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首页> 外文期刊>Journal of Hazardous Materials >Reductive dechlorination of hexachlorobenzene by Cu/Fe bimetal in the presence of nonionic surfactant
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Reductive dechlorination of hexachlorobenzene by Cu/Fe bimetal in the presence of nonionic surfactant

机译：非离子表面活性剂存在下铜/铁双金属对六氯苯的还原脱氯

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摘要

This study investigated the enhancement of nonionic surfactant (TritonX-100, TX-100) on the reductive dechlorination of hexachlorobenzene (HCB) by microscale Cu/Fe bimetal. HCB reduction by Cu/Fe without TX-100, in aqueous TX-100, adsorbed with TX-100 and prepared with TX-100 was compared. Results showed that HCB reduction by Cu/Fe in aqueous TX-100 increased with increasing TX-100 concentration, reached a maximum of 98.6% when aqueous TX-100 concentration attained its critical micelle concentration (CMC), and decreased with the further increase in TX-100 concentration. The mechanism was suggested as the increased HCB mass transport at low TX-100 concentration below CMC and the coverage of reactive sites at high TX-100 concentration above CMC. The greatest reduction was achieved by Cu/Fe in the presence of 0.2 mM TX-100, followed by Cu/Fe adsorbed and prepared with 0.2 mM TX-100. Pentachlorobenzene and tetrachlorobenzene were found as the main dechlorination intermediates. Successive reduction by Cu/Fe in aqueous TX-100 solution could be maintained above 98% for four cycles. It is an alternative to use nonionic surfactants to enhance the reductive dechlorination of hydrophobic polychlorinated aromatic hydrocarbons (PCAH) by Cu/Fe bimetal.
机译：这项研究研究了非离子表面活性剂（TritonX-100，TX-100）在微量Cu / Fe双金属对六氯苯（HCB）还原脱氯中的增强作用。比较了在没有TX-100的情况下，在TX-100水溶液中，被TX-100吸附并由TX-100制备的Cu / Fe对HCB的还原。结果表明，TX-100水溶液中Cu / Fe还原HCB随TX-100浓度的增加而增加，当TX-100水溶液达到其临界胶束浓度（CMC）时，HCB的最大还原量达到98.6％，随着TX-100浓度的增加而降低。 TX-100浓度。提示该机制是由于在低于CMC的低TX-100浓度下HCB物质运输增加以及在高于CMC的高TX-100浓度下反应位点的覆盖。在存在0.2 mM TX-100的情况下，通过Cu / Fe实现最大的还原，然后用0.2 mM TX-100吸附并制备Cu / Fe。发现五氯苯和四氯苯是主要的脱氯中间体。在四个循环中，TX-100水溶液中Cu / Fe的连续还原可以保持在98％以上。另一种选择是使用非离子表面活性剂来增强铜/铁双金属对疏水性多氯芳烃（PCAH）的还原脱氯作用。

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  • 来源
    《Journal of Hazardous Materials》 |2009年第3期|895-901|共7页
  • 作者

    Zhonghua Zheng; Songhu Yuan; Yang Liu; Xiaohua Lu; Jinzhong Wan; Xiaohui Wu; Jing Chen;

  • 作者单位

    Environmental Science Research Institute, Huazhong University of Science and Technology, Wuhan 430074, PR China;

    Environmental Science Research Institute, Huazhong University of Science and Technology, Wuhan 430074, PR China State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;

    Environmental Science Research Institute, Huazhong University of Science and Technology, Wuhan 430074, PR China;

    Environmental Science Research Institute, Huazhong University of Science and Technology, Wuhan 430074, PR China;

    Environmental Science Research Institute, Huazhong University of Science and Technology, Wuhan 430074, PR China;

    Environmental Science Research Institute, Huazhong University of Science and Technology, Wuhan 430074, PR China;

    Environmental Science Research Institute, Huazhong University of Science and Technology, Wuhan 430074, PR 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
  • 关键词

    zero-valent iron; hexachlorobenzene; dechlorination; surfactants;

    机译：零价铁六氯苯脱氯表面活性剂;

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