Adsorption of Cu~(2+) on Amine-Functionalized Mesoporous Silica Brackets

摘要

A directly amine-functionalized mesoporous silica (AMS) was prepared via an anionic surfactant-mediated synthesis method and used as adsorbents for deep removal of Cu~(2+) ions from aqueous solution at room temperature. The synthesized AMS had been characterized by X-ray diffraction, nitrogen physisorption measurement, and thermogra-vimetric analysis. The amine groups prefer to position to the surface of AMS material due to the S~-N~+～I~-mechanism. Copper adsorption process had been studied from both kinetic and equilibrium points of view for AMS material. Experiments proved that the aqueous Cu~(2+) adsorption rates were fast and adsorption capacity was about 53.3 mg/g.