摘要：

采用TiO₂/浮石悬浮态光催化剂，对活性艳红X-3B模拟废水进行了光催化降解的中试研究。考察了催化剂投加量、曝气量、溶液pH、投加助剂H₂O₂、污染物初始浓度对光催化效率的影响。结果表明，TiO₂/浮石在中试条件下对活性艳红X-3B有较好的降解效果；催化剂最佳投加质量浓度为45g/L，增大曝气量和pH，适当投加助剂H₂O₂有利于光催化降解效率的提高；活性艳红X-3B的光催化降解过程符合负一级反应动力学规律，反应速率常数与活性艳红X-3B模拟废水初始浓度之间具有近似负一级的动力学关系。

关键词: TiO₂, 浮石, 光催化, 活性艳红X-3B

Abstract:

The photocatalytic degradation of active bright red X-3B in pilot scale has been investigated by using TiO₂/pumice. The effects of the concentration of TiO₂/pumice, aeration rate, pH, the addition of H₂O₂ and the initial concentration of active bright red X-3B on the treatment efficiency of active bright red X-3B have been studied. The results indicate that TiO₂/pumice had high photocatalytic effect on the degradation of active bright red X-3B. The optimal concentration of TiO₂/pumice is about 45 g/L. The increases of aeration volume, pH and dosage of H₂O₂ are favorable to the photocatalytic degradation of active bright red X-3B. It is observed that the photocatalytic degradation of active bright red X-3B is conformed to negative first order reaction kinetics, and the apparent kinetic reaction rate constant and the initial active bright red X-3B concentration could be described by nearly negative first order kinetics.

Key words: TiO₂, pumice, photocatalysis, active bright red X-3B

中图分类号: 

• X703.1

• X788