title: Copper recovery from ore by liquid-liquid extraction using aqueous two-phase system.
abstract: We investigated the extraction behavior of Cu(II) in the aqueous two-phase system (ATPS) formed by (L35+MgSO(4)+H(2)O) or (L35+(NH(4))(2)SO(4)+H(2)O) in the presence of the extracting agent 1-(2-pyridylazo)-2-naphthol (PAN). At pH=3 and a PAN concentration of 0.285 mmol kg(-1), both ATPS lead to the effective separation of Cu(II) from other metallic ions (Zn(II), Co(II), Ni(II) and Fe(III)). High separation factors range between 1000 and 10,000 were obtained for the extraction of Cu(II) and concomitant metallic ions. This ATPS was used for the extraction of Cu(II) from a leached ore concentrate with a extraction percentage of 90.4 ± 1.1%; other metals were mainly located in the bottom phase.
authors.affiliation: Grupo de Química Verde Coloidal e Macromolecular, Departamento de Química, Centro de Ciências Exatas e Tecnológicas, Universidade Federal de Viçosa, Av. P.H. Rolfs s/n, Viçosa, MG 36560-000, Brazil.
authors.forename: Leandro Rodrigues
authors.initials: LR
authors.lastname: de Lemos
authors.forename: Igor José Boggione
authors.initials: IJ
authors.lastname: Santos
authors.forename: Guilherme Dias
authors.initials: GD
authors.lastname: Rodrigues
authors.forename: Luis Henrique Mendes
authors.initials: LH
authors.lastname: da Silva
authors.forename: Maria C Hespanhol
authors.initials: MC
authors.lastname: da Silva
mesh_terms: D003300:Copper / Q000737:chemistry / Q000302:isolation & purification*; D006863:Hydrogen-Ion Concentration; D059625:Liquid-Liquid Extraction; D009284:Naphthols / Q000737:chemistry; D011092:Polyethylene Glycols / Q000737:chemistry; D011108:Polymers / Q000737:chemistry; D011409:Propylene Glycols / Q000737:chemistry
chemical_list: D009284:Naphthols; D011108:Polymers; D011409:Propylene Glycols; C041728:1-(2-pyridylazo)-2-naphthol; C012504:polypropylene glycol; D011092:Polyethylene Glycols; D003300:Copper