Study on adsorption of Pb2+ by synthetic tobermorite

Tobermorite is a mineral material with good ion exchange properties. The potassium feldspar ore from Lushi country is muscovite syenite. Potassium feldspar was hydrothermally decomposed with CaO as an additive, and then tobermorite nano-scale powder was synthesized. Based on the research work of our group, the adsorption property of tobermorite to Pb²⁺ from aqueous solution was studied. The factors of adsorption were studied such as pH values, the reaction time, initial concentration, the temperature. By the orthogonal experiment of the adsorption, we can get the optimize condition of the adsorption. The adsorption equation was curvefitting, by the Langmuir adsorption isotherm model. The thermodynamics and dynamics adsorption of Pb²⁺ by tobermorite was analyzed.