| Flocculation process of fine-grained sediments by the combined effect of salinity and humus in the Changjiang Estuary |
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| 作者姓名： | LIU Qizhen LI Jiuf DAI Zhijun LI Daoji |
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| 作者单位： | LIU Qizhen1*，LI Jiufa1，DAI Zhijun1，LI Daoji11.State Key Laboratory of Estuarine and Coastal Research，East China Normal University，Shanghai 200062，China |
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| 基金项目： | 国家自然科学基金
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国家重点基础研究发展计划(973计划)
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The Shanghai Science and Technology Development Funds |
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| 摘 要： | 1 IntroductionThe flocculation of fine-grained particles is onof the main reasons for the estuarine depositionWith the combination of salt water and freshwaterfine-grained particles in estuaries will experiencdrastic changes: flocculation, settlement, res…
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| 关 键 词： | 长江入海口 细粒沉积物 盐度 腐殖质 絮凝过程 组合效应 河口 |
| 收稿时间： | 2006-05-03 |
| 修稿时间： | 2006-11-13 |
Flocculation process of fine-grained sediments by the combined effect of salinity and humus in the Changjiang Estuary |
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| LIU Qizhen,LI Jiuf,DAI Zhijun,LI Daoji.Flocculation process of fine-grained sediments by the combined effect of salinity and humus in the Changjiang Estuary[J].Acta Oceanologica Sinica,2007,26(1):140-149. |
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| Authors: | LIU Qizhen LI Jiuf DAI Zhijun and LI Daoji |
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| Institution: | State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China |
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| Abstract: | For the great amount of organic compounds and the variation of salinity in the Changjiang Estuary, the study on the flocculation process of fine-grained sediments by the combined effect of salinity and humus in the high-turbid system is of critical significance for the understanding of the mechanism of the formation of the turbidity maximum (TM) .For the great amount of organic compounds and the variation of salinity in the Changjiang Estuary, the study on the flocculation process of fine-grained sediments by the combined effect of salinity and humus in the high-turbid system is of critical significance for the understanding of the mechanism of the formation of the turbidity maximum (TM) .The effects of salinity and humus on the fine-grained sediments have been analyzed through the synthetic study of the aspects of flocculation/coagulation power (F), diameter (D) and zeta potential (Z). And the microcosmic configuration of the flocs has been analyzed by using a scan electron microscope and Fourier Transform Infrared Spectrometry. The results show that: (1) with the increase of salinity, F and D become greater and Z becomes smaller, and with the increase of the concentration of humus, F becomes smaller, but D and Z become greater; (2) the microcosmic configuration of the flocculation shows that humus packs on the fine sediments in the form of salt, and the flocculation model of C-P-OM (C stands for clay; P cations; OM organic materials) can successfully demonstrate the mechanism of the formation of the fine-grained sediments in the high-turbid area of the Changjiang Estuary. |
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| Keywords: | Changjiang Estuary fine-grained sediment flocculation salinity |
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