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首页> 外文期刊>Environmental Science & Technology >Aerobic Biotransformation of Polybrominated Diphenyl Ethers (PBDEs) by Bacterial Isolates
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Aerobic Biotransformation of Polybrominated Diphenyl Ethers (PBDEs) by Bacterial Isolates

机译：细菌分离物对多溴联苯醚（PBDEs）的有氧生物转化

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摘要

Polybrominated diphenyl ethers (PBDEs) are flame retardants that have been used in consumer products and furniture for three decades. Currently, very little is known about their fate in the environment and specifically about their susceptibility to aerobic biotransformation. Here, we investigated the ability of the polychlorinated biphenyl (PCB) degrading bacteria Rhodococcus jostii RHA1 and Burkholderia xenovorans LB400 to transform mono- through hexa-BDEs at ppb levels. We also tested the PBDE transforming abilities of the related strain Rhodococcus sp. RR1 and the ether-degrading Pseudonocardia dioxanivorans CB1190. The two PCB-degrading strains transformed all of the mono- through penta-BDEs and strain LB400 transformed one of the hexa-BDEs. The extent of transformation was inversely proportional to the degree of bromination. Strains RR1 and CB1190 were only able to transform the less brominated mono- and di-BDE congeners. RHA1 released stoichiometric quantities of bromide while transforming mono- and tetra-BDE congeners. LB400 instead converted most of a mono-BDE to a hydroxylated mono-BDE. This is the first report of aerobic transformation of tetra-, penta,- and hexa-BDEs as well as the first report of stoichiometric release of bromide during PBDE transformation.
机译：多溴二苯醚（PBDE）是阻燃剂，已在消费品和家具中使用了三十年。目前，关于它们在环境中的命运，特别是关于它们对有氧生物转化的敏感性了解甚少。在这里，我们研究了多氯联苯（PCB）降解细菌Rhodococcus jostii RHA1和Burkholderia xenovorans LB400的能力，以ppb浓度转化单溴代六溴二苯醚。我们还测试了相关菌株Rhodococcus sp。的PBDE转化能力。 RR1和降解醚的拟恶性假性心动过氧假单胞菌CB1190。两种降解PCB的菌株转化了所有的单-五溴二苯醚，而LB400菌株转化了六溴联苯醚之一。转化程度与溴化程度成反比。菌株RR1和CB1190仅能转化溴化程度较低的单BDE和双BDE同系物。 RHA1在转化单BDE和四BDE同系物时释放了化学计量的溴化物。 LB400却将大多数单BDE转化为羟基化的单BDE。这是对四溴联苯醚，五溴联苯醚，六溴联苯醚和六溴二苯醚进行好氧转化的第一份报告，也是PBDE转化过程中化学计量释放溴化物的第一份报告。

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  • 来源
    《Environmental Science & Technology》 |2009年第15期|5705-5711|共7页
  • 作者

    KRISTIN R. ROBROCK; MEHMET COELHAN; DAVID L. SEDLAK; LISA ALVAREZ-COHEN;

  • 作者单位

    Department of Civil and Environmental Engineering, University of California, Berkeley, CA Exponent, 500 12th St Suite 220, Oakland, CA 94607;

    Research Center for Brewing and Food Quality, Technical University of Munich, Germany;

    Department of Civil and Environmental Engineering, University of California, Berkeley, CA;

    Department of Civil and Environmental Engineering, University of California, Berkeley, CA Earth Science Division, Lawrence Berkeley National Laboratories, Berkeley, CA;

  • 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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