• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Kinetics and Inhibition of Reductive Dechlorination of Trichloroethene, cis-1,2-Dichloroethene and Vinyl Chloride in a Continuously Fed Anaerobic Biofilm Reactor
【24h】

Kinetics and Inhibition of Reductive Dechlorination of Trichloroethene, cis-1,2-Dichloroethene and Vinyl Chloride in a Continuously Fed Anaerobic Biofilm Reactor

机译：连续进料厌氧生物膜反应器中三氯乙烯，顺式1,2-二氯乙烯和氯乙烯还原脱氯的动力学和抑制作用

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

Anaerobic bioreactors containing Dehalococcoides spp. can be effective for the treatment of trichloroethene (TCE) contamination. However, reductive dehalogenation of TCE often results in partial conversion to harmless ethene, and significant production of undesired cis- 1,2-dichloroethene (cis-DCE) and vinyl chloride (VC) is frequently observed. Here, a detailed modeling study was conducted focusing on the determination of biokinetic constants for the dechlorination of TCE and its reductive dechlorination intermediates cis-DCE and VC as well as any biokinetic inhibition that may exist between these compounds. Dechlorination data from an anaerobic biotrickling filter containing Dehalococcoides spp. fed with single compounds (TCE, cis-DCE, or VC) were fitted to the model to determine biokinetic constants. Experiments with multiple compounds were used to determine inhibition between the compounds. It was found that the Michaelis-Menten half-saturation constants for all compounds were higher than for cells grown in suspended cultures, indicating a lower enzyme affinity in biofilm cells. It was also observed that TCE competitively inhibited the dechlorination of cis-DCE and had a mild detrimental effect on the dechlorination of VC. Thus, careful selection of biotreatment conditions, possibly with the help of a model such as the one presented herein, is required to minimize the production of partially dechlorinated intermediates.
机译：含有Dehalococcoides spp的厌氧生物反应器。可以有效地处理三氯乙烯（TCE）污染。然而，TCE的还原性脱卤经常导致部分转化为无害的乙烯，并且经常观察到大量产生不希望的顺式1,2-二氯乙烯（cis-DCE）和氯乙烯（VC）。在这里，进行了详细的建模研究，重点是确定TCE及其还原性脱氯中间体顺式DCE和VC的脱氯生物动力学常数，以及这些化合物之间可能存在的任何生物动力学抑制作用。来自包含Dehalococcoides spp的厌氧生物滴滤池的脱氯数据。用单一化合物（TCE，顺式DCE或VC）喂食的模型适合模型，以确定生物动力学常数。使用多种化合物的实验来确定化合物之间的抑制作用。发现所有化合物的Michaelis-Menten半饱和常数均高于悬浮培养物中生长的细胞，这表明生物膜细胞中的酶亲和力较低。还观察到，TCE竞争性抑制顺式-DCE的脱氯，并且对VC的脱氯具有温和的有害作用。因此，需要仔细选择生物处理条件，可能需要借助一种模型，如本文所述的模型，以最小化部分脱氯中间体的产生。

著录项

  • 来源
    《Environmental Science & Technology》 |2011年第4期|p.1569-1578|共10页
  • 作者

    Sudeep C. Popat; Marc A.Deshusses;

  • 作者单位

    Department of Chemical and Environmental Engineering, University of California, Riverside, California 92521, United States,Department of Civil and Environmental Engineering, Duke University, Durham, North Carolina 27708, United States,Center for Environmental Biotechnology,Biodesign Institute, Arizona State University, Tempe, Arizona 85287, United States;

    Department of Civil and Environmental Engineering, Duke University, Durham, North Carolina 27708, United States;

  • 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