title: Nickel(II) removal by mixtures of Acorga M5640 and DP8R in pseudo-emulsion based hollow fiber with strip dispersion technology.
abstract: This work presents the investigation of Ni(II) extraction from aqueous solution through pseudo-emulsion based hollow fiber strip dispersion (PSEHFSD) containing the mixture 2-hydroxy-5-nonylbenzaldehyde oxime+di(2-ethylhexyl) phosphoric acid/Exxsol D100 as extractant in the form of a pseudo-emulsion with H₂SO₄. The organic and aqueous strip phases are separated when the stirring device is stopped. The permeation of Ni(II) is investigated as a function of various experimental variables: hydrodynamic conditions, feed pH, extractants mixture concentration in the pseudo-emulsion, initial Ni(II) concentration in feed phase, H₂SO₄ concentration in the pseudo-emulsion as strippant. In PEHFSD, pseudo-emulsion is an emulsion that is formed temporarily between organic and stripping solutions. In this investigation, feed was circulated through the lumen side in counter-current mode. The selectivity of 2-hydroxy-5-nonylbenzaldehyde oxime+di(2-ethylhexyl) phosphoric acid/Exxsol D100 based PEHFSD toward different metals was also examined.
authors.affiliation: Centro Nacional de Investigaciones Metalurgicas (CSIC Agency), Avenida Gregorio del Amo 8, Madrid, Spain.
authors.forename: R
authors.initials: R
authors.lastname: Gonzalez
authors.forename: A
authors.initials: A
authors.lastname: Cerpa
authors.forename: F J
authors.initials: FJ
authors.lastname: Alguacil
mesh_terms: D009532:Nickel / Q000032:analysis / Q000737:chemistry*; D010755:Organophosphates / Q000737:chemistry*; D010091:Oximes / Q000737:chemistry*; D013464:Sulfuric Acids / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*
chemical_list: D010755:Organophosphates; D010091:Oximes; D013464:Sulfuric Acids; D014874:Water Pollutants, Chemical; C007377:di-2-(ethylhexyl)phosphoric acid; D009532:Nickel; C033158:sulfuric acid