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Issue 33, 2019
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Recovery of cobalt from dilute aqueous solutions using activated carbon–alginate composite spheres impregnated with Cyanex 272

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Abstract

A novel adsorbent was designed for selective recovery of cobalt(II) from synthetic binary cobalt(II)–nickel(II) and cobalt(II)–manganese(II) solutions, a synthetic multi-element solution and a real aqueous waste stream from the petrochemical sector. The adsorbent consisted of shaped activated carbon–alginate spheres impregnated with Cyanex 272. The synthesis was followed by characterisation using SEM, infrared spectroscopy, BET analysis and elemental analysis. Good selectivity for cobalt(II) over nickel(II) could be achieved during adsorption, while this was not the case for cobalt(II) over manganese(II). Cobalt(II) and manganese(II) were therefore fully adsorbed and stripped using a dilute sulphuric acid solution. The adsorbent was shown to be reusable in a column setup. Finally, the adsorbent material was used for the purification of a real aqueous waste stream from the petrochemical sector.

Graphical abstract: Recovery of cobalt from dilute aqueous solutions using activated carbon–alginate composite spheres impregnated with Cyanex 272

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Supplementary files

Article information


Submitted
27 Mar 2019
Accepted
09 Jun 2019
First published
14 Jun 2019

This article is Open Access

RSC Adv., 2019,9, 18734-18746
Article type
Paper

Recovery of cobalt from dilute aqueous solutions using activated carbon–alginate composite spheres impregnated with Cyanex 272

S. Van Roosendael, B. Onghena, J. Roosen, B. Michielsen, K. Wyns, S. Mullens and K. Binnemans, RSC Adv., 2019, 9, 18734
DOI: 10.1039/C9RA02344E

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