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。
Heavy metals of natural and anthropogenic sources are mixed in lake sediments, and it is dif-
ficult to discern. Based on linear regression analysis results and element chemical properties, Al
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 hu-
man activities and economic development in Lake Taihu drainage basin.
出处
《湖泊科学》
EI
CAS
CSCD
2004年第2期113-119,共7页
Journal of Lake Sciences
基金
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
