? Kinetics considerations concerning the oxidative degradation by photo-fenton process of some antibiotics ? Catalytic wet hydrogen peroxide oxidation of 4-chlorophenol over iron-exchanged clays ? Researches on the negative effects assessment (slugging, clogging, ash deposits) developed at the biomass-coal co-firing ? Contribution to the study of the environmental heritage of a former chemical plant ? Impact of chemicals on derivatives with important therapeutic activity in C...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25376

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

? ADSORPTION OF DYE FROM AQUEOUS SOLUTION USING SILVER WOOD SAWDUST CARBON ? TIME SERIES ANALYSIS OF THE HEAVY METALS LOADED WASTEWATERS RESULTED FROM CHROMIUM ELECTROPLATING PROCESS ? WATER QUALITY CHARACTERIZATION OF THE PRUT RIVER ? ETHICAL AND SUSTAINABLE EDUCATION OF ENVIRONMENTAL ENGINEERS - BETWEEN REALITY AND HOPE ? INTERACTIONS AMONG CLIMATE, VEGETATION AND SOILS IN RADUCANENI ? IASI AREA ? DISTRIBUTION OF MIXING INTENSITY OF OXYGEN-VECTOR DISPERSIONS IN AERATED...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25669

The paper analyses the removal efficiency and fluorescence spectroscopic characterization of landfill leachate dissolved organic matter (DOM) fractions in the combined stripping, fenton oxidation, sequence batch reactor, and coagulation process. The high contents of DOM of landfill leachate in each process unit were fractionated into HA, FA, and HyI. The result was the combined process availability for effective removal of DOM fractions. The removal rates for DOM, HA, FA and HyI were 91.9%, 97.1...
Autori: Zhiping Liu, Jin-song Guo, Fang Fanghttp://www.ecozone.ro/reviste.php?RID=25702

AbstractEU policy on waste management stresses the importance of an integrated approach to waste management, which includesconstruction of waste disposal facilities with prevention of waste generation and recycling, in line with management hierarchy:prevention of waste and its negative impacts; recovery of waste through recycling, reuse, safe final disposal of waste where thereis no possibility of recovery.This paper address the issue of municipal waste management and the impacts generated into ...
Autori: Ana-Maria Şchiopu, Cristina Ghinea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25987

AbstractThis paper is an analysis of a case study which entails the assessment of pollution degree with nitrate in the Prut river basin, byanalysing 23 wells. The novelty of this work is the use of modeling done by GIS techniques, namely the Digital Terrain Model(DTM) interpolation technique, to obtain further information starting from discrete information.In the present paper, we emphasized the increasing tendency of nitrates and nitrites content in the underground waters, in directcorrelation ...
Autori: Florian Statescu, Gabriela Biali, Lucian Vasile Pavel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26073

AbstractThe scope of the present paper is water management dimensioning closed to the copper mining area in the Medet region(Bulgaria). The mining works left an open pit and several waste rock dumps within the catchment area of Medetska River. Atpresent although the flooding of open pit is going on, it will be finished approximately in 2018. Water treatment is necessary dueto the high concentrations of pollutants (sulphate and copper) in the waters influenced by mining. The objective of the stud...
Autori: Gabriela Biali, Petra Schneider, Ralf Löser
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26077

Abstract Municipal waste landfill leachate results in different stages of waste stabilization and has a negative impact on the environment. When implementing a new policy on waste handling, monitoring landfill leachate should be carried out under conditions of a modern solid waste landfill. The paper discusses the quality of leachate observed in old and recently built landfills in Vilnius - the capital city of Lithuania. The landfills are situated at a distance of 20 kilometres fro...
Autori: Kristina Baziene
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26151

AbstractIn this work the adsorption of Cu2+ and Zn2+ from industrial wastewater by peanut shells without any pretreatment wasinvestigated through optimization techniques such as a feed-forward back-propagation artificial neural network and a simplexalgorithm. The Levenberg-Marquardt algorithm was the best back-propagation algorithm, with a minimum mean squared error of0.000217 for Cu(II) and of 0.000229 for Zn2+. Mean square error on the validation set is used as an estimate for variance.Accordi...
Autori: Başak Mesci
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26227

AbstractThis study aims to investigate the environmental impacts of the municipal waste disposal facility of Pata Rat, Cluj-Napoca, Romania during dry periods of the year. The environmental impact assessment on the landfill site was carried out on the basis of the measurements of environmental quality indicators. Environmental indicators were measured in the surface water, soil and air. For the assessment of the environmental impacts generated by landfill on surface water measurements were carri...
Autori: Ákos Rédey, Anca Gurzau, Antoanela Popovici, Constantin Măruţoiu, Fazekas Bence, , Ildiko Varga, Raluca Mariana Haţegan, Tatiana Yuzhakova
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26296

