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Title: Sorption of radionuclides to a cementitious backfill material under near-field conditions
Authors: Felipe-Sotelo, Monica
Hinchliff, John
Evans, Nick
Warwick, Peter
Read, David
Keywords: Vault backfill
Europium
Geological disposal
Radioactive waste
Sorption
Thorium
Uranium
Uranyl
Issue Date: 2012
Publisher: © The Mineralogical Society
Citation: FELIPE-SOTELO, M. ... et al., 2012. Sorption of radionuclides to a cementitious backfill material under near-field conditions. Mineralogical Magazine, 76 (8), pp. 3401 - 3410.
Abstract: The sorption behaviour of I−, Cs+, Ni2+, Eu3+, Th4+ and UO22+on NRVB (Nirex reference vault backfill) a possible vault backfill, at pH 12.8 was studied. Sorption isotherms generated were compared to results obtained in the presence of cellulose degradation products (CDP). Whereas Cs was not affected by the presence of the organic compounds, a notable reduction in the sorption of Th and Eu to cement was observed. The results also indicated limited removal of Ni from solution (with or without an organic ligand) by sorption, the concentration in solution seemingly being determined solely by solubility processes. In the case of uranium, the presence of CDP increased the sorption to cement by almost one order of magnitude. Further studies into the uptake of CDP by cement are being undertaken to identify the mechanism(s) responsible.
Description: Closed access. This article was published in the journal, Mineralogical Magazine [© Mineralogical Society] and the definitive version is available on Ingenta Connect.
Version: Published
DOI: 10.1180/minmag.2012.076.8.53
URI: https://dspace.lboro.ac.uk/2134/12645
Publisher Link: http://dx.doi.org/10.1180/minmag.2012.076.8.53
Appears in Collections:Closed Access (Chemistry)

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