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,365nm的处理效果明显优于254nm的处理效果。

关键词: 光催化降解, 紫外线波长, 紫外线光强, 活性艳红

Abstract:

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.

Key words: photocatalysis degradation, ultra violet wavelength, ultra violet ntensity, reactive brilliant red

中图分类号: 

• X788