Title: Discussion of different heavy metal quality assessment standards of urban soil.
Abstract: The heavy metal contents of soil in one district of Guangzhou City were investigated.The total contents and available contents of As,Hg,Cr,Cd,Ni and Pb in 34 soil samples collected from the study area were analysed.The relationship between the total contents and available contents was discussed and evaluated using 4 kinds of soil quality standards.The results showed that the soils in the industrial,downtown and suburban residential zones of the study area were simultaneously contaminated by two or three heavy metal elements to some extent.The average available contents of As,Hg,Cr,Cd,Ni and Pb in the soils were 0.09,0.004,0.09,0.18,0.40,and 32.80 mg/kg,respectively.In addition,the ratio of available content to total content of Cd and Pb were higher than that of others.Using the second class of Soil Environment Quality Standard(SEQS)(GB15618-1995),the available content background values,the total content background values and the third class of SEQS as the indexes for evaluation,about 62%,29%,24%,and 21% of the soil samples exceeded the upper limit values of soil content,respectively.Therefore,using the available content background values to evaluate the heavy metal contamination of urban soil is feasible.
Publication Year: 2009
Publication Date: 2009-01-01
Language: en
Type: article
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