Ion exchange of cesium on potassium nickel hexacyanoferrate (II)s

Hitoshi Mimura, Jukka Lehto, Rsto Harjula

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69 Citations (Scopus)

Abstract

The ion exchange of Cs+ on a nonstoichiometric compound K0.87Ni0.57[NiFe(CN)6]·nH2O (KNiFC) was examined by batch methods. The distribution coefficient of Cs+, Kd, Cs, was independent of Na+ concentration up to 5M (=mol/dm3), while it decreased with increasing concentrations of both K+ and NH4+. The separation factor for Cs/Rb, αcs/Rb, was 4.7×102 in the presence of 5M Na+. The decreasing order of Kd, Cs in the coexisting cations was found to be NH4+K+, H+Na+, Ca2+. The uptake of Cs+ on KNiFC followed a Langmuir-type isotherm and the maximum amount of Cs+ taken up was estimated to be 2.57±0.074mmol/g. The free energy of K+←Cs+ ion exchange was calculated to be −15.4±1.4kJ/mol by Kielland plot.

Original languageEnglish
Pages (from-to)484-489
Number of pages6
Journaljournal of nuclear science and technology
Volume34
Issue number5
DOIs
Publication statusPublished - 1997 Jan 1

Keywords

  • Cesium
  • Cesium ions
  • Concentration dependence
  • Distribution coefficient
  • Distribution functions
  • Free energy
  • Ion exchange
  • Ion-exchange selectivity
  • Kielland plot
  • Langmuir isotherm
  • Potassium nickel hexacyanoferrates
  • Separation factors
  • Thermodynamic equilibrium constant

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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