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引用本文:刘恩峰,沈吉,朱育新,夏威岚,朱广伟.太湖表层沉积物重金属元素的来源分析.湖泊科学,2004,16(2):114-120. DOI:10.18307/2004.0203
LIU Enfeng,SHEN Ji,ZHU Yuxin,XIA Weilan,ZHU GuangWei.Source Analysis of Heavy Metals in Surface Sediments of Lake Taihu. J. Lake Sci.2004,16(2):114-120. DOI:10.18307/2004.0203
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太湖表层沉积物重金属元素的来源分析
刘恩峰1,2, 沈吉1, 朱育新1, 夏威岚1, 朱广伟1
1.中国科学院南京地理与湖泊研究所, 南京 210008;2.中国科学院研究生院, 北京 100039
摘要:
根据太湖MS岩芯重金属元素与Al的线性回归分析及元素/Al、V/Al比率散点图变化规律,讨论了太湖沉积物中重金属元素的来源特征。结果表明:20世纪20年代中期以前,重金属元素主要为自然来源;20年代中期—70年代中期,尽管沉积物中Al、Fe、Zn、Mn、V、Cr等重金属元素含量随沉积物粒度变粗而明显下降,但除Hg受到一定程度的人为污染之外,其它重金属元素仍以自然来源为主,物源有所变化;70年代末期以来,沉积物中重金属元素人为污染逐渐加重,Pb、Cu、Zn、Hg、As等元素既有流域母质来源,又受到一定程度的人为污染。
关键词:  太湖  重金属  来源特征
DOI:10.18307/2004.0203
分类号:
基金项目:中国科学院知识创新工程项目(KZCX1-SW-12-Ⅰ);南京地理与湖泊研究所创新项目(CXNIGLAS-A02-05);国家自然科学基金(40203007)联合资助
Source Analysis of Heavy Metals in Surface Sediments of Lake Taihu
LIU Enfeng1,2, SHEN Ji1, ZHU Yuxin1, XIA Weilan1, ZHU GuangWei1
1.Nanjing Institute of Geography & Limnology Chinese Academy of Sciences, Nanjing 210008, P. R. China;2.Craduate School of the Chinese Academy of Sciences, Beijing 100039, P. R. China
Abstract:
Heavy metals of natural and anthropogenic sources are mixed in lake sediments, and it is difficult to discern.Based on linear regression analysis results and element chemical properties, A1 and V are selected as the concentration normalizing elements.The natural and anthropogenic sources contributing to the elemental concentrations in core MS of Lake Taihu are analyzed in terms of element-to-Al ratio versus V-to-Al ratio.Results show that heavy metals were from natural sources before mid 1920s.The heavy metals, such as Al,Fe,Mn,V, Cr, Pb, Cu, Zn and As, were from changed natural sources, and Hg originated from human pollution partly between mid 1920s and 1970s.The heavy metals, such as Pb, Cu, Zn, Hg, As, are contaminated by human pollution since mid 1970s.The source characters of heavy metals are correspondent with the human activities and economic development in Lake Taihu drainage basin.
Key words:  Lake Taihu  heavy metals  source characters
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