Article
Licensed
Unlicensed Requires Authentication

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

  • , , and
Published/Copyright: November 6, 2012
Radiochimica Acta
From the journal Radiochimica Acta Volume 100 Issue 12

Abstract

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. 6×105 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.

Keywords: Ion exchange; Americium oxidation; Lanthanides and actinides; Extraction of actinides; Nuclear waste
* Correspondence address: Texas A&M University, Department of Chemistry, College Station, TX 77843-3255, U.S.A.,
Published Online: 2012-11-06
Published in Print: 2012-12

© by Oldenbourg Wissenschaftsverlag, München, Germany

Articles in the same Issue

  1. 41K(n, γ)42K thermal and resonance integral cross section measurements
  2. Spectroscopic study of Pu(IV) oxidation to Pu(VI) in 3 mol/dm3 nitric acid at 373 K
  3. Interfacial sorption/desorption studies of Pu(IV) on Silica and alumina surfaces
  4. The uranium recovery from aqueous solutions using amidoxime modified cellulose derivatives. I. Preparation, characterization and amidoxime conversion of radiation grafted ethyl cellulose-acrylonitrile copolymers
  5. Separation of oxidized americium from lanthanides by use of pillared metal(IV) phosphate-phosphonate hybrid materials
  6. Anomalous extraction behavior of americium(III) in some diglycolamide isomers present in ionic liquid medium
  7. Radiochemical studies relevant to cyclotron production of the therapeutic radionuclide 167Tm
  8. Radiation-induced nitration of organic compounds in aqueous solutions
  9. Titanate nanotubes: preparation, characterization and application in adsorption of strontium ion from aqueous solution
https://doi.org/10.1524/ract.2013.1990
Keywords for this article
Ion exchange; Americium oxidation; Lanthanides and actinides; Extraction of actinides; Nuclear waste

Articles in the same Issue

  1. 41K(n, γ)42K thermal and resonance integral cross section measurements
  2. Spectroscopic study of Pu(IV) oxidation to Pu(VI) in 3 mol/dm3 nitric acid at 373 K
  3. Interfacial sorption/desorption studies of Pu(IV) on Silica and alumina surfaces
  4. The uranium recovery from aqueous solutions using amidoxime modified cellulose derivatives. I. Preparation, characterization and amidoxime conversion of radiation grafted ethyl cellulose-acrylonitrile copolymers
  5. Separation of oxidized americium from lanthanides by use of pillared metal(IV) phosphate-phosphonate hybrid materials
  6. Anomalous extraction behavior of americium(III) in some diglycolamide isomers present in ionic liquid medium
  7. Radiochemical studies relevant to cyclotron production of the therapeutic radionuclide 167Tm
  8. Radiation-induced nitration of organic compounds in aqueous solutions
  9. Titanate nanotubes: preparation, characterization and application in adsorption of strontium ion from aqueous solution
Downloaded on 12.4.2026 from https://www.degruyterbrill.com/document/doi/10.1524/ract.2013.1990/html
Scroll to top button