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

Hitoshi Mimura; Jukka Lehto; Rsto Harjula

doi:10.1080/18811248.1997.9733695

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

Hitoshi Mimura, Jukka Lehto, Rsto Harjula

ENG - Quantum Science and Energy Engineering

Research output: Contribution to journal › Article › peer-review

69 Citations (Scopus)

Abstract

The ion exchange of Cs⁺ on a nonstoichiometric compound K_0.87Ni_0.57[NiFe(CN)₆]·nH₂O (KNiFC) was examined by batch methods. The distribution coefficient of Cs⁺, K_{d, 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, αc_s/R_b, was 4.7×10² in the presence of 5M Na⁺. The decreasing order of K_{d, 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
Pages (from-to)	484-489
Number of pages	6
Journal	journal of nuclear science and technology
Volume	34
Issue number	5
DOIs	https://doi.org/10.1080/18811248.1997.9733695
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

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title = "Ion exchange of cesium on potassium nickel hexacyanoferrate (II)s",

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.",

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",

author = "Hitoshi Mimura and Jukka Lehto and Rsto Harjula",

year = "1997",

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doi = "10.1080/18811248.1997.9733695",

language = "English",

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T1 - Ion exchange of cesium on potassium nickel hexacyanoferrate (II)s

AU - Mimura, Hitoshi

AU - Lehto, Jukka

AU - Harjula, Rsto

PY - 1997/1/1

Y1 - 1997/1/1

N2 - 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.

AB - 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.

KW - Cesium

KW - Cesium ions

KW - Concentration dependence

KW - Distribution coefficient

KW - Distribution functions

KW - Free energy

KW - Ion exchange

KW - Ion-exchange selectivity

KW - Kielland plot

KW - Langmuir isotherm

KW - Potassium nickel hexacyanoferrates

KW - Separation factors

KW - Thermodynamic equilibrium constant

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JO - Journal of Nuclear Science and Technology

JF - Journal of Nuclear Science and Technology

SN - 0022-3131

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ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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