Kinetics and exchange behaviour of certain sulphur anions on strongly basic anion exchangers in aqueous KCl medium |
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Authors: | A A Abdel-Rassoul H F Aly A Borhan M M Abdel-Hamid |
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Institution: | (1) Atomic Energy Establishment, Cairo, (Egypt);(2) Chemistry Department, Faculty of Science, Tanta University, (Egypt) |
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Abstract: | The kinetics of the exchange of sulphate and chloride ions on the strongly basic anion exchanger Dowex 1X8, of different particle
diameters is investigated. The diffusion coefficient values are calculated by two diferent methods, discussed in the light
of the processes governing the exchange reactions encountered, and found to be mainly controlled by particle diffusion. The
distribution behaviour of sulphate, sulphite, thiosulphate and sulphide between aqueous KCl solutions of different concentrations
and a number of selected anion exchange resins is studied. The data are explained on the premises of the different interactions
involved in both aqueous and resineous phases. The effect of the alkali metal chloride molarities in the aqueous phase (LiCl,
NaCl and KCl) on the exchange behaviour of the different S-anions is also investigated. The results are interpreted in the
light of the water—water interaction and the competition for hydration between the alkali metal cations and the exchanged
S-anions. |
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Keywords: | |
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