SYNTHESIS AND STUDY ADSORPTION CHARACTERS OF ALUMINIUM OXIDE – POLYANILINE COMPOSITE MATERIAL

Abstract

Aluminium oxide – polyaniline composite material has many applications in fact. This material was succesfully synthesized by chemical method. The studies of material structure characteristics shows that the Al₂O₃ - PANi existed in the short fibers form and clusters with the diameter about 100 nm. Al₂O₃ - PANi composite has the ability to adsorb Pb (II) in aqueous solution at pH of 3.0, the equilibrium contact time of 60 minutes. When the initial concentration of Pb (II) increases, the adsorption capacity increases and the adsorption efficiency decreases. The adsorption isotherm fitted well to three models: Langmuir, Freundlich and Dubinin - Radushkevich models. The maximum adsorption capacity was 44.05 mg/g, inwhich the single-layer adsorption capacity was 32.30 mg/g. The adsorption kinetic followed the pseudo-second-order kinetic model with activation energy of adsorption equal 13.17 kJ/mol. So that was physical adsorption process.