Water chemistry and heavy metal distribution in an AMD highly contaminated river

Water chemistry and heavy metal distribution in an AMD highly contaminated river
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AMD 高度污染河流中的水化学和重金属分布

DOI:
10.1007/s12665-009-0094-5
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发表时间:
2010
影响因子:
2.8
通讯作者:
Wu, D. S.
Wu, D. S.
中科院分区:
环境科学与生态学4区
文献类型:
--
作者:
Xiao, H. Y.;Zeng, F. P.;Zhou, W. B.;Wu, D. S.

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10年前,亚洲最大的露天铜矿德兴铜矿酸性废水对乐安河的环境影响已被充分记录。然而,该矿的矿石产量增加了四倍,河流的污染情况目前尚不清楚。研究结果表明,受AMD污染的大武河和济河河水(溶解态)、悬浮物(SS)和沉积物中的重金属浓度均呈现出高度局域化的分布特征,与前人的研究结果有显著差异。2005年乐安河大部分采样点沉积物中重金属含量较以往报道有所降低,主要原因是上下游多个历史重金属来源消失或不重要。与大武河混合处沉积物中铜含量的显著降低主要是由于贫铜矿石(<0.3%)的充分输入而造成的稀释作用。
Environmental impacts of acid mine drainage (AMD) from Dexing Copper Mine, the largest open pit copper mine in Asia, on Le An River were well documented 10 years ago. However, ore production of the mine has increased fourfold and the contamination situation of the river now is unknown. Our studies indicated that heavy metal concentrations in riverwaters (dissolved), suspended solids (SS) and sediments all showed highly localized distribution patterns closely associated with two AMD-contaminated tributaries (Dawu River and Ji River) and are significantly different from the previous findings. Compared with the previous reports, most of the sampling sites in Le An River displayed lower contents of sediments of 2005 because several historical upstream and downstream heavy metal sources disappeared or became unimportant. The surprised decrease of copper contents in sediments at the mixing location with Dawu River was mainly due to dilution from the sufficient input of poor copper ore (<0.3%).
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