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Dissolution of platinum metal alloys contained in the feed clarification sludge

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Abstract

The dissolution behaviour of two alloys, which represent the metallic precipitates, occurring in the dissolution step of a nuclear reprocessing plant was investigated. The solubility of these alloys, containing Mo, Ru, Rh and Pd, in HNO3-solutions is rather low and dissolution ceases after some time, caused by passivation. A significant acceleration of the dissolution rate takes place if ozone is passed through the alloy/HNO3-suspension, or if an electrolytic dissolver with or without an oxidation catalyst is used. Moreover, Ru can be separated as RuO4 by distillation.

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Geckeis, H., Neumann, W. & Müller, W. Dissolution of platinum metal alloys contained in the feed clarification sludge. Journal of Radioanalytical and Nuclear Chemistry, Articles 152, 199–206 (1991). https://doi.org/10.1007/BF02042153

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  • DOI: https://doi.org/10.1007/BF02042153

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