【摘要】 湘西金矿在生产过程中产生了大量的尾矿。该区尾矿 水相互作用强烈 ,并引起了尾矿中重金属元素的释放、迁移和对水体、土壤、蔬菜等表生环境的重金属污染。污染程度较大的元素均为Au、Sb、As、Cd、Hg、W等 ,与尾矿中元素的富集特征相一致。尾矿中重金属元素的水迁移能力由大至小顺序为Au、Cd、W、Sb、Pb、As、Zn、Cu。元素的生物吸收系数由大至小顺序为Cd、Au、Zn、Hg、Sb、Cu、Pb、As、W。植物中金属元素浓度主要受土壤中的浓度、植物种类和吸收能力的影响。更多还原

【Abstract】 Large amounts of tailings were produced during mining in the Xiangxi Gold Mine, Hunan. The interaction of tailing with water has caused the release and migration of heavy metals in tailings and the contamination to surfacial environments of water bodies,soils and vegetables. The main contaminating elements are Au, Sb, As, Hg and W, and this is consistent with the elemental enrichment features of tailings. The water migration coefficients of heavy metals in tailings tend to decreased in the order: Au>Cd>W>Sb>Pb>As>Zn>Cu, similar to the pollution severity in soils and vegetable, indicating that the pollution is controlled by tailings\|water interaction. The biological absorption coefficients of heavy metals vary in a complex manner and are larger with Au, Sb, Cd, and Zn. The metallic element concentrations in plants are mainly controlled by their concentrations in soils and plants, and absorption coefficients.更多还原