基于臭氧的组合氧化法降解有机污染物研究进展

介绍和比较了O3/过氧化氢、O3/UV、O3/羟胺以及O3/过硫酸盐等组合工艺中污染物的降解效果、影响因素、动力学及主要反应机理,总结了不同组合工艺的优缺点及实际应用中存在的问题。基于O3的组合氧化工艺,利用羟基自由基(HO·)和硫酸根自由基(SO4·-)的强氧化性,能够显著提高污染物的降解性能。相比传统的高级氧化处理方法,O3组合氧化法具有强氧化性、低选择性、高处理效率,应用前景广阔。认为应降低O3制备成本,增强水中O3的转化率和利用率,探讨复杂基质中自由基抑制剂的存在对O3组合工艺反应速率的影响,加强对不同性质和结构的有机污染物、不同组合体系的反应条件控制、反应动力学及反应机理的研究,并开发适用于工业化生产及工程化应用技术。

Research Progress on the Degradation of Organic Pollutants by Ozone-based Combined Oxidation Process

The degradation performance of pollutants,influential factors,kinetics and main reaction mechanisms of O3/hydrogen peroxide,O3/UV,O3/hydroxylamine and O3/persulfate processes are investigated and compared.The advantages and disadvantages of different integrated processes and the problems in practical application have been summarized as well.Due to the strong oxidizability of hydroxyl radicals and sulfate radicals,the O3-based combined oxidation processes could significantly enhance the degradation efficiency of pollutants.The O3-based combined oxidation processes have the advantages of strong oxidizability,low selectivity,remarkable treatment capability and broad application prospect in comparison with traditional advanced oxidation process.It is believed that future researches would be focus on the reduction of the O3 production cost,the improvement of the conversion rate and utilization rate of O3 in water,and the influences of the free radical inhibitors in complex matrix on the removal efficiencies of O3-based combined oxidation processes.Moreover,more researches on the organic pollutants with different properties and structures,reaction conditions,kinetics and reaction mechanisms in different O3-based combined oxidation processes should be strengthened.Furthermore,the technologies suitable for industrial production and engineering applications should be developed.