陕西科技大学学报（自然科学版）2017，Vol.35Issue(1)：23-27,61,6.
羧基改性磁性Fe3 O4的制备及吸铬性能研究
Study on preparation and adsorption for Cr (Ⅲ)of carboxyl-modified Fe3 O4 magnetic nanomaterials
摘要
Abstract
The Fe3 O4 magnetic nanoparticles were prepared by co-precipitation method,and they were modified by citric acid to obtain the carboxyl-functionalized Fe3 O4 magnetic adsor-bent.The materials before and after being modifying were characterized by XRD,TEM,FT-IR,and TGA respectively.The results indicated that the crystal structure of the particles did not change before and after modification and the carboxyl functional groups were successfully grafted on the surface of Fe3 O4 .The magnetic adsorbent was then used to remove Cr (Ⅲ) from aqueous solution.The adsorption results showed that the optimal adsorption effiency for 30 mg/L chromium solution was obtained within 60 minutes when 0.15 g adsorbents were applied at 30 ℃ and pH 6,the rate of removal was increased to 92.06%.The adsorption capacity conformed to the freundlich isotherm equation model and the pseudo-second-order kinetic model.关键词
羧基改性/Fe3 O4/磁性/三价铬/吸附Key words
carboxyl-modified/Fe3 O4/magnetic/Cr (Ⅲ)/adsorption分类
环境科学引用本文复制引用
李闻欣,李珺,张金金..羧基改性磁性Fe3 O4的制备及吸铬性能研究[J].陕西科技大学学报（自然科学版）,2017,35(1):23-27,61,6.基金项目
山东德信皮业有限公司研究基金项目 （）
