污水深度处理中常见固相臭氧催化剂及其催化机理综述

Overview of Common Solid-Phase Ozone Catalysts and Catalytic Mechanism in Wastewater Advanced Treatment

近年来,催化臭氧氧化工艺由于对有机物去除率高、污水处理效果好,在污水深度处理中的研究和应用逐渐广泛和深入。催化臭氧氧化工艺的核心在于,在催化剂的作用下,羟基自由基(·OH)浓度显著提升,从而强化污水处理效果。因此,催化剂的开发是催化臭氧氧化工艺应用研究的关键。文章总结了不含载体的、可直接作为有效成分的催化剂,如铁(Fe)、锰(Mn)、铈(Ce)、镍(Ni)、钴(Co)、钛(Ti)等金属及其氧化物,以及活性炭、碳纳米管、石墨烯等碳材料催化臭氧的效果和可能的催化机理,分析了当前研究较多的催化剂在实际应用中可能存在的问题,为催化剂的研究、开发和应用提供理论基础。

In recent years,research and application of catalytic ozonation process is more extensive and in-depth in wastewater advanced treatment,because of high organic pollutants removal rate and good wastewater treatment effect.The core of the catalytic ozonation process is that under the action of the catalyst,the concentration of hydroxyl free radicals(·OH)is significantly increased,thus enhancing the effect of sewage treatment.One key point of catalytic ozonation process is catalyst development.In this paper,several solid-phase catalysts without support material and their catalytic effect and mechanisms are summarized,including metal and metal oxides(eg:iron,manganese,cerium,nickel,cobalt,and titanium)and carbon materials(eg:active carbon,carbon nano tube,and graphene).In addition,the possible problems in practical application of these catalysts are also analyzed.The review can provide a theoretical basis for the continuous development and application of catalysts in catalytic ozonation process.