Journal
INORGANIC CHEMISTRY FRONTIERS
Volume 5, Issue 6, Pages 1321-1328Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8qi00198g
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Funding
- Application Technology Research and Development Projects of Harbin [2015RAQXJ038]
- International Science & Technology Cooperation Program of China [2015DFA50050]
- National Natural Science Foundation of China [NSFC51603053]
- Application Technology Research and Development Plan of Heilongjiang Province [GX16A009]
- Major Project of Science and Technology of Heilongjiang Province [GA14A101]
- Fundamental Research Funds of the Central University [HEUCFM171010]
- Natural Science Foundation of Heilongjiang Province [B2015021]
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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 Fe3O4@SiO2. The microstructure and chemical composition of Fe3O4@SiO2-HPEI were comprehensively characterized. Consequently, the adsorption performance at low concentrations (3-30 g L-1) under simulated seawater was investigated and the removal rate reached more than 90%. The superior performance of the Fe3O4@SiO2-HPEI is attributed to electrostatic force and chemical bonding (between amine/imine groups and U(vi)). We recommend, therefore, Fe3O4@SiO2-HPEI as a prospective alternative adsorbent in U(vi) recovery from seawater.
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