4.2 Article

Fractionation of heavy metals in shallow marine sediments from Jinzhou Bay, China

期刊

JOURNAL OF ENVIRONMENTAL SCIENCES
卷 22, 期 1, 页码 23-31

出版社

SCIENCE PRESS
DOI: 10.1016/S1001-0742(09)60070-X

关键词

heavy metals; sediment pollution; fractionation; Jinzhou Bay; risk assessment

资金

  1. National Basic Research Program (973) of China [2009CB426301]
  2. National Natural Science Foundation of China [40773076, 40703026]

向作者/读者索取更多资源

This work investigated the distribution and speciation of Cd, Cu, Ph, Fe and Mn in the shallow sediments of Jinzhou Bay, Northeast China, which has been heavily contaminated by nonferrous smelting activities. The concentrations of Cd, Cu and Pb in sediments were found to be 100, 13 and 7 times, respectively, being higher than the national guideline (GB 18668-2002). Sequential extraction test showed that 39%-61% of Cd were exchangeable fractions, indicating that Cd in the sediments posed a high risk to local environments. While Cu and Pb were at moderate risk levels. According to the relationships between percentage of metal speciation and total metal concentration, it was concluded that the distributions of Cd, Cu and Pb in some geochemical fractions were dynamic in the process of pollutants migration and the stability of metals in sediments of Jinzhou Bay decreased in the order of Pb > Cu > Cd.

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