Journal ArticleDOI
Long-term diffusion experiment at Mont Terri: first results from field and laboratory data
Paul Wersin,L.R. Van Loon,Josep M. Soler,A. Yllera,Jost Eikenberg,Thomas Gimmi,P. Hernán,J.-Y. Boisson +7 more
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TLDR
In this paper, a long-term diffusion experiment, termed DI-A, is carried out at the Mont Terri Rock Laboratory in the Opalinus Clay formation, which is the understanding of the migration and sorption behavior of cationic and anionic species in consolidated clays.About:
This article is published in Applied Clay Science.The article was published on 2004-08-01. It has received 101 citations till now. The article focuses on the topics: Diffusion (business) & Sorption.read more
Citations
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Anion exclusion effects in compacted bentonites: Towards a better understanding of anion diffusion
TL;DR: In this paper, the authors studied the diffusion of 36Cl− in compacted bentonite using through-diffusion, outdiffusion and profile analysis techniques and found that the interlayer porosity of the bentonite depends on the degree of compaction, which can be explained by anion exclusion effects (Donnan exclusion).
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Multicomponent diffusion of a suite of tracers (HTO, Cl, Br, I, Na, Sr, Cs) in a single sample of Opalinus Clay
TL;DR: In this article, a 3-site exchange model for Opalinus Clay is proposed to derive accessible porosities, geometrical factors (the ratio of pore tortuosity and constrictivity) and sorption behavior of the individual tracers assuming that the clay is homogeneous.
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Natural tracer profiles across argillaceous formations
Martin Mazurek,Peter Alt-Epping,Adrian Bath,Thomas Gimmi,Thomas Gimmi,H. Niklaus Waber,Stéphane Buschaert,Pierre De Cannière,Mieke De Craen,A. Gautschi,Sébastien Savoye,Agnès Vinsot,Isabelle Wemaere,Laurent Wouters +13 more
TL;DR: In this article, tracer-profile data, obtained by various methods of pore-water extraction for nine sites in central Europe, are compiled and the results for three sites are presented in detail, but the conclusions are based on model interpretations of the entire data set.
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Characterization of transport properties of argillaceous sediments: Application to the Callovo‐Oxfordian argillite
TL;DR: In this paper, the authors consider the case of a cylindrical cored sample of a saturated argillaceous sediment located between two reservoirs filled with an electrolyte and use nonpolarizable electrodes to monitor the evolution of the pressure (or saline) front between the two reservoirs.
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The Nanoscale Basis of CO2 Trapping for Geologic Storage.
TL;DR: A review of recent progress on research on the subsurface storage of CO2 suggests that the permeability of shale and mudstone seals is heavily dependent on clay fraction and can be extremely low even in the presence of fractures.
References
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Diffusion of HTO, 36Cl- and 125I- in Opalinus Clay samples from Mont Terri. Effect of confining pressure.
TL;DR: In this article, the authors measured the effective diffusion coefficients (D(e)) and rock capacity factors (alpha) on Opalinus Clay samples from the Mont Terri Underground Rock Laboratory (URL) using the through-diffusion technique.
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Solute transport in formations of very low permeability: profiles of stable isotope and dissolved noble gas contents of pore water in the Opalinus Clay, Mont Terri, Switzerland
TL;DR: Pore water profiles of water, stable isotope, and dissolved noble gas content have been determined across the Opalinus Clay and adjacent formations at the rock laboratory at Mont Terri.
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Characterisation of HTO diffusion properties by an in situ tracer experiment in Opalinus clay at Mont Terri.
TL;DR: The evolution of tritium-tracer concentration in the injection system over time and in situ profiles were interpreted with a 3-D numerical simulation of the experiment, and the identification of the transport parameters (orthotropic diffusion tensor and porosity) by minimising the relative quadratic error between the experimental and simulated data.
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Activation energies of the self-diffusion of HTO, 22Na+ and 36Cl− in a highly compacted argillaceous rock (Opalinus Clay)
TL;DR: In this article, the temperature dependence of the self-diffusion of HTO, 22Na+ and 36Cl− in Opalinus Clay (OPA) was studied using a through diffusion technique, in which the temperature was gradually increased in the steady state phase of the diffusion.
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Study of the pore water chemistry through an argillaceous formation: a paleohydrochemical approach
TL;DR: In this article, the spatial and temporal changes of pore water along an argillaceous formation were studied on the basis of the chemistries of the fluids collected through the system, which requires careful sampling and 4 years monitoring.