Effect of interlayer cation and relative humidity on the hydration properties of a dioctahedral smectite
- Oueslati, Walid
- Karmous, M. S.
- Rhaiem, H.
- Lanson, B.
- Amara, A. B. H.
DOIAbstract
International audienceThis paper aims at characterizing the structural evolution of a dioctahedral smectite (i.e. Wyoming montmorillonite) saturated by Na+, Cu2+or Pb2+. Hydration properties of the <2μm size fraction of Wyoming montmorillonite smectite (SWy) source clay (low charge i.e. 0.35) were studied by modelling of X-ray diffraction (XRD) patterns recorded under controlled relative humidity (RH) conditions on Na, Cu or Pb saturated specimens. The Cation Exchange Capacity (CEC) of the starting sample was first Na+ saturated to guarantee better dispersion, followed by exchanges with the cations Cu2+ or Pb2+. The resulting complexes were respectively labelled Wy-Na, Wy-Cu and Wy-Pb. The qualitative analysis of XRD patterns obtained under...
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