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Journal of Radioanalytical and Nuclear Chemistry

, Volume 279, Issue 2, pp 601–610 | Cite as

Sorption of uranium(VI) onto strontium titanate in KNO3 medium

  • H. B. Ortiz-Oliveros
  • E. Ordoñez-Regil
  • S. M. Fernández-Valverde
Article

Abstract

The sorption of uranium(VI) on the perovskite structure of strontium titanate in a 0.5M KNO3 solution is studied. SrTiO3 commercial material was characterized by XRD showing a tausonite face, with a specific area of 2.42 m2.g−1. The electrical surface characterization of the compound was performed by mass and potentiometric titrations. pHpzc in water was 8.5±0.3 and 9.1±0.2 in 0.5M KNO3 solution, showing a positively charged surface. FITEQL 4.0 program was used to calculate the sorption curves and the surface acidity constants by the constant capacitance model obtaining: log K 1 = 8.67 and log K 2 = −9.43. The sorption edge was fitted with two different uranium(VI) species sorbed, corresponding to bidentate complexes of UO 2 2+ and UO2(OH)2H2O on the surface of strontium titanate.

Keywords

Uranium Strontium Titanate Potassium Nitrate Solution Acidity Constant Hydration Time 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media, LLC. 2008

Authors and Affiliations

  • H. B. Ortiz-Oliveros
    • 1
    • 2
  • E. Ordoñez-Regil
    • 1
  • S. M. Fernández-Valverde
    • 1
  1. 1.Depto. de QuímicaInstituto Nacional de Investigaciones NuclearesMéxico D.F., C.P.México
  2. 2.Facultad de CienciasUniversidad Autónoma del Estado de MéxicoPiedras BlancasMéxico

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