农药生产场地污染土壤的化学氧化修复技术研究进展

    Chemical Oxidation Techniques for Soil Remediation of Contamination at Pesticide-production Sites

    • 摘要: 我国是农药生产使用大国,农药品种包括有机氯类、有机磷类和菊酯类等多代农药。农药造成的土壤污染主要发生在农药生产场地和农用地,其中农药生产场地污染土壤具有多代农药混合以及有机溶剂复合污染等特点,这类污染土壤的修复与安全利用是亟待解决的环境问题。因具有修复时间短和成本低的优点,化学氧化药剂已成为土壤修复采用的主要药剂。然而化学氧化药剂缺乏靶向性,过量使用易造成土壤理化性质破坏和二次污染。因此,农药生产场地污染土壤修复技术亟需加强绿色修复药剂的研发以及药剂与修复设备的联动。重点介绍了农药生产场地污染土壤的传统、新型和联合化学氧化修复技术研究进展及应用实例,对基于新型材料和药剂的化学氧化修复技术发展做出展望,新型土壤修复设备配合新型药剂为实现污染土壤高效修复提供保障。

       

      Abstract: China is one of the world's largest producers and consumers of pesticides, including organochlorines, organophosphates and pyrethroids. Pesticides contamination in soil mainly occur in pesticide-producing sites and agricultural land. Among them, the levels of pesticides residues and organic solvents in the pesticide-producing sites have raised serious concerns. Chemical oxidation technique, due to its advantages on low cost and short remediation time, has gained increasing attention. However, the excessive use of strong oxidants might lead to deterioration of the physicochemical properties of the soil. Therefore, it is important to consider alternative greener chemical oxidants or oxidation techniques to further improve the current technology. This review focuses on the soil remediation of the pesticide-producing sites and summarizes both conventional and emerging chemical oxidation techniques. Future outlook on new oxidants, materials and techniques for soil remediation is also discussed.

       

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