光催化
矿化(土壤科学)
化学
激进的
臭氧
分解
废水
污染物
催化作用
环境化学
羟基自由基
光化学
环境工程
有机化学
环境科学
氮气
作者
Jiadong Xiao,Yongbing Xie,Hongbin Cao
出处
期刊:Chemosphere
[Elsevier]
日期:2015-02-01
卷期号:121: 1-17
被引量:287
标识
DOI:10.1016/j.chemosphere.2014.10.072
摘要
Heterogeneous photocatalysis and ozonation are robust advanced oxidation processes for eliminating organic contaminants in wastewater. The combination of these two methods is carried out in order to enhance the overall mineralization of refractory organics. An apparent synergism between heterogeneous photocatalysis and ozonation has been demonstrated in many literatures, which gives rise to an improvement of total organic carbon removal. The present overview dissects the heterogeneous catalysts and the influences of different operational parameters, followed by the discussion on the kinetics, mechanism, economic feasibility and future trends of this integrated technology. The enhanced oxidation rate mainly results from a large amount of hydroxyl radicals generated from a synergistically induced decomposition of dissolved ozone, besides superoxide ion radicals and the photo-induced holes. Six reaction pathways possibly exist for the generation of hydroxyl radicals in the reaction mechanism of heterogeneous photocatalytic ozonation.
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