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The Solubility and Sorption of Radium and Tin in a Cementitious Near-Field Environment

  • S Bayliss (a1), F. T. Ewart (a1), R. M. Howse (a1), S. A. Lane (a1), N. J. Pilkington (a1), J. L. Smith-Briggs (a1) and S. J. Williams (a1)...

Abstract

The solubility and sorption of radium and tin have been studied for a cementitious near-field environment.

The solubility of radium was observed to be greater than 10−7M, even with the addition of IM sulphate to the cement equilibrated water. The values of Rn for radium varied from 102 to 103 ml g−1 for the cement types and initial radium concentrations studied.

The solubility of tin was observed to be about 10−4M for a range of cement equilibrated waters above tin oxides and metallic tin. The solubility of tin was observed to increase with pH. Tin solubilities were not affected by the redox conditions. Tin was present in a range of particle sizes in the sorption studies. A value of RD of 104 ml g−1 was observed for tin species less than 0.45μm.

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[1] Ewart, F. T. and Tasker, P W, Chemical Effects in the Near-Field. ‘Waste Management ‘87’, Tuscon, Arizona, March 1987.
[2] Atkinson, A.. UKAEA Report AERE R11777 (1985).
[3] Sharland, S M, Tasker, P W and Tweed, C J. UKAEA Report AERE R12442 (1986).
[4] Robinson, P. C., Hodgkinson, D P, Tasker, P W, Lever, D A, Windsor, M E, Grime, P W and Herbert, A W. UKAEA Report AERE R11854 (1988).
[5] Ewart, F T, Howse, R M, Thomason, H P, Williams, S J and Cross, J E. IX Symposium Scientific Basis for Nuclear Waste Management, Ed. Werne, L, Publ. Elsevier, New York (1986).
[6] Bayliss, S, Ewart, F T, Howse, R M, Smith-Briggs, J L, Thomason, H P and Willmott, H A. XI Symposium on Scientific Basis for Nuclear Waste Management, Ed. Apted, M J and Westerman, R L, Publ.
[7] Berry, J A, Hobley, J, Lane, S A, Littleboy, A K, Nash, M J, Oliver, P, Smith-Briggs, J L and Williams, S J. The solubility and sorption of protactinium in the near-field and far-field environments of a radioactive waste repository. 2nd International Conference on Nuclear and Radiochemistry, Brighton, UK, July 1988.
[8] Pilkington, N J, Shadbolt, P J and Wilkins, J D. Preliminary experimental measurements of the Solubilities of selected long-lived fission products, activatic products and actinide daughters under near-field conditions. UKAEA AERE R13006 (to be published).
[9] Baes, C F Jr. and Mesmer, R E. The Hydrolysis of Cations, John Wiley and Sons, New York, 1976.
[10] Cross, J E, Ewart, F T and Tweed, C J. UKAEA Report AERE R12324 (1987).
[11] Pourbaix, M. Atlas of Electrochemical Equilibria in Aqueous Solutions, p479. Pergamon Press (1966).

The Solubility and Sorption of Radium and Tin in a Cementitious Near-Field Environment

  • S Bayliss (a1), F. T. Ewart (a1), R. M. Howse (a1), S. A. Lane (a1), N. J. Pilkington (a1), J. L. Smith-Briggs (a1) and S. J. Williams (a1)...

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