TiO_2光催化降解活性艳红X-3B的动力学研究  

KINETIC STUDY ON PHOTOCATALYTIC DEGRADATION OF REACTIVE RED X-3B BY TITANIUM DIOXIDE

作　　者：汤心虎[1] 谭淑英[1] 李明玉[1] 

机构地区：[1]暨南大学理工学院环境工程系,广东广州510632

出　　处：《水处理技术》2005年第3期46-48,共3页Technology of Water Treatment

基　　金：广东省科技计划项目(2002C31622)。

摘　　要：研究了pH、TiO2投加量、H2O2用量和紫外线光强对光催化降解活性艳红X-3B动力学的影响。结果表明,TiO2光催化降解活性艳红X-3B的速率遵循准一级反应动力学方程,表观反应速率常数随溶液pH升高而下降;TiO2和H2O2的投加量均存在一个最佳值,在本实验条件下,它们分别为2.0g/L和0.2mL/50mL,低于或超过该值,都会导致反应速率下降;提高入射光强可以明显加快光催化降解速率。Kinetics of phottocatalytic degradation of Dyes was investigated at different reaction conditions using Reactive Red X-3B as a model pollutant. It was experimentally found that photocatalytic degradation of Reactive Red X-3B by titanium dioxide was one-order kinetic reaction.The apparent rate constant decreased were 0.2mL/50m and 2.0g/L respectively. The degradation rate of Reactive Red X-3B could be enhanced by increasing radiation intensity.

关 键 词：活性艳红X-3B 光催化降解 TiO2 投加量 一级反应动力学 反应速率常数 动力学研究 最佳值 入射光强 实验条件 

分 类 号：P185[天文地球—天文学] X788[环境科学与工程—环境工程]