نتایج جستجو برای: compound btex
تعداد نتایج: 128485 فیلتر نتایج به سال:
In this 10 year study, Brazilian gasoline (100 L, containing 24% ethanol by volume) was released to a sandy aquifer to evaluate the natural attenuation of benzene, toluene, ethylbenzene, and total xylenes (BTEX) in the presence of ethanol. Groundwater concentrations of BTEX, ethanol, and degradation products (e.g., acetate and methane) were measured over the entire plume using an array of monit...
Benzene, toluene, ethylbenzene and xylenes (BTEX) contamination is a serious threat to public health and the environment, and therefore, there is an urgent need to detect its presence in nature. The use of whole-cell reporters is an efficient, easy-to-use and low-cost approach to detect and follow contaminants outside specialized laboratories; this is especially important in oil spills that are...
Twenty freshwater eels caught in Flanders (Belgium) were analysed by GC-MS for a total of 52 VOCs. The most prominent VOCs are the BTEX and a number of chlorinated compounds such as chloroform and tetrachloroethene. The observed concentrations which, typically, were in the low ng/g wet weight range, could be linked to the major emission sources and the present study gives new evidence that comb...
Porous asphalt pavement (PAP) with a high drainage capacity was modified powdered activated carbon (PAC) addition to produce permeable reactive (PRP), which may exhibit the potential reduce environmental non-point source (NPS) pollution. The experimental design mixtures used and test PRP incorporated PAC (named PRP-PACs) were conducted as follows: first, PACs initially tested determine their fe...
زرقان در 25 کیلومتری شمال شرقی شیراز همواره تحت تأثیر آلایندههای متعددی واقع شده است. بنزن، تولوئن و اگزیلن از آلایندههای مهم هوا به شمار میروند. منابع آلاینده در اطراف زرقان سهم مهمی در ایجاد این آلایندهها دارند. در این مطالعه 10 ایستگاه انتخاب و از طریق جاذبهای استانداردشدة گروه بنزن، تولوئن، اتیل بنزن و اگزیلن (BTEX) به روش پسیو نمونهبرداری شدند. نمونهها پس از دو هفته تماس با هوای م...
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