淀山湖上覆水与沉积物孔隙水中重金属的分布特征

THE DISTRIBUTION CHARACTERISTICS OF HEAVY METALS IN THE OVERLYING WATER AND THE PORE WATER OF THE SEDIMENTS OF DIANSHAN LAKE

研究了淀山湖上覆水和沉积物孔隙水中Pb ,Cd,Cr,Cu ,Fe和Mn的浓度及Eh 分布 ,分析了孔隙水中重金属的扩散通量 .结果表明 ,淀山湖中重金属的浓度由高到低依次为 :Mn >Fe >Cr,Cu ,Pb >Cd ;Fe和Mn在孔隙水中的浓度远远大于它们在上覆水中的浓度 ,表层沉积物孔隙水中Pb ,Cd ,Cr,Cu的浓度稍大于它们在上覆水中的浓度 ;

By the researches on the distribution characteristics of Pb,Cu,Cd,Cr,Fe,Mn and E h in the overlying water and in the pore water of the sediments of Dianshan lake,the diffusion fluxs of heavy metals in the pore water of the sediments were analyzed.The results show that the concentration order of the six heavy metals in Dianshan lake is Mn>Fe>Cr,Cu,Pb>Cd,the concentrations of Fe and Mn in the pore water of the sediments are much higher than those in the overlying water,the concentrations of Pb,Cd,Cr and Cu in the pore water of the surface sediments are a little higher than those in the overlying water,the quality of the overlying water may be influenced by the diffusion of heavy metals in the pore water of the sediments.