Preparation of Poly(allylamine)-silica Composites and Adsorption Performance for Heavy Metal Ions

摘要

Poly(allylamine)-silica composites(PAA/SiO_2) was prepared via CPTCS as coupling agent and PAA as modifier. The structure and adsorption properties of silica gel, CPTCS-SiO_2 and PAA/SiO_2 were determinated by FTIR, structural analysis, TG analysis and adsorption test. The results show that PAA/SiO_2 had excellent adsorption capacities for Cu( II), Pb( II) and Ni( II) in aqueous solutions. Its adsorption capacities can reach 0.972mmol/g for copper ion at experimental conditions. Besides, PAA/SiO_2 also possessed excellent stability in the flow tests.