| Influence of humic acid on bioavailability of heavy metals in sediments |
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| 作者姓名： | Wenhong FAN Jun CHEN |
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| 作者单位： | Department of Environmental Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China |
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| 摘 要： | The mimetic ocean environment and chemical method were used to research the bioavailability effect of humic acid on five heavy metals in sediment, including Cd, Cu, Zn, Pb and Ni. The sediment was separated into four containers with artificial seawater, and each of them had different concentrations of humic acid. The values of concentrations covered the whole range found in natural sediment （0.1%-10%）. According to the 48 hours LC50 of clam and distribution coefficient, metals were added in artificial seawater, and their speciation was determined at first and then after two days＇ incubation. It was found the bioavailability of heavy metals was reduced in the presence of humic acid. The obvious negative effect on Zn was observed, but the influence on Cd was not remarkable. In addition, the contents of Pb and Ni increased obviously in organic phase, and they are correlative with the concentrations of humic acid.
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| 关 键 词： | 腐殖酸 沉积物 重金属 生物利用率 海水化学 |
Influence of humic acid on bioavailability of heavy metals in sediments |
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| Wenhong FAN Jun CHEN.Influence of humic acid on bioavailability of heavy metals in sediments[J].Chinese Journal of Geochemistry,2006,25(B08):261-261. |
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| Abstract: | |
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| Keywords: | humic acid sediment heavy metal bioavailability |
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