Separation of oxidized americium from lanthanides by use of pillared metal(IV) phosphate-phosphonate hybrid materials

Academic Article


  • Closing the nuclear fuel cycle in the US poses many challenges, one of which is found in the waste streams, which contain both trivalent lanthanides and actinides. The separation of americium from the raffinate will dramatically reduce the long-term radiotoxicity of the waste. The sorption of americium in both the tri- and pentavalent oxidation states was observed for four M(IV) phosphate-phosphonate ion exchange materials in nitric acid at pH 2. High selectivity was observed for reduced Am(III) with Kd values ca. 6×10 5 mL/g, while the Kd values for Am(V) were much lower. A new method of synthesizing and stabilizing AmO2 + to yield a lifetime of at least 24 h in acidic media using a combination of sodium persulfate and calcium hypochlorite will be described. © by Oldenbourg Wissenschaftsverlag, Mülnchen.
  • Authors

    Published In

  • Radiochimica Acta  Journal
  • Digital Object Identifier (doi)

    Author List

  • Burns JD; Borkowski M; Clearfield A; Reed DT
  • Start Page

  • 901
  • End Page

  • 906
  • Volume

  • 100
  • Issue

  • 12