Heavy metals in Changjiang estuarine and offshore sediments:responding to human activities

查看全文 作　　者：DONG [1,2]Aiguo;ZHAI [1,2]Shikui;Matthias [3]Zabel;YU [1,2]Zenghui;ZHANG [1,2]Huaijing;LIU [1]Feifei

机构地区：[1]College of Marine Geoscience,Ocean University of China,Qingdao 266100,China;[2]Key Laboratory of Submarine Geosciences and Prospecting Techniques,Ministry of Education,Ocean University of China,Qingdao 266100,China;[3]Fachbereich Geowissenschaften,Universitat Bremen,Postfach 330440,D-28334 Bremen,Germany

出　　处：《Acta Oceanologica Sinica》索引2012年第31卷第2期,共14页

基　　金：The National Natural Science Foundation of China under contract No.41076022;the National Basic Research Program of China under contract No.2002CB412400 摘　　要：The Changjiang (Yangtze) estuarine and offshore sediments were analyzed for total heavy metals concentrations and chemical fractions.Distributions of heavy metals show typical banded diffusion pattern,with high concentrations near the river mouth and following a decreasing trend in the offshore direction.According to chemical fractions,Fe/Mn oxide fraction is the major non-residual fraction in the Changjiang estuarine and offshore sediments.Higher percentage of non-residual fraction of Pb implies that,the industrial contaminations transported via the atmosphere and river input,may affect the non-residual fraction of heavy metals.Over past fifteen years,the concentration of Pb normalizing to Al presents significant increasing trend,corresponding to the effect of human activities.By comparison of heavy metals fractions in 2003 to 2006,it has been realized that increasing water and sediment may cause a higher percentage non-residual fraction of Cu in the southern part of offshore muddy sediments. 关键词：近海沉积物重金属含量长江河口人类活动氧化物含量重金属残留泥质沉积物无残留

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Heavy metals in Changjiang estuarine and offshore sediments:responding to human activities

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