Conference Abstract
| 
10 Nov 2021
Conference Abstract |
| 10 Nov 2021
| 10 Nov 2021
Transport in tight material enlightened by process tomography
Johannes Kulenkampff
CORRESPONDING AUTHOR
Institute of Resource Ecology – Reactive Transport, Helmholtz-Zentrum Dresden-Rossendorf, Leipzig, Germany
Till Bollermann
Institute of Resource Ecology – Reactive Transport, Helmholtz-Zentrum Dresden-Rossendorf, Leipzig, Germany
Maria A. Cardenas Rivera
Institute of Resource Ecology – Reactive Transport, Helmholtz-Zentrum Dresden-Rossendorf, Leipzig, Germany
Cornelius Fischer
Institute of Resource Ecology – Reactive Transport, Helmholtz-Zentrum Dresden-Rossendorf, Leipzig, Germany
Related authors
Johannes Kulenkampff, Abdelhamid Zakhnini, Marion Gründig, and Johanna Lippmann-Pipke
Solid Earth, 7, 1207–1215, https://doi.org/10.5194/se-7-1207-2016, https://doi.org/10.5194/se-7-1207-2016, 2016
Short summary
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.
Johannes Kulenkampff, Marion Gründig, Abdelhamid Zakhnini, and Johanna Lippmann-Pipke
Solid Earth, 7, 1217–1231, https://doi.org/10.5194/se-7-1217-2016, https://doi.org/10.5194/se-7-1217-2016, 2016
Short summary
Short summary
Transport processes can be observed with input–output experiments, disregarding the impact of heterogeneities, or they can be modelled, based on structural images. In contrast, positron emission tomography (PET) directly yields the spatio-temporal distribution of tracer concentration. PET benefits from its molecular sensitivity together with a reasonable resolution. We illustrate its use with examples of process monitoring of advection and diffusion processes, and we discuss benefits and limits.
Chaofan Chen, Tao Yuan, Renchao Lu, Cornelius Fischer, Olaf Kolditz, and Haibing Shao
Adv. Geosci., 58, 77–85, https://doi.org/10.5194/adgeo-58-77-2022, https://doi.org/10.5194/adgeo-58-77-2022, 2022
Short summary
Short summary
The moving distance of the diffusion front is farther away the canister center, along the direction with the neighboring layer having lower diffusion coefficient.
When the bedding angle increases, the diffusion front moves farther in z+ direction, reflecting the increase in effective diffusivity and higher impact of parallel-to-bedding diffusion.
The neighboring layers can slightly reshape the diffusion front line of the radionuclide.
Johannes Kulenkampff, Abdelhamid Zakhnini, Marion Gründig, and Johanna Lippmann-Pipke
Solid Earth, 7, 1207–1215, https://doi.org/10.5194/se-7-1207-2016, https://doi.org/10.5194/se-7-1207-2016, 2016
Short summary
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.
Johannes Kulenkampff, Marion Gründig, Abdelhamid Zakhnini, and Johanna Lippmann-Pipke
Solid Earth, 7, 1217–1231, https://doi.org/10.5194/se-7-1217-2016, https://doi.org/10.5194/se-7-1217-2016, 2016
Short summary
Short summary
Transport processes can be observed with input–output experiments, disregarding the impact of heterogeneities, or they can be modelled, based on structural images. In contrast, positron emission tomography (PET) directly yields the spatio-temporal distribution of tracer concentration. PET benefits from its molecular sensitivity together with a reasonable resolution. We illustrate its use with examples of process monitoring of advection and diffusion processes, and we discuss benefits and limits.
