Preparation of amino-functionalized mesoporous silica by one-pot method for the adsorption of As（V）

Using 3-［2-（2-aminoethylamino）ethylamino］ propyl-trimethoxysilane （AAAPTS） as the amino monomer，an amino-functionalized mesoporous silica was prepared by the one-pot method to adsorb As（V）. The materials were characterized by Fourier infrared spectroscopy（FT-IR），scanning electron microscope（SEM） and nitrogen adsorption-desorption analysis，and the adsorption experiment conditions were optimized. The results demonstrated that the optimal adsorption performance was achieved with the adsorption capacity of 93.74 mg/g when the sample solution pH was 3，the temperature was 25℃，and the adsorption time was 30 min. The experimental results of kinetic adsorption and isothermal adsorption showed that the synthesized material conforms to the pseudo-second-order kinetic model and belongs to the chemical bonding process of monolayer adsorption. This study provides a potential adsorption material for removing As（V） in environmental water samples. © 2022, Youke Publishing Co.,Ltd. All rights reserved.