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Separation Science and Technology Volume 43, 2008 - Issue 9-10
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Original Articles

Zinc(II) Extraction from Hydrochloric Acid Solutions using Amberlite XAD-7 Impregnated with Cyphos IL 101 (Tetradecyl(Trihexyl)Phosphonium Chloride)

V. Gallardo Universidad de Guanajuato, Instituto de Investigaciones Científicas, Cerro de la Venada S/N, Pueblito de Rocha, C.P. 36040 Guanajuato, Gto, México
,
R. Navarro Universidad de Guanajuato, Instituto de Investigaciones Científicas, Cerro de la Venada S/N, Pueblito de Rocha, C.P. 36040 Guanajuato, Gto, MéxicoCorrespondence[email protected]
,
I. Saucedo Universidad de Guanajuato, Instituto de Investigaciones Científicas, Cerro de la Venada S/N, Pueblito de Rocha, C.P. 36040 Guanajuato, Gto, México
,
M. Ávila Universidad de Guanajuato, Instituto de Investigaciones Científicas, Cerro de la Venada S/N, Pueblito de Rocha, C.P. 36040 Guanajuato, Gto, México
&
E. Guibal Ecole des Mines Alès, Laboratoire Génie de l'Environnement Industriel, 6, avenue de Clavières, Alès cedex, France
Pages 2434-2459 | Received 02 Nov 2007, Accepted 12 Mar 2008, Published online: 06 Aug 2008
 
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Abstract

Cyphos IL 101 (tetradecyl(trihexyl)phosphonium chloride) was immobilized on Amberlite XAD-7. The extractant impregnated resin (EIR) was very efficient at removing Zn(II) from HCl solutions (optimum found between 2 and 4 M HCl). Metal ions were removed as anionic chlorocomplexes (ZnCl4 2−) by ion exchange mechanism. The sorption strongly depended on the Cyphos IL 101 concentration in the EIR. The maximum sorption capacity was close to 20 mg Zn(II) g−1 EIR (i.e. 0.40 mol Zn(II) mol−1 Cyphos IL 101). The uptake kinetics were controlled by intraparticle diffusion (De: 1.2 10−11 − 6 10−11 m2 min−1). Zn(II) can be easily desorbed using a number of eluents (including water and 0.1 M solution of HNO3, H2SO4, and Na2SO4), which maintained performance levels over 5 cycles.

ACKNOWLEDGEMENTS

The authors thank the Franco-Mexican PCP (Post-Graduate Cooperation Program, Ref. PCP 05/06) and CONACyT (Ref. 52961 and U44768-Q) for financial support.

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