Title: EVALUATION OF POLLUTION OF HEAVY METALS IN LUOYANGJIANG INTER-TIDAL SEDIMENTS,QUANZHOU BAY
Abstract: In this paper,12 kinds of heavy metals compositions of the 17 surface sediment samples in the inter-tidal belt of Luoyangjiang were analyzed.The average contents of Pb,Cr,Cu,Zn,Cd and Mn in the surface sediments were higher than those in most of other bays and estuaries home and overseas,and were higher than the background values of Fujian coastal soil.Cd is the most contamination heavy metal in all sampling stations compared to Cu,Pb,Zn,Cr,Hg and Ni.Contents of Ti,V,Co and Ni varied little among different sites,while the contents of Cu,Cd and Zn have great differences in each site.Based on the total contents of heavy metals,five assessment methods were used to evaluate the pollution degree and potential ecological risk of heavy metals in the surface sediments from intertidal zone of Luoyangjiang of Quanzhou Bay.Comparison of heavy metal contents from this study with that of Marine Sediment Quality(GB18668-2002) showed that the overall average contents of all studied heavy metals in the surface sediments from Quanzhou Bay met the secondary criteria but exceeded the recommended primary criteria.The results of geo-accumulation indices showed that Cd presented strong pollution,Cu presented moderate pollution,Cr,Mn,Zn,and Pb presented low to moderate pollution,and V,Co,Hg,Fe and Ti presented almost no pollution in most of the sites.According to the indices of potential ecological risk,the consequence of the average potential ecological risk index(Eri) for heavy metal was CdHgCuCrNiZnPbCoMnVTi.On the whole,the comprehensive potential ecological risk index(RI) of the sediments showed very high degree.According to the bio-effect concentration criterion,the average contents of Cr,Ni,Cu,Zn,Cd and Pb in the surface sediments of studied area were all between the effects range low(ER-L) and the effects range media(ER-M),indicating moderate negative bio-effect.According to the integrated response factor,the pollution indicator elements and their pollution contribution order were as follows:CdCuNiZnMn,and most sampling sites were polluted seriously by heavy metals.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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Cited By Count: 1
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