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《Journal of Instrumental Analysis》 2009-04
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Heavy Metal Distribution and Ecological Risk Assessment in Surface Sediments of Daya Bay

GU Yang-guang1,WANG Zhao-hui1,FANG Jun2,SHU Yong-hong2,WU Qing-hui2,MU De-hai2,L Song-hui3 (1.Institute of Hydrobiology,Jinan University,Guangzhou 510632,China;2.Guangdong Key Laboratory of Chemical Emergency Test,China National Analytical Center(Guangzhou),Guangzhou 510070,China;3.Research Center of Harmful Algal Bloom and Aquatic Environmental Science,Jinan University,Guangzhou 510632,China)  
The heavy metal distribution in surface sediments of Daya Bay and the assessment of their potential ecological risks were studied.The surface sediment samples were collected from Daya Bay between July 2006 and November 2007 and the concentrations of the heavy metals,namely Hg,Pb,Cu and Zn were determined by spectrometric methods.The results showed that the concentrations of Hg,Pb,Cu and Zn were all below the quality standard of class Ⅰ marine sediment:the concentration ranges of Hg,Pb,Cu and Zn were 0.009-0.158 mg/kg,11.52-45.95 mg/kg,2.61-64.68 mg/kg,and 30.58-85.07 mg/kg,respectively,and their average levels were 0.040,28.50,12.46,and 61.76 mg/kg,respectively.Except for Zn,no significant concentration variations with the seasons were observed for the other three heavy elements.The potential ecological risk assessment indicated that the potential ecological risks of these heavy metals were of high level in summer and moderate level in other seasons.The sequence of the degree of their potential ecological risks was:HgCuPbZn.The potential ecological risk of Hg was of high level and the others were of low level.
【Fund】: 国家自然科学基金资助项目(40773063);; 国家自然科学基金委员会-广东省人民政府自然科学联合基金资助项目(U0633006)
【CateGory Index】: X55
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