Fe3+ and amino functioned mesoporous silica: Preparation, structural analysis and arsenic adsorption

► Materials were prepared by grafting amino and then coordinating Fe3+ on silica gel. ► The materials had mesoporous structure, large surface area, abundant amino and Fe3+. ► The materials had high removal ability and adsorption speed for As(V) and As(III). ► Langmuir and Freundlich model were used to fit the adsorption isotherms. ► The effect of chloride and sulfate for As(V) and As(III) removal was investigated.