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In Situ Anchoring of Pyrrhotite on Graphitic Carbon Nitride Nanosheet for Efficient Immobilization of Uranium |
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| Authors: | Xuan Hao Dr Hongsen Zhang Dr Qi Liu Dr Jingyuan Liu Dr Rongrong Chen Dr Jing Yu Prof Milin Zhang Peili Liu Prof Jun Wang |
| Institution: | 1. Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin, 150001 P.R. China
College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001 P.R. China;2. Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin, 150001 P.R. China;3. Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin, 150001 P.R. China Institute of Advanced Marine Materials, Harbin Engineering University, Harbin, 150001 P.R. China College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001 P.R. China;4. Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin, 150001 P.R. China College of Science, Heihe University, Heihe, 164300 P.R. China;5. Institute of Advanced Marine Materials, Harbin Engineering University, Harbin, 150001 P.R. China |
| Abstract: | Enrichment of UVI is an urgent project for nuclear energy development. Herein, magnetic graphitic carbon nitride nanosheets were successfully prepared by in situ anchoring of pyrrhotite (Fe7S8) on the graphitic carbon nitride nanosheet (CNNS), which were used for capturing UVI. The structural characterizations of Fe7S8/CNNS-1 indicated that the CNNS could prevent the aggregation of Fe7S8 and the saturation magnetization was 4.69 emu g?1, which meant that it was easy to separate the adsorbent from the solution. Adsorption experiments were performed to investigate the sorption properties. The results disclosed that the sorption data conformed to the Langmuir isotherm model with the maximum adsorption capacity of 572.78 mg g?1 at 298 K. The results of X-ray photoelectron spectroscopy (XPS) demonstrated that the main adsorption mechanism are as follows: UVI is adsorbed on the surface of Fe7S8/CNNS-1 through surface complexation initially, then it was reduced to insoluble UIV. Thereby, this work provided an efficient and easy to handle sorbent material for extraction of UVI. |
| Keywords: | graphitic carbon nitrides nanosheets pyrrhotites simulated seawater uranium |