Abstract
The distribution coefficients for alkaline earth metal ions on heat-treated crystalline hydrated titania fibers were determined as a function of pH at 25°C. The exchange behavior of these ions was well explained by their ion-exchange reaction with hydrogen-ion in the fibers. The ion-exchange ability of these fibers was not affected when these fibers were heat-treated between 25°C and about 70°C, but the value of distribution coefficients decreased when the heat-treatment temperature exceeds 80°C. This behavior is related to the change in the interlayer distance of crystalline hydrated titania.
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