Journal of Radioanalytical and Nuclear Chemistry

, Volume 143, Issue 2, pp 323–328 | Cite as

Actinide and lanthanide extraction from nitric acid solutions by flotation

  • E H. A. Mezhov
  • A. V. Samatov
  • L. V. Troyanovsky
Solution Chemistry


Flotation of thorium, plutonium (IV), uranium(VI) and gadolinium from aqueous nitric acid solutions (HNO3 concentration from 0.01 to 5.0M) was investigated using lauryl phosphoric acid (LPA) as a SAS-collector. It is established that the extent of removal of the metal ions increases with the amount of LPA introduced, regardless of the solution acidity. At a fixed mole LPA to metal ratio the extent of uranium(VI) and gadolinium removal is reduced with increasing acidity, while in case of plutonium(IV) and thorium this parameter remains constant. It is shown that in principle ∼100% extraction of plutonium(IV) and thorium by flotation is possible regardless of the acidity of aqueous solutions. Ca(NO3)2 added to the system in the amount of 0.5M does not significantly affect the flotation extraction of thorium.


Aqueous Solution Uranium Acidity Nitric Acid Acid Solution 


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Copyright information

© Akadémiai Kiadó 1990

Authors and Affiliations

  • E H. A. Mezhov
    • 1
  • A. V. Samatov
    • 1
  • L. V. Troyanovsky
    • 1
  1. 1.AUSRI of Inorganic MaterialsMoscowUSSR

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