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Studies on Speciation of Americium, Technetium and Neptunium in Simulated Vitrified-Waste Leachates

Published online by Cambridge University Press:  21 February 2011

G. Bidoglio ,
A. De Plano  and
A. Chatt
G. Bidoglio
Affiliation:
Commission of the European Communities, Joint Research Centre, Ispra Establishment, Radiochemistry and Nuclear Chemistry Division, I-21020 Ispra (Varese), ITALY
A. De Plano
Affiliation:
Commission of the European Communities, Joint Research Centre, Ispra Establishment, Radiochemistry and Nuclear Chemistry Division, I-21020 Ispra (Varese), ITALY
A. Chatt
Affiliation:
Visiting scientist, on sabbatical leave from Trace Analysis Research Centre, Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, B3H 4J1, Canada.
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Abstract

Physico-chemical forms of several radionuclides are being investigated in order to characterize the migrating species in a deep geologic repository. Under ground water bicarbonate and carbonate concentration levels, Am(CO3)2 has been observed to be the most important complex while the formation of Am(OH)(CO3)22− has been indicated, stability constants of Am-complexes have been calculated, and a distribution diagram of Am(III) species as a function of pH is presented. Speciation of Tc has been studied using radiochemical and electromigration methods in oxic and anoxic environments; in effective diffusion coefficient of 1.37 × 10−5 cm2 S−1 for ToO4− has been obtained. Preliminary studies on Np(V) indicate that NpO2+ does not form strong complexes with carbonate and bicarbonate ions at ground water concentrations.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 15: Symposium D – Scientific Basis for Nuclear Waste Management VI , 1982 , 373
Copyright
Copyright © Materials Research Society 1983

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References

REFERENCES

1. Sill, C. W., Anal. Chem., 38 (1966) 803.Google Scholar
2. Lanza, F. and Parnisari, E., Nucl. Chem. Waste Mang., 2 (1981) 131.Google Scholar
3. Bidoglio, G., Chatt, A., DePlano, A. and Zorn, F., J. Radioanal. Chem., submitted (1982).Google Scholar
4. Bonne, A., SCK/CEN, Mol, Belgium, personal communication.Google Scholar
5. Avogadro, A., Murray, C. N. and DePlano, A., Proc. Intern. Symp. Scientific Basis for Nuclear Waste Management, Boston, MRS, Northrup, C.J.M. Jr., Ed., Plenum Press, N.Y. (1980) 665.Google Scholar
6. Heremans, R., SCK/CEN, Mol, Belgium, personal communication.Google Scholar
7. Mari, C. M., Pizzini, S., Giorgi, T. A., Rosai, L. and Borghi, M., J. Appl. Electrochem., 7 (1977) 215.CrossRefGoogle Scholar
8. Guillaumont, R., Muxart, R. and Boussieres, G., Bull. Soc. Chim., 5 (1968) 1952.Google Scholar
9. Bidoglio, G., Radiochem. Radioanal. Lett., in press (1982).Google Scholar
10. Bidoglio, G. and Marcandawli, B., Joint Research Centre, Ispra. Italy, EURATOM Report, in press (1982).Google Scholar
11. Keller, C., The Chemistry of Transuranic Elements, vol. 3, Kernchemie in Einzeldarstellingen, Verlag-Chemie, GmbH.Google Scholar
12. Gerlit, J. B., Proc. Intern. Conf. Peaceful Uses of Atomic Energy, IAEA, Vienna, 7 (1955) 145.Google Scholar
13. Tribalat, S. and Beydon, J., Anal. Chim. Acta, 8 (1953) 22.CrossRefGoogle Scholar
14. Chatt, A., Bidoglio, G. and DePlano, A., Anal. Chim. Acta, submitted (1982).Google Scholar
15. Handbook of Chemistry and Physics, CRC Press, Cleveland, U.S.A., 57th Edn., (1976–1977) D-153.Google Scholar
16. Bondietti, E. A. and Franics, C. W., Science, 203 (1979) 1337.Google Scholar
17. Allard, B., Kigatsi, H. and Torstenfelt, B., Radiochem. Radioanal. Lett., 37 (1979) 223.Google Scholar
18. Allard, B., Proc. NEA/OECD Workshop on Geochemistry and Radioactive Waste Disposal Paris, France, in press (1982).Google Scholar
19. Chatt, A., Bidoglio, G. and Tanet, G., in preparation (1982).Google Scholar