活化过氧乙酸技术降解环境有机污染物的研究进展

Research progress on the degradation of environmental organic pollutants by activated peracetic acid technology

近年来,以抗生素、内分泌干扰物等为代表的新污染物在环境中被频繁检出,对生态系统和人类健康构成潜在风险,高效稳定的有机污染物控制技术研发是当前环境领域的研究热点。以活化过氧乙酸的高级氧化技术为研究对象,对过渡金属、碳材料及其复合材料活化过氧乙酸的效果及其降解有机污染物的机制进行系统论述,重点探讨反应过程中的自由基(有机自由基、羟基自由基)和非自由基(单线态氧、高价金属氧物种、电子转移和表面络合的复合物)降解机制,总结了活化过氧乙酸技术在废水、土壤或沉积物、地下水等环境介质中对污染物的降解效果。提出了未来研究重点,即开发高效稳定的活化过氧乙酸催化剂,加强活化过氧乙酸技术在土壤和沉积物中降解有机污染物机制的探索,深入联合其他处理技术的应用研究。

The frequent detection of emerging contaminants poses a potential risk to ecosystems and human health,such as antibiotics and endocrine disruptors in the environment in recent years.The research and development of efficient and stable organic pollutant control technology is a research hotspot in the current environmental field.Taking the advanced oxidation technology of activated peracetic acid(PAA)as the research example,the effectiveness of activated PAA through transition metals,carbon materials and their composites,and their degradation mechanism of organics were discussed,with emphasis on the degradation mechanism of free radicals(organic radicals,hydroxyl radicals)and non-radicals(singlet oxygen,high-valent metal-Oxo species,electron transfer and surface complexes).In addition,the application effect of activated PAA in wastewater,soil or sediments,groundwater,and other environmental media for the degradation of organic pollutants was summarized.Finally,future research focuses were proposed,including developing the catalysts of activated PAA with efficiency and stability,strengthening the mechanism exploration of activated PAA to degrade organic pollutants in soil and sediment,and deepening the application studies of combined treatment technologies.