Separation of Co(II)/Ni(II) via micellar-enhanced ultrafiltration using organophosphorous acid extractant solubilized by nonionic surfactant

摘要

Ultrafiltration (UF) of cobalt(II) and nickel(II) in te presence of a micelle-solubilized hydrophobi ligand has been investigated, using polyoxyethylene nonyl phenyl ether with 10 ethyene oxide units (PONPE10) and 2-ethylehexyl phosphonic acid mono-2-ethylhexyl ester (EHPNA) as a nonionic surfactant and an extractant, respectively. In aqueous meida, the metals are entrapped within the surfacetant micelles containing the extractant, and are effectively rejected by UF membraens with their consequent concentration in the retentate solution.