Journal of Radioanalytical and Nuclear Chemistry

, Volume 295, Issue 3, pp 1957–1967 | Cite as

Pu and Am sorption to the Baltic Sea bottom sediments

  • G. LujanienėEmail author
  • P. Beneš
  • K. Štamberg
  • K. Jokšas
  • I. Kulakauskaitė


Sorption of Am and Pu isotopes to bottom sediments of the Baltic Sea has been studied under natural and laboratory conditions. Data obtained from sequential extraction, sorption of Am(III), Pu(IV) and Pu(V) as well as oxidation state distribution experiments have shown that Pu(V) sorption mechanism includes a very fast Pu(V) reduction (reaction rate ≤ 2.33 × 10−3 s−1) to Pu(IV) by humic substances and/or by Fe(II) to Pu(IV) and partly to Pu(III). Following reduction Pu isotopes were bound to various components of bottom sediments via ion exchange and surface complexation reactions and a slow incorporation into the crystalline structure of Fe minerals. Kinetics experiments showed that the sorption of Pu(V), Pu(IV) and Am(III) to bottom sediments from natural seawater was controlled by the inert layer diffusion process.


Pu(IV) Pu(V) Bottom sediments Seawater Sorption 



The Financial support provided by the Research Council of Lithuania (contract No. MIP-080/2012) is acknowledged. The authors thank students of the Chemical Department of Vilnius University, participating in the experiments, for technical assistance.


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2012

Authors and Affiliations

  • G. Lujanienė
    • 1
    Email author
  • P. Beneš
    • 2
  • K. Štamberg
    • 2
  • K. Jokšas
    • 3
  • I. Kulakauskaitė
    • 1
  1. 1.SRI Center for Physical Sciences and TechnologyVilniusLithuania
  2. 2.Department of Nuclear ChemistryCTUPrague 1, Brehova 7Czech Republic
  3. 3.SRI Nature Research CentreVilniusLithuania

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