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淀山湖沉积物孔隙水中重金属元素分布特征
引用本文:王小庆,郑乐平,孙为民. 淀山湖沉积物孔隙水中重金属元素分布特征[J]. 中国环境科学, 2004, 24(4): 0-0
作者姓名:王小庆  郑乐平  孙为民
作者单位:上海大学环境工程与科学系 上海200072
基金项目: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.

关 键 词:上覆水  孔隙水  重金属  
文章编号:1000-6923(2004)04-0400-05
收稿时间:1900-01-01;
修稿时间:2003-11-14

The distribution characteristics of heavy metal elements in the pore water of sediment, Dianshan Lake
WANG Xiao-qing,ZHENG Le-ping,SUN Wei-min. The distribution characteristics of heavy metal elements in the pore water of sediment, Dianshan Lake[J]. China Environmental Science, 2004, 24(4): 0-0
Authors:WANG Xiao-qing  ZHENG Le-ping  SUN Wei-min
Abstract: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.
Keywords:overlying water  pore water  heavy metal
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