重金属污染土壤淋洗优化技术进展

Progresses in optimization techniques for leaching of heavy metal-contaminated soil

综述了重金属污染土壤常规淋洗的优化技术,包括复合减量化技术、淋洗助剂的使用等化学优化技术以及电动力法、超声和微波法等物理优化技术;同时介绍了新型绿色淋洗剂的研发和使用情况,包括可降解螯合剂、植物浸提液及生物表面活性剂;概述了淋洗液的后处理和回用工艺。提出了开发新型淋洗剂、淋洗优化技术及淋洗液后处理技术的建议。

The optimization techniques of conventional leaching of heavy metal contaminated soil are reviewed,including chemical optimization techniques such as composite reduction and leaching additive method,as well as physical optimization techniques such as electrodynamic,ultrasonic and microwave methods.At the same time,the development and application of new environment-friendly extractants are introduced,including degradable chelating agents,plant extracts and biosurfactants.The post-treatment and reuse processes of extractants are summarized.Suggestions for developing new extractant,leaching optimization technique and extractant post-treatment technology are proposed.