Abstract

The solubility of hydrous UO 2 in sodium hydroxide solutions containing sodium dithionite and/or Zn metal powder as reductants has been measured. The results provide no firm evidence for any amphoteric behavior of U(IV) but do set an upper limit of K ≤ 2 x 10 −23 for the hypothetical reaction: ▪ The results provide no evidence for such a reaction.

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