CAJ | 학술논문

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3h HCB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.
채용전화학은정성교호적태기도RuO2위양겁,이불수강판위음겁,대오염토양림세액중적륙록분진행전화학처리.연구료용액초시pH치、HCB초시농도、전해시간、전해질농도、외가전압등인소대륙록분처리효과적영향.소득최가공예조건위:용TX-100주증용제시,재HCB초시농도300μg/L、용액초시pH위3,전해질농도위1%,외가전압위6V시,전해3h HCB거제솔위60.3%.기상색보분석표명:음겁환원탈록시HCB전화학강해적주요도경,검출적강해산물유오록분、1,2,4,5-사록분화1,2,3,4-사록분.
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.