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首页> 外文期刊>Environmental Science & Technology >Biofiltration and Inhibitory Interactions of Gaseous Benzene,Toluene,Xylene,and Methyl tert-Butyl Ether
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Biofiltration and Inhibitory Interactions of Gaseous Benzene,Toluene,Xylene,and Methyl tert-Butyl Ether

机译：气态苯，甲苯，二甲苯和甲基叔丁基醚的生物过滤和抑制性相互作用

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摘要

This study evaluated the individual and combined removal capacities of benzene,toluene,and xylene (B,T,and X)in the presence and absence of methyl fert-butyl ether (MTBE)in a polyurethane biofilter inoculated with a BTX-degrading microbial consortium,and further examined their interactive effects in various mixtures.In addition,Polymerase chain reaction-denaturing gradient gel electrophoresis and phylogenetic analysis of 16S rRNA gene sequences were used to compare the microbial community structures found in biofilters exposed to the various gases and gas mixtures.The maximum individual elimination capacities (MECs)of B,T,and X were 200,238,and 400 g m~(-3)h~(-1),respectively.There was no significant elimination of MTBE alone.Addition of MTBE decreased the MECs of B,T,and X to 75,100,and 300 g m~(-3)h~(-1),respectively,indicating that benzene was most strongly inhibited by MTBE.When the three gases were mixed (B + T + X),the removal capacities of individual B,T,and X were 50,90,and 200 g m~(-3)h~(-1),respectively.These capacities decreased to 40,50,and 100 g m~(-3)h~(-1)when MTBE was added to the mix.The MEC of the three-gas mixture (B + T + X)was 340 g m~(-3)H~(-1),and that of the four-gas mixture was 200 g m~(-3)h~(-1).Although MTBE alone was not degraded by the biofilter,it could be co-metabolically degraded in the presence of toluene,benzene,or xylene with the MECs of 34,23,and 14 g m~(-3)h~(-1),respectively.The microbial community structure analysis revealed that two large groups could be distinguished based on the presence or absence of MTBE,and many of the dominant bacteria in the consortia were closely related to bacteria isolated from aromatic hydrocarbon-contaminated sites and/ or oil wastewaters.These findings provide important new insights into biofiltration and may be used to improve the rational design of biofilters for remediation of petroleum gas-contaminated airstreams according to composition types of mixed gases.
机译：这项研究评估了在有BTX降解微生物联盟接种的聚氨酯生物滤池中是否存在甲基叔丁基醚（MTBE）的情况下，苯，甲苯和二甲苯（B，T和X）的单个和联合去除能力此外，采用聚合酶链反应-变性梯度凝胶电泳和16S rRNA基因序列的系统发育分析，比较了暴露于各种气体和气体混合物中的生物滤池中的微生物群落结构。 B，T和X的最大个体消除能力（MEC）分别为200,238和400 gm〜（-3）h〜（-1）。单独消除MTBE并没有显着消除.MTBE的加入会降低MEC B，T和X分别为75,100和300 gm〜（-3）h〜（-1），表明MTBE对苯的抑制作用最强。当三种气体混合时（B + T + X） ，单个B，T和X的去除能力分别为50、90和200分别为gm〜（-3）h〜（-1）.MTBE添加到混合物中时，容量分别降低到40,50和100 gm〜（-3）h〜（-1）。混合气（B + T + X）为340 gm〜（-3）H〜（-1），四混合气的混合气为200 gm〜（-3）h〜（-1）。单独使用生物滤池不会降解，它可以在甲苯，苯或二甲苯存在下，分别以34,23和14 gm〜（-3）h〜（-1）的MECs共同代谢降解。微生物群落结构分析表明，根据MTBE的存在与否可以将其分为两大类，并且该财团中的许多优势细菌与从芳香烃污染位点和/或石油废水中分离出的细菌密切相关。研究结果为生物过滤提供了重要的新见解，并可用于根据混合气体的成分类型改进生物过滤器的合理设计，以修复受石油气污染的气流。

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  • 来源
    《Environmental Science & Technology》 |2006年第9期|p.3089-3094|共6页
  • 作者

    EUN-HWA SHIM; JAISOO KIM; KYUNG-SUK CHO; HEE WOOK RYU;

  • 作者单位

    Department of Environmental Science and Engineering,Ewha Womans University,Seoul 120-750,South Korea,and Department of Chemical and Environmental Engineering,Soongsil University,Seoul 156-743,South Korea;

    Department of Environmental Science and Engineering,Ewha Womans University,Seoul 120-750,South Korea,and Department of Chemical and Environmental Engineering,Soongsil University,Seoul 156-743,South Korea;

    Department of Environmental Science and Engineering,Ewha Womans University,Seoul 120-750,South Korea,and Department of Chemical and Environmental Engineering,Soongsil University,Seoul 156-743,South Korea;

    Department of Environmental Science and Engineering,Ewha Womans University,Seoul 120-750,South Korea,and Department of Chemical and Environmental Engineering,Soongsil University,Seoul 156-743,South Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境化学;
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