title: Preconcentration and selective metal ion separation using chelating micelles.
abstract: Chelating aggregates consisting of Triton X100 host micelles and hydrophobic derivatives of PAN have been examined as suitable candidates for preconcentration and selective separation of transition metal ions through micellar-enhanced ultrafiltration. The effective accumulation in the surfactant-rich retentate of nickel(II), copper(II), cobalt(II), manganese(II) and zinc(II), present at trace levels in aqueous samples, has been achieved by operating at pH ca. 6 with a ligand having a binding constant to the host micelles higher than 2000 l./mol. The efficient separation of micelle-bound metal chelates from unreactive ions has been assessed, together with the feasibility of selective enrichment and purification of the investigated metal ions present in mixtures through a multistage process.
authors.affiliation: Dipartimento di Chimica Analitica, Università di Torino, Turin, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Pramauro
authors.forename: A B
authors.initials: AB
authors.lastname: Prevot
authors.forename: V
authors.initials: V
authors.lastname: Zelano
authors.forename: W L
authors.initials: WL
authors.lastname: Hinze
authors.forename: G
authors.initials: G
authors.lastname: Viscardi
authors.forename: P
authors.initials: P
authors.lastname: Savarino