Determination of Point of Zero Charge of Tunisian Kaolinites by Potentiometric and Mass Titration Methods

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	Determination of Point of Zero Charge of Tunisian Kaolinites by Potentiometric and Mass Titration Methods
	A. Kriaa N. Hamdib and E. Srasra
发表期刊	Journal of the Chinese Chemical Society,
ISSN	0009-4536
	2008
卷号	55 页码:53-61
关键词	Kaolinite Mass Titration Potentiometric Titration Point Of Zero Net Proton Charge Proton Surface Charge.
英文摘要	This paper deals with determining points of zero charge of natural and Na+-saturated mineral kaolinites using two methods: (1) acid-base potentiometric titration was employed to obtain the adsorption of H+ and OH- on amphoteric surfaces in solutions of varying ionic strengths in order to determinate graphically the point of zero net proton charge (PZNPC) defined equally as point of zero salt effect (PZSE); (2) mass titration curve at different electrolyte concentrations in order to estimate PZNPCs by interpolation and to compare with those determined by potentiometric titrations. The two methods involved points of zero charge approximately similar for the two kaolinites between 6.5-7.8, comparable to those reported previously and were in the range expected for these clay minerals. The comparison of potentiometric surface titration curves obtained at 25 °C and those published in the literature reveals significant discrepancies both in the shape and in the pH of PZNPCs values.
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/3199
专题	科研共享资源
推荐引用方式 GB/T 7714	A. Kriaa N. Hamdib and E. Srasra. Determination of Point of Zero Charge of Tunisian Kaolinites by Potentiometric and Mass Titration Methods[J]. Journal of the Chinese Chemical Society,,2008,55:53-61.
APA	A. Kriaa N. Hamdib and E. Srasra.(2008).Determination of Point of Zero Charge of Tunisian Kaolinites by Potentiometric and Mass Titration Methods.Journal of the Chinese Chemical Society,,55,53-61.
MLA	A. Kriaa N. Hamdib and E. Srasra."Determination of Point of Zero Charge of Tunisian Kaolinites by Potentiometric and Mass Titration Methods".Journal of the Chinese Chemical Society, 55(2008):53-61.

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