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Artigo Produção Nacional Revisado por pares
BIBTEX RIS

Qualitative lead extraction from recycled lead–acid batteries slag

2009; Elsevier BV; Volume: 172; Issue: 2-3 Linguagem: Inglês

10.1016/j.jhazmat.2009.07.026

ISSN

1873-3336

Autores

Alessandra Smaniotto, Ângela Antunes, Irajá do Nascimento Filho, Luciana Dornelles Venquiaruto, Débora de Olíveira, Altemir José Mossi, Marco Di Luccio, Helen Treichel, Rogério Marcos Dallago,

Tópico(s)

Recycled Aggregate Concrete Performance

Resumo

The pyrometallurgic process that the exhausted batteries are submitted for the recovery of metallic lead generates great amount of a by-product called slag. The slag is composed mainly of iron (≈60%) and lead (≈6%), and this residue cannot be disposed in conventional landfill due to the high lead content. This work presents a new methodology for the extraction of lead from slag, based on the complexing effect of EDTA, a chelating ligand that has the ability to solubilize several heavy metals. As the iron (Fe2+/Fe3+) have a formation's constant with EDTA higher than the lead and is present in high concentrations in the samples, the fluoride ion (F−) was employed to mask the iron ions. The tests were carried out in a qualitative way, confirming the lead extraction by the formation of a yellow precipitate of lead iodide.

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