湖南省有色金属矿区重金属污染土壤的植物修复

Analysis of the Feasibility of Utilizing Plants to Repair Heavy Metal-contaminated Soils of Non-ferrous Metal Mine Area in Hunan Province

随着湖南有色金属矿产的大规模开采,越来越多的重金属随尾矿砂进入矿区周边土壤,造成大面积的面源污染,由此导致的环境污染公害事件时有发生.在综合评价湖南省主要有色金属矿区土壤重金属污染现状的基础上,通过对矿区周边优势植物物种进行现场实地筛选和研究,论述了利用累积和超累积植物修复矿区重金属污染土壤的可行性,从而为矿区土壤重金属污染治理、土地复垦和生态植被恢复提供了科学依据.

With the large scale exploitation of the Non-ferrous Metal Mine in Hunan Province, a large amount of heavy metal entered mining area soil with the tailing. The problem of soil＇s heavy metal pollution has become more and more severe. Through investigation in the pollution scene, the current situation of heavy metal-contaminated soils of the Non-ferrous Metal Mine was comprehensively appraised. Then many advantage plant species around the mining area were screened and studied. A lot of approaches have achieved in the investigation and eultivation of hyperaccumulator plants rhizosphere processes and manipulation, the mechanisms of hyperaecumulation, tolerance and detoxification to heavy metals. On the whole, the paper has proved the feasibility of using accumulator plants or hyperaccumulators to repair heavy metal-contamlnated soils and offered a scientific basis with the removal of heavy metals from heavy metal-contaminated soils, reelalmation and eco-restoration of the Non-ferrous Metal Mine area.