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Transformations of 1,1,2,2-Tetra chloroethane under Methanogenic Conditions

机译:产甲烷条件下1,1,2,2-四氯乙烷的转化

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摘要

Abiotic and biotic transformations of 1,1,2,2-tetra-chloroethane (TeCA) under methanogenic conditions were studied. TeCA degradation started without lag with municipal digester sludge. 1,1,2-Trichloroethane (1,1,2-TCA), trans-1,2-dichloroethene (tDCE), and cis-1,2-dichloroethene (cDCE) were products of biotic transformation, while trichloroethene (TCE) resulted from abiotic degradation. TCE was further transformed to cDCE, vinyl chloride (VC), and ethene. Ethene, VC, and tDCE were the persistent products of TeCA transformations. With the same municipal digester sludge culture, 1,1,2-TCA was removed and converted to 1,2-dichloroethane (1,2-DCA) and VC. 1,2-DCA partially degraded, resulting in chloroethane and ethene formation. Reductive dechlorination, dichloroelimination, and dehydrochlorination simultaneously took place during the degradation of TeCA. Dichloroelimination and dehydrochlorination played important roles in the removal of TeCA and 1,1,2-TCA under methanogenic conditions.
机译:研究了在产甲烷条件下1,1,2,2-四氯乙烷(TeCA)的非生物和生物转化。 TeCA的降解开始没有市政消化池污泥的滞后。 1,1,2-三氯乙烷(1,1,2-TCA),反式1,2-二氯乙烯(tDCE)和顺式1,2-二氯乙烯(cDCE)是生物转化的产物,而三氯乙烯(TCE)非生物降解所致。 TCE进一步转化为cDCE,氯乙烯(VC)和乙烯。乙烯,VC和tDCE是TeCA转换的持久产物。使用相同的市政消化池污泥培养物,将1,1,2-TCA去除并转化为1,2-二氯乙烷(1,2-DCA)和VC。 1,2-DCA部分降解,导致形成氯乙烷和乙烯。在TeCA降解过程中,还原性脱氯,二氯消除和脱氯化氢同时进行。在产甲烷条件下,二氯消除和脱氯化氢在去除TeCA和1,1,2-TCA中起着重要作用。

著录项

  • 来源
    《Environmental Science & Technology》 |1996年第2期|p.542-547|共6页
  • 作者单位

    Department of Environmental Engineering, Xiangtan University, Xiangtan City, Hunan Province 411105, People's Republic of China;

  • 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 环境化学;
  • 关键词

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