Arsenic in the food chains of a revegetated metalliferous mine tailings pond.
Arsenic in the food chains of a revegetated metalliferous mine tailings pond.
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重新植被的金属矿尾矿池食物链中的砷。
DOI：
10.1016/s0045-6535(99)00012-0
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发表时间：
1999
期刊：
影响因子：
8.8
通讯作者：
M. Johnson
中科院分区：
文献类型：
--
作者：
A. Milton;M. Johnson
研究了砷在金属尾矿草地生态系统中的环境分布、迁移和生态毒理风险。尾矿中的高砷含量（630 ± 34 mg kg−1）并未反映在活的植被中，因为尾矿的物理化学性质会减轻植物的吸收。然而，砷水平的升高与植物凋落物有关。食草无脊椎动物中的低浓度砷反映了在其食物中发现的砷，尽管有证据表明存在轻微的食草食物链转移。小型哺乳动物的饮食暴露于砷远低于证明诱导毒理学反应，组织浓度始终低于分析检测限。在所调查的矿区，砷残留物似乎几乎没有生态毒理学风险。
The environmental distribution, transfer and ecotoxicological risk associated with arsenic in a grassland ecosystem established on metalliferous mine tailings has been determined. High levels of arsenic in the mine tailings (630 ± 34 mg kg−1) were not reflected in live vegetation due to the physico-chemical nature of the tailings which mitigate against plant uptake. However, elevated levels of arsenic were associated with plant litter. Low concentrations of arsenic in herbivorous invertebrates mirrored those found in their food, although there was evidence of minor detritivoral food chain transfer. Dietary exposure of small mammals to arsenic was well below that demonstrated to induce a toxicological response, and tissue concentrations were consistently below analytical detection limits. There appears to be little ecotoxicological risk associated with arsenic residues at the mine site investigated.