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Highly efficient sorption of U(VI) from aqueous solution using amino/amine-functionalized magnetic mesoporous silica nanospheres |
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| Authors: | Zhou Limin Ouyang Jinbo Liu Zhirong Huang Guolin Wang Yun Li Zhao Adesina Adesoji A |
| Institution: | 1.State Key Laboratory for Nuclear Resources and Environment, East China University of Technology, 418 Guanglan Road, Nanchang, 330013, People’s Republic of China ;2.School of Chemical Sciences and Engineering, University of New South Wales, Sydney, 2035, Australia ; |
| Abstract: | The amino/amine-functionalized magnetic mesoporous silica nanospheres (MSN-DETA) exhibited relatively high sorption capacity (qm?=?153.68 mg/g) as well as excellent selectivity for U(VI). The U4f7/2 X-ray photoelectron spectrometry revealed two binding energies at 380.8?±?0.3 eV (with the proportion of 75.2%) and 382.3?±?0.3 eV, which indicated the inner-surface complexation mechanism. The sorption isotherms fitted well with the Langmuir model, whereas the sorption kinetics could be fitted by pseudo-second-order model. The U(VI)-loaded MSN-DETA could be efficiently regenerated by acidified EDTA (0.4 M). These findings indicated that MSN-DETA could be used as a potential material for the efficient sorption/separation of U(VI) from wastewater. |
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