Water vapor diffusive transport in a smectite clay:Cationic control of normal versus anomalous diffusion
| Autor: | Henrik Hemmen, Éverton Carvalho dos Santos, Leander Michels, Yves Méheust, Jon Otto Fossum, Mário Alberto Simonato Altoé, Geraldo José da Silva, R. Droppa |
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| Přispěvatelé: | Norwegian University of Science and Technology [Trondheim] (NTNU), Norwegian University of Science and Technology (NTNU), Géosciences Rennes (GR), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR)-Centre National de la Recherche Scientifique (CNRS), Universidade de Brasilia [Brasília] (UnB), Universidade Federal do Espirito Santo (UFES), Niels Bohr Institute [Copenhagen] (NBI), Faculty of Science [Copenhagen], University of Copenhagen = Københavns Universitet (KU)-University of Copenhagen = Københavns Universitet (KU), Universidade Federal do ABC (UFABC), 234125, Norges Forskningsråd, 401484/2012-2, Conselho Nacional de Desenvolvimento Científico e Tecnológico, CS Fund, BEX 4792/14-9, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR), Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS), University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH), Universidade Federal do ABC = Federal University of ABC = Université Fédérale de l'ABC [Brazil] (UFABC), Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Macropore Nanoporous Anomalous diffusion [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] food and beverages 01 natural sciences Fick's laws of diffusion complex mixtures 010305 fluids & plasmas Chemical engineering 13. Climate action 0103 physical sciences [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology 010306 general physics Mesoporous material Porous medium Porosity Water vapor |
| Zdroj: | Michels, L, Meheust, Y, Altoe, M A S, dos Santos, E C, Hemmen, H, Droppa Jr, R, Fossum, J O & da Silva, G J 2019, ' Water vapor diffusive transport in a smectite clay : Cationic control of normal versus anomalous diffusion ', Physical Review E, vol. 99, no. 1, 013102 . https://doi.org/10.1103/PhysRevE.99.013102 Physical Review E Physical Review E, American Physical Society (APS), 2019, 99 (1), pp.013102. ⟨10.1103/PhysRevE.99.013102⟩ Physical Review E, 2019, 99 (1), pp.013102. ⟨10.1103/PhysRevE.99.013102⟩ |
| ISSN: | 2470-0045 2470-0053 |
| DOI: | 10.1103/PhysRevE.99.013102 |
| Popis: | International audience; The transport of chemical species in porous media is ubiquitous in subsurface processes, including contaminant transport, soil drying, and soil remediation. We study vapor transport in a multiscale porosity material, a smectite clay, in which water molecules travel in mesopores and macropores between the clay grains but can also intercalate inside the nanoporous grains, making them swell. The intercalation dynamics is known to be controlled by the type of cation that is present in the nanopores; in this case exchanging the cations from Na+ to Li+ accelerates the dynamics. By inferring spatial profiles of mesoporous humidity from a space-resolved measurement of grain swelling, and analyzing them with a fractional diffusion equation, we show that exchanging the cations changes mesoporous transport from Fickian to markedly subdiffusive. This results both from modifying the exchange dynamics between the mesoporous and nanoporous phases, and from the feedback of transport on the medium's permeability due to grain swelling. An important practical implication is a large difference in the time needed for vapor to permeate a given length of the clay depending on the type of intercalated cation. |
| Databáze: | OpenAIRE |
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