title: Qualitative lead extraction from recycled lead-acid batteries slag.
abstract: 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.
authors: Department of Chemistry, URI, Campus de Erechim, Erechim, RS 99700-000, Brazil.
authors: Alessandra
authors: A
authors: Smaniotto
authors: Angela
authors: A
authors: Antunes
authors: Irajá do Nascimento
authors: Ido N
authors: Filho
authors: Luciana Dornelles
authors: LD
authors: Venquiaruto
authors: Débora
authors: D
authors: de Oliveira
authors: Altemir
authors: A
authors: Mossi
authors: Marco
authors: M
authors: Di Luccio
authors: Helen
authors: H
authors: Treichel
authors: Rogerio
authors: R
authors: Dallago
mesh_terms: 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*
chemical_list: D002614:Chelating Agents; D007220:Industrial Waste; D007854:Lead; D004492:Edetic Acid; D007501:Iron