نتایج جستجو برای: mtbe concentrations and soil dosage of samples
تعداد نتایج: 24082462 فیلتر نتایج به سال:
abstract ion selective electrodes (ises) are electrochemical sensors that respond selectivity to the activity of ionic species. an ion-selective electrode is an electrochemical device that uses a thin selective membrane or film as the recognition element, and is an electrochemical half-cell equivalent to other half-cells of the zeroth (inert metal in a redox electrolyte). in common methods o...
in recent years, the nanoscale zero-valent iron (nzvi) particles have been used successfully for the degradation of hydrocarboncompounds and remediation of other pollutants. nevertheless, as far as we know, there is no specific study on the improvement of thegeotechnical properties of contaminated soils with hydrocarbon compounds by nzvi. this study used nzvi particles to remove gasoil in a cla...
plants are the most common bioindicatorsused in air quality biomonitoring studies because they are immobile and they have more sensitive to the most prevalent air pollutants than humans and animals. to identify the concentrations and sources of heavy metals in ornamental plants of isfahan landscape, samples of leaves and soil around pinuseldarica and nerium oleander were collected at different ...
Of all types of xenobiotics, pesticides such as herbicides play a significant role in soil and water pollution due to their widely usage all over the world. This study addresses the ability of organic amendments to enhance atrazine and metamitron degradation in two herbicide contaminated soils with contrasting textures under laboratory conditions. Soil samples were collected from surface soils ...
Purpose: The study of MTBE as one of addetive substance to gasoline composition is important. on the other hand lack of sufficient and precedents from it’s application on organisms, we have tried to study the effects of its in two gavage and respiratory methods on lung structure. Materials and Methods: Experiments have done on four mice groups: A: control, B: solvent, C: gavage, D: respiratory...
background: the aim of this study was to determine bioavailability heavy metal concentrations of cu, cd, cr, co and zn and health risk assessment in different types of klang district, selangor (malaysia) urban surface soil using in physiologically based extraction test in vitro human digestion model. methods: a total of 76 urban surface soil was sampled based on seven different types of land us...
Biocalcite infilling and bridging in a sandy soil was studied in the present research. Effects of 2 bacterial species (Sporosarcina pasteurii and Sporosarcina ureae), 3 reactant concentrations (0.5, 1.0, and 1.5 M of urea and CaCl2 mixture), and 6 reaction times (12, 24, 48, 96, 192, and 288 hr) on saturated hydraulic conductivity and mechanical strength of a sandy soil were studied as a factor...
An initial goal of the U.S. Geological Surveys National Water-Quality Assessment (NAWQA) Program is to determine the frequency of occurrence and concentrations of a wide range of anthropogenic and natural compounds in the Nations surface and ground water. A large number of contaminants are being monitored including volatile organic compounds (VOCs), pesticides, nutrients, and trace elements. ...
Background: High concentrations of various heavy metals of mine tailings can easily contaminate the environment. Such materials need monitoring and remediation to prevent them from polluting the environment and food chain. Materials & Methods: The concentrations of certain metals were evaluated in the soil samples at Sorkheh and Mazraeh copper mining areas in northwestern Iran, using three r...
The environmental fate and biological effects of the fuel oxygenate methyl-tertiary-butyl ether (MTBE) is of concern because, among other factors, it is highly soluble in water. Thus ground and surface water contamination may occur through accidental exposures and spills. Little is known about the biodegradability and ecotoxicity of MTBE. We found that MTBE added to carbon-limited microbial con...
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