清除土壤重金属污染的植物修复技术

根据清除土壤重金属污染的机理不同，植物修复技术可分为植物固定、植物挥发和植物提取3种基本类型．与传统的土壤重金属污染治理技术比较，该技术存在成本低、利于环保、方便操作等优点，但同时也存在修复速度慢、受环境条件限制等局限性．今后研究的重点：寻找超累积植物并研究重金属富集的机理；通过基因工程发展植物修复技术；通过物理、化学和生物方法强化植物修复技术，如发展对环境安全的化学添加剂．

Phytoremediation of Heavy Metal-Contaminated Soil

As a safe and reliable technology for heavy metal contaminated soil, phytoremendiation becomes the focus in current research. According to the different mechanism of eliminating heavy metal contamination in soil,phytoremediation can be subdivided into phytostabilization, phytovolatilization and phytoextraction. Compared with the traditional technology for recovery of polluted soil with heavy metals,phytoremendiation has such advantages as low cost, protecting environment and easier operation. But the development of this technology is limited for low speed restoration and sensitivity of environmental condition. To solve these problems,further studies on gene technology application and soil amendment in improving remediation ability should be developed.