Recovery of Сobalt(II) by Hybrid Liquid Membrane - Electrodialysis – Electrolysis Process
Electrochimica Acta 2014
Tatiana Sadyrbaeva

A novel method for cobalt(II) recovery from acidic solutions is presented. The extraction of cobalt(II) ions using the bulk liquid membrane during a galvanostatic electrodialysis-electrolysis process was studied. Solutions of di (2-ethylhexyl) phosphoric acid with admixtures of tri-n-octylamine in 1,2-dichloroethane were used as liquid membranes. Effects of current density (2.1 – 5.7 mА∙сm-2) , cobalt(II) concentration (1∙10-3 – 0.05 mol∙L−1) and acid concentration (1∙10-3 – 0.1 M) in the feed solution, carrier concentration in the liquid membrane (5 – 50 vol %), of the type and concentration of acid (1∙10-3 – 2.5 ∙10-2 M) in the cathodic solution were studied, and optimal conditions were determined. Under the optimal conditions it was possible to extract > 99% of cobalt(II) from the acidic feed solution containing 0.01 mol∙L-1 CoSO4. A possibility of effective (> 75 %) transfer of cobalt(II) into dilute solutions of perchloric, sulphuric, hydrochloric and nitric acids was demonstrated. Adherent, compact cobalt electrodeposits with a fine-grained structure were obtained in the studied systems.


Atslēgas vārdi
Liquid membrane, Cobalt, Di(2-ethylhexyl)phosphoric acid, Electrodialysis, Electrodepositon
DOI
10.1016/j.electacta.2014.04.025
Hipersaite
https://www.sciencedirect.com/science/article/pii/S0013468614007609

Sadyrbaeva, T. Recovery of Сobalt(II) by Hybrid Liquid Membrane - Electrodialysis – Electrolysis Process. Electrochimica Acta, 2014, Vol.133, 161.-168.lpp. ISSN 0013-4686. Pieejams: doi:10.1016/j.electacta.2014.04.025

Publikācijas valoda
English (en)
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