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首页> 外文期刊>Environmental Science & Technology >Kinetics of the Reduction of Hexachloroethane by Juglone in Solutions Containing Hydrogen Sulfide
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Kinetics of the Reduction of Hexachloroethane by Juglone in Solutions Containing Hydrogen Sulfide

机译：乙二醛在硫化氢溶液中还原六氯乙烷的动力学

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Hexachloroethane was converted to tetrachloroeth-ene and unknown products in solutions containing Juglone and hydrogen sulfide. Measured rates of disappearance in solutions containing hydrogen sulfide alone were approximately a factor of 10 slower than rates containing micromolar concentrations of juglone and hydrogen sulfide. Electrochemically-reduced juglone was unreactive with respect to hexachloroethane reduction. Reaction of hexachloro-ethane with polysulfides produced in the reaction of elemental sulfur with hydrogen sulfide in the experimental solutions also could not account for the rate observed in solutions containing juglone and hydrogen sulfide. Evidence is provided to indicate the reaction of hexachloroethane with the Michael addition product of hydrogen sulfide and juglone. No conclusions can be drawn from the present results as to whether the reaction mechanism is a one- or a two-electron transfer. This study points out the importance of the geochemistry of sulfur and organic matter in the transformation of halogenated alkane pollutants in reducing environments.
机译：在含有朱古隆和硫化氢的溶液中，六氯乙烷被转化为四氯乙烯和未知产物。单独含有硫化氢的溶液中测得的消失速率比含有微摩尔浓度的胡胶和硫化氢的速率约慢10倍。电化学还原的朱古力对六氯乙烷还原反应不活跃。在实验溶液中六氯乙烷与元素硫与硫化氢反应中生成的多硫化物的反应也不能解释在含ju酒酮和硫化氢的溶液中观察到的速率。提供了证据表明六氯乙烷与硫化氢和胡胶的迈克尔加成产物的反应。从目前的结果不能得出关于反应机理是单电子转移还是两电子转移的结论。这项研究指出了硫和有机物的地球化学在还原性环境中对卤代烷烃污染物转化的重要性。

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