光氧化与光催化氧化降解酸性玫瑰红B的动力学比较  

KINETIC COMPARISON OF ACID RED 52 DEGRADATION BY PHOTO-OXIDATION AND PHOTOCATALYTIC OXIDATION

作　　者：傅剑锋[1] 季民[1] 杨勇[2] 金洛楠[1] 杨虹[1] 

机构地区：[1]天津大学环境科学与工程学院,天津300072 [2]天津市滨海市政建设发展有限公司,天津300050

出　　处：《水处理技术》2005年第7期35-37,共3页Technology of Water Treatment

摘　　要：本文主要通过对TiO2光催化剂对酸性玫瑰红B(AcidRed52)降解的研究,比较了在光氧化和光催化氧化两种作用下AR52降解的动力学参数,试验结果证明两种氧化系统均符合伪一级反应动力学方程。通过比较两种氧化系统的动力学速率平衡常数可知在催化剂TiO2存在反应系统中时,AR52的光降解速率要比直接光氧化效率高得多。文中最后对光催化氧化反应体系进行了动力学分析,得到AR52的吸附平衡常数为0.2788L/mg;二级速率常数为0.45mg/L·min。Kinetic constants of AR52 degradation photo oxidation and by photocatalytic oxidation were compared through studying degradation of AR52 in the presence of TiO2. Experimental results indicated that the kinetics for both oxidation systems conformed well a pseudo-first-order kinetic model. A comparison between the different kinetic constant in two systems revealed that constants were much higher in the presence of TiO2 than those obtained in the absence of TiO2. The kinetic analysis of photocatalytic oxidation system showed that the adsorption equilibrium constant and the second order kinetic rate constant were 0.2788L/mg, 0.45 mg/L·min respectively.

关 键 词：光氧化 光催化氧化 酸性玫瑰红B TIO2 

分 类 号：X703.1[环境科学与工程—环境工程]