Electrotransport of proton and divalent cations through modified cation-exchange membranes - Université de Montpellier Accéder directement au contenu
Article Dans Une Revue Journal of Electroanalytical Chemistry Année : 1995

Electrotransport of proton and divalent cations through modified cation-exchange membranes

Résumé

Separation of divalent cations from binary electrolyte solutions with protons was achieved by electrotransport through modified cation-exchange membranes (CEMs). The CEM modification was carried out by adsorption of polyethyleneimine on the membrane surface. Without any applied driving force, both modified and non-modified membranes exhibited a higher affinity for divalent cations. Under an electrical field, the transport number of the divalent cation decreased significantly. The apparent rate constants of the penetration of the divalent cations into the membrane were calculated on the basis of unidirectional fluxes and concentration profiles of cations within the anodic unstirred layer. The unidirectional fluxes were measured by means of the radiotracer technique. The concentration profiles were determined by numerical resolution of the Nernst-Planck electrodiffusion equations coupled with the Poisson equation for current densities lower than the limiting value.

Domaines

Chimie
Fichier principal
Vignette du fichier
chapotot1995.pdf (754.61 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Licence : CC BY NC - Paternité - Pas d'utilisation commerciale

Dates et versions

hal-01728842 , version 1 (11-04-2023)

Identifiants

Citer

Agnès Chapotot, Gérald Pourcelly, Claude Gavach, Frédéric Lebon. Electrotransport of proton and divalent cations through modified cation-exchange membranes. Journal of Electroanalytical Chemistry, 1995, 386 (1-2), pp.25-37. ⟨10.1016/0022-0728(94)03789-6⟩. ⟨hal-01728842⟩
78 Consultations
27 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More