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Effects of Cement Additives on Radionuclide Mobility

Published online by Cambridge University Press:  01 February 2011

Mårten Dario ,
Mireia Molera  and
Bert Allard
Mårten Dario
Affiliation:
Dept of Water and Environmental Studies, Linköping Univ., SE–581 83 Linköping, SWEDEN
Mireia Molera
Affiliation:
Dept of Chem./Nuclear Chem., Royal Inst. of Technology, SE–100 44 Stockholm, SWEDEN
Bert Allard
Affiliation:
MTM Research Centre, Örebro Univ., SE–701 82 Örebro, SWEDEN
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Abstract

The effects of organic cement additives (totally 7) on the sorption of Eu on cement and TiO2 were measured with variation of the concentration of the additive (0.001–10% of the water phase) and reaction time (up to 420 d). There was a significant reduction of the sorption of Eu on cement as well as on TiO2 after 24 h of exposure time in the presence of additives at levels that would be obtained in a cement/water system if the total load of the additive in the cement (up to 3%) would be released into the water phase. Sorption increased with time and would be expected to reach constant levels after 100–200 d. Storage of the additives at 60 and 120 °C, pH 12.5, for up to 110 d (in order to degrade them) did not lead to significantly altered sorption behaviour.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 807: Symposium Scientific Basis for Nuclear Waste Management XXVII , 2003 , 639
Copyright
Copyright © Materials Research Society 2004

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References

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