松花湖水源地重金属非点源污染调查

The survey on non-point source pollution of heavy metals in Songhua River

通过对吉林松花湖及其上游入湖河流水质、底泥、动植物样品中重金属污染的调查和评价,发现20世纪80年代初开始基本得到控制的汞污染现象又呈加重趋势.底泥中汞富集系数较20世纪80年代上升1(5倍;受污染水体中的两栖动物林蛙体内甲基汞呈富集状态,较未污染河流中林蛙体内高2(29倍.汞污染的来源是上游个体手工式小采矿点随意倾倒尾矿渣,随降雨径流进入河流所致.

Based on investigation and assessment of heavy metal pollution in water, mud and creature samples of Jilin Songhua River and its upstreams, it is found that mercury pollution tended to be worse, which had ever been controlled efficiently in the early 1980's. Mercury accumulation coefficient in mud rises 1 to 5 times than that of 1980's.Concentration of methyl mercury in forest frog living in polluted water is about 2 to 29 times higher than that living in unpolluted water. The mercury pollution is mainly caused by upstreams small manual mining spots' optional dumping of gangue and entering river together with rain water.