过硫酸盐电化学活化修复土壤有机污染物研究进展

基于硫酸根自由基的新型高级氧化技术近年来被广泛用于环境污染修复,尤其是在有机污染物降解和修复方面效果显著。活化过硫酸盐化学氧化技术的关键在于如何通过活化过硫酸盐以产生强氧化性的硫酸根自由基(SO_4^?-)。电化学活化方法作为产生硫酸根自由基的有效方法之一,近年来受到研究者的广泛关注。本文对过硫酸盐电化学活化过硫酸盐在土壤有机污染物修复中的应用进行了全面的回顾,揭示了其作用机理及其在有机污染土壤修复中应用的优点,讨论了包括电极材料、体系pH、电流密度、过硫酸盐浓度以及过硫酸盐注入点位等因素对电化学活化过硫酸盐去除土壤中不同有机污染物效果的影响。结合现有研究案例,提出了电化学活化过硫酸盐修复土壤有机污染的未来发展方向,以期为该技术在未来实际修复工程中的应用提供技术指导。

Research Progress On Remediation Of Soil Organic Pollutants By Persulfate Electrochemical Activation

Recently, advanced technology based on sulfate radical has been widely applied for environmental pollution remediation, which has outstanding effects on organic contaminants degradation. The key point of activated persulfate chemical oxidation technology is how to produce strong oxidizing sulfate radical (SO₄.^_-) through activating persulfate chemicals. Electrochemical activation has attracted widely attention as one of the effective methods to produce sulfate radical. This paper comprehensively summarized the application of electrochemical activation in soil organic pollution remediation, and revealed the mechanism and advantages as well. The discussion was fouced on the effects of electrode materials, pH, current density, concentration of persulfate and injection point of persulfate on electrochemical activation of persulfate. For organic comtaminated soils remediation with electrochemical activated persulfate, based on the documented studies, we proposed the possible study area to provide technical guidance for the usage of this technology in the future practical remediation projects.