Cadmium distribution in sediment profiles of the six main rivers in southern Taiwan

doi:10.1016/j.jhazmat.2007.03.024

CNU IR > College of Sustainable Environment and Recreation > Dept. of Occupational Safety > Periodical Articles > Item 310902800/22246

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题名:	Cadmium distribution in sediment profiles of the six main rivers in southern Taiwan
作者:	Li-jyur Tsai Kuang-chung Yu Shien-Tsong Ho
贡献者:	職業安全衛生系環境工程與科學系溫泉產業研究所
关键词:	Cadmium Heavy metals Sediment profile River Taiwan
日期:	2007-09
上传时间:	2010-01-15 11:24:59 (UTC+8)
摘要:	Dynamic cadmium distribution has been studied in six main rivers flowing through the largest, most highly developed and polluted area of southern Taiwan. Sediment profile samples were also analyzed for Cu, Cr, Zn, Ni, Pb, Co, Mn, Fe, carbonates, Mn-oxides, Fe-oxides and organic matter in order to characterize the geochemical environment and to identify the pollutant sources. Higher Cd concentrations (about 3.5 mg/kg) at depths of 0–10 cm have been detected in the samples of Yenshui, Ell-ren and Potzu rivers, associated to the history of industrial activity in their catchments. According to the linear correlation coefficient (r) between Cd and the geochemical components, carbonates are the primary Cd binding phase in the Ell-ren river (r = 0.85), and Cd comes from the same pollutant sources of those containing Cr, Ni, Cu and Zn (r > 0.80). Cadmium concentration in the Potzu and Peikang river sediments is probably due to waste deposits rich in Cr and Cu (0.54 < r < 0.65). In the case of the Yenshui river, there is only a weak indication that cadmium derives from waste material containing Cr, Ni, Cu, Zn, and Pb (r around 0.40). On the other hand, in the Tsengwen and Chishui sediments cadmium concentrations seem to represent natural background. Generally, the Ell-ren and Yenshui rivers show strong heavy metal pollution, while no important heavy metal contamination has been found in the Tsengwen, Potzu, Chishui, and Peikang rivers.
關聯:	Journal of Hazardous Materials 148(3)： p.630-639
显示于类别:	[Dept. of Occupational Safety] Periodical Articles [Dept. of Environmental Engineering and Science (including master's program)] Periodical Articles [Dept. of Tourism Management] Periodical Articles

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