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 language | English |
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Pages (from-to) | 484-489 |
Number of pages | 6 |
Journal | journal of nuclear science and technology |
Volume | 34 |
Issue number | 5 |
DOIs | |
Publication status | Published - 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