نتایج جستجو برای: compound btex
تعداد نتایج: 128485 فیلتر نتایج به سال:
امروزه آلودگی آب یکی از بزرگترین مشکلات نوع بشر می باشد و از میان ترکیبات آلوده کننده آب ترکیبات btex (بنزن، تولوئن، اتیل بنزن و زایلن) ترکیباتی هستند که طیف گسترده ای از بیماری ها را به همراه دارند. زیست گزارشگرهای باکتریایی یکی از ابزاری هستند که توانایی سنجش کیفی و تا حدودی کمی آلودگی های زیست محیطی را دارا می باشند و این پتانسیل را دارند که جهت غربالگری نمونه های محیطی قبل از آنالیز دقیق آن...
The presence of benzene, toluene, ethylbenzene, and xylene compounds (BTEX) in the breathing air outside inside buildings is one most significant problems related to human health today. This study was performed determine concentration BTEX pollutants indoor environments. PhoCheck used detect compounds. In this study, (BTEX pollutant) assessed four spaces, including restaurants, laundries, hair ...
background: benzene, toluene, ethylbenzene and xylene (btex) are the most important toxic volatile compounds in the air and could be easily absorbed through the respiratory tract. in recent years, the risk of exposure to btex compounds, especially benzene as a carcinogen, has been considered in petroleum depot stations. objective: to assess the occupational exposure of petroleum depot workers i...
during natural gas processing, water in natural gas may cause to hydrates formation in pipelines which may lead to serious damages to process equipments. given the problems raised by present of water in natural gas, glycol solvent uses to remove water.in contact of glycol with gas always an amount of btex and voc absorb along with water, which on glycol recovery process, these substances separa...
––The oily mud waste is one of the main wastes in oil field production process, which also stands as a critical negative factor that impedes the improvement of oilfield environment. The oily mud, which is rich in oil and black viscous compound in appearance, is the solid waste that comes along with the oilfield production. The oily mud mixture has huge amounts in magnitude, and it contains a ce...
Issue addressed: International studies have consistently found that exposure to air pollutants is higher inside cars than outside. However, few studies have compared personal exposure to air pollutants by travel mode focusing on usual travel patterns. Objectives: To compare the exposure to benzene, toluene, ethylbenzene and xylene (BTEX) and nitrogen dioxide (NO2) for commuters in central Sydne...
The potential degradation of haloalkaliphilic hydrocarbon degrading bacteria is an interesting class of extremophilic organisms that possess special adaptation strategies that make them interesting for the remediation of polluted sites. Haloalkaliphilic pure culture using BTEX as a sole source of carbon and energy was isolated from water samples from Mediterranean Sea, Abu Qir-coastline, Egypt....
Abstract The levels of volatile organic compounds (VOCs) such as Benzene, Toluene, Ethylbenzene, and Xylene isomers (BTEX) are important parameters for an indoor air quality assessment. Exposure to BTEX in science laboratories a university can potentially cause health risks workers. Active sampling was carried out using Tenax® GR sorbent tubes analyzed with thermal desorption gas chromatography...
In this study, we developed a needle trap device packed with HKUST-1 (Cu-based metal-organic framework) for the sampling and analysis of benzene, toluene, ethylbenzene, xylene (BTEX) in ambient air first time. The was synthesized via electrochemical process. Afterwards, adsorbent into 22 gauge needles. To provide different concentrations BTEX, syringe pump connected to glass chamber inject spec...
مقدمه: بنزن، تولوئن، اتیل بنزن و زایلن (btex) از ترکیبات مهم خانواده آلاینده های آلی فرار هستند که استفاده گسترده ای در فرایندهای صنعتی دارند. این ترکیبات در گروه های مختلف مواد سرطانزا طبقه بندی شده و دارای سمیت عصبی هستند، بنابراین پایش و ارزیابی کیفیت هوای محیط های کاری جهت تعیین غلظت این آلاینده ها مسئله ای ضروری به نظر می رسد. روش کار: به منظور اندازه گیری غلظت ترکیبات btex در هوای محیط کا...
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