| Separation of Organic Dyes from Water by Colloidal Gas Aphrons |
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| 作者姓名： | 黄颖怡 王运东 戴猷元 |
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| 作者单位： | 3 1*3/4]State Key Laboratory of Solvent Extraction，Department of Chemical Engineering，Tsinghua University，Beijing 100084，China |
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| 基金项目： | “98 5” Project of Environm ent Scienceand Engineering Research Institute of Tsinghua
U niversity and the National Natural Science
Foundation of China(Nos. 2 96 76 0 2 1and2 9836 130 ) |
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| 摘 要： | IntroductionColloidal gas aphrons ( CGAs) are dispersions ofvery small microbubbles( usually of diameters inthe range of2 5 1 2 5 μm) distributed in an aqueousmedium. Sebba1] first reported colloidal gasaphrons in 1 971 . Colloidal gas aphrons are gasbu…
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Separation of Organic Dyes from Water by Colloidal Gas Aphrons |
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| HUANG Yingyi,WANG Yundong ,DAI Youyuan BT.Separation of Organic Dyes from Water by Colloidal Gas Aphrons[J].Tsinghua Science and Technology,2002,7(1). |
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| Authors: | HUANG Yingyi WANG Yundong DAI Youyuan [BT |
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| Institution: | HUANG Yingyi,WANG Yundong **,DAI Youyuan [BT |
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| Abstract: | Colloidal gas aphrons (CGAs) are micron-sized gas bubbles produced by stirring surfactant solutions at high speed. A single CGA dispersed in water is composed of a gaseous inner core, surrounded by a double water-soapy layer. CGAs have large interfacial area per unit volume and exhibit relatively high stability. These characteristics make CGAs very suitable in flotation systems. This paper studied the flotation of organic dyes from water using CGAs. The experimental results show that the flotation process may follow four mechanisms, i.e., ion coupling of the oppositely charged species of the surfactant forming the CGA and the organic dye, reactions between CGA and the organic dye, ion-dye complex adsorbed on the surface of CGAs, and hydrophilic or hydrophobic characteristics of the organic dyes. |
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| Keywords: | colloidal gas aphrons (CGAs) flotation organic dye surfactant |
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