Defluoridation in water using different types of hydroxy apatite

摘要

The fluoride ion is recognized as a normal and frequently occurring constituent in ground waters of many states in India. Higher concentration of fluoride in drinking water leads to health hazards. This paper signifies the application of hydroxy apatite in the reduction of fluoride ion. Apatite a calcium phosphate material (Ca_(10) (Po_4) 6 (OH)_2) made by using different methods has been used for defloridation. The high concentration of fluoride is reduced effectively by apatites prepared using hydrothermal + microwave and hydrothermal method, at the first interval. But in general, the rate of absorbtion is found to be higher in the apatite prepared by hydrothermal+microwave followed by microwave method.