Some characteristics of the distribution of heavy

Authors: XueSong Wang Yong Qin

Publish Date: 2006/12/23

Volume: 29, Issue: 1, Pages: 11-19

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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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