Mineralization of natural hydroxyapatite for high efficiency of Pb2+ ion removal in aqueous solution

The mineralized hydroxyapatite (m-HA) was prepared by soaking natural hydroxyapatite (n-HA) extracted from pig bone in the simulated body fluid (SBF) for 3 days. The m-HA was much better in comparison with the n-HA for removing Pb2+ ions from aqueous solution. After 4 hours of adsorption experiments, m-HA material eliminated almost 100% of lead ions while n-HA removes only 65.4%. The adsorption isotherm study was effectuated for the m-HA.