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首页> 外文期刊>Environmental Science & Technology >Dehalococcoides ethenogenes Strain 195 Reductively Dechlorinates Diverse Chlorinated Aromatic Pollutants
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Dehalococcoides ethenogenes Strain 195 Reductively Dechlorinates Diverse Chlorinated Aromatic Pollutants

机译：Dehalococcoides ethenogenes菌株195还原性脱氯以分离多种氯化的芳香族污染物

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Dehalococcoides ethenogenes strain 195 dechlorinates tetrachloroethene to vinyl chloride and ethene, and its genome has been found to contain up to 17 putative dehalogenase gene homologues, suggesting diverse dehalogenation ability. We amended pure or mixed cultures containing D. ethenogenes strain 195 with 1,2,3,4-tetrachlorodibenzo-p-dioxin, 2,3,7,8-tetrachlorodibenzo-p-dioxin, 2,3-dichlorodibenzo-p-dioxin, 1,2,3,4-tetrachioro-dibenzofuran, 2,3,4,5,6-pentachlorobiphenyl, 1,2,3,4-tetrachloronaphthaiene, various chlorobenzenes, or a mixture of 2-, 3-, and 4-chlorophenol to determine the dehalogenation ability. D. ethenogenes strain 195 dechlorinated 1,2,3,4-tetrachlorodibenzo-p-dioxin to a mixture of 1,2,4-trichlorodibenzo-p-dioxin and 1,3-dichlorodibenzo-p-dioxin. 2,3,4,5,6- Pentachlorobiphenyl was dechlorinated to 2,3,4,6- and/or 2,3,5,6-tetrachlorobiphenyl and 2,4,6-trichlorobiphenyl. 1,2,3,4-Tetrachloronaphthalene was dechlorinated primarily to an unidentified dichloro-naphthalene congener. The predominant end products from hexachlorobenzene dechlorination were 1,2,3,5-tetrachloro-benzene and 1,3,5-trichlorobenzene. We did not detect dechlorination daughter products from monochlorophenols, 2,3-dichlorodibenzo-p-dioxin or 2,3,7,8- tetrachlorodibenzo-p-dioxin. D. ethenogenes strain 195 has the ability to dechlorinate many different types of chlorinated aromatic compounds, in addition to its known chloroethene respiratory electron acceptors. Remediation of sediments contaminated with aromatic halogenated organic pollutants such as polychlorinated biphenyls and polychlorinated dibenzo-p-dioxins could require billions of dollars in the coming years. Harnessing microorganisms such as Dehalococcoides spp. that detoxify these compounds via removal of halogens may lead to cost-effective biotechnological approaches for remediation.
机译：Dehalococcoides ethenogenes菌株195将四氯乙烯脱氯为氯乙烯和乙烯，并且发现其基因组包含多达17个推定的脱卤酶基因同源物，表明具有多种脱卤能力。我们修改了含有1,2,3,4-四氯二苯并-p-二恶英，2,3,7,8-四氯二苯并-p-二恶英，2,3-二氯二苯并-p-二恶英的D. ethenogenes菌株195的纯或混合培养物，1,2,3,4-四氯二苯并呋喃，2,3,4,5,6-五氯联苯，1,2,3,4-四氯萘，各种氯苯或2-，3-和4的混合物用-氯酚测定脱卤能力。 D. ethenogenes菌株195将1,2,3,4-四氯二苯并-对-二恶英脱氯为1,2,4-三氯二苯并-对-二恶英和1,3-二氯二苯并-对-二恶英的混合物。将2,3,4,5,6-五氯联苯脱氯为2,3,4,6-和/或2,3,5,6-四氯联苯和2,4,6-三氯联苯。 1,2,3,4-四氯萘主要被脱氯至一个未知的二氯萘同类物。六氯苯脱氯的主要最终产物是1,2,3,5-四氯苯和1,3,5-三氯苯。我们未检测到一氯酚，2,3-二氯二苯并-对-二恶英或2,3,7,8-四氯二苯并-对-二恶英的脱氯子产物。除其已知的氯乙烯呼吸电子受体外，埃德森梭菌菌株195还具有对许多不同类型的氯化芳族化合物进行脱氯的能力。在未来几年中，对被芳香族卤代有机污染物（如多氯联苯和多氯二苯并对二恶英）污染的沉积物进行补救可能需要数十亿美元。利用微生物如Dehalococcoides spp。通过去除卤素来对这些化合物进行解毒的方法可能会导致具有成本效益的生物技术修复方法。

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