不同波长紫外光催化降解活性艳蓝KN-R动力学研究  

Kinetic Study on Photocatalytic Degradation of Reactive Brilliant Blue KN-R by Different UV Sources

作　　者：杨俊[1,2] 刘恋[1] 曾庆福[1] 

机构地区：[1]武汉纺织大学纺织印染清洁生产教育部工程研究中心,湖北武汉430073 [2]南京大学生命科学学院,江苏南京210093

出　　处：《环境科学与技术》2011年第12期57-60,共4页Environmental Science & Technology

基　　金：国家自然科学基金项目(50978208);国家863计划项目(2009AA063904)

摘　　要：以蒽醌类染料活性艳蓝KN-R(以下简称KN-R)为对象,以TiO2为光催化剂,实验了不同波段紫外光条件下KN-R的降解过程。结果表明:365 nm和254 nm两种波段对于KN-R的光催化降解过程均符合假一级动力学方程,但是通过对比各初始浓度下活性艳红KN-R的反应速率常数(Kapp)可以发现,在相同紫外灯功率下,短波辐射下的Kapp平均为长波辐射下Kapp的3倍,说明短波紫外更有利于活性艳蓝KN-R的降解。Different wavelengths of UV light source were studied for degradation of Reactive Brilliant Blue KN-R to reveal the function of wavelengths in photocatalytic oxidation.Results showed that the degradation of Reactive Brilliant Blue KN-R followed apparent first order kinetics under both 365 nm and 254 nm ultraviolet light irradiation,but the reaction rate constant under 254 nm light source was nearly three times than that under 365 nm light source in various initial concentrations when power of the lamps were the same,which indicated that the light quantum efficiency of short wave UV was higher than that of long wave UV.

关 键 词：波长 活性艳蓝KN-R 光催化 动力学 

分 类 号：X131[环境科学与工程—环境科学]