title: Uphill permeation of Cr(VI) using Hostarex A327 as ionophore by membrane-solvent extraction processing.
abstract: The transport of chromium by the emulsion pertraction technology (EPERT) using Hostarex A327 (tertiary amine) as a carrier has been investigated. The permeation of the metal is studied as a function of various experimental variables: hydrodynamic conditions, concentration of Cr(VI) and HCl in the source phase, carrier concentration and diluent in the organic phase, strippant concentration in the stripping phase and support characteristics of the membrane. The mass transfer coefficient and the thickness of the aqueous source boundary layer were estimated from the experimental data. Furthermore, the selectivity of the Hostarex A327-bases EPERT towards different metal ions and the behaviour of the system against other carriers are presented.
authors: Centro Nacional de Investigaciones Metalurgicas (CSIC), Avda. Gregorio del Amo 8, Ciudad Universitaria, 28040 Madrid, Spain. fjalgua@cenim.csic.es <fjalgua@cenim.csic.es>
authors: Francisco Jose
authors: FJ
authors: Alguacil
authors: Manuel
authors: M
authors: Alonso
authors: Felix
authors: F
authors: Lopez
authors: Aurora
authors: A
authors: Lopez-Delgado
mesh_terms: D000588:Amines / Q000737:chemistry*; D002857:Chromium / Q000737:chemistry*; D006851:Hydrochloric Acid / Q000737:chemistry; D007476:Ionophores / Q000737:chemistry*; D007753:Laboratories; D008567:Membranes, Artificial; D010539:Permeability; D012680:Sensitivity and Specificity; D012997:Solvents / Q000737:chemistry*; D013997:Time Factors
chemical_list: D000588:Amines; D007476:Ionophores; D008567:Membranes, Artificial; D012997:Solvents; D002857:Chromium; D006851:Hydrochloric Acid