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Influence of Microbial Activity on Technetium Behaviour in Soil Under Waterlogged Condition

Published online by Cambridge University Press:  15 February 2011

K. Tagami  and
S. Uchida
K. Tagami
Affiliation:
Division of Radioecology, National Institute of Radiological Sciences, 3609 Isozaki, Nakaminato-shi, Ibaraki 311–12, Japan
S. Uchida
Affiliation:
Division of Radioecology, National Institute of Radiological Sciences, 3609 Isozaki, Nakaminato-shi, Ibaraki 311–12, Japan
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Abstract

The behaviour of Tc in soil depends upon its chemical forms. Under aerobic conditions, Tc is present as pertechnetate Tc+7 (TcO4–), which has a high geochemical mobility and bioavailability. However, the form changes through a combination of factors such as redox conditions and microbial activity in soils. The anaerobic condition can be supplied in waterlogged rice paddy soil, which is common to Japan and other Southeast Asian countries.

In this study, we focused on the influence of microbial activity on Tc behaviour in soil under the waterlogged condition. The microbial activity is expected to be controlled by addition of glucose and the activity causes a change in the soil redox condition. Air-dried soil with increasing glucose contents and sterile soil were used to compare the effect of microbial activity. The soils were waterlogged with 99Tc solution. Although the concentrations of 99Tc in the surface and bottom solutions of air-dried soils decreased over time with increasing glucose concentration, those of sterile soils were almost constant during the experiment. From these results, it was assumed that the activity of microorganisms influenced Tc adsorption onto the soil.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 353: Symposium – Scientific Basis for Nuclear Waste Management XVIII , 1994 , 973
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

1. Pourbaix, M., Atlas of Electrochemical Equilibria in Aqueous Solutions, (Pergamon Press, Cebelcor, 1966), pp. 294–299.Google Scholar
2. Wildung, R. E., Routson, R. C., Serne, R. J. and Garland, T. R., BNWL-1950 PT2, (CONF-741121-3, Richland, Washington, 1975), pp. 37 – 40.Google Scholar
3. Landa, E. R., Thorvig, L. J. H. and Gast, R. G., Biological Implications of Metals in the Environment, (CONF-750929, Richland, Washington, 1977), pp. 390–401.Google Scholar
4. Lieser, K. H. and Bauscher, Ch., Radiochim. Acta 42, 205 (1987).Google Scholar
5. Stalmans, M., Maes, A. and Cremers, A. in Technetium in the Environment, edited by Desmet, G. and Myttenaere, C. (Elsevier Applied Science Publishers, London, 1986), pp. 91–113.Google Scholar
6. Sheppard, S. C., Sheppard, M. I. and Evenden, W. G., J. Environ. Radioactivity 11, 215 (1990).Google Scholar
7. Kumata, M. and Vandergraaf, T. T. in The Third International Symposium on Advanced Nuclear Energy Reserch (Mito, 1991), pp. 414–419 Google Scholar
8. Sumiya, S., Morita, S., Tobita, K. and Kurabayashi, M., J. Radioanal. Nucl. Chem., Articles 177, 149 (1994).Google Scholar
9. Takai, Y., J. Korean Soc. Soil Sci. Fert. 17, 187 (1984).Google Scholar
10. Yoshida, S., Muramatsu, Y. and Uchida, S., Water, Air, and Soil Pollut. 63, 321 (1992).Google Scholar
11. Bunzl, K. and Schimmack, W., Radiat. Envion. Biophys. 27, 165 (1988).Google Scholar
12. Muramatsu, Y., Uchida, S., Sryotha, P. and Sryotha, K., Water, Air, and Soil Pollut. 49, 125 (1990).Google Scholar