臭氧催化氧化机理及其技术研究进展

A review of catalytic ozonation:Mechanisms and efficiency

臭氧催化氧化技术可以提高污水中总有机碳(TOC)的去除效率和臭氧的利用率,近年来得到了广泛的研究。但由于催化反应过程复杂、影响因素多,导致其反应机理一直存在较大的争议。本文回顾了近年来国内外对臭氧催化氧化技术的研究结果,对均相、非均相臭氧催化氧化机理以及非均相催化剂的组成、活性影响因素进行了总结,并对非均相臭氧催化氧化技术用于降解模型化合物和处理典型工业污水的研究进展进行了介绍。文章最后指出催化剂的结构和表面化学性质与催化机理、有机物的降解途径之间的相互关系还需要更深入的研究。

Interest in the use of catalytic ozonation has been steadily increasing as an effective process for total mineralization of organic contaminants and lower usage of ozone when compared with ozonation alone. Unfortunately, the mechanisms are always disputed due to the intricacy of crucial parameters and complexity of catalytic reactions during oxidation of organic molecules in aqueous solution. This paper presents a review of recent advances in catalytic ozonation to propose general ideas about mechanisms governing homogeneous and heterogeneous catalytic ozonation reactions. Heterogeneous catalyst compositions, factors affecting catalytic activity are summarized and advances in heterogeneous catalytic ozonation for degradation of model compounds and treatment of typical industrial wastewater are highlighted. The future work could focus on the relationship among catalyst, mechanism and degradation pathway of organic pollutants.