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Selective extraction of zinc and iron from passivating baths

Abstract: In this work, the viability study of the removal of zinc and iron from chromium (III) passivating baths is presented. The Emulsion Pertraction Technology (EPT), a liquid-liquid extraction process performed in membrane contactors has been applied. Real passivating baths with the following metal concentrations have been tested: Zn, 7000 mg/L; Fe, 30 mg/L and Cr, 5500 mg/L respectively. After the EPT treatment and at the applied experimental conditions, these concentrations were decreased to 2450 mg/L of Zn and 4 mg/L of Fe, while the chromium concentration was maintained approximately at the initial value. The EPT process allowed the simultaneous recovery of Zn in a concentrated stripping phase. The influence of the pH of the feed phase strongly affected the kinetics of metals removal. A value of pH = 2.5 allowed to attain the required high selectivity values of -Zn/Cr.

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Authorship: Mediavilla R., Ortiz I., Urtiaga A.,

Fuente: Desalination, 2010, 250(3), 1014-1015

Publisher: Elsevier

Publication date: 30/01/2010

No. of pages: 2

Publication type: Artículo de Revista

DOI: 10.1016/j.desal.2009.09.094

ISSN: 0011-9164

Spanish project: CTM2006-00317

Publication Url: https://doi.org/10.1016/j.desal.2009.09.094

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Authorship

ROSA MEDIAVILLA MARTIN

INMACULADA ORTIZ URIBE

ANA MARIA URTIAGA MENDIA

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