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《Geochimica》 2008-05
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Heavy metal distribution and their influence factors in sediments of Yalu River Estuary and its adjacent sea area

GAO Jian-hua1,LI Jun2,WANG Zhen-yan3,WANG Ya-ping1,BAI Feng-long2 and CHENG Yan4 1.Key Laboratory of Coast and Island Development of Ministry of Education,Nanjing University,Nanjing 210093,China;2.Qingdao Institute of Marine Geology,Qingdao 266071,China;3.Key Laboratory of Marine Geology and Environment of Chinese Academy of Sciences,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266003,China;4.School of Urban Construction,East Liaoning University,Dandong 118003,China  
Characteristics of heavy metal distributions in sediments of different areas in the Yalu River Estuary are analyzed,and vertical burial fluxes of heavy metals in different time are calculated.Then,influences of hydro-dynamics of estuary on heavy metal distributions are discussed.Lastly,heavy metal pollution and potential ecological risk coefficients in surface sediments of the Yalu River Estuary are appraised.The results indicate that from 1920s to 2006,concentrations and burial fluxes of Cr,Ni,Zn,Cd,Pb,As and Hg were gradually increasing,whereas those of Cu were gradually decreasing.Heavy metal pollution in the Yalu River Estuary was heavy to very heavy,and the sediments in west channel are characterized by the most serious heavy metal pollution and the highest potential ecological risk coefficient in the whole Yalu River Estuary,therefore the eco-environment of the Yalu River Estuary was seriously endangered by heavy metal pollution.Grain size control effect was not the main factor that influenced distributions of heavy metals.Hydrodynamics of turbidity maxima was the main reason that high concentration of heavy metals(except Cu)corresponded to high suspended sediment concentration in the middle channel of the Yalu River Estuary.
【Fund】: 国家自然科学基金(40506022 40506013);; 教育部新世纪优秀人才支持计划(NCET-06-0446);; 江苏省六大人才高峰(2006027)
【CateGory Index】: X522
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