Adsorption behavior of americium on zeolites

Yoshinao Ishihara, Hitoshi Mimura, Kenichi Akiba

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Zeolites are expected to be used in buffer materials as an admixture to bentonite to increase their ion exchange ability. The behavior of ion exchange adsorption of Am3+ on various zeolites was examined by batch and column methods. The distribution coefficient of Am3+, Kd, increased with equilibrium pH from 1.5 to 4.0. L zeolite and mordenite having large pore size yielded relatively large values of Kd over 103 at pH 3.0. The Kd for L zeolite was unaffected by the concentration of coexisting cations, i.e. Na+ up to 0.1 M, and K+, Ca2+ and Mg2+ less than 0.01 m. The Am3+ ion was not detected in the effluent passed through the L zeolite column up to 90 bed volumes, even when the feed solution contained a relatively large amount of Na+-0.5 m. Americium ion adsorbed on zeolites could be quantitatively eluted with 0.1 m nitric acid.

Original languageEnglish
Pages (from-to)144-151
Number of pages8
Journaljournal of nuclear science and technology
Volume28
Issue number2
DOIs
Publication statusPublished - 1991 Feb

Keywords

  • Adsorption
  • Americium ions
  • Coexisting cation
  • Distribution coefficient
  • Ion exchange
  • L zeolite
  • Mordenite
  • PH value
  • Pore size
  • Zeolites

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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