AbstractAnaerobic degradation (AD) of municipal solid waste (MSW) depends on the moisture and nutrient distribution within thebioreactor; these factors are affected by leachate recirculation. In this work, the effects of leachate recirculation of 15 to 120 byvolume percentage (%V) on AD were studied. The ojectives of this study are as follows: a) to determine which recirculation rateprovides the best conditions for accelerated anaerobic degradation (AD) and b) to determine the optimal range of r...
Autori: Maria del Consuelo Hernández-Berriel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26557

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

Abstract This paper presents the application of life cycle assessment (LCA) modelling used in the process of comparing the best technology for disposal municipal solid waste (MSW) in the Banjaluka region. Three scenarios were considered: unsanitary landfill, sanitary landfill with gas collection and burning on flare and sanitary landfill with energy recovery. The Banjaluka landfill is currently an unsanitary landfill because a system for collecting and treating gas has not yet been implement...
Autori: Draženko Bjelić
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26767

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

Abstract Treatment experiments for mature landfill leachate were conducted by using combined aged refuse bioreactor (ARB) process and sulfate radical oxidation. In the ARB process, the effects of wet/dry ratios, hydraulic loading, and influent introduction time on contaminant removal were investigated. In the oxidation process, Na2S2O8 was activated by heat to generate powerful oxidants, such as sulfate radicals, to oxide residual contaminants in the effluent. The removal of chemical oxygen ...
Autori: Zhanmeng Liu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26818

Abstract Composting has been attracting increased interest in the field of organic waste management. During composting, high-strength leachate is produced with a considerable amount of organic and inorganic pollutants. Lab-scale experiments were performed for the removal of chemical oxygen demand (COD) and chloride from compost leachate using a combined membrane system. The combined system consisted of microfiltration, ultrafiltration, and reverse osmosis (RO) membranes. The COD removal eff...
Autori: Vahide Şeyda Özyaka
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26847

Moving bed biofilm reactor (MBBR) technique is a useful technology for the treatment of mature landfill leachate. The reactor start-up and acclimation processes illustrated that many factors, such as biomass, C/N ratio, and influent volumetric loading rates, could affect the ammonium-nitrogen (NH4+–N) and COD removal. The factorial experiments were carried out to determine the optimal reactor operational conditions, and the results demonstrated that when DO 2-4 mg/L, pH 7.5, and hydraul...
Autori: Wei Li
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26932

The pickling liquor used in the stainless steel manufacturing process is a mixture of nitric and hydrofluoric acid which generates wastewater with nitrate concentrations ranging between 500 and 6000 mgNO3--N/L. In the present study, laboratory-scale anoxic Sequencing Batch Reactors (SBRs) were used to treat high nitrate wastewaters. Two different sludge inocula were tested: one from a Municipal Solid Waste Leachate Treatment Plant (LTP), and the other from a Sewage Treatment Plant (STP). Meth...
Autori: Ana Isabel Pelaez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26933

Landfilling is one of the most important issues that can be discussed nowadays related to waste management, mainly concerning the importance of what we have to do with waste quantities and how energy can be recovered. The paper proposes a threedimensional mathematical model applied to calculate the production capacity of leachate from Bihor landfill, situated in Bihor County, Romania. The leachate production capacity is related to the total amount of waste disposed in landfill during active ...
Autori: Mihai-Cosmin Belciu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27136

The removal of phthalic acid diesters PAEs, specifically di-n-butyl phthalate (DBP) and di(2-ethylhexyl) phthalate (DEHP), from leachates of a municipal solid waste incineration plant treatment process was studied. The leachates originated from the adjusting unit, the biochemical unit, the ultrafiltration membrane unit, and the reverse osmosis membrane unit. The initial concentrations of DBP and DEHP were 250.5 and 332.3 μg/L, respectively, which were correspondingly reduced to 4.2 and 2.2...
Autori: Hongyuan Liu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27143

Composted livestock waste (CLW) was studied as one low-cost material to remove Pb(II), Cu(II), Cd(II) and Zn(II) from simulated acid mine drainage (AMD) by batch and column experiments. The adsorption isotherm data were well fitted by the Langmuir model. The maximum monolayer adsorption capacities were 0.5485 mmol/g for Pb(II), 0.4092 mmol/g for Cu(II), 0.2246 mmol/g for Cd(II), and 0.1879 mmol/g for Zn(II) at pH 4.0. Due to the competition effect, the adsorption capacity of the single metal ion...
Autori: Mingliang Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27262

