Some characteristics of the distribution of heavy metals
in urban topsoil of Xuzhou,China |
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Authors: | Xue-Song Wang Yong Qin |
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Institution: | (1) Department of Chemical Engineering, Huaihai Institute of Technology, Lianyungang, Jiangsu, 222005, China;(2) School of Mineral Resources and Geo-Science, China University of Mining and Technology, Xuzhou, Jiangsu, 221008, China |
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Abstract: | An assessment is presented of distribution characteristics of heavy metals in the urban topsoil from the city of Xuzhou. The
concentrations of Ag, Al, As, Au, Ba, Be, Bi, Cd, Co, Cr, Cu, Fe, Ga, Hg, Li, Mn, Mo, Ni, Pb, Pd, Pt, Sb, Sc, Se, Sn, V and
Zn have been determined from 21 soil samples. Examination of lognormal distribution plots indicates that the diagrams of Al,
Be, Fe, Ga, Li, and V are almost linear suggesting that these metals are almost unaffected by anthropogenic activities while
the plots for As, Cd, Cu, Pb, Pd, Pt, Se, Zn and others are not linear probably due to anthropogenic activities from which
these metals are delivered to the soils. Al is used for mineralogical normalization of these data. An evaluation of background
values for topsoil is also carried out by means of lognormal distribution plots. The results show our background values obtained
from the lognormal distribution plots are comparable to those values of uncontaminated soils of Xuzhou obtained by previous
work except for Cd and Hg. At present, no explanation for the exceptions Cd and Hg can be given. |
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Keywords: | Background value Enrichment factor Heavy metals Lognormal distribution plot Normalization Urban soils |
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