【摘要】 德兴铜矿是亚洲最大的露天铜矿,其酸性矿山废水(AMD)对乐安江的影响在20世纪80—90年代曾得到了系统的评价.然而,相比10年前,该矿山的产量已经增加4倍,但乐安江重金属污染变化情况目前尚不了解.研究表明:乐安江河水、悬浮颗粒物和沉积物中重金属的空间分布主要与德兴铜矿和银山铅锌矿的AMD输入有关.与10年前相比,如今由于乐安江上下游的几个重金属污染源被清理掉了,所采集到的样品中Cu,Pb和Zn的含量都比较低;而且由于贫铜矿石(w(Cu)<0.3%)得到了充分利用,乐安江沉积物中Cu含量明显下降.更多还原

【Abstract】 Dexing Copper Mine is the largest outcrop copper mine in Asia.The influence of its acid mine drainage(AMD) on the Le’an River was systematically evaluated well in 1980s to 1990s.However,ore production of the mine has increased four times in recent 10 years and the current contamination situation of the river was unknown.The studies indicated that the spatial distribution of dissolved matters and suspended solids(SS) in the riverwaters and heavy metals in the sediments was closely associated with the input of AMD from two mines,i.e.Dexing Copper Mine and Yinshan Lead-zinc Mine.Compared with the reports ten years before,most of the sampling sites in the Le’an River displayed lower contents of copper,lead and zinc,because several historical upstream and downstream heavy metal sources had disappeared.The surprised decrease of copper contents the in sediments was mainly due to the sufficient utilization of lean copper ore(<0.3%).更多还原