鄱阳三江流域沉积物中Zn Pb Cd的形态分布

文章选取鄱阳湖饶河口三江流域七个采样点的沉积物样品,采用Tessier连续提取法研究沉积物中重金属元素(Zn、Pb、Cd)的形态分布。不同的形态分布揭示了各样点的各重金属污染程度以及分布特征。初步测定结果表明:鄱阳湖饶河口三江交汇处受到了重金属Pb,Cd,Zn不同程度的污染,但污染程度不高。在所测金属元素中以残渣态为主要形态,其次是铁锰氧化态、碳酸盐结合态。

Speciation of Zn, Pb and Cd in Sediments of Three River Drainage Area around Poyang Lake

Pollution level of Three River Drainage Area around Poyang Lake was studied. The contaminated sediments were collected at 7 selected sampling spots and speciation of heavy metals including Zn,Pb and Cd were analyzed by Tessier sequential chemical extraction method. Different speciation of heavy metals revealed the pollution level and distribution of heavy metals for different spots. Results showed that Three River Drainage Areas around Poyang Lake were suffered low grade pollution of heavy metals and heavy metals were associated primarily with residual phase and secondarily with oxidatal phase and carbonate phase.