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	Geochemical baselines of heavy metals in the sediments of two large freshwater lakes in China: implications for contamination character and history
	Wei C. Y. ; Wen H. L.
	2012
关键词	Contamination Dianchi Normalization Cumulative frequency Taihu reference element trace-elements south-africa eastern enrichment taihu estuaries aluminum quality florida
英文摘要	The aim of this study was to estimate the geochemical baseline concentrations of various heavy metals in the surface sediments of two large freshwater lakes in Taihu and Dianchi, China, and to assess the character and history of heavy metal contamination around the two lakes. Heavy metal concentrations in the sediments were obtained by field surveys and were supplemented with published data. The statistical methods of cumulative frequency and normalization were employed to obtain the baselines. The respective baseline concentrations for As, Sb, Hg, Co, Cr, Cu, Ni, Pb and Zn were 9.92, 1.67, 0.14, 22.62, 100.56, 31.63, 31.97, 33.05 and 97.01 mg/kg, respectively, in Taihu, and 24.60, 4.29, 0.25, 36.78, 135.68, 90.05, 50.76, 73.56 and 208.76 mg/kg, respectively, in Dianchi. The baseline concentrations of these heavy metals in Lake Taihu were equivalent to the pre-industrial concentrations determined from lakes in Sweden and Europe. Conversely, those in Lake Dianchi were much higher than the pre-industrial values. Li, Fe, Sc, Ti, V and Al were found to be the suitable reference elements for normalization, and one of these elements could be used to predict the baseline concentrations of heavy metals except Hg. Most of the heavy metals had one inflexion, and only Cu and Pb in Taihu, Sb, Pb and Zn in Dianchi, were found to have two inflexions in the cumulative curves, suggesting remarkable anthropogenic inputs of Cu and Pb in Taihu, Sb, Pb and Zn in Dianchi, which are generally consistent with the respective industrial structure around Taihu and Dianchi.
出处	Environmental Geochemistry and Health
卷	34
期	6
页	737-748
收录类别	SCI
语种	英语
ISSN号	0269-4042
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/30730]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Wei C. Y.,Wen H. L.. Geochemical baselines of heavy metals in the sediments of two large freshwater lakes in China: implications for contamination character and history. 2012.

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