نتایج جستجو برای: benzene removal
تعداد نتایج: 161000 فیلتر نتایج به سال:
Abstract For the realization of small-scale biomass-to-liquid (BTL) processes, low-cost syngas cleaning remains a major obstacle, and for this reason simplified gas ultracleaning process is being developed. In study, low- to medium-temperature final based on adsorption organic solvent-free scrubbing methods was coupled pilot-scale staged fixed-bed gasification facility including hot filtration ...
Background:Benzene, as a carcinogen, is a volatile substance emitted in many workplaces including large plants, small factories, laboratories, hospitals, offices, and even homes. To assess the ability of Dracaena deremensis and Hedera helix plants for removing benzene, this study was conducted. Methods:In a laboratory trial study,6 two-year old plants were exposed to 46 microliter of benzene i...
Due to its excellent properties, polydimethylsiloxane (PDMS) foam has recently attracted significant academic and industrial attention. In this study, a facile green method was developed for PDMS synthesis. The prepared by using the gas foaming with eco-friendly materials, namely NaHCO3 as blowing agent acetic acid catalyst. By changing ratios of reactants curing temperature, foams varying prop...
Benzene, Toluene, Ethyl Benzene and Xylene are volatile organic compounds (VOCs) with approximately similar physical and chemical characteristics. Benzene and Ethyl-benzene are known carcinogen as well as they affect the circulatory, nervous, and reproductive and respiratory systems. Toluene and Xylene also damage the nervous and reproductive systems. The main purpose of this study is to determ...
Background and Aims: workers in petrochemical industries are exposed to various contaminants and are facing to serious hazards, therefore a comprehensive risk assessment program for identification of hazardous chemicals that affect human health and also determination of hazardous tasks and processes is necessary. Methods : This descriptive cross-sectional study was conducted in three stag...
In this study, nanoporous silica aerogel and silica aerogel-activated carbon composites have been synthesized using a water glass precursor by cost effective ambient pressure drying method. Equilibrium and kinetics of benzene and ethyl benzene adsorption on silica aerogel and its composites have been measured in a batch mode at tree weights of adsorbent. For the first time, the experimental dat...
Background: Benzene and ethyl benzene are important indoor air pollutants, even in low amounts in office environment may cause risk for staff. The purpose of this study was to evaluate and determine the amounts of these pollutants in the office environment air of Yazd hospitals. Methods: In a cross-sectional study, 18 samples of the air in office units of two hospitals were collected in Decemb...
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