Environmental engineering and management journal (ENVIRON ENG MANAG J )


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Publications in this journal

  • Environmental engineering and management journal 01/2015;
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    ABSTRACT: 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 regions by means of a Cost-Effectiveness Analysis (CEA). Three types of covers are evaluated: conventional multilayer, monolithic and mixed monolithic. The evaluation of the effectiveness of each alternative has been carried out with the HELP model (Hydrologic Evaluation of Landfill Performance), which allows for the estimation of the reduction of leachates. Results show that mixed monolithic cover is the most cost-effective alternative. In contrast, monolithic cover is an even worse alternative than the status quo, so its implementation may be not recommended in semiarid regions
    Environmental engineering and management journal 09/2014;
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    ABSTRACT: This study evaluates the behavior of freeze concentration of cheese whey (CW). Parameters studied were chemical oxygen demand (COD), total dissolved solids (TDS), suspended solids (SS), total settleable solids (TSS), pH and electrical conductivity (EC) in the concentrated cheese whey and in the ice. The final concentration of TDS reached was 25 ± 0.16 %wt for the liquid phase, which corresponds to a reduction of 83% of the initial volume. The COD in the ice fractions had lower values than the COD in the original cheese whey. The mean energy consumption was of 0.25 kWh/kg of ice. The results indicate that low levels of fat and low levels of salt in the cheese whey favor efficient freeze concentration. It can thus be concluded that effective skimming of the whey and minimizing the addition of salt improve the efficiency of freeze concentration and thus reduce the environmental impact.
    Environmental engineering and management journal 08/2014;
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    ABSTRACT: This research evaluated two electrokinetic remediation systems (EKR) for separating phenanthrene from bentonite and its electrochemical destruction by using a Boron Doped Diamond (BDD) electrode. The effect of the electrochemical potential for the oxidation of phenanthrene in liquid phase with BDD was analyzed by Normal Pulse Voltammetry and Hydroxyl Radical (●OH) analysis using the Spin Trapping Technique. The results showed that 70% of phenanthrene was removed from bentonite through EKR by applying 20 mA for 4 h in alkaline conditions, and that phenanthrene in solution was 100% degraded with BDD by applying 2.3 V vs Hg|Hg2SO4, for 2.5 h. These results demonstrate the potential application of the electrochemical technology in treating soils contaminated with highly toxic compounds, such as Polyaromatic Hydrocarbons (PAHs) and their final destruction using the EKR-BDD process.
    Environmental engineering and management journal 08/2014;
  • Environmental engineering and management journal 07/2014;
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    ABSTRACT: 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 effect 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 efficiency of Cd2+ were studied also. Furthermore, adsorption isotherms, kinetic and thermodynamic studies of Cd2+ removal were performed. Results of studies revealed that PVP could apparently enhance the colloidal stability of ZVIN and the removal efficiency of Cd2+. In addition, Increasing ZVINs concentration from 1 to 6 g L-1 enhanced Cd2+ removal efficiency while a sharp decrease was observed on Cd2+ removal efficiency by increasing the initial concentration of Cd2+ from 10 to 60 mg L-1. The experimental results showed that maximum Cd2+ adsorption was obtained at pH of 6 and 20 min of contact time. Moreover, the experimental adsorption of isotherm and kinetic data were completely followed the Freundlich isotherm model and Pseudo first-order kinetic model with maximum coefficients of determination (R2) of >0.98 and >0.99, respectively. Also, the obtained results of thermodynamic studies implied the influence of endothermic and spontaneous nature of Cd2+ adsorption onto ZVINs surfaces, at temperature range of 293-303 K. The findings of this study demonstrated that ZVINs could be applied as applicable adsorbents to remove Cd2+ from aqueous solutions.
    Environmental engineering and management journal 07/2014;
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    ABSTRACT: This study presents a Rough Set Analysis (RSA) application, partially based on dominance in relation to air micro-pollution management in an industrial place with a high environmental risk rate, such as the industrial area of Siracusa, located in the South of Italy. This new data analysis instrument has been applied to different decisional problems in various fields with considerable success. Therefore, it is believed that, it could also be used for the environmental issue related to multi-attribute sorting, considering both qualitative and quantitative attributes and criteria, such as sulphur oxides (SOx), nitrogen oxides (NOx), Methane (CH4), non methane hydrocarbons (NMCH) and some meteorological variables, such as air temperature and the relative humidity index. After outlining some basic concepts of the RSA theory, The most significant results obtained from the RSA specific application are presented and discussed particularly examples of decisional rules, attribute relevance and some other methodological features are offered to improve understanding and advantages of the approach. The decisional rules obtained can also be usefully implemented in order to explain and manage the risk of air pollution.
