增溶剂对Pd/ACF电极电还原水相中的2,4,5-PCB脱氯的影响  

THE EFFECTS OF SOLUBILIZERS ON 2,4,5-PCB ELECTROREDUCTIVE DECHLORINATION BY Pd MODIFIED ACF ELECTROD IN AQUEOUS PHASE

作　　者：帅丹蒙[1] 杨波[1] 余刚[1] 

机构地区：[1]清华大学环境科学与工程系持久性有机污染物研究中心,北京100084

出　　处：《环境化学》2007年第4期457-460,共4页Environmental Chemistry

基　　金：高校博士点专项研究基金(20040003042)资助课题

摘　　要：研究了Pd修饰活性炭毡(ACF)电极在不同增溶剂中(2,4,5-PCB)电催化还原脱氯效果,结果表明,以四烷基铵盐作为增溶剂时,2,4,5-PCB脱氯效率大体随着增溶剂疏水基团的增大而提高·在增溶能力强的阳离子表面活性剂和非离子表面活性剂溶液中,2,4,5-PCB的脱氯效果均较好·羟丙基-β-环糊精(HPCD)无毒无害易降解,且其溶液中2,4,5-PCB反应条件低,脱氯效果好,是较优的增溶剂·The research studied the effects of different solubilizers on 2,4,5-PCB electroreductive dechlorination by Pd modified active carbon felt （ ACF）, and investigated the mechanism of influence on dechlorination effect by cationic surfactants. The results demonstrate that dechlorination efficiency of 2,4,5-PCB rises with the bulk of hydrophobic radicals when using cationic surfactants as solubilizers, which have isometric carbon chains. The dechlorination efficiency is fairly high in the solution with high-solubilization-capacity cationic and nonionic surfactants. Hydropropyl-β-cyclodextrin （HPCD） is nontoxic, innocuous and readily degradable while dechlorination of 2,4,5-PCB is easy and efficacious in its solution; thus HPCD is a preferable solubilizer.

关 键 词：多氯联苯 电还原脱氯 羟丙基-β-环糊精. 

分 类 号：X132[环境科学与工程—环境科学]