Neutron scattering quantification of unfrozen pore water in frozen mud

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dc.contributor.authorGates, WPen_AU
dc.contributor.authorBordallo, HNen_AU
dc.contributor.authorBouazza, Aen_AU
dc.contributor.authorCarnero-Guzman, GGen_AU
dc.contributor.authorAldridge, LPen_AU
dc.contributor.authorKlapproth, Aen_AU
dc.contributor.authorIles, GNen_AU
dc.contributor.authorBooth, Nen_AU
dc.contributor.authorMole, RAen_AU
dc.contributor.authorSeydel, Ten_AU
dc.contributor.authorYu, DHen_AU
dc.contributor.authorde Souza, NRen_AU
dc.date.accessioned2024-12-13T04:29:26Zen_AU
dc.date.available2024-12-13T04:29:26Zen_AU
dc.date.issued2021-09en_AU
dc.date.statistics2024-11-27en_AU
dc.description.abstractThe Earth's polar regions are experiencing a greater frequency of freeze-thaw events throughout the polar summer, contributing to atmospheric methane and destabilising clay-rich sediments. Clays in soils tightly bind pore water and thus substantially modify freeze-thaw events. While temperatures of phase transitions for confined pore water may be precisely assessed using calorimetric or thermal analyses to −30 or −40 °C, neutron scattering directly probes how pores in clay minerals control ice formation and melting to lower temperatures. We apply elastic neutron scattering to accurately quantify the unfrozen water content of clay gels and unambiguously identify different pore-water environments by their freezing temperatures. Using this approach, we conclude that cryosuction controls water mobility in frozen soils in the absence of soluble salts to much lower temperatures than observed by other techniques. Dyanmics determined from neutron scattering indicates that water in clay gel pores thaws at much lower temperatures than currently considered, and thus pose potential risks for contaminant migration at sub freezing temperatures. The general poor strength of wet clays can significantly impact infrastructure in cold regions undergoing an increased frequency of freeze-thaw events. © 2021 Elsevier Inc.en_AU
dc.description.sponsorshipThis research was funded by the Australian Research Council‘s Linkage Projects Scheme (LP140100516 and LP180101178). Partial travel support by the Australian Institute of Nuclear Science and Engineering and Danscatt. A scholarship to G.G.C.G. was provided by the Peruvian National Program of Scholarships and Student Loans (PRONABEC). Instrument access was provided by the Australian Nuclear Science and Technology Organisation's Centre for Neutron Scattering (P5295, P6167) and the Institute Laue-Langevin.en_AU
dc.identifier.articlenumber111267en_AU
dc.identifier.citationGates, W. P., Bordallo, H. N., Bouazza, A., Carnero-Guzman, G. G., Aldridge, L. P., Klapproth, A., Iles, G. N., Booth, N., Mole, R. A., Seydel, T., Yu, D., & de Souza, N. R. (2021). Neutron scattering quantification of unfrozen pore water in frozen mud. Microporous and Mesoporous Materials, 324, 111267. doi:10.1016/j.micromeso.2021.111267en_AU
dc.identifier.isbn1873-3093en_AU
dc.identifier.issn1387-1811en_AU
dc.identifier.journaltitleMicroporous and Mesoporous Materialsen_AU
dc.identifier.pagination111267-en_AU
dc.identifier.urihttps://doi.org/10.1016/j.micromeso.2021.111267en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15827en_AU
dc.identifier.volume324en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectNeutron diffractionen_AU
dc.subjectScatteringen_AU
dc.subjectWateren_AU
dc.subjectClaysen_AU
dc.subjectGelsen_AU
dc.subjectSaturationen_AU
dc.subjectFreezingen_AU
dc.subjectPolar regionsen_AU
dc.subjectTemperature rangeen_AU
dc.subjectIceen_AU
dc.subjectMeltingen_AU
dc.titleNeutron scattering quantification of unfrozen pore water in frozen muden_AU
dc.typeJournal Articleen_AU
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