摘要
对采自西沙海域海水中溶解态重金属Ni,Cu,Hg,Zn,Cr,Mn,Fe,Cd,Pb和Co的含量进行了测定,结果表明除了Pb,Ni外,该区域其他重金属的含量都在国家一类海水的标准范围内,但是该区域海水仍然具有近岸海水的特性.运用多元统计法探讨了重金属间的相关性,由因子分析法提出了控制西沙海域重金属含量分布的4个主因子:盐度,大气沉降,上升流和天然地球化学来源.
The concentrations of the dissolved heavy metals Ni, Cu, Hg, Zn, Cr, Mn, Fe, Cd, Pb, Co in the Xisha waters were determined by means of the atomic absorption spectrometry （AAS） and the atomic fluorescence spectrometry （AFS）. The results indicate that the other concentrations of the heavy metals are ranged in the first-rate classification of the National Seawater Standards except for Pb and Ni, and the seawater quality in this area appears in the nearshore behavior. The correlations among the heavy metals were discussed using the multi-elemental statistics. The factor analysis reveals that the distribution of the heavy metal concentrations is controlled by the salinity, atmospheric precipitation, upwelling and natural geochemistry.
基金
中国科学院知识创新工程重要方向性项目(KZCX2-YW-318)
国家自然科学基金(40676069)资助
关键词
西沙海域
重金属含量
因子分析
Xisha waters
heavy metal concentration
factor analysis
