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氯代烃在铜电极上的电还原特性和pH值的影响

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徐文英, 高廷耀, 周荣丰, 马鲁铭. 氯代烃在铜电极上的电还原特性和pH值的影响[J]. 环境化学, 2005, 24(3): 318-321.
引用本文: 徐文英, 高廷耀, 周荣丰, 马鲁铭. 氯代烃在铜电极上的电还原特性和pH值的影响[J]. 环境化学, 2005, 24(3): 318-321.
shu
XU Wen-ying, GAO Ting-yao, ZHOU Rong-feng, MA Lu-ming. THE ELECTROCHEMICAL REDUCTION CHARACTERISTICS OF CHLORINATED HYDROCARBONS AT THE COPPER ELECTRODE AND THE INFLUENCE OF pH[J]. Environmental Chemistry, 2005, 24(3): 318-321.
Citation: XU Wen-ying, GAO Ting-yao, ZHOU Rong-feng, MA Lu-ming. THE ELECTROCHEMICAL REDUCTION CHARACTERISTICS OF CHLORINATED HYDROCARBONS AT THE COPPER ELECTRODE AND THE INFLUENCE OF pH[J]. Environmental Chemistry, 2005, 24(3): 318-321.
shu

氯代烃在铜电极上的电还原特性和pH值的影响

  • 1.

    同济大学城市污染控制国家工程研究中心, 上海, 200092

  • 基金项目:

    国家高新技术研究发展计划(863计划)资助项目(202AA601270)

THE ELECTROCHEMICAL REDUCTION CHARACTERISTICS OF CHLORINATED HYDROCARBONS AT THE COPPER ELECTRODE AND THE INFLUENCE OF pH

  • 1.

    The National Engineering Research Center for Urban Pollution Control, Tongji University, Shanghai, 200092

  • Fund Project:

  • 摘要: 采用循环伏安法,对氯代烃类化合物在铜电极表面上的电还原特性进行了研究,结果表明,氯代烷烃类化合物能在铜电极表面被直接还原,氯代芳烃不易在铜电极上被直接还原.碱性条件有利于中间体碳负离子的形成;在酸性条件下,碳负离子与氢离子之间反应的几率增大,导致通过溶液的电流值增加.pH值对不同氯代烃在铜电极上的电还原特性有不同程度的影响,这主要取决于碳链(或苯环)上其它取代基的性质、结构、数量和它与氯在苯环上的相对位置.
    Abstract: The electrochemical reduction characteristics of chlorinated hydrocarbon at the copper electrodes were investigated by using cyclic voltammetry technique.The experimental results showed that chlorinated paraffin hydrocarbons could be reduced directly at the copper electrode,and chlorinated aromatic hydrocarbons were not as easily reduced directly at the copper electrode. Both acidity and basicity favor dechlorination of chlorinated hydrocarbons at the copper electrode: the intermediate product——carbanions are easier to form in the alkaline medium; in the acidic medium the probability of the reaction between carbanions and hydrogen ions raises, which causes magnification of the current through the solution. pH strongly influenced the (electrochemical) reduction characteristics of the chlorinated hydrocarbons at the copper electrode, furthermore, the influence mainly depends on the properties of the substituents in carbochain (or benzene ring), their configurations and numbers, and their location versus chlorine in the benzene ring.
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  • [1] 李荻主编,电化学原理.北京:北京航空航天大学出版社, 1999,364-367
    [2] 俞凌静主编. 基础理论有机化学.北京:人民教育出版社,1980,181-192, 463-466, 477-479
    [3] 梁世懿,成本诚,高等有机化学--结构·反应·合成.北京:高等教育出版社, 1993,102-105,113-119
    [4] Li T,Farrell J,Electrochemical Investigation of the Rate-Limiting Mechanisms for Trichloroethylene and Carbon Tetrachloride Reduction at Iron Surface.Environ. Sci. Technol., 2001,35:3560-3565
    [5] 徐寿昌主编,有机化学.北京:高等教育出版社, 1993,254-256,365-367

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  • 收稿日期:  2004-06-25
徐文英, 高廷耀, 周荣丰, 马鲁铭. 氯代烃在铜电极上的电还原特性和pH值的影响[J]. 环境化学, 2005, 24(3): 318-321.
引用本文: 徐文英, 高廷耀, 周荣丰, 马鲁铭. 氯代烃在铜电极上的电还原特性和pH值的影响[J]. 环境化学, 2005, 24(3): 318-321.
shu
XU Wen-ying, GAO Ting-yao, ZHOU Rong-feng, MA Lu-ming. THE ELECTROCHEMICAL REDUCTION CHARACTERISTICS OF CHLORINATED HYDROCARBONS AT THE COPPER ELECTRODE AND THE INFLUENCE OF pH[J]. Environmental Chemistry, 2005, 24(3): 318-321.
Citation: XU Wen-ying, GAO Ting-yao, ZHOU Rong-feng, MA Lu-ming. THE ELECTROCHEMICAL REDUCTION CHARACTERISTICS OF CHLORINATED HYDROCARBONS AT THE COPPER ELECTRODE AND THE INFLUENCE OF pH[J]. Environmental Chemistry, 2005, 24(3): 318-321.
shu

氯代烃在铜电极上的电还原特性和pH值的影响

  • 1. 同济大学城市污染控制国家工程研究中心, 上海, 200092
  • 收稿日期:  2004-06-25
基金项目:

国家高新技术研究发展计划(863计划)资助项目(202AA601270)

摘要: 采用循环伏安法,对氯代烃类化合物在铜电极表面上的电还原特性进行了研究,结果表明,氯代烷烃类化合物能在铜电极表面被直接还原,氯代芳烃不易在铜电极上被直接还原.碱性条件有利于中间体碳负离子的形成;在酸性条件下,碳负离子与氢离子之间反应的几率增大,导致通过溶液的电流值增加.pH值对不同氯代烃在铜电极上的电还原特性有不同程度的影响,这主要取决于碳链(或苯环)上其它取代基的性质、结构、数量和它与氯在苯环上的相对位置.

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