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Radionuclide Transport by Groundwater Colloids at the Koongarra Uranium Deposit

Published online by Cambridge University Press:  25 February 2011

T.E. Payne ,
R. Edis  and
T. Seo
T.E. Payne
Affiliation:
Australian Nuclear Science and Technology Organisation, PMB 1, Menai, NSW 2234, Australia
R. Edis
Affiliation:
Australian Nuclear Science and Technology Organisation, PMB 1, Menai, NSW 2234, Australia
T. Seo
Affiliation:
Power Reactor and Nuclear Fuel Development Corporation, Chubu Works, 959-31, Sonodo, Jorinji, Izumi-cho, Toki City, 509-51, Japan
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Abstract

Groundwater and entrained particles were sampled from several boreholes at the Koongarra uranium deposit in the Northern Territory of Australia. Conventional filtration techniques, hollow fibre ultrafiltration, and stirred-cell ultrafiltration were used to separate dissolved species, large particles (> 1 μm) and colloids (< 1 μm). The colloids and particles included clay minerals, particularly kaolinite, and chlorite, together with fine quartz grains. Iron was present as particle coatings, and in a separate colloidal form. The amount of 238U associated with colloids (expressed as a percentage of the total 238U which passed through the 1.0 μm filter) ranged up to 6.5%. The corresponding figures for Th were 10-85%. However, the amount of 230Th which passed through the 1.0 μm filter was extremely small, and 230Th was associated to a much greater extent with larger particles, which are unlikely to be mobile in natural groundwaters. In some fine particle and colloidal fractions, the 227Th/230Th activity ratio in the thorium alpha spectrum was unusually high, indicating the presence of substantial quantities of 227Ac. This suggested that actinium could be present as a mobile colloid phase. Overall, there was very little colloidal material in these groundwaters, with only iron, uranium, actinium, and thorium showing a significant association with colloids.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 257: Symposium – Scientific Basis for Nuclear Waste Management XV , 1991 , 481
Copyright
Copyright © Materials Research Society 1992

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References

REFERENCES

1. Duerden, P., review paper, these proceedings.Google Scholar
2. Kim, J.I., Buckau, G., Baumgartner, F., Moon, H.C., and Lux, D., in Scientific Basis for Nuclear Waste Management VII, edited by McVay, G.L. (Elsevier Science Publishers, New York, 1984), p. 31.Google Scholar
3. Degueldre, C., Baeyans, B., Goerlich, W., Riga, J., Verbist, J., and Stadelmann, P., Geochim. Cosmochim. Acta, 53, 603 (1989).CrossRefGoogle Scholar
4. Short, S.A., Lowson, R.T., and Ellis, J., Geochim. Cosmochim. Acta, 5–2, 2555 (1988).CrossRefGoogle Scholar
5. Dearlove, J.P.L., Longworth, G., Ivanovich, M., Kim, J.I., Delakowitz, B. and Zeh, P., Radiochim. Acts, 52/53, 83 (1991).CrossRefGoogle Scholar
6. Vilks, P., Cramer, J.J., Shewchuk, T.A., and Larocque, J.P.A., Radiochim. Acta, 44/45, 305 (1988).CrossRefGoogle Scholar
7. Miekeley, N., Jesus, H.C., Silveira, C.L.P. and Kuechler, I.L., in Scientific Basis for Nuclear Waste Management XII, edited by Lutz, W. and Ewing, R.C. (Mater. Res. Soc. Proc. 127, Pittsburgh, PA, 1989), p. 831.Google Scholar
8. Ivanovich, M., Duerden, P., Payne, T., Nightingale, T., Longworth, G., Wilkins, M.A., Hasler, S.E., Edgehill, R.B., Cockayne, D.J. and Davey, B.G., Natural Analogue Study of the Distribution of Uranium Series Radionuclides Between the Colloid and Solute Phases in the Hydrogeological System of the Koongarra Uranium Deposit, Australia. Harwell Report AERE-R 12975 (1988).CrossRefGoogle Scholar
9. Seo, T., in Alligator Rivers Analogue Project, Second Annual Report, edited by Duerden, P. (Australian Nuclear Science and Technology Organisation, Lucas Heights Australia, 1991), p.189.Google Scholar
10. Giblin, A.M. and Snelling, A.A.. J. Geochem. Explor. 19, 33 (1983).CrossRefGoogle Scholar
11. Murakami, T., Isobe, H. and Edis, R., in Scientific Basis for Nuclear Waste Management XIV edited by Abrajano, T.A. and Johnson, L.H. (Mater. Res. Soc. Proc. 212 Pittbburgh, PA, 1991), p.741.Google Scholar
12. Golian, C., Nightingale, T. and Airey, P.L., Nucl. Instr. and Meth. in Phys. Res., 223, 577 (1984).Google Scholar
13. Nozaki, Y. and Horibe, Y., Earth Planet. Sci. Lett., 65, 39 (1983).CrossRefGoogle Scholar
14. Dickson, B.L. and Meakins, R.L., Nucl. Instr. and Meth. in Phys. Res., 223, 593 (1984).CrossRefGoogle Scholar