贵州废弃铅锌矿区优势植物中汞、砷含量及富集特征研究

为了探讨重金属在植物体内的富集特征,以贵州废弃DX铅锌矿区长势较好的27种植物为研究对象,利用原子吸收(AA800)、原子荧光(AF-640)等仪器测定植物体内Hg、As的含量。采用富集系数法和聚类分析法,通过对植物中重金属的含量及分类进行分析。结果表明,27种植物分为5类11个科属,肾蕨科蜈蚣草自成一类,对As的富集能力较强,在其体积累量平均值为36.13mg/kg,富集系数为0.863,可作土壤环境中砷污染修复植物;矿区采集的优势植物对汞的富集能力较小,富集系数最大的为荨麻科糯米藤0.144,说明汞不易从土壤环境中向所研究的植物体内迁移、积累。这为矿区土壤生态环境植物修复提供理论参考。

Enrichment characteristics and metal content of Mercury,Arsenic at dominant plants in abandoned lead-zinc mine of Guizhou province

To research the enrichment characteristics of heavy metals in plants,the research object was 27 kinds of plants which were growing well in DX abandoned lead-zinc mine of Guizhou province.Instruments such as Atomic absorption （AA800） and Atomic fluorescence （AF-640） were detected the contents of Mercury and Arsenic in plants.We used methods such as the enrichment coefficient method and clustering which can analysis the content of heavy metals in plants.The result showed that 27 kinds of plants were divided into five categories of 11 families and genera,Nephrolepiscordifolia Presl,the strong enrichment ability of As in their body accumulation.The average accumulation were 36.13 mg/kg,enrichment factor were O.863,so it can be used as contaminated soil remediation plants of Arsenic; The enrichment capacity of mercury was less in advantage plants and the largest were Herba Gonoslegiae Hirtae which was 0.144.It indicated that mercury of the soil environment were not easily migrated and accumulated in plants.And it can provide theoretical reference in soil ecological environment.