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Communication Dans Un Congrès Année : 2016

Spectral induced polarization of Na-montmorillonite dispersions

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Résumé

Montmorillonite has remarkable adsorption properties because of its high specific surface area and surface charge density. Its surface charge distribution is also anisotropic. The basal faces have a negative and permanent surface charge due to isomorphic substitutions in the crystal and the edge faces have a pH-dependent surface charge due to amphoteric surface sites. We propose low-frequency complex impedance measurements of Na-Mt dispersions in the unexplored frequency range [Hz kHz] to get information on surface charge distribution, size and shape of Na-Mt dispersions at various particles concentrations (weight fractions 0.5 to 5%), salinities (from 10-4 to 10-2 M NaCl), and pH (5 to 10).
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Dates et versions

hal-01280362 , version 1 (29-02-2016)

Identifiants

  • HAL Id : hal-01280362 , version 1

Citer

Philippe Leroy, Guillaume Mériguet, S Huisman, E Zimmermann, M Weigand, et al.. Spectral induced polarization of Na-montmorillonite dispersions. Goldschmidt 2016, Jun 2016, Yokohama, Japan. ⟨hal-01280362⟩
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