Heavy Metals in the Surface Sediments in Lanzhou Reach of Yellow River, China
Heavy Metals in the Surface Sediments in Lanzhou Reach of Yellow River, China
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DOI：
10.1007/s00128-008-9563-x
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发表时间：
2009-01-01
影响因子：
2.7
通讯作者：
Dai, Mingxin
中科院分区：
文献类型：
--
作者：
Liu, Changbing;Xu, Jian;Dai, Mingxin
采用电感耦合等离子体-原子发射光谱法（ICP-AES）对黄河兰州段表层沉积物中砷（As）、铅（Pb）、锌（Zn）、铬（Cr）、铜（Cu）、锰（Mn）等重金属污染及其形态进行了监测。沉积物平均浓度（μ g/g干重）范围为13.68-48.11（As）、26.39-77.66（Pb）、89.80-201.88（Zn）、41.49-128.30（Cr）、29.72-102.22（Cu）和773.23-1459.69（Mn）。空间分布表明，各重金属浓度在该河段基本保持恒定。相关系数表明，金属没有强烈的相关性与沉积物中的砂粒含量或有机碳含量（f（oc））。不稳定组分（交换态+碳酸盐+铁锰氧化物）与含沙量和f（oc）均无显著相关性。本研究的结果有助于了解重金属在湍急河流沉积物环境中的分布。
The heavy metal pollution and their fractionations in the surface sediments of Yellow River in Lanzhou Reach was monitored for arsenic (As), lead (Pb), Zinc (Zn), chromium (Cr), copper (Cu) and manganese (Mn) with Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES). The mean sediment concentrations (in mu g/g dry weight) ranged from 13.68-48.11 (As), 26.39-77.66 (Pb), 89.80-201.88 (Zn), 41.49-128.30 (Cr), 29.72-102.22 (Cu), and 773.23-1459.69 (Mn). Spatial distribution showed that each heavy metal concentration remained almost constant in this reach. Correlation coefficients indicated that metals were not strongly associated with sediment sand content or organic carbon content (f(oc)). Labile fractions (exchangeable + carbonate + Fe-Mn oxide) had no significant correlations with sand content or f(oc), either. Results from the present study are useful for understanding heavy metal distributions in a torrential river sediment environment.