摘要
对有色金属矿区土壤和植物重金属污染状况调查结果表明,由于遭受尾矿砂及矿毒水污染,矿区土壤极端贫瘠,土壤中Pb、Cd、Zn和Cu含量分别达764.74、4.10、372.75和95.57 mg.kg-1,重金属污染较为严重。在矿区周边有9种优势植物能够在污染土壤上定居,对Cu、Cd、Pb和Zn 4种重金属元素均有不同程度的积累,积累量均未达到超累积植物所规定的临界含量。其中的野菊花〔Dendranthema indicum(L.)Des Mou l.〕、旋鳞莎草〔Cyperusm ichelianus(L.)L ink〕、五节芒〔M iscanthus floridulus(Lab ill.)W arb.ex Schum.et Laut.〕3种植物地上部生物量较大且对某些重金属向地上部转运能力较强,对重金属污染土壤有一定的修复潜力。
The present condition of soil and plant contaminated by heavy metals in a non-ferrous mining site was systematically investigated. The result showed that the soil was serious lean and contaminated with a exremely high heavy metal＇s concentration of Pb （764.74 mg · kg^-1） , Cd （4. 10 mg · kg^-1） , Zn （ 372.75 mg · kg^-1 ） and Cu （95.57 mg · kg^-1 ） respectively due to the Pb-Zn mining tailings and mine toxic water pollution. Nine predominant plant species were found successfully settling on contaminated soil, but the contents of Pb, Zn, Cu and Cd in these plants did all not reach the critical content of hyperaccumulator. The biomass of above-ground part and ability of heavy metals up to transport of Dendranthema indicum （ L. ） Des Moul, Cyperus michelianus （ L. ） Link and Miscanthus floridulus （Labill.） Warb. ex Schum. et Laut. were higher than other plant species, and the contents of some heavy metals in stems and leaves of above-mentioned three species were higher than that in roots, which indicating that these species had certain potential ability to remediate contaminated soil.
出处
《植物资源与环境学报》
CAS
CSCD
2006年第2期63-67,共5页
Journal of Plant Resources and Environment
基金
中日合作丰田基金项目(ToyotaFundD01-B3-010)
湖南农业大学科技创新基金(040PT02)资助项目
关键词
铅锌尾矿
重金属
复合污染
植物修复
Pb-Zn mining tail
heavy metal
compound pollution
phytoremediation
