北京市密云水库上游土壤重金属污染调查评价

2002年9月在密云水库周边及上游地区(北京境内)总共采集土样98个,以《土壤环境质量标准》GB15168-95Ⅰ级标准为评价标准,对密云水库上游地区土壤重金属Cd、Pb、As、Hg、Cr、Cu、Ni、Zn的污染状况作了初步评价。研究结果发现密云水库周边及上游地区重金属污染以Cr和Hg为主,牤牛河上游为污染最严重地区,清水河上游、潮河下游放马峪地区、德田沟--崎峰茶地区受Cr元素轻度污染。该地区土壤重金属污染,主要原因是金属矿山不合理排放的尾砂及废矿石等人为因素所致。

Investigation and Assessment of Pollution of Heavy Metals in theSoil of the Upstream Area of Miyun Reservoir, Beijing

A total of 98 samples of soil were collected from the upstream area of Miyun Reservoir and surroundings in September,2002.A preliminary assessment was made on the pollution status of heavy metals,which include Cd,Pb,As,Hg,Cr,Cu,Ni and Zn,according to the"Standards of Soil Environment Quality"(GB15168-1995).The results show that the pollution of heavy metals in the above areas is dominated by Cr and Hg.The most seriously polluted area was the upper Mangniu River,while the upper Qingshui River,the Fangmayu and Detiangou-Qifengcha areas in the lower Chaohe River were lightly polluted of Cr.The main causes for the pollution of heavy metals were artificial factors such as unreason- able discharge of tailings and waste ores from the metallic ore mines.