中文摘要：

以工业水玻璃为硅源,采用六甲基二硅胺烷（HMDZ）作为改性剂,掺杂纳米级Fe3O4,通过溶胶-凝胶、常压干燥技术,制备得到赋磁硅气凝胶吸附材料（MSA）。采用红外光谱（FTIR）、扫描电镜（SEM）、比表面分析（BET）及振动样品磁强计（VSM）等方法对其结构进行了表征,并对其吸附性能进行研究。结果表明,制得的赋磁硅气凝胶接触角在113°～116°之间,比表面积可达589.79 m2/g,密度约为0.192 g/cm3,饱和磁化强度约为0.44 emu/g,具有超顺磁性。赋磁硅气凝胶对疏水性有机物异狄氏剂表现出良好的吸附性能,符合Freundlich等温吸附模型,KF为42.91;吸附动力学符合准二级动力学模型,吸附速率常数为0.0341 g/（mg.min）。

英文摘要：

A novel magnetic silica aerogel（MSA） was prepared from cheap waterglass precursors and Fe3O4 particles via sol-gel process,surface modification and ambient pressure drying.Fourier transform infrared spectroscopy（FTIR）,scanning electron microscope（SEM）,nitrogen adsorption BET surface analysis and vibrating sample magnetometer（VSM） measurements were used to characterize the properties of the MSA.The results showed that the MSA was hydrophobic with contact angles of 113°-116° and super-paramagnetic with saturate magnetization of 0.44 emu/g.The MSA had low density of 0.192 g/cm3,and large surface area of 589.79 m2/g.The adsorption results indicated that the MSA had good adsorption properties for removal of endrin,the adsorption isotherms were fitted by Freundlich model,and the value of KF was 42.91.The adsorption process followed the pseudo-second-order kinetics process with the kinetics constant of 0.0341 g/（mg·min）.