Cadmium distribution in sediment profiles of the six main rivers in southern Taiwan.
Cadmium distribution in sediment profiles of the six main rivers in southern Taiwan.
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DOI：
10.1016/j.jhazmat.2007.03.024
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发表时间：
2007-09
影响因子：
13.6
通讯作者：
L. Tsai;Kuang-Chung Yu;S. Ho
中科院分区：
文献类型：
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作者：
L. Tsai;Kuang-Chung Yu;S. Ho
研究了流经台湾南部最大、最发达和污染最严重地区的六条主要河流中镉的动态分布。还对沉积物剖面样品进行了铜、铬、锌、镍、铅、钴、锰、铁、碳酸盐、锰氧化物、铁氧化物和有机质的分析，以表征地球化学环境和识别污染源。在盐水河、额仁河和坡祖河的0-10 cm深度，Cd浓度较高(约3.5 mg/kg)，这与其流域的工业活动历史有关。根据Cd与地球化学组分的线性相关系数(R)，伊仁河中Cd的主要结合相为碳酸盐(r=0.85)，Cd与含铬、镍、铜、锌的Cd来自相同的污染源(r>；0.80)。坡祖河和北康河沉积物中镉的含量可能是由于富铬和富铜(0.54<；r<；0.65)的废弃沉积物所致。在延水河的情况下，只有微弱的迹象表明镉来自含铬、镍、铜、锌和铅的废物(r约0.40)。另一方面，曾文和赤水沉积物中镉的浓度似乎代表了自然背景。总体而言，额仁河和延水河重金属污染较强，而曾文河、坡足河、赤水河和北康河没有发现重要的重金属污染。
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 3.5mg/kg) at depths of 0–10cm 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.