optimize the synthesis method. Thus, the conditions of reaction were varied, such as pH, concentration of silver salt, different ratio of plant extract and silver sa...
Autori: Andreia Corciova
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27977

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 environmental and economic impacts posed by waste electrical and electronic equipment (WEEE) make an effective collection and recycling scheme necessary for developing countries. Currently, developing countries in the Asia-Pacific regions are highly variable in terms of their present state of WEEE management, due to different economic conditions and levels of management. In this paper, we surveyed existing WEEE collection and recycling system in three Asia-Pacific developing countries &nd...
Autori: Yuan Chen
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28034

In this research, optimization of Homogeneous Fenton process was performed using Multi-Criteria Decision Analysis (MCDA) and Taguchi method to remove Ciprofloxacin (CIP) from an aqueous phase. Analytic Hierarchy Process (AHP) is one of the most comprehensive systems designed for multi-criteria decision making. In this study, paired comparisons based on the AHP method were performed for three criteria including (i) CIP removal, (ii) COD removal and (iii) Sludge to iron ratio (SIR) to select th...
Autori: Marjan Salari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28040

The article describes a pilot study on a wastewater treatment plant operating a biogas plant (2.793 MW). The authors of the experiment used organic waste material, including: chicken fat with feathers (FF), molasses (M), glycerol (GL), raw sewage sludge (SS) and digested sewage sludge as an inoculum. The parameters of raw and digested sludge were compared, e.g. changes in the concentrations of ammonium nitrogen (N-NH4+), alkalinities, chemical oxygen demand (COD) and light metal ions. Potenti...
Autori: Agnieszka A. Pilarska
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28064

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

The normal operation of spray humidification air cooler hinges on the good contact between droplets and air in the humidification chamber. The spiral pressure nozzle was chosen for the experiment on inlet air spray cooling. During the experiment, the spray cooling performance and atomization features were examined, and the cooling effects of different nozzle layouts were compared.Through the analysis of heat and mass transfer, the critical pressure of the spiral pressure nozzle was determined, a...
Autori: Xiaoqing Huang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28110

To produce drinking water, the water treatment plants generate huge quantities of sludge, this sludge is a waste and they are evacuated to the dump. The valuation of these sludge will be benific This study focuses on the development of composite alginates beads and sludge activated chemically by sulphuric acid and thermally for the removal of dyes from aqueous solutions. Two dyes were studied; a basic cationic dye (methylene blue) and an acidic anionic dye (Congo red) to compare the adsorption m...
Autori: Hasna Elmontassir
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28125

The 2030 Agenda for Sustainable Development adopted in 2015 attracted wide international attention. China’s State Council issued the Development Plan for China’s Innovation Demonstration Zone for Implementation of the 2030 Agenda for Sustainable Development in 2016, which offered a Chinese prescription for global sustainable development. Implementation of the Plan is based on National Sustainable Development Pilot Zones (NSDPZs). This gives rise to the question of what adjustments a...
Autori: Junli Li
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28142

There are considerable environmental and health and safety concerns regarding liquid crystal display (LCD) waste glass because of the waste electrical and electronic equipment (e-waste) that is deposited in landfills. In current study, the effect of variation in LCD waste glass on the deconvoluted fractions of silicon centers of metakaolin geopolymers has been comprehensively investigated to discover the underlying mechanisms governing the performance. Solid/liquid ratio affects the kinetics of ...
Autori: Kang-Wei Lo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28146

As CO2 concentration levels in the atmosphere are steadily reaching a point of no return, it is paramount that actions are taken towards mitigating emissions by improving the efficiency of existing processes. Sorption-enhanced water-gas shift (SEWGS) combines the water-gas shift reaction with in-situ adsorption of CO2 on potassium-promoted hydrotalcite (K-HTC). This enables a direct conversion of syngas into separate hot streams of H2 at feed pressure and CO2 at regeneration pressure, making th...
Autori: Vlad-Cristian Sandu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28149

This work seeks to develop a suitable heavy metals precipitation modeling approach that could give reasonable results in mainstream use with industrial wastewater treatment. This paper is devoted to the thermodynamic analysis of the degree of precipitation of slightly soluble hydroxides and salts in industrial wastewaters in order to optimize the technological schemes of extraction and reuse of heavy metals from industrial waste. Based on the notion of the solubility product, the equations desc...
Autori: Igor Povar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28156

The contamination of aquatic and terrestrial environments by pesticides is highlighted by their possible toxic properties and poor biodegradability on the environment. The development of low cost by products from agricultural sectors as a suitable solution for contaminated areas remediation is of great environmental interest. Straw wastes can be considered as a promising alternative to remove different chemical compound that are environmentally toxic. In this study, some materials derived from ...
Autori: Irina Gabriela Cara
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28161

