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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Electrodialysis for concentrating cobalt, chromium, manganese, and magnesium from a synthetic solution based on a nickel laterite processing route

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Author(s):
Feijoo, G. C. [1] ; Barros, K. S. [1, 2, 3] ; Scarazzato, T. [2] ; Espinosa, D. C. R. [1]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo, Dept Chem Engn, Av Prof Lineu Prestes 580, Bloco 18 Conjunto Quim, BR-05434070 Sao Paulo, SP - Brazil
[2] Fed Univ Rio Grande Do Sul UFRGS, Dept Mat Engn, Av Bento Goncalves 9500, BR-91501970 Porto Alegre, RS - Brazil
[3] Univ Politecn Valencia UPV, ISIRYM, IEC Grp, Cami Vera S-N 46022, POB 22012, E-46071 Valencia - Spain
Total Affiliations: 3
Document type: Journal article
Source: Separation and Purification Technology; v. 275, NOV 15 2021.
Web of Science Citations: 0
Abstract

Due to environmental and human health concerns, the need for cleaner techniques able to extract and recover metals from mining process solutions has been increasing. In this work, the use of electrodialysis for recovering cobalt, magnesium, manganese, and chromium ions from an acid multicomponent solution generated in the nickel laterite processing was evaluated. Values of percent extraction above 98% were obtained for Co2+, Mn2+, and Mg(2+ )ions. For Cr3+, the greatest percent extraction obtained was 83%. The results of percent concentration of the species showed the same trend: for Cr3+ ions, it was significantly lower than the others. Such difference in the transport of the metals through the membranes may have occurred due to the lower molar concentration, lower diffusion coefficient, and greater Stokes radius of chromium ions. Thus, the transfer of Cr3+ was hindered by the presence of other cationic species. This was also evidenced by the results of current efficiency and energy consumption associated with each species in solution. Lastly, the results of solution pH throughout the experiments and the final condition of the membranes, which were analyzed by SEM/EDS, indicated that the water dissociation phenomenon occurred at their surfaces. (AU)

FAPESP's process: 12/51871-9 - Study Center for Technology in Waste Solid Treatment and Recycling - SCTWSTR
Grantee:Jorge Alberto Soares Tenório
Support Opportunities: Research Projects - Thematic Grants