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- W2076457905 abstract "Summary Technetium-99 is a β -emitting fission product of 238 U. It is important when considering a safety case for nuclear waste disposal because of its high yield in radioactive waste and long half-life. The aqueous chemistry of Tc in a cementitious repository is likely to be dominated by Tc(VII), as TcO 4 − , in aerobic areas and by Tc(IV), as TcO 2 (am), in anaerobic. Some previous studies have shown an increase in Tc(IV) solubility with increasing pH above pH 9.5 whilst others have not observed this increase. This study found that the solubility of Tc(IV) remains independent of pH until around 13.5, when a small increase can be seen which continues to increase linearly with pH. Modelling suggests that this increase occurs as the species TcO(OH) 3 − is formed. The formation constant was estimated with data from this study and was found to be log K 2 =−21.6±0.3." @default.
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- W2076457905 date "2007-12-01" @default.
- W2076457905 modified "2023-09-23" @default.
- W2076457905 title "The solubility of technetium(IV) at high pH" @default.
- W2076457905 doi "https://doi.org/10.1524/ract.2007.95.12.709" @default.
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