Efficient removal of U(vi) from simulated seawater with hyperbranched polyethylenimine (HPEI) covalently modified SiO2 coated magnetic microspheres. Issue 6 (17th April 2018)

• Record Type: Journal Article
• Authors: Li, Wenting; Liu, Qi; Chen, Rongrong; Yu, Jing; Zhang, Hongsen; Liu, Jingyuan; Li, Rumin; Zhang, Milin; Liu, Peili; Wang, Jun
• Is Part Of: Inorganic chemistry frontiers. Volume 5:Issue 6(2018)
• Page Start: 1321
• Page End: 1328
• Publication Date: 2018-04-17
• Subjects: Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c8qi00198g
• Languages: English
• ISSNs: 2052-1553

Abstract

Abstract : Hyperbranched polyethylenimine (HPEI) covalently modified SiO2 coated magnetic microspheres were prepared for the efficient U(vi ) removal from simulated seawater. Abstract : Herein, we report on magnetic microspheres with numerous imine groups on the surface, which have great potential for U(vi ) recovery in seawater. Hyperbranched polyethylenimine (HPEI) was covalently grafted onto the surface of the core–shell structured microspheres Fe3 O4 @SiO2 . The microstructure and chemical composition of Fe3 O4 @SiO2 -HPEI were comprehensively characterized. Consequently, the adsorption performance at low concentrations (3–30 μg L −1 ) under simulated seawater was investigated and the removal rate reached more than 90%. The superior performance of the Fe3 O4 @SiO2 -HPEI is attributed to electrostatic force and chemical bonding (between amine/imine groups and U(vi )). We recommend, therefore, Fe3 O4 @SiO2 -HPEI as a prospective alternative adsorbent in U(vi ) recovery from seawater.