Abstract: The degradation process of orange G has been researched,using the electric Fenton system which consisted of polytetrafluoroethylene(PTFE)-carbon black(CB) modified graphite felt(GF) as cathode,platinum plate as anode,and 500 mL 0.05 mol/L of Na₂SO₄ solution as electrolyte. The characteristics of three kinds of catalyst supporting materials(diatomaceous,kaolin and bentonite),are investigated. The catalysts have been prepared by surface growing Fe₃O₄ method. The result from the degradation of 20 mg/L of organic G shows that Fe₃O₄-bentonite is con-firmed to be the best catalyst. Under the effect of optimal catalyst,when pH is 3,current density 50 A/m²,catalyst dosage 1.0 g/L,and conduction time 40 min,the removing rate of orange G by the electro-Fenton system reaches 95.34%.

Key words: electric Fenton, heterogeneous catalyst, orange G

摘要： 采用聚四氟乙烯（PTFE）-炭黑（CB）修饰的石墨毡（GF）为阴极，铂片为阳极，500 mL 0.05 mol/L的Na₂SO₄溶液为电解液组成的电Fenton体系降解橙黄G。考察了3种催化剂支撑材料（硅藻土、高岭土和膨润土）的特性，并利用表面生长Fe₃O₄法制备了催化剂。对20 mg/L橙黄G的降解结果表明，Fe₃O₄-膨润土为最佳催化剂；在最佳催化剂作用下，当pH为3，电流密度为50 A/m²，催化剂投加量为1.0 g/L，通电时间为40 min时，电Fenton体系对橙黄G的去除率达到95.34%。

关键词: 电Fenton, 非均相催化剂, 橙黄G

CLC Number: 

• X703