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Separation Science and Technology Volume 46, 2011 - Issue 6
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EXTRACTION

Interfacial Behavior of Cyanex 272 and Mass Transfer Kinetics of Ytterbium Using the Constant Interfacial Area Cell

Ying Xiong College of Chemistry, Liaoning University, Shenyang, Liaoning, P.R. China; State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, P.R. China
,
Weiwei Wang State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, P.R. China
,
Jingqun Gao College of Chemistry, Liaoning University, Shenyang, Liaoning, P.R. China
,
Shulan Meng State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, P.R. China
,
Deqian Li State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, P.R. ChinaCorrespondence[email protected]
&
Dongbei Wu Department of Chemistry, Tongji University, P.R. China
Pages 959-964 | Received 11 Mar 2010, Accepted 16 Nov 2010, Published online: 15 Apr 2011
 
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Abstract

The interfacial behavior of Cyanex 272 has been investigated using the Du Nouy ring method. Different adsorption isotherms such as the Gibbs and Szyszkowski isotherms have been found as fitting well to the experimental data. The values of interfacial excess at the saturated interface increase in the following order: n-heptane > cyclohexane > CCl4 > toluene > benzene > chloroform, explained according to the stronger solution effect of aromatic hydrocarbon. The effects of temperature, acidity, and ionic strength of the aqueous phase on the interfacial activity of Cyanex 272 are also examined and explained in detail. Moreover, the reaction orders against Cyanex 272 predicted from the interfacial tension isotherms are in agreement with the order determined experimentally, which suggests that the interfacial activity of Cyanex 272 can provide enough strong evidence quantitatively supporting the interfacial mechanism.

ACKNOWLEDGEMENTS

This project was supported by National Natural Science Foundation of China (20701017, 20706045) and National “863”project (2002AA647070).

Notes

*Aqueous phase: 1.0 mol/L (Na, H)Cl, pH = 2.79, 294 K.

*Aqueous phase: 1.0 mol/L (Na, H)Cl, 294 K.

*Aqueous phase: 1.0 mol/L (Na, H)Cl, pH = 2.79.

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