Nickel(II) removal by mixtures of Acorga M5640 and DP8R in pseudo-emulsion based hollow fiber with strip dispersion technology

摘要

This work presents the investigation of Ni(II) extraction from aqueous solution through pseudo-emulsion\udbased hollow fiber strip dispersion (PSEHFSD) containing the mixture 2-hydroxy-5-nonylbenzaldehyde\udoxime + di(2-ethylhexyl) phosphoric acid/Exxsol D100 as extractant in the form of a pseudo-emulsion\udwith H2SO4. The organic and aqueous strip phases are separated when the stirring device is stopped.\udThe permeation of Ni(II) is investigated as a function of various experimental variables: hydrodynamic\udconditions, feed pH, extractants mixture concentration in the pseudo-emulsion, initial Ni(II) concentration\udin feed phase, H2SO4 concentration in the pseudo-emulsion as strippant. In PEHFSD, pseudo-emulsion\udis an emulsion that is formed temporarily between organic and stripping solutions. In this\udinvestigation, feed was circulated through the lumen side in counter-current mode. The selectivity of\ud2-hydroxy-5-nonylbenzaldehyde oxime + di(2-ethylhexyl) phosphoric acid/Exxsol D100 based PEHFSD\udtoward different metals was also examined.