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采用因子分析法对2009年5月采自连云港近岸表层沉积物中的重金属(Cu、Pb、Zn、Cd、C r、As)、常量元素(A l2O3、Fe2O3、MnO、TiO、CaO)、有机碳和粒度等数据进行了综合分析研究,以此定量判别重金属的来源方式和富集形态。借助于重金属和A l散点图的线性回归分析验证了因子分析获得的结论,结果表明:Cu、Zn和C r以自然来源为主,主要赋存于细粒粘土矿物中;Pb、Cd和As除受环境背景贡献外,还受到人为活动排污的明显影响。
The contents of heavy metals (Cu, Pb, Zn, Cd, Cr, As), major elements (Al 2 O 3, Fe 2 O 3, MnO, TiO and CaO) in surface sediments from Lianyungang coastal area in May 2009, Organic carbon and particle size data were analyzed comprehensively, in order to quantitatively determine the sources of heavy metals and enrichment morphology. The results obtained from the factor analysis were validated by means of linear regression analysis of scatter plots of heavy metals and A l. The results showed that Cu, Zn and C r were mainly from natural sources and mainly existed in fine-grained clay minerals. Pb, Cd and Apart from the contribution of environmental background, As is also significantly affected by anthropogenic sewage discharge.