Adsorption and dersorption of lead using synthetic hydroxyapatite material

The adsorption of Pb2+ ions in solution by synthetic hydroxyapatite material was researched. The effects of adsorption time, adsorbent mass, solution pH, and Pb2+ ion concentration on adsorption properties were investigated. The Pb2+ adsorption efficiency of material can reach 98.7%. Two adsorption isotherm models, Freunlich and Langmuir, were used to evaluate adsorption isotherms.