Electromigration experiments for studying transport parameters and sorption of cesium and strontium on intact crystalline rock

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dc.contributor.author Puukko, Esa
dc.contributor.author Lehto, Jukka
dc.contributor.author Lindberg, Antero
dc.contributor.author Voutilainen, Mikko
dc.date.accessioned 2018-10-16T09:59:01Z
dc.date.available 2018-10-16T09:59:01Z
dc.date.issued 2018-10
dc.identifier.citation Puukko , E , Lehto , J , Lindberg , A & Voutilainen , M 2018 , ' Electromigration experiments for studying transport parameters and sorption of cesium and strontium on intact crystalline rock ' , Journal of Contaminant Hydrology , vol. 217 , pp. 1-7 . https://doi.org/10.1016/j.jconhyd.2018.08.010
dc.identifier.other PURE: 115448481
dc.identifier.other PURE UUID: 9ae3781d-dac5-4e28-8b00-002465a5938d
dc.identifier.other RIS: urn:ED5D2DF18A9487BB5F72B7C9F11BACB6
dc.identifier.other Scopus: 85052889420
dc.identifier.other ORCID: /0000-0002-5534-149X/work/49416839
dc.identifier.other WOS: 000449446800001
dc.identifier.uri http://hdl.handle.net/10138/250555
dc.description.abstract This study aims to determine upscaling factors for the radionuclides' distribution coefficients (Kd) on crushed rocks to intact rock for the safety analysis of radionuclide migration from spent nuclear fuel in bedrock towards biosphere. Here we report the distribution coefficients for intact rock determined by electromigration sorption experiments and compare the results with those from recently performed batch sorption experiments. In total 34 rock samples, representing three typical rock types from Olkiluoto Finland, were studied in order to determine distribution coefficients, effective diffusion coefficients and porosities using the electromigration sorption experiments, formation factor experiments and porosity measurement. The parameters determined represent the three main parameters of geosphere used in the safety assessment of spent nuclear fuel disposal. The distribution coefficients of cesium and strontium on intact rock varied between (0.12–26.2) × 10−3 m3/kg and (1.4–13.3) × 10−3 m3/kg, respectively, whereas recent results for crushed rock varied between (2–57) × 10−3 m3/kg and (17–40) × 10−3 m3/kg, respectively. This implies that crushing increases the distribution coefficient significantly and upscaling factors from 3 to 33 were determined for scaling the distribution coefficients of crushed rock to ones of intact rock. The determined distribution coefficients of cesium and strontium for intact rock can be directly applied in the safety assessment whereas the upscaling factors can be used to convert distribution coefficients determined for crushed rock into ones for intact rock. Based on the results for porosities and effective diffusion coefficients it was concluded that they do not seem to correlate with sorption parameters. However, an alteration state, heterogeneity and mineral content seem to be important factors affecting the distribution coefficients and upscaling factors. en
dc.format.extent 7
dc.language.iso eng
dc.relation.ispartof Journal of Contaminant Hydrology
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject Electromigration
dc.subject Sorption
dc.subject Distribution coefficient
dc.subject Formation factor
dc.subject Effective diffusion coefficient
dc.subject Porosity
dc.subject POROSITY
dc.subject GRANITE
dc.subject COEFFICIENTS
dc.subject SAMPLES
dc.subject IN-SITU
dc.subject 116 Chemical sciences
dc.title Electromigration experiments for studying transport parameters and sorption of cesium and strontium on intact crystalline rock en
dc.type Article
dc.contributor.organization Ion exchange for nuclear waste treatment and for recycling
dc.contributor.organization Department of Chemistry
dc.contributor.organization Laboratory of Radiochemistry (-2016)
dc.contributor.organization Geological disposal of spent nuclear fuel
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1016/j.jconhyd.2018.08.010
dc.relation.issn 0169-7722
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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