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| Study on Removal of U(VI) in Aqueous Solution with Nano-zero-valent Nickel |
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Received:November 14, 2018
Revised:November 22, 2018
Accepted:November 23, 2018
Published Online:January 24, 2019
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| DOI：doi：10.3969/j.issn.1007-7545.2019.02.016 |
| KeyWord:nano-zero-valent nickel; uranium; removal |
| Author | Institution |
| Chen Yu-Jie |
东华理工大学核资源与环境国家重点实验室 |
| Li Xiao-yan |
东华理工大学核资源与环境国家重点实验室 |
| Liu Xue |
东华理工大学核资源与环境国家重点实验室 |
| Liu Chen |
东华理工大学核资源与环境国家重点实验室 |
| Zhang Zi-han |
东华理工大学核资源与环境国家重点实验室 |
| Sang Wei-xuan |
东华理工大学核资源与环境国家重点实验室 |
| Chen Rong |
东华理工大学核资源与环境国家重点实验室 |
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| Abstract: |
| Nano-zero-valent nickel was prepared by liquid-phase reduction method and used to remove U(VI) from aqueous solution. Micro-morphologies of the materials before and after reaction were characterized by SEM and EDS. Removal mechanism was studied based on thermodynamics. The results show that nano-zero-valent nickel has good removal effect on U(VI) from aqueous solution. Removal rate and capacity of U(VI) is 98.44% and 182.372 mg/g respectively under the conditions including room temperature, pH value of 4.0, contact time of 60 min, ratio of solid to liquid of 0.3 g/L, and initial concentration of 50 mg/L. Particle size of nano-zero-valent nickel is obviously spherical with uniform dispersion. After reaction, surface morphology of the material change to irregular fragments accumulation and particle sizes become larger, and U elements appear in the material. Thermodynamic studies show that the reaction is spontaneous endothermic and irreversible with increasing entropy. |
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