第二松花江中上游悬浮物重金属元素分布特征

Distribution Characteristics of the Heavy Metals of the Suspended Solids in the Upper and Middle Reaches of the Second Songhua River

悬浮物是河流重金属元素的主要迁移载体。对第二松花江中上游悬浮物重金属元素分布特征进行了较系统的研究。结果表明:第二松花江中上游悬浮物中重金属元素含量变化大;枯水期悬浮物主要以吸附重金属元素能力强的粘土矿物为主,而丰水期则以长英质矿物碎屑为主;枯水期悬浮物重金属元素含量明显高于丰水期;工业污染是导致吉林市区河段悬浮物中As、Cu、Zn、Cd、Pb和Hg元素含量远高于松花湖和下游河段的主要原因。

The suspended solids are the main migration carrier of the heavy metals in rivers.The distribution characteristics of heavy metals of the suspended solids in the upper and middle reaches of the Second Songhua River are studied.The results show that content of heavy metals of the suspended solids varies remarkably in the upper and middle reaches of the Second Songhua River.In dry season minerals intensely absorbing heavy metals are enriched in the suspended solids,while in the wet season felsic minerals is main components carried.The content of the heavy metals in the suspended solids in dry season is higher than that in wet season.The content of As,Cu,Zn,Cd,Pb and Hg of in the suspended solids in Jilin urban sector is higher than that in Songhua Lake and the lower reach for industrial pollution.