Dissolved trace elements and heavy metals from the shallow lakes in the middle and lower reaches of the Yangtze River region, China
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- 作者：Hui Liu (13)
Wei Li (124) liwei@wbgcas.cn - 关键词：Trace elements – ; Heavy metals – ; Spatial distribution – ; Shallow lakes – ; Yangtze River
- 刊名：Environmental Earth Sciences
- 出版时间：April 2011
- 出版年：2011
- 期刊代码：67_1866-6299
- 类别：ear
- 卷：62
- 期：7
- 页码：1503-1511
- 数据来源：sp
摘要
Dissolved trace elements and heavy metals of waters and sediments in the ten shallow lakes in the middle and lower reaches of the Yangtze River region were determined to identify their composition and spatial distribution, and to assess the extent of their environmentally detrimental effects by comparison with water and sediment quality guidelines. Results indicated that As and Pb were the main pollutants in lake waters and Mn and Hg the potential ones, while As, Cu and Pb were the main pollutants in lake sediments. Their spatial distribution indicated that Daye Lake was seriously polluted by metals, which was corroborated by cluster analysis. Higher concentrations of trace elements have been found in lakes downstream of the Yangtze River delta, and higher concentrations of metals have been recorded in sediments of upstream lakes, suggesting that metals in water were more sensitive to anthropogenic activities and that metals in sediment were mainly controlled by minerals. Correlation analyses demonstrated that there were stronger associations among metals in lake sediments than those in lake waters, and their good relationships suggested the common sources. Further research on the subject will help develop water quality management with the aim of restoring shallow lakes in the Yangtze River.