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Ion exchange characteristics of palladium from nitric acid solution by anion exchangers

  • Sung Ho LeeEmail author
  • Kwang Rag Kim
  • Chong Hun Jung
  • Hongsuk Chung
Article

Abstract

Radioactive high-level liquid wastes contain significant quantities of platinum group metals (PGM) such as Pd(II), Rh(III) and Ru(III). The PGM are produced as fission products in nuclear reactors. In this study, batch and column experiments were carried out to investigate the ion exchange characteristics of Pd(II), including the effects of the ionic group of ion exchangers, solution temperature, and the concentration of nitric acid by various anion exchangers such as IRN 78 and Dowex 1×8 and also the elution characteristics of Pd(II) by various eluents for the determination of optimal separation conditions. Anion exchangers such as Dowex 1x8 with the ionic group of quaternary methyl ammonium showed a higher capacity than anion exchangers such as IRN 78 with amine group for the adsorption of Pd(II) from nitric acid solution. The optimal nitric acid concentration was shown to be in 2–3 M. The adsorbed Pd(II) was effectively eluted out by 0.5 M thiourea and 0.1 M nitric acid mixed solution.

Key words

Palladium Ion Exchangers Adsorption Elution Separation 

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Copyright information

© Korean Institute of Chemical Engineering 1999

Authors and Affiliations

  • Sung Ho Lee
    • 1
    Email author
  • Kwang Rag Kim
    • 1
  • Chong Hun Jung
    • 1
  • Hongsuk Chung
    • 1
  1. 1.Korea Atomic Energy Research InstituteYusong, TaejonKorea

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