电催化氧化法处理酸性大红模拟染料废水的实验研究  

Electric catalytic oxidization treatment of Acid Red 73 in aqueous solution

作　　者：许莉[1] 尹明[1] 杨琦[1] 

机构地区：[1]天津大学化工学院,天津300072

出　　处：《现代化工》2016年第10期129-133,共5页Modern Chemical Industry

基　　金：国家自然科学基金(21276177)

摘　　要：选取酸性大红(AR73)模拟染料废水,以制得的铌掺杂二氧化钛纳米管修饰的锡锑电极为阳极,钛板为阴极,降解酸性大红染料废水,探究电流密度、初始染料浓度、初始p H、电解质类型对降解效果的影响。结果表明,催化电极主要靠产生的羟基自由基(·OH)降解有机物,为非活性电极。电流密度越大,降解效果越好,但能耗越大,最佳的电流密度为50 m A/cm^2,并且催化电极处理的废水需要在合适的浓度范围内,超过1.5 g/L时,电极开始失活。所添加的最佳电解质为Na_2SO_4,且p H对降解效果影响不大,电催化氧化降解染料废水可以在一个宽泛的p H环境下进行。Acid Red 73 in aqueous wastewater is electrochemically degraded using Ti / Sn O_2-Sb electrode modified by Nb doped Ti O_2 nanotubes as anode and Ti as cathode. The parameters affecting the efficiency of electro-catalytic oxidation degradation,such as current density,initial AR73 concentrations,electrolyte and p H,are also investigated and optimized. The results show that the electro-catalytic oxidation of AR73 on this electrode can be achieved by the formation of hydroxyl radicals and the electrode is a non-active electrode. The optimized current density is 50 m A·cm^（- 2）.When the AR73 concentrations is beyond 1. 5 g·L^（- 1）,it could not be efficiently degraded by this electrode. The optimized electrolyte is Na_2SO_4. This method could be applied in a wide range of p H values.

关 键 词：酸性大红 电催化 染料废水 环境催化 

分 类 号：TQ150.9[化学工程—电化学工业]