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Czechoslovak Journal of Physics

, Volume 56, Supplement 4, pp D103–D110 | Cite as

Retention of cesium, plutonium and americium by engineered and natural barriers

  • G. Lujaniene
  • J. Šapolaite
  • A. Amulevičius
  • K. Mažeika
  • S. Motiejunas
Article

Abstract

Safety assessment of low and intermediate level waste repository requires sorption parameters and understanding of the radionuclides sorption-desorption mechanism. In order to obtain realistic sorption data for safety relevant radionuclides present in cement (concrete) based near surface repository, some preliminary studies have been carried out. Batch sorption experiments were conducted with two clay samples to determine Kd values of Cs, Pu and Am under a wide range of geochemical conditions. Cs, Pu and Am Kd values were determined for rainwater, groundwater and cement-water of different chemical compositions. Cs, Pu, Am Kd values ranged from 450 to 9700, from 15000 to 21000 and from 15000 to 80000 ml/g, respectively. Iron speciation was determined using Mössbauer spectrometry.

Keywords

Cesium Plutonium Goethite Sequential Extraction Maghemite 
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

© Institute of Physics, Academy of Sciences of Czech Republic 2006

Authors and Affiliations

  • G. Lujaniene
    • 1
  • J. Šapolaite
    • 1
  • A. Amulevičius
    • 1
  • K. Mažeika
    • 1
  • S. Motiejunas
    • 2
  1. 1.Institute of PhysicsVilniusLithuania
  2. 2.Vilnius Gediminas Technical UniversityVilniusLithuania

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