The pyrolysis of frying palm oil was studied in continuous stationary process, in a micropilot plant. The main factors affecting the products yields are temperature and residence time. For the studied parameters range (temperature: 475oC - 630oC and residence time: 120 s- 240 s), the gas yield varied between 7.9% (w/w) and 63.3% (w/w), related to feed. Unsaturated hydrocarbon yields (olefins) can reach 24-29% (w/w) related to feed, at the right processing parameters, the main products having goo...
Autori: Ana Maria Sivriu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28162

The paper covers the results of a study, carried out during 2005 and 2018, regarding the impact of sludge dump of a wastewater treatment plant from Iasi city, Romania, on the soil characteristics. Experimental research was conducted to highlight the evolution of the heavy metal content of both the material in the storage site and the soil in its proximity. The following heavy metal concentrations were analyzed with atomic adsorption spectrometry method: Zn, Ni, Cr, Pb, Co, Cu and Cd. Research ha...
Autori: Georgiana Cezarina Bartic Lazăr
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28164

Sodium silicate, iron sulfate, magnesium sulfate, and zinc sulfate were used as the raw materials to prepare a new inorganic polymer flocculant, polysilicate ferric magnesium zinc (PSFMZ), using direct recombination. The effects of molar ratio of zinc to silicon, ratio of iron to magnesium, reaction temperature, and reaction time on deoiling rate were explored. The optimal synthesis conditions for the flocculant for the thermal-washing treatment of oily sludge were determined. Results showed tha...
Autori: Lanlan Yu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28165

The study attempted to identify the best suited models to determine the kinetics of chlorine decay and trihalomethanes (THMs) formation in drinking water supplies. Batch experiments were conducted on synthetic water samples to simulate the characteristics of raw water collected from Maithon water treatment plant (MWTP), Dhanbad, Jharkhand, India. Influence of various parameters like total organic carbon (TOC), reaction time, pH and chlorine dose on the rate of THMs formation were analysed. The s...
Autori: Minashree Kumari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28171

There are substantial publications about the research of antibiotic resistance genes (ARGs). The purpose of this paper is to identify the global trends and performances of ARGs research. Literatures of ARGs that published between 1974 and 2016 from Web of Science Core Collection were used to create the bibliometric database for the present study in which we coupled cluster analysis and network analysis to visualize research trends of ARGs with international collaborations and trans-disciplinary ...
Autori: Chun-Li Zheng
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28176

The paper represents a multidisciplinary investigation of the relation between seismicity, active stress field and geological structure for the West of Romania. The study is based on revised and updated catalogues of earthquakes (3572 events) and focal mechanisms (89 solutions). The large spatio-temporal variations of the stress tensor parameters, b-value (b=0.74-0.81) and fractal dimensions of seismicity (D=1.05-2.34) highlight both clustering patterns along active fault systems and scattere...
Autori: Eugen Oros
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28188

This study investigates the capability of furnace bottom ash (FBA) as a filter media for phosphorus removal from wastewater effluents. Lab-scale studies were conducted, in which a mass of FBA was brought into contact with the phosphate solution (a predominant form of phosphorus in wastewater) in batch experiments and lab-scale filter. Intraparticle Diffusion Model (IPD) was applied and revealed that the mechanism of phosphate adsorption onto FBA consist of three phases; film phase occurred in...
Autori: Ali Alzeyadi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28191

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

Pollution with aromatic hydrocarbon has been rising because of the extreme usage of benzene containing compounds. Most of the people, animals and plants have been exposed to aromatic hydrocarbons due to polluted water sources. The aim of the present work was to carry out an experimental study for the photocatalytic degradation of aromatic hydrocarbon containing compounds by irontitanium- pillared interlayered clays (Fe-Ti-PILCs) and copper-titanium-pillared interlayered clays (Cu-Ti-PILCs). For ...
Autori: Beytullah Eren
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28249

Advanced oxidation processes (AOPs) are used with high efficiency in wastewater treatment due to the formation of hydroxyl radicals with high oxidation capacity. However, there exists many different variables which affect the efficiency of theses processes as it affects the amount of hydroxyl radicals formed; such as reaction time, pH, temperature, reactant concentrations and catalyst amount. In this study, the removal of 2-chlorophenol (2-CP) and 2,4-dichlorophenol (2,4-DCP), which are highly t...
Autori: Aysun Altikat
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28251

