Sorption of Fluoride Ions from Aqueous Solutions and Well Drinking Water by Thermally Treated Hydrotalcite
- 3 January 2003
- journal article
- Published by Taylor & Francis Ltd in Separation Science and Technology
- Vol. 38 (1), 131-147
- https://doi.org/10.1081/ss-120016702
Abstract
Fluoride is a naturally occurring element in many water supplies, and it may cause fluorosis. The hydrotalcite was synthesized and characterized before and after the retention of fluoride ions by x-ray diffraction, electron microscopy, and IR. The thermally treated hydrotalcite was evaluated for the sorption of fluoride ions from aqueous solutions at pH 5, 7, and 9 and well water. It was found that the retention of fluoride ions by the material was 80% or higher. The Kd values show that the best conditions for the sorption of F− ions from the solutions is at pH 5, and they show as well that the physicochemical properties affect the uptake process.Keywords
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