Lasalocid (X537A) as a selective carrier for Cd(II) in supported liquid membranes

Abstract : The carboxylic antibiotic lasalocid was shown to facilitate the transport of Cd(II) cations through supported liquid membranes, the driving force being the proton gradient between the two aqueous phases. With hydrocarbons as solvents inside the porous support, the initial metal fluxes were linear versus the inverses of the viscosity values, in accordance with a diffusion limited mechanism. With the polar solvent nitrophenyl octyl ether, the initial flux was six times higher than expected from the viscosity value, and up to 95% of the metal ions were transported. In competitive experiments with equal initial Cd(II) and Zn(II) concentrations, after 94% of Cd(II) had been transported the ratio of Cd(II) to Zn(II) in the receiving phase was 3.8 (pH 8.2 in the source phase, pH 2 in the receiving phase, membrane impregnated with lasalocid 5×10−3 M in nitrophenyl octyl ether).
Type de document :
Article dans une revue
Domaine :
Liste complète des métadonnées
Contributeur : Philippe Falque <>
Soumis le : vendredi 9 mars 2018 - 16:13:50
Dernière modification le : mardi 28 mai 2019 - 14:18:05

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N. Aouad, G. Miquel-Mercier, E. Bienvenue, E. Tronel-Peyroz, G. Jeminet, et al.. Lasalocid (X537A) as a selective carrier for Cd(II) in supported liquid membranes. Journal of Membrane Science, Elsevier, 1998, 139 (2), pp.167 - 174. ⟨10.1016/S0376-7388(97)00240-8⟩. ⟨hal-01727871⟩



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