二氧化氯催化氧化H酸废水

采用浸渍法制备Ni-Zn/γ-Al₂O₃催化剂，用于二氧化氯催化氧化处理染料中间体H酸废水，研究废水初始pH、二氧化氯加入量、催化剂用量、反应时间和催化剂重复使用等因素对H酸废水TOC去除率的影响。最佳实验条件为：pH为中性偏碱性范围，V(二氧化氯)∶V(废水)＝0.20，Ni-Zn/γ-Al₂O₃催化剂的加入量为20 g·L^－1，反应时间60 min，Ni-Zn/γ-Al₂O₃催化剂能连续使用7次而保持稳定的催化活性，对H酸废水的TOC去除率为75.94%，与单独化学氧化效果相比，TOC去除率提高了191%。

Catalytic oxidative treatment of wastewater containing H acid with chlorine dioxide

Ni-Zn/γ-Al2O3 catalyst was prepared by impregnation and tested for catalytic oxidative treatment of H acid wastewater by chlorine dioxide. Effects of initial pH, quantity of chlorine dioxide, dosage of the catalyst, reaction time and repeated use of the catalyst on TOC removal rate for H acid wastewater were investigated. The optimal condition was obtained as follows： pH of neutral or slightly alkaline, V（ ClO2 ） ： V （wastewater） =0.20, Ni-Zn/γ-Al2O3 catalyst dosage of 20 g · L^-1 , reaction time 60 rain. Ni-Zn/γ-Al2O3 catalyst could be repeatedly used for seven times with stable catalytic activity and TOC removal rate of 75. 94%. TOC removal rate was enhanced by 191% compared with non-catalytic chlorine dioxide oxidation.