Green selective recovery of lanthanum from Ni-MH battery leachate using aqueous two-phase systems.

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorOliveira, Wbiratan Cesar Macedo de-
Autor(es): dc.creatorRodrigues, Guilherme Dias-
Autor(es): dc.creatorMageste, Aparecida Barbosa-
Autor(es): dc.creatorLemos, Leandro Rodrigues de-
Data de aceite: dc.date.accessioned2025-08-21T15:06:22Z-
Data de disponibilização: dc.date.available2025-08-21T15:06:22Z-
Data de envio: dc.date.issued2018-03-13-
Data de envio: dc.date.issued2018-03-13-
Data de envio: dc.date.issued2017-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/handle/123456789/9597-
Fonte completa do material: dc.identifierhttps://doi.org/10.1016/j.cej.2017.04.044-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1002509-
Descrição: dc.descriptionIn view of the importance of resource recycling and the use of environmentally safe systems to extract the metals contained in wastes, the present study concerns the extraction/separation of lanthanum from spent Ni–MH batteries. Investigation was made of the extraction behavior of lanthanum using aqueous twophase systems (ATPSs), and a new environmentally safe hydrometallurgical method was developed for the selective extraction of La from Ni-MH battery leachate. The extraction behavior of La was evaluated considering the influence of the following parameters: concentration of different extractant; pH; ATPS-forming electrolyte (Li2SO4, Na2SO4, MgSO4, Na2C4H4O6, or Na3C6H5O7); ATPS-forming polymer (L64 or PEO1500). The recovery efficiency was evaluated by analyzing the extraction percentage (%E), and the best conditions for analyte extraction were achieved using the ATPS formed by PEO1500 + Li2SO4, at pH 6.00, with 1,10-phenanthroline as the extractant agent (%E = 74.1%). The method was applied to a real Ni-MH battery leachate. After three successive extraction steps, high separation factor (S) values were obtained for the separation of lanthanum from concomitant metals (SLa,Ce = 180; SLa,Pr = 184; SLa,Nd = 185).Astripping assay was carried out, and after a single step, 88.5% of the lanthanum was available for a possible electrowinning step.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsaberto-
Direitos: dc.rightsO periódico Chemical Engineering Journal concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 4210810195943.-
Palavras-chave: dc.subjectAqueous two-phase systems-
Palavras-chave: dc.subjectLanthanum-
Palavras-chave: dc.subjectHydrometallurgy-
Palavras-chave: dc.subjectGreen chemistry-
Título: dc.titleGreen selective recovery of lanthanum from Ni-MH battery leachate using aqueous two-phase systems.-
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