【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。更多还原

【Abstract】 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.更多还原