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.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
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)
关键词
上覆水
孔隙水
重金属
overlying water
pore water
heavy metal
