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首页> 外文期刊>Environmental Science & Technology >Field Evidence for Co-Metabolism of Trichloroethene Stimulated by Addition of Electron Donor to Groundwater
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Field Evidence for Co-Metabolism of Trichloroethene Stimulated by Addition of Electron Donor to Groundwater

机译：在地下水中添加电子给体刺激的三氯乙烯共代谢的现场证据

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摘要

For more than 10 years, electron donor has been injected into the Snake River aquifer beneath the Test Area North site of the Idaho National Laboratory for the purpose of stimulating microbial reductive dechlorination of trichloroethene (TCE) in groundwater This has resulted in significant TCE removal from the source area of the contaminant plume and elevated dissolved CH_4 in the groundwater extending 250 m from the injection well. The δ~(13)C of the CH_4 increases from -56‰ in the source area to -13‰ with distance from the injection well, whereas the δ~(13)C of dissolved inorganic carbon decreases from 8‰ to -13‰, indicating a shift from methanogenesis to methane oxidation. This change in microbial activity along the plume axis is confirmed by PhyloChip microarray analyses of 16S rRNA genes obtained from groundwater microbial communities, which indicate decreasing abundances of reductive dechlorinating microorganisms (e.g., Dehalococcoides ethenogenes) and increasing CH_4-oxidizing microorganisms capable of aerobic co-metabolrsm of TCE (e.g., Methylosinus trichosporium). Incubation experiments with ~(13)C-labeled TCE introduced into microcosms containing basalt and groundwater from the aquifer confirm that TCE co-metabolism is possible. The results of these studies indicate that electron donor amendment designed to stimulate reductive dechlonnation of TCE may also stimulate co-metabolism of TCE.
机译：十多年来，为了促进地下水中三氯乙烯（TCE）的微生物还原性脱氯作用，电子施主被注入爱达荷州国家实验室测试区北侧下方的蛇河含水层中。从注入井延伸250 m的地下水中污染物羽流的源区和溶解的CH_4升高。 CH_4的δ〜（13）C随距注入井的距离从源区的-56‰增大至-13‰，而溶解的无机碳的δ〜（13）C则从8‰减小至-13‰ ，表明从甲烷生成转变为甲烷氧化。 PhyloChip芯片分析了从地下水微生物群落获得的16S rRNA基因，证实了沿羽流轴的微生物活性发生了变化，这表明还原性脱氯微生物（如Dehalococcoides ethenogenes）的丰度降低，而具有好氧共生能力的CH_4氧化微生物增多。 TCE的代谢（例如，甲基骨孢霉）。将〜（13）C标记的TCE引入含水层中包含玄武岩和地下水的微观世界中的温育实验证实，TCE共代谢是可能的。这些研究的结果表明，设计用于刺激TCE还原性脱碳的电子供体修饰也可能刺激TCE的共代谢。

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  • 来源
    《Environmental Science & Technology》 |2010年第12期|P.4697-4704|共8页
  • 作者

    MARK E. CONRAD; rnEOIN L. BRODIE; COREY W. RADTKE; rnMARKUS BILL; MARK E. DELWICHE; rnM. HOPE LEE; DANA L. SWIFT; FREDERICK S. COLWELL;

  • 作者单位

    Mailstop 70A-4418, E. O. Lawrence Berkeley National Laboratory, Berkeley, California 94720;

    rnMailstop 70A-4418, E. O. Lawrence Berkeley National Laboratory, Berkeley, California 94720;

    rnIdaho National Laboratory, P.O. Box 1625, Idaho Falls, Idaho 83415;

    rnMailstop 70A-4418, E. O. Lawrence Berkeley National Laboratory, Berkeley, California 94720;

    rnIdaho National Laboratory, P.O. Box 1625, Idaho Falls, Idaho 83415;

    rnNorth Wind, Inc., 1425 Higham Street, Idaho Falls, Idaho 83402;

    rnNorth Wind, Inc., 1425 Higham Street, Idaho Falls, Idaho 83402;

    rnIdaho National Laboratory, P.O. Box 1625, Idaho Falls, Idaho 83415 104 COAS Administration Building, Oregon State University, Corvallis, Oregon 97331;

  • 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);
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