The aim of this study was to determine the actual impact of the uncontrolled landfill site in Roman town, Romania on the water resource quality. The surface water and groundwater samples were collected quarterly in two time periods: January 2012 - June 2013, when the landfill was operational and July 2013 - December 2014, after the landfill was closed. The parameters analyzed in this study include: pH, biological oxygen demand (BOD5), chemical oxygen demand (COD), NH4+ Cl-, NO2-, NO3-, SO42-, he...
Autori: Lacramioara Rusu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27283

Municipal Solid Waste (MSW) disposal is currently one of the major environmental issues in big cities. Several tools and techniques have been developed for Environmental Impact Assessment (EIA) of MSW disposal options, including scoping, checklists, matrices, qualitative and quantitative models and decision-support systems. Rapid Impact Assessment Matrix (RIAM) is a partially new method which is particularly advantageous over others as it provides a transparent and permanent record of analysi...
Autori: Zohreh Aliakbari-Beidokhti
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27465

In order to reduce the production of pollutants, it is most important that landfills are adapted to the climatic conditions of the area where they are located. In this sense, there are very few studies focused on how to reduce leachates from landfills in semiarid regions, which are especially sensitive to the impacts that this type of activity potentially has on water resources. The aim of this study is to identify the best type of landfill cover that reduces leachate production in semiarid regi...
Autori: Javier Senent-Aparicio
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27595

Two sets of simulated landfill reactors, namely conventional landfill (CL) and leachate recirculated landfill (RL) were operated to investigate the effect of leachate recirculation on the fractionation of Zn in municipal solid waste (MSW) landfill leachate. Zn in landfill leachate was fractionated into three fractionations: particulate and colloidal matter >0.45 μm, non-labile complexes <0.45 μm and free cations/labile complexes <0.45 μm. The result showed that the recirculatio...
Autori: Jun Yao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27648

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

Leachate production and management are recognized as one of the greatest problems associated with environmentally operations for landfills. Variations in leachate quality and quantity are related to rainfall depth and its infiltration processes into landfill. This work examines important hydrological problems of the Scarpino site (Genoa, northern Italy), a garbage dump which covers the valley of a first order flash creek with a surface of 100 hectares, located in one of the rainiest area of Ita...
Autori: Marco Mancini
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27788

In this study, the flocculating properties of different cactus juice preparations were assessed using synthetic and real industrial and leachate wastewaters. It was found that the crude CJ had a flocculating activity (FA) of 89 ± 2.2% which is significantly higher than that of a powdery sample derived from a 60°C oven-dried CJ sample and which was about 37.8 ± 2.5%. Interestingly, both crude and dried samples showed the ability to flocculate kaolin suspensions within a wide ...
Autori: Moncef Khadhraoui
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27887

Nanoparticles (NPs) have recently been concerned as emerging contaminants. Determination of NPs in different environmental compartments is a revealing topic for researchers studying their impacts in nature. Various methods of analysis have been reported in literature for their measurement and recovery. However, there are difficulties in their quatification in landfill leachate. Taking into account varying landfill components and their possible interactions with NPs, different types of NPs wer...
Autori: Ceyda Senem Uyguner-Demirel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27989

Iodine is an essential microelement required by humans and animals. Leaching of soils under intensive rains has threatened the fertility status of iodine in soils. Therefore, four discrete amendments were used for the mitigation of iodine leaching from soils. For this study, soils collected from four land uses were mixed with the amendments (gypsum, lime, fly ash, charcoal and sawdust) at the rate of 0, 2.5% and 5% (w/w) in PVC columns. Potassium iodide (KI) was applied to the soil at rate of 10...
Autori: Muhammad Mohiuddin
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28071

The goal 12 of the 2030 Agenda for Sustainable Development takes into consideration the responsible consumption and production in the perspective of circular economy. The agri-food sector is more actively involved in these initiatives, because it offers the possibility to exploit waste and by-products, by adopting suitable biotechnologies. Such processes can be carried out either under aerobic conditions, for the production of compost, or anaerobically, for the production of biogas. In this work...
Autori: Veronica Novelli
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28078

The increase of population and the bad management of municipal solid waste (MSW) lead to a spectacular increase of the landfill leachates volume. These effluents represent a very harmful threat that can affect the environment and the ecosystems, their control and treatment became the first occupation of the authorities. In this context, this study contributes to characterize the landfill leachate composition and how its changes over different seasons. The results have shown an intermediate leac...
Autori: Soukayna Rhouat
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28100

The production of food wastes is a serious issue in developed and developing countries. The biogas production technology is one of the most sustainable methods for treating food wastes. Currently, there is a great need to implement suitable methods to enhance biodegradation and methane production. This study investigated the effect of manure addition and leachate lime-pretreatment on the biogas and methane production from spoilable municipal solid wastes using a hybrid anaerobic-aerobic bioreact...
Autori: Fatemeh Aliasgari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28123