淀山湖沉积物孔隙水中重金属元素分布特征  

The distribution characteristics of heavy metal elements in the pore water of sediment, Dianshan Lake

作　　者：王小庆[1] 郑乐平[1] 孙为民[1] 

机构地区：[1]上海大学环境工程与科学系,上海200072

出　　处：《中国环境科学》2004年第4期400-404,共5页China Environmental Science

基　　金：上海科技"启明星"计划项目(00QG14003);上海市高等学校科技基金资助项目(QF57)

摘　　要：用原子吸收光谱仪测定了淀山湖上覆水体和沉积物孔隙水中Pb、Cu、Cr、Cd、Fe和Mn的浓度.结果表明,上覆水体中及沉积物孔隙水中重金属元素浓度由高到低的顺序,夏季为Fe>Mn>Cr(Cu)>Pb>Cd,冬季为Mn>Fe>Cr(Cu)>Pb>Cd.各种重金属元素在孔隙水中的浓度比上覆水体中的浓度高得多,且在孔隙水中随深度均呈现典型的峰型分布;但随季节的变化,峰值发生位移.重金属元素的浓度在沉积物-水界面处变化明显,夏季沉积物中的Cr对上覆水体水质的影响较大.The concentrations of Pb, Cu, Cr, Cd, Fe and Mn in the overlying water and the pore waters of Dianshan Lake sediment were determined using PERKIN-ELMER 5100PC AAS. The orders of the heavy metal element concentrations are Fe>Mn>Cr(Cu)>Pb>Cd in summer and Mn>Fe>Cr(Cu)>Pb>Cd in winter. The concentrations of these elements in the pore water were much higher than those in the overlying water and showed a typical peak distribution with depth; but the position of maximum peak value move with the seasonal variation. At the water-sediment interface, the concentrations of these elements had an obvious variation. In summer, Cr in the sediment had greater influence on the quality of overlying waters.

关 键 词：上覆水 孔隙水 重金属 

分 类 号：X703.5[环境科学与工程—环境工程]