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Sorption of radionuclides to a cementitious backfill material under near-field conditions
journal contribution
posted on 2013-06-27, 14:20 authored by Monica Felipe-Sotelo, John Hinchliff, Nick Evans, Peter Warwick, David ReadThe 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.
History
School
- Science
Department
- Chemistry
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.Publisher
© The Mineralogical SocietyVersion
- VoR (Version of Record)
Publication date
2012Notes
Closed access. This article was published in the journal, Mineralogical Magazine [© Mineralogical Society] and the definitive version is available on Ingenta Connect.eISSN
1471-8022Publisher version
Language
- en