Title: Total Contents and Species of Heavy Metals in Sediment of Qinhuai River
Abstract: In order to find out the direct and potential harmful influence of heavy metals in sediment of inner Qinhuai river and supply scientific data to the protection against heavy metal pollution, this paper studied the total amount and morphological characteristics of heavy metals in the sediment of inner Qinhuai river by measuring the total amount and using selective sequentially extraction method.The total amount of each heavy metal element except chromium exceeded the background value of soil in Nanjing.It was found that Zn, As and individual sectional Cd belonged to the heavy-degree pollution, Hg, Pb, and Cu belonged to middle-degree pollution, and the severities of pollution were in an order of ZnAsCdHgPbCuCr.Analysis on the morphological characteristics of heavy metals showed that the content of exchangeable Cd was highest in the sediment of inner Qinhuai river, Pb was the second highest while As was the lowest, Cu and Zn existed mainly as organic matter bound and Fe-Mn oxides bound.In inner Qinhuai river, the heavy metals which were most likely to harm the biological environment directly were Cd, Pb and Hg, and the heavy metals which had potential harm were Zn, Cu and As.Source-searching analysis on the correlation of the total amount of heavy metal elements in the sediment to the total phosphorus content showed that Cu, Zn and Cd were mainly from domestic sewage.
Publication Year: 2008
Publication Date: 2008-01-01
Language: en
Type: article
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Cited By Count: 2
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