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首页> 外文会议>Second International Conference on Estuaries and Coasts vol.1; 第二届河口海岸国际研讨会论文集 >FLOCCULATION AND COAGULATION CHARACTERISTICS OF FINE-GRAINED SEDIMENTS IN HIGH-TURBID AREA OF THE CHANGJIANG ESTUARY
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FLOCCULATION AND COAGULATION CHARACTERISTICS OF FINE-GRAINED SEDIMENTS IN HIGH-TURBID AREA OF THE CHANGJIANG ESTUARY

机译：长江口高湍流区细颗粒沉积物的絮凝与凝结特征

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摘要

For the great amount of organic compounds and the variation of salinity in Changjiang Estuary, the study on the complex flocculation of fine-grained sediments in the high-turbid system is of critical significance in the understanding of the mechanism of the formation of TM(the turbidity maximum). In this paper, the effects of different kinds of inorganic salts and organic compounds on the fine-grained sediments have been analyzed through the synthetic study of the aspects of flocculation/coagulation power (F), floe diameter (D) and Zeta potential (Z). And the microcosmic configuration of the floes has been analyzed by using Scan Electron Microscope (SEM). The results show that: 1) the coagulation power curves showed increasing trends with increasing concentrations of aluminum, magnesium and sodium ions, respectively. And with increasing concentrations of these three kinds of ion, the zeta potential of floes decrease and the floe size increase; 2) in organic flocculants, CTAB is more effective on the suspension when compared to humic acid and BRIJ; 3) enhanced flocculation is occurred in the complex flocculation by the pre-addition of magnesium ion and sodium ions, compared to these ions exist alone, while aluminum ion is to the contrary.
机译：鉴于长江口中大量的有机物和盐分变化，研究高浊度系统中细颗粒沉积物的复杂絮凝作用对于理解TM的形成机理具有重要意义。浊度最大）。通过对絮凝/凝聚力（F），絮凝直径（D）和Zeta电位（Z）等方面的综合研究，分析了各种无机盐和有机化合物对细颗粒沉积物的影响。 ）。并使用扫描电子显微镜（SEM）分析了絮凝物的微观结构。结果表明：1）随着铝，镁和钠离子浓度的增加，混凝能力曲线呈增加趋势。随着这三种离子浓度的增加，絮凝物的ζ电势降低，絮凝物尺寸增加； 2）在有机絮凝剂中，与腐殖酸和BRIJ相比，CTAB对悬浮液更有效； 3）与单独存在的镁离子和钠离子相比，在复杂的絮凝中，通过预先添加镁离子和钠离子，会增强絮凝作用。

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