Temperature dependence of adsorption of caesium lons on crystalline hydrous titanium dioxide fibers.
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The distribution coefficient of caesium ions, <I>K</I><SUB>d</SUB>, measured as a function of pH at 25–100 °C, decreased with increasing temperature. Enthalpy change of the adsorption of Cs<SUP>+</SUP> on H<SUB>2</SUB>Ti<SUB>4</SUB>O<SUB>9</SUB>·<I>n</I>H<SUB>2</SUB>O estimated from the plot of log<I>K</I><SUB>d</SUB> vs. <I>T</I><SUP>−1</SUP> in the range of 25–85 °C was −4.6 kcal mol<SUP>−1</SUP>. Above 95 °C, <I>K</I><SUB>d</SUB> values were lower than those extraporated from the plot due to a decrease in the crystallinity of the fibers.
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関連論文
- Temperature dependence of adsorption of caesium lons on crystalline hydrous titanium dioxide fibers.