| Comparison of components and distribution of heavy metals in sediments, suspended particulate matter and surface coatings in natural waters |
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| 作者姓名： | Deming DONG Yongzheng LU Xiuyi HUA Liang LIU Xiue SHEN |
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| 作者单位： | College of Environment and Resources, Jilin University, Changchun 166226, China |
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| 摘 要： | Solid phases, such as surface coatings （SC）, suspended particulate matter （SPM） and deposited sediments （DS）, contribute to the pool of heavy metals in natural waters. Their existing and forming conditions lead to potential differences in enrichment capacity of pollutants, chemical compositions and crystals. In this study, the contents of heavy metals in SC, SPM and DS were determined by GF-AAS after digestion with a mixture of concentrated HNO3 and HClO4. The selective extraction method was employed to remove Fe, Mn oxides and organic matters and associated heavy metals （Cu, Pb, Zn）. X-ray diffraction analyses were performed to characterize the crystals in the samples. The results showed that no significant difference in the contents of Fe-oxides in DS, SPM and SC was found, but the contents of Mn-oxides and organic matter follow the order of SC〉SPM〉DS. The significant crystal characters were observed in DS, SPM and SC, and the kinds of minerals and crystallization degree follow the order of DS〉SC〉SPM. In addition, quartz was the most important matter of crystals in the solid phases. Enrichment capacity follows the order of SPM〉SC〉DS for Pb, Cu and Zn. Organic matter was the major sorbent for Cu, and Mn oxides and organic matter played an important role in the enrichment of Zn. However, Pb was absorbed mainly by Fe oxides. Moreover, compared with Fe oxides and organic matter, Mn oxides had a great enrichment capacity for these metals. Although DS, SPM and SC were formed in the same water system, contents of chemical components, crystals and enrichment capacities to heavy metals were obviously different.
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| 关 键 词： | 水文化学 沉积物 重金属 微粒物质 |
Comparison of components and distribution of heavy metals in sediments, suspended particulate matter and surface coatings in natural waters |
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| Deming DONG Yongzheng LU Xiuyi HUA Liang LIU Xiue SHEN.Comparison of components and distribution of heavy metals in sediments, suspended particulate matter and surface coatings in natural waters[J].Chinese Journal of Geochemistry,2006,25(B08):200-201. |
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| Abstract: | |
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| Keywords: | sediments suspended particulate matter surface coating heavy metal component |
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