Studies of the hydrous titanium oxide ion exchanger. III. Distribution coefficients and some applications.
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概要
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In order to understand the cation-exchange behavior of hydrous titanium oxide, the distribution coefficients of various cations were measured as a function of the pH and the ionic strength. The order of selectivity for alkali metal ions is Cs<SUP>+</SUP>>Rb<SUP>+</SUP>>K<SUP>+</SUP>>Na<SUP>+</SUP>, for alkaline earth metal ions, Ba<SUP>2+</SUP>>Sr<SUP>2+</SUP>>Ca<SUP>2+</SUP>, and for bivalent transition metal ions, Zn<SUP>2+</SUP>>Cu<SUP>2+</SUP>>Co<SUP>2+</SUP>. From the dependency of the distribution coefficients on the pH, it is concluded that the apparent dissociation constants of the exchanger reported previously are not constant, but gradually decrease with the pH of the medium. By using ammonium chloride and ammonium nitrate solutions as eluents, nearly quantitative separations of <SUP>137</SUP>Cs–<SUP>133</SUP>Ba and <SUP>137</SUP>Cs–<SUP>89</SUP>Sr were achieved with a relatively small column.
- 公益社団法人 日本化学会の論文
著者
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Tsuji Masamichi
Department Of Chemical Science Graduate School Of Natural Science And Technology Kanazawa University
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Inoue Yasushi
Department of Applied Physics, Osaka University
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