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Sorption of electrochemically generated V(IV) on a
Cation Exchanger and its Separation from W
Authors: Jana Ďurišováa,
Joana Sousab, Luděk Jelíneka
Affiliation: aDepartment of
Power Engineering, ICT Prague, Czech Republic bFaculty of
Engineering, University of Porto, Portugal
Published in:
Ion Exch. Lett. 2010,
2(3), 35-37
Permanent link to this page: http://iel.vscht.cz/abstracts/1803-4039-02-0035.htm
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Keywords: vanadyl; quadrivalent vanadium;
tungsten; ion exchange; separation
Abstract: The sorption of V(IV) onto a strong cation exchanger was investigated from a solutions containing sodium cations and tungsten. V(V) was reduced to V(IV) on a carbon felt cathode at a constant potential of -1500 mV vs. Ag/AgCl. V(IV) was completely captured by the cation exchanger in presence of Na+ ions. The breakthrough capacity was 0.63 mol vanadium/L. In presence of W, a high leakage of V(IV) occurred. Formation of mixed V(IV)/W heteropolyanions is considered. W was not taken up by the cation exchanger. V(IV) was released from the cation exchanger with 1 M HCl within 15 BV and a concentrated solution of average 2.2 g vanadium/L was obtained.