Qualitative lead extraction from recycled lead-acid batteries slag.
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 ( approximately 60%) and lead ( approximately 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 (Fe(2+)/Fe(3+)) 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.
Smaniotto
Alessandra
A
Department of Chemistry, URI, Campus de Erechim, Erechim, RS 99700-000, Brazil.
Antunes
Angela
A
Filho
Irajá do Nascimento
Ido N
Venquiaruto
Luciana Dornelles
LD
de Oliveira
Débora
D
Mossi
Altemir
A
Di Luccio
Marco
M
Treichel
Helen
H
Dallago
Rogerio
R
D002614:Chelating Agents; D003247:Conservation of Natural Resources; D004492:Edetic Acid; D004581:Electronics; D007220:Industrial Waste / Q000517:prevention & control; D007501:Iron / Q000302:isolation & purification; D007854:Lead / Q000302:isolation & purification*
D002614:Chelating Agents; D007220:Industrial Waste; D007854:Lead; D004492:Edetic Acid; D007501:Iron