Monitoring and Pollution Assessment of Heavy Metals in Fishes of Songhua River
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Abstract:
In order to investigate the current status of heavy metal pollution in fishes of the Songhua River, the Microwave-digestion and ICP-MS method was used to determine the concentrations of Cu, Zn, Cr, Cd, Pb, Hg, and As in fishes, and the heavy metal pollution status was assessed using the comprehensive pollution index method. The results showed that (1) the contents of heavy metals in fishes from high to low are Zn, Cu, Cr, As, Pb, Hg, and Cd, and the sources of six heavy metals are similar except for Hg; (2) the contents of heavy metals in fishes of the Second Songhua River are higher than those in fishes of the Nen River and main stream of the Songhua River; and (3) based on the evaluation criterion of NK 5073-2006 and GB 13106-1991, the contents of Pb, As, Cr, and Zn exceed the standard values, especially the pollution status of Pb and As is serious.
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