Electrochemical Analysis of Ion-Exchange Membranes with Respect to a Possible Use in Electrodialytic Decontamination of Soil Polluted with Heavy Metals

Henrik K. Hansen, Lisbeth M. Ottosen, Søren Laursen, Arne Villumsen

Resultado de la investigación: Contribución a una revistaArtículo

22 Citas (Scopus)

Resumen

Transport numbers in different metal chloride solutions were estimated using the emf method for two ion-exchange membranes: Ionics CR67 HMR412 (cation-exchange membrane) and Ionics AR204 SXRA 7639 Union-exchange membrane). The cation-exchange membrane was found to work nearly ideally for NaCl and CaCl2solutions even at high concentrations, whereas deviation from ideality was seen for ZnCl2and CuCl2solutions. The anion-exchange membrane showed transport numbers for the anion around 0.95 for NaCl, CaCl2and ZnCl2solutions for the concentration range investigated. Electrodialytic desalting experiments taken as a simplified simulation of the eleetrokinetic decontamination method showed that it was possible to remove all ions in the simulated soil volume, with a sharp increase in the potential difference over the soil volume as a result, and that it was possible to control the metal content in the different solutions in the electrodialytic decontamination method.
Idioma originalInglés
Páginas (desde-hasta)2425-2444
Número de páginas20
PublicaciónSeparation Science and Technology
DOI
EstadoPublicada - 1 ene 1997
Publicado de forma externa

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