TiO_2光催化降解活性艳红X-3B的研究  

Study on the degradation of reactive brilliant red X - 3B in UV - TiO_2 system

作　　者：汤心虎[1] 谭淑英[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：《工业水处理》2004年第12期25-27,共3页Industrial Water Treatment

基　　金：广东省科技计划资助项目;编号2002C31622

摘　　要：研究了UV-TiO2体系对典型偶氮染料活性艳红X-3B模拟废水的光催化降解效果,探讨了废水pH、H2O2用量、紫外线波长、紫外线光强等因素对降解速率的影响.结果表明:(1)模拟废水的起始pH值影响活性艳红X-3B的光催化降解,在pH=3.0～5.0时效果最佳;(2)投加少量H2O2可提高活性艳红X-3B的降解速率,但用量过大时会产生抑制作用;(3)UV光强是影响反应的外在动力,在0～50μW/cm2范围内,光强越大降解速率越快;(4)UV波长对反应有重要影响,365 nm的处理效果明显优于254 nm的处理效果.Photocatalysis degradation effect of reactive brilliant red X - 3B in UV - TiO2 system is studied, and some factors, such as pH, H2O2 dosage, UV wavelength and UV intensity, which impacted photocatalysis degradation of reactive brilliant red X - 3B are discussed. The results are as follows: 1)the optimum pH is 3.0 ~ 5.0; 2)adding a little H2O2 can increase the reaction rate, but the degradation rate can decrease when the dosage of H2O2 increased too much; 3)enhancing UV intensity can increase the degradation rate; 4)the degradation effect of 365 nm UV is better than that of 254 nm.

关 键 词：光催化降解 紫外线波长 紫外线光强 活性艳红 

分 类 号：X788[环境科学与工程—环境工程]