土壤重金属污染的4种植物修复技术

 目前土壤受重金属污染的情况受到广泛关注，该状况在国内外都很严重。植物修复技术是新发展起来的一种利用自然生长植物或遗传工程培育植物来修复重金属土壤环境的技术，它是通过植物系统及根际微生物群落来移去、挥发或稳定土壤环境中的污染物。与传统的物理和化学修复方法相比，植物修复技术具有投资少、成本低、可盈利、对土壤环境扰动小等优点。本文主要介绍土壤重金属污染的4种植物修复技术，论述国内外重金属污染治理的现状，重点涉及植物提取和稳定2方面。超积累植物由于其生理特性适合规模性应用，而与微生物修复、动物修复等修复方式结合能更好地提高修复效果。

Review of four phytoremediation techniques for soil polluted by heavy metals

Heavy metals in soil stem from human activities which result in significantly high heavy metals contents in soil and lead to the phenomenon of ecological environment quality deterioration.Heavy metal contamination of soil is essentially an irreversible process.Many organic chemicals require a long time to degrade.Once contamination occurs it is difficult to recover by merely cutting off pollution sources.Therefore there have been a lot of soil treatment methods for heavy metals.Compared to physical and chemical remediation,phytoremediation has several advantages such as small investment,low cost,economical profit and less disturbance to the soil environment.This paper reviews four hytoremediation techniques for heavy metal contaminated soil remediation and describes both domestic and foreign heavy metal pollution control.Finally,the future development in this area is prospected.