Factors Influencing the Thermal Stability and Lead Sorption Capacity of Hydroxyapatite Manufactured by Precipitation Method Using Industrial Calcium Hydroxide

摘要

In this study, the thermal stability of hydroxyapatite was investigated as a function of synthesis factors such as pH, aging time, and calcination temperature. Hydroxyapatite was prepared using calcium hydroxide and orthophosphoric acid and the effect of heat treatment on lead sorption were determined by the batch equilibrium technique. Although the thermal stability of powders was independent from the synthesized condition up to 800℃ the material produced at neutral pH and aged during 24 h indicated the suitable stability even at 1000℃. Also, the powder synthesized at above condition completely removed lead compared to that for the other powders.