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Processing of spent Ni-MH batteries for the recovery of cobalt, nickel and rare earth elements bearing materials by means of a chemical and electrochemical sequential process

Acceso Abierto
ID Minciencias: ART-0001628250-61
Ranking: ART-GC_ART

Abstract:

Rechargeable Ni-MH batteries contain strategic metal values which are worth to be recovered. In the present work, a preliminary sequential chemical and electrochemical procedure is proposed, in order to reclaim materials bearing Ni, Co and rare earth elements (REE) from Ni-MH spent batteries. Initially, spent batteries are disassembled to separate the electrode materials (anode and cathode), which are then leached with an aqueous solution of 5w% sulphuric acid. The metal content of this solution is checked by atomic absorption spectrometry techniques. The obtained solution is pH-adjusted (with NaOH), until pH is between 4.0 and 4.3; then, it is heated up to 70°C to precipitate a rare earth elements sulphate (Nd, La, Pr, Ce), as determined by means of x-ray fluorescence techniques. The solids-free solution is then electrolyzed, in order to recover a Ni-Co alloy. The electrolysis conditions were established through a cyclic voltammetry technique.

Tópico:

Extraction and Separation Processes

Citaciones:

Citations: 9
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Información de la Fuente:

SCImago Journal & Country Rank
FuenteJournal of Physics Conference Series
Cuartil año de publicaciónNo disponible
Volumen687
IssueNo disponible
Páginas012107 - 012107
pISSNNo disponible
ISSN1742-6596

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