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首页> 外文期刊>Environmental Science & Technology >Anaerobic Conversion of Chlorobenzene and Benzene to CH_4 and CO_4 in Bioaugmented Microcosms
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Anaerobic Conversion of Chlorobenzene and Benzene to CH_4 and CO_4 in Bioaugmented Microcosms

机译：生物强化微观过程中氯苯和苯的厌氧转化为CH_4和CO_4

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摘要

Chlorobenzene is a widespread groundwater contaminant found at many industrial sites. Reductive dechlorination of chlorobenzene requires input of electron donor and results in problematic accumulation of benzene, which is more toxic than chlorobenzene. We hypothesized that coupling a culture capable of reductive dechlorination of chlorobenzene to benzene with a second benzene-degrading methanogenic culture would completely detoxify chlorobenzene. To this end, active chlorobenzene-dechlorinating microcosms that were producing benzene were inoculated with a previously described enriched methanogenic benzene-degrading consortium. The combination resulted in the transformation of chlorobenzene via benzene to the nontoxic degradation products, CO_2 and CH_4. Sustainable degradation of chlorobenzene and benzene was observed in the microcosms and was further confirmed by shifts in the carbon isotopic ratios of chlorobenzene and benzene during degradation. Moreover, we could show that benzene derived electrons fueled chlorobenzene dechlorination removing the need to provide exogenous electron donor. The results have promising implications for sustainable bioremediation of sites contaminated with chlorinated benzenes and benzene.
机译：氯苯是在许多工业场所发现的广泛的地下水污染物。氯苯的还原性脱氯需要输入电子供体，并导致有问题的苯堆积，这比氯苯毒性更大。我们假设，将能够将氯苯还原脱氯为苯的培养物与第二种降解苯的产甲烷菌培养物偶联，将使氯苯完全解毒。为此，用先前描述的富集产甲烷的苯降解联合体接种产生苯的活性氯苯脱氯缩影。合并导致氯苯经苯转化为无毒降解产物CO_2和CH_4。在微观世界中观察到了氯苯和苯的可持续降解，降解过程中氯苯和苯的碳同位素比的变化进一步证实了这一点。此外，我们可以证明苯衍生的电子助长了氯苯的脱氯反应，从而消除了提供外源电子供体的需要。该结果对受氯苯和苯污染的地点的可持续生物修复具有潜在的启示。

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  • 来源
    《Environmental Science & Technology》 |2013年第5期|2378-2385|共8页
  • 作者

    Xiaoming Liang; Cheryl E. Devine; Jennifer Nelson; Barbara Sherwood Lollar; Stephen Zinder; Elizabeth A. Edwards;

  • 作者单位

    Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, ON M5S 3E5, Canada;

    Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, ON M5S 3E5, Canada;

    Department of Microbiology, Cornell University, Ithaca, New York 14853, United States;

    Department of Earth Sciences, University of Toronto, Toronto, ON M5S 3B1, Canada;

    Department of Microbiology, Cornell University, Ithaca, New York 14853, United States;

    Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, ON M5S 3E5, Canada;

  • 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
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