期刊论文

Removal Mechanism of U(Ⅵ) byβ-cyclodextrin Modified Mesoporous Silica Material

Xie, S.

中文

原子能科学技术

1000-6931

2020

54

10

1753-1761

10.7538/yzk.2019.youxian.0733

国家自然科学基金资助项目（11475080）；

本校为第一且通讯机构

以三乙氧基(3-异氰酸丙基)硅为交联剂,通过后接枝法合成了β-环糊精改性介孔二氧化硅(SBA-15-CD)材料.通过静态吸附试验研究了溶液pH值、SBA-15-CD投加量、吸附时间、温度等因素对SBA-15-CD吸附U(Ⅵ)的影响.通过扫描电镜(SEM)、X射线粉末衍射(XRD)、BET比表面分析、傅里叶红外光谱(FT-IR)和X射线光电子能谱(XPS)对材料进行表征分析,并探讨了SBA-15-CD吸附U(Ⅵ)的机制.结果表明,当U(Ⅵ)初始浓度为5 mg/L、温度为30℃时,SBA-15-CD吸附U(Ⅵ)的最佳条件为:pH=5、SBA-15-CD投加量0.20 g/L、吸附平衡时间30 min,在此条件下,平衡吸附量为24.4 mg/g,U(Ⅵ)去除率为98.3％.吸附过程符合准二级动力学模型和...

A β-cyclodextrin modified mesoporous silica (SBA-15-CD) material was synthesized by post-grafting using triethoxy (3-isocyanatopropyl)silicon as a crosslinking agent. The effects of solution pH, SBA-15-CD dosage, adsorption time and temperature on the adsorption of U(Ⅵ) on SBA-15-CD were studied by static adsorption test. Scanning electron microscopy (SEM), X-ray powder diffraction (XRD), BET specific surface analysis, Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) were used to characterize the mate...