%0 Journal Article %T 南京玄武湖底泥重金属形态与环境意义 %T Speciation of heavy metals in sediments from Lake Xuanwu and their environmental significance %A 张立 %A 袁旭音 %A 邓旭 %A ZHANG,Li %A YUAN,Xuyin %A DENG,Xu %J 湖泊科学 %J Journal of Lake Sciences %@ 1003-5427 %V 19 %N 1 %D 2007 %P 63-69 %K 底泥;重金属;生物有效性;玄武湖 %K Sediment;heavy metals;bioavailability;Lake Xuanwu %X 通过对玄武湖12个底泥样品采用连续提取的方法, 分别获得湖中6种金属的总量和形态分布数据, 并用因子分析的方法对金属总量进行统计分析.金属总量结果表明, 部分样点的Ni和大部分样点的Cr、Pb、Zn超过背景值, 显示有轻度污染, 这与玄武湖周围的地理环境和人类活动对底泥重金属的影响有关.对金属形态分析的结果表明, 在所测金属中残渣态是主要的存在形式, 其次比例较高的是有机物和硫化物结合态, 而Pb、Zn有潜在的生物危害性. %X Six elements (Ni, Cu, Cr, Pb, Mn, Zn) in twelve sediment samples from Lake Xuanwu were studied by BCR sequential extraction method to obtain their distribution features in this region and the data were analyzed with Factorial Analysis method.The results showed that the metal concentrations of Ni, Pb, Zn in some sediments of Lake Xuanwu exceeded the background levels, revealing slight pollution, which were affected by the geological setting and the anthropogenic input.Metals detected was mainly associated with the residual fraction in the lake, and the oxidable fraction was followed.The acid soluble fraction of Pb, Zn had higher percentages in total contents than other four metals, so their potential risk to aquatic organisms must be considered. %R 10.18307/2007.0110 %U http://www.jlakes.org/ch/reader/view_abstract.aspx %1 JIS Version 3.0.0