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

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

doi:https://doi.org/10.5194/se-7-1207-2016

Articles | Volume 7, issue 4

https://doi.org/10.5194/se-7-1207-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

Pore-scale tomography & imaging - applications, techniques...

https://doi.org/10.5194/se-7-1207-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

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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Final revised paper (published on 18 Aug 2016)
Preprint (discussion started on 18 Mar 2016)
Companion paper

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC1: 'summary of paper', Anonymous Referee #1, 20 Apr 2016
- AC1: 'diffusion', Johannes Kulenkampff, 25 Apr 2016
RC2: 'Comments', Anonymous Referee #2, 25 May 2016
- AC2: 'Thanks for suggestions', Johannes Kulenkampff, 14 Jun 2016

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.