核化学与放射化学2018，Vol.40Issue(3)：166-174,9.DOI:10.7538/hhx.2018.YX.2018009
U(Ⅵ)在偕胺肟基功能化介孔二氧化硅上的吸附
Sorption of U(Ⅵ)on Amidoxime-Functionalized Mesoporous Silica
李博林 1朱璐 1王路生 1孙亚楼 1杨柳 1陈愫文1
作者信息
- 1. 兰州大学 核科学与技术学院,甘肃 兰州 730000
- 折叠
摘要
Abstract
Two amidoxime-functionalized mesoporous silica (SBA-15 )materials were pre-pared by a post-grafting method,and characterized by Fourier transform infrared spectroscopy (FTIR),X-ray diffraction (XRD),transmission electron microscopy (TEM),Brunner-Emmet-Teller (BET)measurements,and elemental analysis.The sorption of U (Ⅵ)on SBA-15 and amidoxime-functionalized SBA-15 was investigated by a batch method.The results indicate that the pore structure of amidoxime-functionalized mesoporous silica is the same as SBA-15 ,but the pore volume and BET surface area decreases.Compared to SBA-15,the sorption ability of amidoxime-functionalized SBA-15 for U (Ⅵ)is obviously in-creased.SBA-15-2AO with more amidoxime groups has the highest adsorption capacity of about 0.885 mmol/g for U(Ⅵ),which is 4 times of SBA-15.The sorption process is exo-thermic and follows a pseudo-second-order type sorption kinetics for all materials.In addi-tion,U(Ⅵ)adsorption depends strongly on pH,but the effect of ionic strength is wak. Amidoxime-functionalized mesoporous silica exhibites high selectivity and a better sorption ability for U(Ⅵ)over a series of competing metal ions.关键词
介孔二氧化硅/U(Ⅵ)/偕胺肟基/吸附Key words
mesoporous silica/U(Ⅵ)/amidoxime/sorption分类
化学化工引用本文复制引用
李博林,朱璐,王路生,孙亚楼,杨柳,陈愫文..U(Ⅵ)在偕胺肟基功能化介孔二氧化硅上的吸附[J].核化学与放射化学,2018,40(3):166-174,9.
