A kinetic model of Ti（IV）-catalyzed H2O2/O3 process in aqueous solution

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 th...

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Bibliographic Details
Published in:环境科学学报：英文版 2011, Vol.23 (12), p.2087-2092
Main Author: Shaoping Tong Shuqin Zhao Xiaofei Lan Chunan Ma
Format: Article
Language:English
Subjects:
催化
分解速率常数
动力学模型
反应动力学
有机物降解
水溶液
臭氧浓度
钛（Ⅳ）
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Summary: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.
ISSN:1001-0742
1878-7320