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Redox Reactions of Iron and Uranium Dioxide in Simulated Cement Pore Water Under Anoxic Conditions

Published online by Cambridge University Press:  11 February 2011

Daqing Cui ,
Kastriot Spahiu  and
Paul Wersin
Daqing Cui
Affiliation:
Studsvik Nuclear AB, SE-611 82 Nyköping, Sweden
Kastriot Spahiu
Affiliation:
SKB, P. O.Box 5864, SE-102 40 Stockholm, Sweden
Paul Wersin
Affiliation:
NAGRA, Hardstrasse 73, CH-5430 Wettingen, Switzerland
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Abstract

Results on the chemical behavior of Fe(0) and UO2(s), as well as the interaction between fresh and corroded iron with U(VI) in simulated cement contacting alkaline solution are reported. Batch experiments were conducted under anoxic conditions at different alkalinities and salt concentrations to investigate: (a) the corrosion of iron foils (b) the U(VI) removal by fresh, aged and pre-treated (with FeS or Fe3O4 layers) iron surfaces in a simulated cement pore fluid, (c) the dissolution rates of newly reduced UO2.00 slices in simulated cement pore fluid and KOH solutions (pH 12.7) and (d) the isotope exchange reactions between dissolved 235U(VI) and 238UO2(s). The reacted iron and UO2(s) surfaces were analyzed by X-ray diffraction (XRD), scanning electron microscopy-energy dispersive spectra (SEM-EDS), laser Raman spectroscopy and X-ray photoelectron, spectroscopy (XPS).

Type
articles
Information
MRS Online Proceedings Library (OPL) , Volume 757: Symposium II – Scientific Basis for Nuclear Waste Management XXVI , 2002 , II9.11
Copyright
Copyright © Materials Research Society 2003

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References

REFERENCES

1. Berner, U., in: The use of thermodynamic databases in performance assessment, Workshop Proceedings, OECD-NEA, Paris 2002, pp. 139–149.Google Scholar
2. Wersin, P., Spahiu, K. and Bruno, J., SKB Technical Report 94–02, Stockholm 1994.Google Scholar
3. Puigdomenech, I., Banwart, S., Bateman, K. et al., SKB - ICR 99–01, Stockholm 1999.Google Scholar
4. Langmuir, D., Aqueous Environmental Geochemistry, Prentice Hall, London 1997.Google Scholar
5. Grenthe, I., Fuger, J., Konings et al., Chemical Thermodynamics of Uranium, Elsevier Science Publishers, Amsterdam 1992.Google Scholar
6. Cui, D. and Spahiu, K., in press, Nuclear Science and Technology (2002) 500–503.Google Scholar
7. Cui, D., Spahiu, K., Radiochim. Acta 90 (2002) 1–6.Google Scholar
8. Sagoe-Crentsil, K.K., Glasser, F.P., Cement and concrete research, 23, pp 785–791, 1993.Google Scholar
9. Figg, J. in: International Experience with Durability of Concrete in Marine Environment (Kumar Mehta, P. ed.) Universiy of Calif. Berkley, 1989, 49.Google Scholar
10. Rai, D., Felmy, A.R. and Ryan, J. L, Inorg. Chem. 29, (1990) 260.Google Scholar
11. Yaima, T, Kawamura, Y, Ueta, S., Mat Res. Soc. Symp. Proc., 353 (1995) 1137.Google Scholar
12. Lewis, D.G., in: Soils and Environment. Soil processes from mineral to landscape scale (Aureswald, K., Stanjek, H., Bigham, J. M. eds.) Adv. GeoEcol. 30 (1997) 345.Google Scholar
13. Vins, J., Subrt, J., Zapletal, V., Hanousek, F., Coll. Czech Chem. Comm., 52 (1987) 93–102.Google Scholar
14. Cui, D., Devoy, J., The Surface Precipitation during UO2 Leaching Process, presented at Sci. Basis Nucl. Waste Manag. Symp., MRS 2002 fall meeting, Boston (this volume).Google Scholar