processamento de pilhas do tipo botão processing of spent button cells

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ID: 212470
2008
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Abstract
This work presents hydrometallurgical routes for recovering valuable elements from spent button cells, based on leaching of internal components with sulfuric acid (Li/MnO2 and Zn-air) or nitric acid (Ag-Zn), at 90 ºC for 2h. Slow evaporation of the leachate crystallized MnSO4.H2O, whereas lithium was partially recovered as LiF. Mercury present in Zn-air and Ag-Zn samples was precipitated as HgS. Silver was recovered as AgCl before mercury precipitation. Zinc and iron were precipitated as hydroxides. The amount of iron varied according to the intensity of the corrosion of the external cell case. Final wastes are neutral and colorless sodium sulfate/nitrate solutions.
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Authors ;Cristiano Nunes da Silva;Julio Carlos Afonso
Journal greece and rome
Year 2008
DOI
10.1590/S0100-40422008000600048
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422008000600048
Keywords
metal recovery waste managementchemistry button cell

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