Hydrometallurgical separation of copper and cobalt from lithium-ion batteries using aqueous two-phase systems.

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dc.contributor.authorLeite, Daniela da Silveira
dc.contributor.authorCarvalho, Pablo Luis Gutierrez
dc.contributor.authorLemos, Leandro Rodrigues de
dc.contributor.authorMageste, Aparecida Barbosa
dc.contributor.authorRodrigues, Guilherme Dias
dc.date.accessioned2018-03-23T18:42:22Z
dc.date.available2018-03-23T18:42:22Z
dc.date.issued2017
dc.description.abstractA new green hydrometallurgical method was developed for the selective extraction of copper and cobalt from spent lithium-ion batteries, using an aqueous two-phase system (ATPS) extraction technique. The method was optimized for the extraction of Cu(II) and Co(II), considering the influence of the following parameters: type and concentration of extractant (1-(2-pyridyl-azo)-2-naphthol (PAN), 1-nitroso-2-naphthol (1N2N), or bis(2,4,4-trimethylpentyl) phosphinic acid (Cyanex 272)); pH (1.00, 6.00, or 11.0); ATPS-forming electrolyte (Na2SO4 or Na3C6H5O7); tie-line length (TLL) of the system; and mass ratio of the top and bottom phases (mTP/mBP). The recovery efficiency was evaluated in terms of the extraction percentage (%E) and the separation factor (S) between copper and cobalt. The best conditions for selective extraction were achieved using an ATPS composed of L64+Na2SO4+H2O,with pH=6.00, TLL=50.3% (w/w),mTP/mBP=1, and PAN as the extracting agent, which resulted in βCu,Co=3.22×102. The method was subsequently applied to a real lithium-ion battery sample, previously leached with HCl and HNO3. Improved separation of copper and cobalt was achieved using successive extraction steps, resulting in βCu,Co=5.40×105. A stripping assaywas also performed, and after a single step, 70.5% of the copper was available for an electrowinning processpt_BR
dc.identifier.citationLEITE, D. S. et al. Hydrometallurgical separation of copper and cobalt from lithium-ion batteries using aqueous two-phase systems. Hydrometallurgy, v. 169, p. 245-252, 2017. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0304386X16303644>. Acesso em: 15 set. 2017.pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.hydromet.2017.01.002
dc.identifier.issn0304-386X
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/9731
dc.identifier.uri2http://www.sciencedirect.com/science/article/pii/S0304386X16303644pt_BR
dc.language.isoen_USpt_BR
dc.rightsrestritopt_BR
dc.subjectLiquid-liquid extractionpt_BR
dc.titleHydrometallurgical separation of copper and cobalt from lithium-ion batteries using aqueous two-phase systems.pt_BR
dc.typeArtigo publicado em periodicopt_BR
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