Distribution and Assessment of Heavy Metals in Topsoil of Capital Steel Factory in Beijing, China

Abstract

Abstract:

The concentration of Fe，Cr，Ni，V，As，Cd，Pb，Cu，Zn，Hg were investigated for 400 topsoil samples collected from Capital Steel Factory. The results of cluster analysis and the principal component analysis showed that the heavy metals can be mainly divided into four groups. The first group included Ni，V，As，and their mean concentrations were lower than that of the nature background. They may be primarily controlled by natural sources such as soils parent materials. The second group included Cd，Cu，Pb，Zn，and mean concentrations exceeded the nature background values. They may be derived from the anthropogenic sources, particularly traffic and smelter. The PIanalyzing results showed that the soil was lightly polluted by Cu，Pb，Zn and were moderately polluted by Cd with the hotspots located in residential area. The third group were Fe and Cr, and the highest concentrations of them distributed in industrial area and partial residential area. They may be mainly affected by natural sources and anthropogenic sources. The fourth group was Hg with the features of non-point sources associated with human activities. The highest concentration distributed in river area. In general，attention should be paid to the subsequently environmental damage and potential human health risk in this area because parts of the topsoil were polluted by the heavy metals. Our study provides a significant reference for soil pollution risk assessment and land using plan of Capital Steel Factory in the future.

Key words: Capital Steel Factory；heavy metal；soil contamination；natural source

HAN Feng, SUN Tian-He, YUAN Guo-Li, HUANG Yong. Distribution and Assessment of Heavy Metals in Topsoil of Capital Steel Factory in Beijing, China[J]. Geoscience, 2012, 26(5): 963-971.

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