基于硫酸根自由基的高级氧化技术在污水处理中的应用

Application of advanced oxidation technology based on sulfate radical in wastewater treatment

综述了电化学活化、过渡金属离子活化、热活化、光活化等7种基于硫酸盐自由基活化过硫酸盐的高级氧化工艺,以及该技术在国内外的研究进展。总结了基于硫酸盐自由基高级氧化工艺的反应机理,并分析了温度、初始pH值、过硫酸盐浓度和降解药剂浓度等因素对该技术相关实验降解效果的影响。基于硫酸盐自由基的高级氧化工艺拥有良好的应用前景,但该技术仍有局限性。未来需要增加基于硫酸盐自由基的高级氧化工艺在真实环境下的污水净化实验,建立一套有关选择活化方法、氧化剂的种类、确定氧化剂与污染物比例的理论体系,以及开发成本低且无再次污染的活化方法,以促进该技术在降解污水方面的实际应用。

Seven advanced oxidation processes based on sulfate radical activation of persulfate are reviewed,including electrochemical activation,transition metal ion activation,thermal activation,and photoactivation,and the research progress of this technology at home and abroad.The reaction mechanism of the advanced oxidation process based on sulfate radicals is summarized,and the effects of temperature,initial pH,persulfate concentration and degrading agent concentration on the degradation effect of this technology are analyzed.Advanced oxidation processes based on sulfate radicals have promising applications,but the technology still have limitation.This paper also points out that in the future,it is necessary to increase the sewage purification experiments based on sulfate radicals in the real environment.To establish a theoretical system for selecting activation methods,types of oxidants,and determining the ratio of oxidants to pollutants.To develop low-cost and recontamination-free activation methods.These measures promote the development and application of this technology in the degradation of actual sewage.