In-situ X-ray fluorescence to investigate iodide diffusion in opalinus clay: Demonstration of a novel experimental approach

Jaquenoud, Max; Elam, William T.; Grundl, Tim; Gimmi, Thomas; Jakob, Andreas; Schefer, Senecio; Cloet, Veerle; De Cannière, Pierre; Van Loon, Luc R.; Leupin, Olivier X. (2021). In-situ X-ray fluorescence to investigate iodide diffusion in opalinus clay: Demonstration of a novel experimental approach. Chemosphere, 269, p. 128674. Elsevier Science 10.1016/j.chemosphere.2020.128674

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During the last two decades, the Mont Terri rock laboratory has hosted an extensive experimental research campaign focusing on improving our understanding of radionuclide transport within Opalinus Clay. The latest diffusion experiment, the Diffusion and Retention experiment B (DR-B) has been designed based on an entirely different concept compared to all predecessor experiments. With its novel exper- imental methodology, which uses in-situ X-ray fluorescence (XRF) to monitor the progress of an iodide plume within the Opalinus Clay, this experiment enables large-scale and long-term data acquisition and provides an alternative method for the validation of previously acquired radionuclide transport parameters.
After briefly presenting conventional experimental methodologies used for field diffusion experiments and highlighting their limitations, this paper will focus on the pioneer experimental methodology developed for the DR-B experiment and give a preview of the results it has delivered thus far.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Geological Sciences
08 Faculty of Science > Institute of Geological Sciences > Rock-Water Interaction

UniBE Contributor:

Gimmi, Thomas

Subjects:

500 Science > 550 Earth sciences & geology

ISSN:

0045-6535

Publisher:

Elsevier Science

Funders:

[UNSPECIFIED] FANC ; [UNSPECIFIED] Nagra ; [UNSPECIFIED] NMWO ; [UNSPECIFIED] RWM ; [46] Bundesamt für Landestopografie, Wabern, CHE (swisstopo)

Language:

English

Submitter:

Thomas Gimmi

Date Deposited:

29 Jan 2021 15:40

Last Modified:

07 Mar 2021 19:29

Publisher DOI:

10.1016/j.chemosphere.2020.128674

BORIS DOI:

10.48350/150737

URI:

https://boris.unibe.ch/id/eprint/150737

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