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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/22246

    標題: Cadmium distribution in sediment profiles of the six main rivers in southern Taiwan
    作者: Li-jyur Tsai
    Kuang-chung Yu
    Shien-Tsong Ho
    貢獻者: 職業安全衛生系
    關鍵字: Cadmium
    Heavy metals
    Sediment profile
    日期: 2007-09
    上傳時間: 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
    Appears in Collections:[職業安全衛生系(含防災所)] 期刊論文
    [環境工程與科學系(所)] 期刊論文
    [觀光事業管理系(含溫泉所)] 期刊論文

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