RESEARCH PROGRESS ON IRON ACTIVATED PERSULFATE IN SITU REMEDIATION OF ORGANIC CONTAMINATED SOIL
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摘要: 原位化学氧化修复技术(in situ chemical oxidation,ISCO)是处理场地污染物的常用方法。过硫酸盐(S2O82-)作为原位化学氧化技术使用的1种新兴修复剂,具有更加稳定、易传质、pH适用范围广的特点。通过光、热、过渡金属等条件可以对S2O82-进行活化,分解产生SO4-·。在分析过硫酸盐氧化机理时,介绍了不同活化方式对过硫酸盐氧化降解有机污染物的影响,重点阐述了不同铁活化方式活化过硫酸盐在有机污染土壤的研究现状,同时对存在的问题及发展趋势进行了展望。Abstract: In-situ chemical oxidation remediation technology is a commonly used method to treat site contaminants. Persulfate(S2O82-), as a new remediation agent in situ chemical oxidation technology, is more stable, easier to be transfered and has a wide range of pH applications. S2O82- can be activated and decomposed to SO4-· under light, heat, transition metal and other conditions. In this paper, the effects of different activation modes on the oxidative degradation of organic pollutants by persulfate were introduced in the analysis of persulfate oxidation mechanism, and the research status of persulfate activation by different iron activation modes in organic-contaminated soil was emphatically introduced. At the same time, the existing problems and the development trend were prospected.
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Key words:
- iron activation /
- persulfate /
- in-situ remediation /
- organic contamination /
- soil remediation
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