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Translational diffusion of water in compacted clay systems

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Abstract.

The translational diffusion of water in compacted clays at a high hydration level has been investigated by quasielastic neutron scattering at a time-of-flight spectrometer FOCUS (SINQ). Four compacted clays with systematic structural differences have been studied: Na-montmorillonite, Na-illite, kaolinite and pyrophyllite. The QENS experiments were performed using two different incident wavelengths in order to access a larger Q range and verify the data analysis. The translational diffusion coefficient for water in Na-montmorillonite and Na-illite are lower than those for bulk water, whereas the preliminary results for kaolinite and pyrophyllite show larger diffusion coefficient.

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Authors and Affiliations

  1. Laboratory for Waste Management, Paul Scherrer Institut, 5232, Villigen, Switzerland

    F. González, L. Van Loon & T. Gimmi

  2. Physical Chemistry, Saarland University, 66123, Saarbrücken, Germany

    F. Jurányi

  3. Laboratory for Neutron Scattering, Paul Scherrer Institut, 5232, Villigen, Switzerland

    F. Jurányi

  4. Institute of Geological Sciences, University of Bern, 3012, Bern, Switzerland

    T. Gimmi

Authors
  1. F. González
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  2. F. Jurányi
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  3. L. Van Loon
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  4. T. Gimmi
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González, F., Jurányi, F., Van Loon, L. et al. Translational diffusion of water in compacted clay systems. Eur. Phys. J. Spec. Top. 141, 65–68 (2007). https://doi.org/10.1140/epjst/e2007-00019-9

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  • DOI: https://doi.org/10.1140/epjst/e2007-00019-9

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