螯合剂强化植物修复对重金属污染土壤的修复研究进展

Advances in Phytoremediation of Heavy Metal Contaminated Soils by Chelating Agents

植物修复重金属污染土壤作为一种绿色修复技术,成为国内外土壤修复关注的焦点。然而,目前研究的超累积植物其往往表现为植株矮小、生物量低、生长缓慢等,严重阻碍了植物修复技术在重金属污染土壤的推广应用。因此,利用生物诱导剂强化植物修复重金属污染土壤成为了有效可行的替代方法。本文综述了螯合剂的种类及效应、螯合剂在诱导植物修复土壤重金属污染的应用及影响螯合剂对重金属的活化效率的主要因素,同时对螯合剂在强化植物修复重金属污染土壤方面做了展望,以期为螯合剂强化植物修复技术推广应用提供理论支撑。

Phytoremediation of heavy metal contaminated soil, as a green remediation technology, has become the focus of soil remediation at home and abroad. However, the hyper-accumulative plants studied at present are usually characterized by short plants, low biomass and slow growth, which seriously hinders the popularization and application of phytoremediation technology in heavy metal contaminated soil. Therefore, the use of biological inducers to strengthen phytoremediation of heavy metal contaminated soil has become an effective and feasible alternative method. In this paper, the types and effects of chelating agents, the application of chelating agents in inducing phytoremediation of heavy metal contaminated soil and the main factors affecting the activation efficiency of chelating agents on heavy metal contaminated soil were reviewed. At the same time, the prospect of chelating agents in strengthening phytoremediation of heavy metal contaminated soil was made, in order to provide theoretical support for the popularization and application of chelating agent enhanced phytoremediation technology.