In this paper, a new method for the defluoration of potable water is described. In the proposed method, aluminium phosphate is used as a matrix of the stationary phase which can adsorb fluorides or exchange with fluorides selectively and reduce the concentration of fluorides in natural water to an allowable level. We have repeated this experiment with different samples; and satisfactory results were obtained. The proposed method is better than others due to its extensive applicability. Aluminium phosphate can be used in a solution containing a high concentration of dissolved salts. This method functions over a wider range of pH value and is less sensitive to temperature variations than other methods. Finally, the mechanism of the reaction is discussed.
*Original abstract online at https://www.sciencedirect.com/science/article/pii/016041209290113I