污染土壤淋洗液中六氯苯的电化学法处理研究  

Electrochemical Treatment of Hexachlorobenzene in Effluent of Contaminated Soil Washing

作　　者：王营茹[1,2] 陆晓华[1] 林莉[1] 李泰平[1] 

机构地区：[1]华中科技大学环境科学研究所,湖北武汉430074 [2]武汉工程大学环境与城市建设学院,湖北武汉430074

出　　处：《环境科学与技术》2010年第5期21-24,共4页Environmental Science & Technology

基　　金：国家"863"重点项目课题资助(2009AA063103)

摘　　要：采用电化学稳定性较好的钛基镀RuO2为阳极,以不锈钢板为阴极,对污染土壤淋洗液中的六氯苯进行电化学处理,研究了溶液初始pH值、HCB初始浓度、电解时间、电解质浓度、外加电压等因素对六氯苯处理效果的影响。所得最佳工艺条件为:用TX-100做增溶剂时,在HCB初始浓度300μg/L、溶液初始pH为3,电解质浓度为1%,外加电压为6V时,电解3hHCB去除率为60.3%。气相色谱分析表明:阴极还原脱氯是HCB电化学降解的主要途径,检出的降解产物有五氯苯、1,2,4,5-四氯苯和1,2,3,4-四氯苯。Hexachlorobenzene（HCB）in effluent of contaminated soil washing was treated by electrochemical method,with RuO2/Ti as anode and steel electrode as cathode. Effects of initial pH,HCB concentration,electrolysis time,concentration of electrolyte and voltage on removal of HCB were investigated. Results showed that removal of HCB reached 60.3% after 3h with initial HCB concentration 300μg/L,concentration of electrolyte 1%,voltage 6V and TX-100 as solubilizing agents. Detection of degradation products including perchlorobenzene（PeCB）,1,2,4,5-tetrachlorobenzene（1,2,4,5-TetCB）and 1,2,3,4-tetrachlorobenzene （1,2,3,4-TetCB）proved that degradation mechanism is cathodic reduction dechlorination of HCB during the electrochemical process.

关 键 词：六氯苯 RuO2/Ti-钢板电极 电化学处理 阴极还原脱氯 

分 类 号：X131.3[环境科学与工程—环境科学]