过硫酸盐缓释材料的研究进展

Research progress in persulfate sustained-release materials

过硫酸盐是一种广泛应用于原位高级氧化修复土壤及地下水的氧化剂。过硫酸盐缓释载体不仅可以使过硫酸盐在地下水中长期缓速释放,并且可使相同剂量的过硫酸盐降解更多的污染物。本文综述了石蜡、水泥、硬脂酸、高分子聚合物等过硫酸盐缓释载体的特点及应用现状。将过硫酸盐缓释体应用于可渗透反应墙可有效处理污染范围较小、修复周期较长的污染场地。展望了过硫酸盐缓释材料未来的研究方向:拓展对过硫酸盐缓释材料的智能化控制释放速率研究;过硫酸盐缓释材料应用前必须对其生态环境风险进行评估;将过硫酸盐缓释材料运用到可渗透反应墙技术中以提高其商业化应用价值。

Persulfate is a widely used oxidant for the remediation of soil and groundwater by in situ advanced oxidation.The persulfate sustained release carrier can not only slow down the long-term release of persulfate in groundwater,but also degrade more pollutants with the same dosage of persulfate.This paper reviews the characteristics and application status of persulfate sustained-release carriers such as paraffin,cement,stearic acid,and polymer.Applying persulfate sustained-release agents to permeable reaction walls can effectively treat contaminated sites with smaller pollution range and longer remediation period.The future research directions of persulfate sustained-release materials are looking forward,such as:expanding the research on intelligent control of release rate of persulfate sustained-release materials;evaluating the ecological and environmental risks of persulfate sustained-release materials before application;applying persulfate sustained-release materials to permeable reaction wall technology to enhance its commercial application value.