Ion Exchange of Cesium on Potassium Nickel Hexacyanoferrate (II) s
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概要
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The ion exchange of Cs<SUP>+</SUP> on a nonstoichiometric compound K<SUB>0.87</SUB>Ni<SUB>0.57</SUB>[NiFe(CN)<SUB>6</SUB>]•nH<SUB>2</SUB>O (KNiFC) was examined by batch methods. The distribution coefficient of Cs<SUP>+</SUP>, K<SUB>d, Cs</SUB>, was independent of Na<SUP>+</SUP> concentration up to 5M (=mol/dm<SUP>3</SUP>), while it decreased with increasing concentrations of both K<SUP>+</SUP> and NH<SUP>+</SUP><SUB>4</SUB>. The separation factor for Cs/Rb, α<SUB>Cs/Rb</SUB>, was 4.7×10<SUP>2</SUP> in the presence of 5M Na<SUP>+</SUP>. The decreasing order of K<SUB>d, Cs</SUB> in the coexisting cations was found to be NH<SUP>+</SUP><SUB>4</SUB>>K<SUP>+</SUP>, H<SUP>+</SUP> > Na<SUP>+</SUP>, Ca<SUP>2+</SUP>. The uptake of Cs<SUP>+</SUP> on KNiFC followed a Langmuir-type isotherm and the maximum amount of Cs<SUP>+</SUP> taken up was estimated to be 2.57±0.074mmol/g. The free energy of K<SUP>+</SUP>_ ?? _Cs<SUP>+</SUP> ion exchange was calculated to be -5.4±1.4kJ/mol by Kielland plot.
- 社団法人 日本原子力学会の論文
- 1997-05-25
著者
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MIMURA Hitoshi
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
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Mimura H
Tohoku Univ. Sendai
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Mimura Hitoshi
Institilte Of Multidisciplinary Research For Advanced Materials Tohoku University
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Lehto Jukka
Laboratory Of Radiochemistry Department Of Chemistry University Of Helsinki
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HARJULA Risto
Laboratory of Radiochemistry, Department of Chemistry, University of Helsinki
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Harjula Risto
Laboratory Of Radiochemistry Department Of Chemistry University Of Helsinki
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