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作 者 ：汪文云;张朝晖*

期 刊 ：植物研究 2008年 28卷 6期 页码：760-763

关键词：紫茎泽兰；重金属；元素测定；富集能力；耐受能力；

Keywords:Eupatorium adenophorum, heavy metal, element mensuration, enrichment,

摘 要 ：利用原子吸收法对贵州水银洞金矿紫茎泽兰及其基质中Cr、Pb、Zn、Cd、Hg和As含量进行了测定和分析。结果表明，贵州水银洞金矿废水处理区土壤Hg(12.575 mg·kg^-1)和As(501.374 mg·kg^-1)已严重超标，Hg和As的平均含量分别是国家土壤环境质量三级标准(GB15618-1995)的8.383倍和12.534倍，污染极为严重；紫茎泽兰对该矿区不同的重金属富集能力不同，尤其对该矿区Cr有较强的富集作用，具有一定的Cr污染修复潜力。紫茎泽兰对所测定的6种重金属元素的吸收转移能力有较大的差异，整个植株对Pb、Zn 和Cr具有很强的吸收转移能力。其茎、叶对不同的重金属元素的吸收转移能力也呈现出很大的差异，紫茎泽兰茎对Cr、Pb和Cd具有很强的吸收转移能力，而叶对Zn、Pb和Hg具有很强的吸收转移能力。除As外，紫茎泽兰对Cr、Pb、Zn、Cd和Hg都具有不同程度的耐受能力，对该矿区的生态恢复具有重要的作用。

Abstract:Concentrations of Cr, Pb, Zn, Cd, Hg and As in Eupatorium adenophorum and its soil, which collected from Shui Yindong gold deposit in Guizhou, were analyzed using the Atomic Absorption Spectrometry. The results showed that the soil in this research area was seriously contaminated with extremely high heavy metal’s concentration of Hg(12.575 mg·kg^-1) and As (501.374 mg·kg^-1). Compared to soil environmental quality standards of China (GB15618-1995), the average concentrations of Hg and As were 8.383 and 12.534 times higher, respectively. The results showed that this area had been seriously contaminated by Hg and As. The enrichment ability of E. adenophorum to Cr, Pb, Zn, Cd, Hg and As were quite different. Especially, it could accumulate Cr intensively. The absorbability migration abilities to heavy metals Cr, Pb, Zn, Cd, Hg and As of E. adenophorum were also obviously different. The absorbability migration abilities to Pb, Zn, Cr of E. adenophorum were very strong. The absorbability migration abilities to heavy metals of the stem and leaf of E. adenophorum were also obviously different. The absorbability migration ability to Cr，Pb and Cd of its stem were very strong while it to Zn，Pb and Hg of its leaf were very strong. E. adenophorum is very significant for the entironment revegetation of this mine as its tolerance to Cr, Pb, Zn, Cd, Hg except for As.

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