Articles | Volume 7, issue 4
Research article
18 Aug 2016
Research article |  | 18 Aug 2016

Quantitative experimental monitoring of molecular diffusion in clay with positron emission tomography

Johannes Kulenkampff, Abdelhamid Zakhnini, Marion Gründig, and Johanna Lippmann-Pipke


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Status: closed
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Short summary
Clay is the prominent barrier material in the geosphere, but diffusion of dissolved species is possible. Diffusion parameters are commonly determined on small samples, disregarding heterogeneity. With positron emission tomography (PET), we monitored heterogeneous transport patterns on larger samples. From the time dependence of the spatial tracer distribution, we derived reliable anisotropic diffusion coefficients, and found indications of preferential transport zones.