Background and purpose: In the process of rapid urbanization and industrialization in developing countries, environmental pollution is a major concern. One of the fastest growing problems of environmental pollution is an excessive intake of lead in urban soils. Lead concentrations in urban soil may result from human activities such as vehicle emissions and industrial activit...

The massive production of methyl tert-butyl ether (MTBE), a primary constituent of reformulated gasoline, combined with its mobility, persistence and toxicity, makes it an important pollutant. It was considered recalcitrant until a few years ago, but recently MTBE biodegradation in aerobic conditions has been demonstrated with both mixed and pure cultures. Mixed cultures are generally the more ...

Concentrations measured in alfalfa plant stem segments indicated that plants grown in methyl tert-butyl ether (MTBE)-contaminated soil took up the chemical through their roots. Assuming a cylindrical shape for the plant stem, a mathematical model was developed to describe the transport of MTBE through the stems. Simulation results from uniform and nonuniform initial concentration distributions ...

soil contamination significantly reduces environmental quality and affects human health. to investigate and assess the effects of land use on the concentrations of some heavy metals in surface soils of golestan province, 227 soil samples (0-60 cm) were collected from three types of land uses including agricultural lands, natural, and industrial areas. the total metals and metalloids (cr, se, as...

Biodegradation of methyl tert-butyl ether (MTBE) by the hydrogen-oxidizing bacterium Hydrogenophaga flava ENV735 was evaluated. ENV735 grew slowly on MTBE or tert-butyl alcohol (TBA) as sole sources of carbon and energy, but growth on these substrates was greatly enhanced by the addition of a small amount of yeast extract. The addition of H(2) did not enhance or diminish MTBE degradation by the...

Gas Chromatography /Mass Spectrometry method of analysis was used to determine the presence and quantitative values selected Oxygenates Organic micropollutants in underground water oil spillage prone areas Lagos State Nigeria. The involved six samples with three collected from each sampled sites. were analyzed using GC/MS concentrations various oxygenates such as MTBE, Benzene, Methanol, Ethano...

Background: The concentrations and distributions of natural and anthropogenic radioactive materials in soils of the site of Rooppur Nuclear Power Plant (RNPP) were investigated with the aim of evaluating the environmental radioactivity and radiation hazard. Materials and Methods: Soil samples were collected from 40 locations in and around the proposed site of Rooppur Power Plant and determined ...

kamran asgari1, hosein amini2   1- organic farming systems, wageningen university, wageningen, the netherlands   2- faculty of agriculture, khorasgan branch, islamic azad university, isfahan, iran     received: 5 february 2011 accepted: 23 november 2011         *corresponding author: email:[email protected]     abstract   effects of soil and atmosphere pollution on some heavy metals (fe, ...

objectives the aim of this study was to assess soils of khorramabad metropolis in order to establish the concentration of lead and develop a contamination factor map. materials and methods soil samples were collected from 25 different urban parks in khorramabad, iran. the mean pb contents in the urban topsoil samples were compared with mean concentrations for other cities around the world. a sp...