Due to the environmental deterioration because of pollution and excessive consumption of natural resources, governments are driving efforts to limit pollution emissions and to encourage cleaner manufacturing. The most common interventions governments adopted are providing subsidy to green products and taxing non-green products. With the green consciousness improving gradually, consumers prefer to buy products based on greenness of products with price and quality level together. In order to inve...
Autori: Yitong Ma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28258

TDue to the environmental deterioration because of pollution and excessive consumption of natural resources, governments are driving efforts to limit pollution emissions and to encourage cleaner manufacturing. The most common interventions governments adopted are providing subsidy to green products and taxing non-green products. With the green consciousness improving gradually, consumers prefer to buy products based on greenness of products with price and quality level together. In order to i...
Autori: Yitong Ma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28259

The olive oil extraction industry is one of the most polluting wastewaters from the food industry, which is considered an important economic activity in the world. The environmental effects of olive wastewater are related to chemical and organic loading, which is resistant to biodegradation processes. The purpose of this study was to determine the efficiency of combined electrocoagulation, catalytic ozonation, to reduce organic load and improve the biodegradability of olive oil sewage. The pres...
Autori: Mohammad Reza Khani
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28261

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

Pollution control is vital for human beings to create a harmonious living environment, and it is an important challenge for all countries worldwide. The emissions trading applicability in the market maker system can play an important role in the process of pollution control. To evaluate the effectiveness of the quotation trading system, it is necessary to develop a system strategy for market makers in emissions trading. In this paper, first the mechanism of the formation of the best offer to ma...
Autori: Aiqin Zhou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28276

Taking the sandy aquifer intruded by seawater in the lower reaches of Dagu River as the research object, the samples of underground freshwater, seawater and aquifer media were collected, and their composition and properties were determined. The seepage device was used to simulate the displacement process of seawater and freshwater. The relationship between permeability change of aquifer and hydrologic-geochemical action was studied. The mechanism of water sensitivity was explained by a hydrologi...
Autori: Jiaguo Ren
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28281

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

MABR (Membrane Aerated Biofilm Reactor) consists in an attached-growth process in which a gas permeable membrane is used as a biofilm carrier, and bubble-less oxygen transfer allows for a counter-diffusional mechanism where the electron donor (NH4+, biodegradable organics) and electron acceptor (O2) reach the biofilm from opposing sides. The paper reports results form the largest MABR installation in the world, demonstrating the beneficial impact of the technology in terms of improved process r...
Autori: Giuseppe Guglielmi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28299

Groundwater at an abandoned industrial area near Bergamo, Italy, was historically contaminated by tetrachloroethylene (PCE) (>100 μg/L) and, to a lesser extent, by trichlorethylene (TCE), dichloropropane (DP) and 1,1,2,2-tetrachloroethane (R-130). A liquid reagent (EHC® Liquid) was selected for remediation of groundwater at the site. The reagent is provided in two parts: EHC® Liquid Mix (a soluble organo-iron salt), and ELS® Microemulsion (a lecithin-based carbon substrate), a...
Autori: Alberto Leombruni
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28300

Oil-based drilling fluids are widely used in oil and gas exploration and development. Large amounts of oily drilling cuttings are produced in the drilling process, and improper treatment can cause serious secondary pollution. Chemical cleaning is commonly used to treat oily drilling cuttings. However, most degreasing agents are not environmentally friendly and can cause secondary pollution. Thus, the processing requirements of oily cuttings are difficult to meet. In this study, an environmental...
Autori: Zhiyong Li
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28313

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

In order to study the influence of different rainfall processes on the total pollutant load of non-point sources and pollutant load reduction rate of the low-impact development facilities, this paper took a Low Impact Development (LID) community of Tianfuheyuan, Fengxi new city, Xixian new district in Shaanxi, China as an example, and constructed the storm water management model (SWMM) of the study area. The computed results demonstrate that the storm patterns have obvious effects on the polluta...
Autori: Yu Tong
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28321

This article presents the existing problems of formation and further functioning agricultural land market with current trends in greening agricultural production and changes in the strategic reorientation of undertakings in agricultural markets. In this regard, there were suggested the best marketing strategies for businesses depending on their pricing strategy and evaluated problematic aspects of land reform in Ukraine. Attention is paid to the problems of further European integration of Ukrai...
Autori: Oksana Drebo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28327

The simple way to deal with obnoxious hexavalent chromium is to reduce it to its trivalent form, which is comparatively less toxic. In this article, Cr(VI) was reduced to Cr(III) using hydrazine. The effect of various process parameters such as molar ratios of Cr(VI) to N2H4, the temperature of the reaction, and the environmental chemistry of solution on the reduction kinetics have been evaluated. Experiments demonstrate an order of three for the reaction. The reaction was first order with resp...
Autori: Bharti Verma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28348