螯合剂辅助植物修复重金属污染土壤研究进展

摘要

植物修复重金属污染土壤是一种成本低且环境友好的技术,但超累积植物品种少,普通植物提取重金属效率低是植物修复的最大问题所在.螯合剂常用来促进非超累积植物吸收、运输土壤中重金属,不过部分效果较好螯合剂如EDTA不易生物降解、对植物有毒害作用限制了其应用.本文对国内外螯合剂辅助植物修复重金属土壤的研究及应用进行了简要的综述,并对近年缓释螯合剂技术进行了探讨和展望.%sPhytoremediation is a low cost and environmentally friendly technologies of remediation heavy metal contaminated soil,but less varieties of hyperaccumulator and low efficiency of the plant extracts heavy metals is the biggest problem of phytoremediation.Chelating agent used to promote non-hyperaccumulator absorb and transport heavy metals in the soil,but some high efficiency chelating agents such as EDTA readily biodegradable and have toxic effects on plant limits its application.In this paper chelator assisted phytoremediation of heavy metal research and application at home and abroad are briefly reviewed,and a chelating agent for sustained-release technology in recent years were discussed and prospects.