Radiation synthesis and characterization of 3-（trimethoxysilyl） propyl methacrylate silanized silica-graft-vinyl imidazole for Hg（Ⅱ） adsorption

作     者：SUN Jian CHEN Zhimin GE Mengyi XU Ling 

作者机构：Beijing Key Laboratory for Solid Waste Utilization and Management Department of Energy and Resources Engineering College of Engineering Peking University Beijing 100871 China 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2013年第24卷第B12期

页      面：43-47页

核心收录：

学科分类：081702[工学-化学工艺] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：Supported by National Key Technology R&D Program (No. 2011BAB02B05)  National Natural Science Foundation of China (No. 21103004) and the National High Technology Research and Development Program (No. 2012AA06A117).Acknowledgements We thank Mr. Qiuqiang Li for kindly support in sample irradiation 

主　　题：甲基丙烯酸酯 二氧化硅 三甲氧基 吸附剂 接枝率 硅烷化 乙烯基 除汞 

摘      要：Silica-based adsorbent was prepared by radiation induced grafting of vinyl imidazole (VIM) onto the silanized silica, which was silanized by 3-(trimethoxysilyl) propyl methacrylate. The effects of monomer composition and absorbed dose on the grafting yield were investigated to optimize the reaction conditions. The results showed that a VIM concentration of 2.5 mol·dm-3 and an absorbed dose of 50 kGy were the optimal reaction conditions. FT IR and XPS spectra manifested that VIM was successfully grafted onto the silica surface. The SS-g-VIM adsorbent had excellent selectivity for Hg(II) adsorption in mixture divalent cationic metal solution and a maximum adsorption capacity of ca. 78 mg/g to Hg(II) at pH 5. The adsorption isotherm was investigated and the adsorption of Hg(II) fitted well with Langmuir mode. These results suggested that SS-g-VIM adsorbent has potential application for the removal of Hg(II) from wastewater. © 2013, Science Press. All rights reserved.