福建三沙湾海洋沉积物中重金属和过渡元素来源分析

依据2004年的调查资料,分析了三沙湾海洋沉积物的重金属和过渡元素的含量,对过渡元素的分布特征、过渡元素与重金属的相关性进行了系统研究,并探讨了其环境和物源意义。结果表明:沉积物中的Cd、Cu、Hg、Pb与Fe2O3有很好的相关性。三沙湾周边的山脉富含金属矿石,这种矿石含有Fe2O3、Ni和Mn等多种元素,矿石经过暴雨冲刷和江河径流将多种元素带入海洋沉积物中,使得Cu和Zn都有较高含量,高于中国浅海沉积物含量,高于福建省土壤背景值,说明这种现象主要是天然来源占多数,人为输入占少量。

Analysis on Source of Heavy Metals and Transitional Element in Maine Sediment in the Sansha Bay of Fujian

Based on the investigation of 2004, the paper analyzed the contents of heavy metals and transitional elements in marine sediment in the Sansha Bay. The distribution characters of transitional elements, and correlation between transitional elements and heavy metals were systematically studied, and significance of the environment and material source was also discussed. The results showed good correlation between Cr, Cu, Hg,Pb and Fe2O3 in marine sediment. Mountain ranges around the Sansha Bay contain metal ore which is enriched in a variety of elements, such as Fe2O3 ,Ni and Mn. Metal ore was eroded by rainstorm and a great volume of elements was carried into marine sediment by river runoff, resulting in higher contents of Cu and Zn, which are were higher than those of the sediments of shallow sea of China and background values of soil in Fujian province. These features indicate that the heavy metals are largely from natural source, with minor from contamination.