A kinetic model of Ti(IV)-catalyzed H_2O_2/O_3 process in aqueous solution  

作　　者：Shaoping Tong Shuqin Zhao Xiaofei Lan Chunan Ma 

机构地区：[1]College of Chemical Engineering and Materials Science, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310032, China

出　　处：《Journal of Environmental Sciences》2011年第12期2087-2092,共6页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 50578146, 20876151,21176225);the Natural Science Foundation of Zhejiang Province, China (No. Y5080178)

摘　　要：To well describe the Ti（IV）-catalyzed H2O2/O3 reaction in aqueous solution, a kinetic model was established based on its mechanism. This model was then validated by the experiments of acetic acid degradation in aqueous solution. It was found that the correlation coefficient of fittings was higher than 0.970. Three key operating factors affecting organic degradation in the Ti（IV）-catalyzed H2O2/O3 process were studied, including Ti（IV） concentration, dissolved ozone concentration and initial H2O2 concentration. Furthermore, some experiments were conducted to determine the rate constant for dissolved ozone decomposition initiated by Ti2O52＋. The rate constant measured is almost in accord with the data analyzed by this kinetic model. The goodness of fittings demonstrated that this model could well describe the kinetics of the Ti（IV）-catalyzed H2O2/O3 reaction mathematically and chemically. Therefore, this kinetic model can provide some useful information to optimize the parameters in ozonation of water containing certain pollutants.To well describe the Ti（IV）-catalyzed H2O2/O3 reaction in aqueous solution, a kinetic model was established based on its mechanism. This model was then validated by the experiments of acetic acid degradation in aqueous solution. It was found that the correlation coefficient of fittings was higher than 0.970. Three key operating factors affecting organic degradation in the Ti（IV）-catalyzed H2O2/O3 process were studied, including Ti（IV） concentration, dissolved ozone concentration and initial H2O2 concentration. Furthermore, some experiments were conducted to determine the rate constant for dissolved ozone decomposition initiated by Ti2O52＋. The rate constant measured is almost in accord with the data analyzed by this kinetic model. The goodness of fittings demonstrated that this model could well describe the kinetics of the Ti（IV）-catalyzed H2O2/O3 reaction mathematically and chemically. Therefore, this kinetic model can provide some useful information to optimize the parameters in ozonation of water containing certain pollutants.

关 键 词：OZONE hydrogen peroxide Ti（IV） kinetic model acetic acid degradation 

分 类 号：O647.2[理学—物理化学] TP242[理学—化学]