新型电化学体系对4-氯苯酚的降解  

Degradation of 4-chlorophenol in a new electrochemical oxidation system

作　　者：温青 胡宝瑞 殷金玲 

机构地区：[1]哈尔滨工程大学环境工程系,黑龙江哈尔滨150001

出　　处：《中国环境科学》2008年第9期851-855,共5页China Environmental Science

摘　　要：实验构建了4种电化学反应体系,考察了各体系降解4-氯苯酚的效果.结果表明,以Sb-SnO2/Ti和Fe板为双阳极、多壁碳纳米管气体电极为阴极构建的新型电催化-电Fenton-电絮凝复合反应体系中,4-氯苯酚的去除率最高.通过正交实验确定了该体系各主要参数对4-氯苯酚去除率的影响程度由大到小依次为初始浓度>曝气量>pH值>电流密度.在阳极电流密度为20mA/cm2、曝气量为1.3L/min、pH值为3的条件下,初始浓度100mg/L的4-氯苯酚在电解10min时的去除率为96%.Degradation of 4-chlorophenol by four electrochemical reaction systems was investigated. The removal efficiency of 4-chlorophenol in water by electrocatalysis---electro-Fenton--peroxi-coagulation synergetic processes was biggest in a new electrocatalytic reaction system , which used multiple-walled carbon nanotubes （MWNT） gas diffusion electrode as cathode and Sb-SnO2/Ti and Fe as double anodes. According to the orthogonal test, the sequence of main parameters affecting the removal efficiency of 4-chlorophenol in this new system was initial concentration〉aeration rate〉pH〉current density. The removal efficiency of 4-chlorophenol with 100 mg/L initial concentration reached 96% after electrolysis of 10 min at current density of 20mA/cm^2, aeration rate of 1.3L/min and pH 3.

关 键 词：4-氯苯酚 电催化氧化 气体电极 Sb-SnO2/Ti电极 

分 类 号：X131[环境科学与工程—环境科学]