...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Complete Debromination of Tetra- and Penta-Brominated Diphenyl Ethers by a Coculture Consisting of Dehalococcoides and Desulfovibrio Species
【24h】

Complete Debromination of Tetra- and Penta-Brominated Diphenyl Ethers by a Coculture Consisting of Dehalococcoides and Desulfovibrio Species

机译：由Dehalococcoides和Desulfovibrio物种组成的共培养对四溴和五溴二苯醚进行完全脱溴

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Polybrominated diphenyl ethers (PBDEs) are widespread global contaminants due to their extensive usage as flame retardants. Among the 209 PBDE congeners, tetra-brominated diphenyl ether (tetra-BDE) (congener 47) and penta-BDEs (congeners 99 and 100) are the most abundant, toxic, and bknccumulative congeners in the environment However, little is known about microorganisms that carry out debromination of these congeners under anaerobic conditions. In this study, we describe a coculture GY2 consisting of Dehalococcoides and Desulfovibrio spp., which is capable of debro-minating ~1180 nM of congeners 47,99, and 100 (88-100% removal) to the nonbrominated diphenyl ether at an average rate of 36.9, 19.8, and 21.9 nM day"', respectively. Ortho bromines are preferentially removed during the debromination process. The growth of Dehalococcoides links tightly with PBDE debromination, with an estimated growth yield of 1.99 X 1014 cells per mole of bromide released, while the growth of Desulfovibrio could be independent of PBDEs. The growth-coupled debromination suggests that Dehalococcoides cells in the coculture GY2 are able to respire on PBDEs. Given the ubiquity and recalcitrance of the tetra- and penta-BDEs, complete debromination of these congeners to less toxic end products (e.g. diphenyl ether) is important for the restoration of PBDE-contaminated environments.
机译：多溴二苯醚（PBDEs）由于其广泛用作阻燃剂而成为广泛的全球污染物。在209种多溴二苯醚同类物中，四溴二苯醚（四溴联苯醚）（同类47）和五溴二苯醚（同类99和100）是环境中最丰富，毒性最大的累积同类物。但是，对微生物知之甚少在厌氧条件下对这些同类物进行脱溴。在这项研究中，我们描述了由Dehalococcoides和Desulfovibrio spp。组成的共培养物GY2，它能够将〜1180 nM同源物47,99脱溴，并平均将100（100％去除88-100％）溴化为无溴二苯醚。去除率分别为36.9、19.8和21.9 nM日。在脱溴过程中优先去除邻溴。脱卤代球菌的生长与PBDE脱溴紧密相关，每摩尔释放的溴化物估计生长速率为1.99 X 1014细胞。 ，尽管脱硫弧菌的生长可能不依赖于多溴二苯醚，但与生长耦合的脱溴作用表明，共培养GY2中的Dehalococcoides细胞能够在多溴二苯醚上产生呼吸作用。毒性较低的最终产品（例如二苯醚）的同类物对于恢复多溴二苯醚污染的环境非常重要。

著录项

  • 来源
    《Environmental Science & Technology》 |2011年第19期|p.8475-8482|共8页
  • 作者

    Lip Kim Lee; Chang Ding; Kun-Lin Yang; Jianzhong He;

  • 作者单位

    Department of Civil and Environmental Engineering;

    Department of Civil and Environmental Engineering;

    Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117576;

    Department of Civil and Environmental Engineering;

  • 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

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号