抗多元重金属植物的有效筛选及生态修复研究——以湖南柿竹园有色金属矿区为例

摘要

[目的]筛选出适应矿区生长的抗多元重金属植物.[方法]将采集的样品干燥、研磨,采用微波消解-火焰原子吸收光谱法测定样品中重金属Cu、Pb和Zn的含量,计算出转移系数与富集系数,从而挑选出抗性强与转运效果佳的植物.[结果]柿竹园矿区土壤重金属含量高,植被覆盖率低.三棱草和木贼对Cu、Zn、Pb都有较好的富集能力和较强的转运能力,适合作为修复植物.葛根、蛇葡萄对Cu、Zn、Pb有很好的耐性,适合作为丰富生物多样性及提升植被覆盖率的植物.[结论]该研究可为矿区重金属治理提供科学依据.%[Objective]To screen the anti-multivariate-heavy-metal-plants adapted to the growth of mining area.[Method]The collected samples were dried and ground.Then the microwave digestion technique and Flame atomic absorption Spectrometry was used to determine the content of heavy metal ions Cu,Pb and Zn in the samples.Finally,the transfer coefficient and enrichment factor were calculated,and the plants with strong resistance and good effect were selected.[Result]The results showed that heavy metal contents were high in the Shizhuyuan mining area with low vegetation coverage.Pinellia ternata and Equisetum hyemale on Cu,Zn,Pb have better enrichment ability and strong transport capacity,and they were suitable for soil restoration.Radix puerariae and Ampelopsis sinica have good tolerance to Cu,Zn and Pb,and they suitable for enriching biodiversity and improving vegetation cover.[Conclusion]The study can provide reference for the treatment of heavy metal pollution in the mining area.