1. The trend and extent of heavy metal accumulation over last one hundred years in the Liaodong Bay, China.
- Author
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Xu B, Yang X, Gu Z, Zhang Y, Chen Y, and Lv Y
- Subjects
- Cadmium analysis, Cadmium history, China, Environmental Monitoring, History, 19th Century, History, 20th Century, Lead analysis, Lead history, Lead Radioisotopes analysis, Mercury analysis, Mercury history, Metals, Heavy history, Oceans and Seas, Time Factors, Water Pollutants history, Zinc analysis, Zinc history, Geologic Sediments analysis, Metals, Heavy analysis, Water Pollutants analysis
- Abstract
An integrated analysis has been carried out on two cores dated by combination of (210)Pb and (137)Cs in order to characterize the extent of heavy metal accumulation in the Liaodong Bay, Northern China. The concentrations and burial fluxes of Zn, Pb, Cd, and Hg increased abruptly after late 1970s. The enrichment factors of Cd, Hg, Zn and Pb are more than 30, 10, 7, and 3.5, respectively, in the surface sediments. Coincident to the increase of heavy metal contents, the decreasing trend of (206)Pb/(207)Pb ratio indicated lead in the surface sediments mainly come from anthropogenic activities.
- Published
- 2009
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