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首页> 外文期刊>Journal of Hazardous Materials >Successful microcosm demonstration of a strategy for biodegradation of a mixture of carbon tetrachloride and perchloroethene harnessing sulfate reducing and dehalorespiring bacteria
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Successful microcosm demonstration of a strategy for biodegradation of a mixture of carbon tetrachloride and perchloroethene harnessing sulfate reducing and dehalorespiring bacteria

机译：成功地缩影展示了利用硫酸盐还原和脱卤呼吸细菌对四氯化碳和全氯乙烯混合物进行生物降解的策略

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摘要

Carbon tetrachloride (CT) is known to inhibit the transformation of perchloroethene (PCE) to ethene by dehalorespiring bacteria, creating a challenge for the bioremediation of environments contaminated with both compounds. We report on the sequential use of sulfate reduction and dehalorespiration as a microbial strategy for the transformation of a mixture of CT (10 μM) and PCE (14 μM). Sulfide production in Desulfovibrio vulgaris cultures led to complete CT disappearance in as little as 12 days. The addition of amorphous ferric oxide decreased the proportion of chloroform (CF) produced from 65% to 30%. CT conversion rates were enhanced more than 13-fold where vitamin B_(12) (5 μM) was added. In vitamin B_(12)-containing D. vulgaris cultures, no chlorinated products were detected and carbon disulfide was the major product of CT transformation. PCE concentrations were not impacted upon by D. vulgaris activity. The subsequent inoculation of a PCE-respiring enrichment culture resulted in microbial PCE dechlorination to ethene.
机译：众所周知，四氯化碳（CT）会抑制呼吸道除菌，从而抑制全氯乙烯（PCE）向乙烯的转化，这对用这两种化合物污染的环境进行生物修复提出了挑战。我们报告了依次使用硫酸盐减少和除汗作为微生物策略来转化CT（10μM）和PCE（14μM）的混合物。寻常脱硫弧菌培养物中硫化物的产生导致在短短12天内CT完全消失。加入无定形三氧化二铁将产生的氯仿（CF）的比例从65％降低到30％。添加维生素B_（12）（5μM）时，CT转化率提高了13倍以上。在含有维生素B_（12）的D. vulgaris培养物中，未检测到氯化产物，而二硫化碳是CT转化的主要产物。普通螺旋藻的活性不会影响PCE的浓度。接种PCE呼吸富集培养物后，导致微生物PCE脱氯为乙烯。

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  • 来源
    《Journal of Hazardous Materials》 |2012年第15期|p.169-175|共7页
  • 作者

    Joanna C. Koenig; Matthew J. Lee; Mike Manefield;

  • 作者单位

    Centre for Marine Bioinnovation, School of Biotechnology and Biomolecular Sciences. University of New South Wales, Sydney NSW 2052. Australia;

    Centre for Marine Bioinnovation, School of Biotechnology and Biomolecular Sciences. University of New South Wales, Sydney NSW 2052. Australia;

    Centre for Marine Bioinnovation, School of Biotechnology and Biomolecular Sciences. University of New South Wales, Sydney NSW 2052. Australia;

  • 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
  • 关键词

    carbon tetrachloride; perchloroethene; sulfate; iron; dehalorespiration;

    机译：四氯化碳;全氯乙烯硫酸盐铁;排汗;

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