Thermodynamics of hydration of MX80 smectite derived from hydration isotherms

Hélène Gailhanou (1) , Philippe Blanc (1) , Arnault Lassin (1) , Philippe Vieillard (2) , Renaud Denoyel (3) , E. Bloch (3) , Benoît Madé (4) , Eric Giffaut (4)

1 BRGM - Bureau de Recherches Géologiques et Minières (BRGM)
2 HydrASA - Hydrogéologie, Argiles, Sols, Altérations (E2)
3 LCP - Laboratoire Chimie Provence
4 ANDRA - Agence Nationale pour la Gestion des Déchets Radioactifs

Hydration energies contribute significantly to the stability of hydrated clay minerals. However, thermodynamic data of hydration for clay minerals are still poorly known. The present study aims to improve our comprehension of the hydration processes of sodic smectite MX80, and to implement a new methodology for extracting thermodynamic data of hydration of the smectite.

Mots clés: hydration; smectite; thermodynamics; energies; adsorption isotherm

Domaines: Planète et Univers [physics]; Sciences de la Terre; Minéralogie; Planète et Univers [physics]; Sciences de la Terre; Géochimie; Sciences de l'environnement; Milieux et Changements globaux

Hélène Gailhanou, Philippe Blanc, Arnault Lassin, Philippe Vieillard, Renaud Denoyel, et al.. Thermodynamics of hydration of MX80 smectite derived from hydration isotherms. Goldschmidt 2013, Aug 2013, Florence, Italy. ⟨hal-00834004⟩