    Environmental engineering and management journal 07/2014;
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    ABSTRACT: An anaerobic-aerobic (An-Ox) sequencing batch reactor (SBR) was operated for the growth of phosphate accumulating organisms (PAOs), while an anaerobic-anoxic (An-Ax) SBR was used for the growth of denitrifying PAOs (dPAOs). Both reactors exhibited successful enhanced biological phosphorous removal (EBPR) performance. The sludge P contents in the two reactors increased from approximately 2% at the beginning of the operation to 9.1% (An-Ox SBR) and 7.3% (An-Ax SBR) after 140 d. The results of the quinone profile analysis demonstrated that the proportions of UQ-8, UQ-10, and MK-8 (H4) in the An-Ox sludge increased compared to the beginning of the operation, whereas in the An-Ax sludge, the proportion of UQ-8 was the highest and exhibited the greatest increase, and the mole fraction of UQ-9 more than doubled from 8.3% to 16.9%. Thus, the role of microorganisms with UQ-8 and UQ-9 was found to have significantly increased in the An-Ax sludge. As a result of microbial identification through the fatty acid methyl ester (FAME) analysis, Comamonas testosteroni and Pseudomonas alcaligenes, which produce the UQ-9 in the An-Ax sludge, as well as Psychrobacter immobilis, which produces UQ-8.
    Environmental engineering and management journal 07/2014; 2014:1-6.
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    ABSTRACT: Production and utilization of engineered nanoparticles (ENPs), which are smart materials with ability of sensing and destroying chemical contaminants, is growing rapidly. However, these materials seem to have some ecological and health adverse effects. Hence, the main goal of this review study is to give a brief description about the recent developments of the commercial available engineered nano particles in the environmental remediation and also to note the current state of findings about the toxic effects of such advanced materials. The key references revealed the potential in vitro and/or in vivo toxic effects of some ENPs which are commonly used in environmental remediation. However, with respect to highly potential physicochemical and biochemical properties of ENPs, the studies which have been carried out till now are not ample to obtain satisfactory exposure data for both human beings and the environment. Therefore, more surveys should be done in this field to fill the gap of high quality data and to develop new engineered nanoparticles with minimum toxicity.
    Environmental engineering and management journal 07/2014; Accepted-In press.
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    ABSTRACT: This article aims to investigate the Italian initiatives related to legislative simplifications as incentives for the dissemination of EMSs. An increasingly complex and varied environmental legislation entails many efforts by organisations such as SMEs that do not always have sufficient human and financial resources to meet all the obligations applicable to them. The goal of this article is therefore to analyse the main simplifications, describing their approach, operational modalities and the benefit that companies may receive if they have an environmental certification according to the standards of ISO 14001 or EMAS. The article classifies the types of simplifications (e.g. simplifications for obtaining or renewing a permit, simplification of inspections, tax breaks), highlighting their applicability at the national or regional level. Finally, the authors choose some examples of simplifications and try to examine the effectiveness of the regulations themselves, observing the increase in the number of certified organizations affected by those measures and comparing it with the average increase at the national level
    Environmental engineering and management journal 05/2014; 13(3):689-698.
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    ABSTRACT: The aim of this paper was to study the performance of a single-stage rotating biological contactor with supplemental aeration in terms of removal efficiency of organic and nitrogen content. Research was based on fifteen samples collected during the four year period. The wastewater was low strength with maximal measured concentration of 362 mg COD/l, 100 mg NH4/l, and 324 mg TSS/L. The maximal measured removal efficiency of COD (chemical oxygen demand) and TSS (total suspend solids) were 71% and 56%, respectively. The high rate of nitrogen removal was achieved using supplemental aeration. The removal efficiency of NH4, NO2 and NO3 were 83%, 60% and 52%, respectively.
    Environmental engineering and management journal 04/2014; 13(3):681-688.
  • Environmental engineering and management journal 03/2014;

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