Preparation of carbon coated Fe3O4 nanoparticles for magnetic separation of uranium |
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| Institution: | 1. Department of Chemical Engineering, Chengde Petroleum College, 067000, PR China;2. College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China;3. The Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, PR China;1. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People''s Republic of China;2. University of Science and Technology of China, Hefei 230026, People''s Republic of China;3. High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, People''s Republic of China;4. Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People''s Republic of China;1. School of Physics and Electrical Engineering, Anyang Normal University, Anyang 455000, PR China;2. Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, PR China |
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| Abstract: | Uranium(VI) was removed from aqueous solutions using carbon coated Fe3O4 nanoparticles (Fe3O4@C). Batch experiments were conducted to study the effects of initial pH, shaking time and temperature on uranium sorption efficiency. It was found that the maximum adsorption capacity of the Fe3O4@C toward uranium(VI) was ～120.20 mg g?1 when the initial uranium(VI) concentration was 100 mg L?1, displaying a high efficiency for the removal of uranium(VI) ions. Kinetics of the uranium(VI) removal is found to follow pseudo-second-order rate equation. In addition, the uranium(VI)-loaded Fe3O4@C nanoparticles can be recovered easily from aqueous solution by magnetic separation and regenerated by acid treatment. Present study suggested that magnetic Fe3O4@C composite particles can be used as an effective and recyclable adsorbent for the removal of uranium(VI) from aqueous solutions. |
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| Keywords: | Uranium Adsorption Desorption |
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