镉污染土壤的植物修复技术

Phytoremediation for soil contaminated cadmium

重金属镉毒性大、迁移性强,具有显著的生物积累和生物放大效应,很难在环境中降解。镉能通过植物根部迁移到地表组织中,并经食物链进入人体器官,最终危害生态和人体健康。因此,镉污染土壤的治理已成为我国环境领域关注的重大课题之一。通过检索大量重金属镉污染土壤修复领域相关的文章,在分析了镉污染现状、来源及危害的基础上,总结了镉污染土壤植物修复的机理、国内外研究进展,了解植物修复技术的局限性,揭示了现有强化植物修复的途径,旨在为土壤镉污染修复提供参考,强化绿色无污染的修复技术改善土壤环境。

Heavy metal cadmium is highly toxic,highly mobile,has significant bioaccumulation and biomagnification effects,and is difficult to degrade in the environment.Cadmium can migrate through the roots of plants to the surface tissues and enter the human organs through the food chain,ultimately endangering ecology and human health.Therefore,the treatment of cadmium-contaminated soil has become one of the major issues of concern in China s environmental field.This paper analyzes the status,sources and hazards of cadmium pollution by searching a large number of articles related to the field of heavy metal cadmium contaminated soil remediation,summarizes the mechanism of phytoremediation of cadmium contaminated soil,research progress at home and abroad,and analyzes the limitations of phytoremediation technology.It reveals the existing ways to strengthen phytoremediation,aiming to provide reference for soil cadmium pollution remediation and strengthen green pollution-free remediation technology to improve soil environment.