Sheng Ju-jiang, Fan De-jiang, Yang Dong-fang, Qi Hong-yan, Xu Lin
College of Life Science and Technology, Shanghai Fisheries University, Shanghai 200090, China.
Huan Jing Ke Xue. 2008 Sep;29(9):2405-12.
The concentrations of six heavy metals were determined in the fine fraction ( < 63 microm) of surface sediments in the Yangtze Estuary and its adjacent areas by an inductively coupled plasma mass spectroscopy (ICP-MS). The average contents of As, Cd, Cu, Pb, Cr and Zn are 10.47, 0.19, 37.68, 36.86, 97.80 and 98.65 mg x kg(-1), respectively. The contents of As, Cd and Cu appear gradually degressive from west to east, while the contents of Pb, Cr and Zn appear no apparent difference. In generally, the concentrations of heavy metals are higher in the south sea areas than those in the north sea areas. Environmental assessment with single factor method suggests that As, Cu, Pb, Cr and Zn are moderately contaminated, while Cd is not polluted. The values of As,Cu and Cr are between effect range-low (ERL) and effect range-median (ERM), which indicate they occasionally bring adverse biological effect at most stations, and the values of Cd,Pb and Zn are below ERL mean they rarely bring adverse biological effect by sediment quality guidelines assessment. From the results of factor analysis and cluster analysis, we conclude that the outer sea areas of the Yangtze Estuary and the Hangzhou Bay have lower sediment environmental quality, therefore much attention should be paid to these areas.
采用电感耦合等离子体质谱法（ICP-MS）测定了长江口及其邻近海域表层沉积物细颗粒组分（<63微米）中6种重金属的含量。砷、镉、铜、铅、铬和锌的平均含量分别为10.47、0.19、37.68、36.86、97.80和98.65毫克/千克。砷、镉和铜的含量自西向东逐渐递减，而铅、铬和锌的含量无明显差异。总体而言，南部海域的重金属含量高于北部海域。单因子法环境评价表明，砷、铜、铅、铬和锌受到中度污染，而镉未受污染。砷、铜和铬的值介于效应范围低值（ERL）和效应范围中值（ERM）之间，这表明它们在大多数站点偶尔最多会带来不利的生物效应，而镉、铅和锌的值低于ERL，意味着根据沉积物质量准则评估，它们很少会带来不利的生物效应。从因子分析和聚类分析结果来看，我们得出长江口外海区域和杭州湾沉积物环境质量较低，因此应高度关注这些区域。
