Citation: SHI Jin-Qiang, YUAN Wei-Jin, DONG Zhen, ZHAO Long, WEI Yue-Zhou, HE Lin-Feng, TANG Fang-Dong. Extraction Behavior of Eu³⁺ and UO₂²⁺ Using CMPO/[C_nmim][NTf₂] Systems[J]. Chinese Journal of Inorganic Chemistry, ;2016, 32(3): 414-420. doi: 10.11862/CJIC.2016.048 shu

Extraction Behavior of Eu³⁺ and UO₂²⁺ Using CMPO/[C_nmim][NTf₂] Systems

1.
School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2.
Division of Chemistry and Ionizing Radiation Measurement Technology, Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, China

Corresponding author: ZHAO Long, ryuuchou@sjtu.edu.cn; ryuuchou@hotmail.com
Received Date: 30 August 2015
Revised Date: 22 December 2015

Figures(5)

The extraction behavior of Eu³⁺ and UO₂²⁺ from nitric acid solution with n-Octyl (phenyl)-N, N diisobu-tylcarbamoylmethylphosphine oxide (CMPO) dissolved in hydrophobic ionic liquid [C_nmim][NTf₂] (n=2, 8, 12) was studied. The extraction efficiency (E) of Eu³⁺ and UO₂²⁺ in CMPO/[C_nmim][NTf₂] was measured as a function of various parameters such as contact time, the concentrations of nitric acid, CMPO and temperature. CMPO/[C₂mim][NTf₂] system was selected for lanthanide and actinide partitioning from simulated high level waste (SHLW). The results showed that the extraction equilibrium time extended gradually with the increasing of the chain length of the ionic liquid. The E values for Eu³⁺ decreased while that for UO₂²⁺ increased with the increasing of acidity. The extraction process was endothermic for UO₂²⁺ while the same was for Eu³⁺ it was exothermic. The extraction mechanism was suggested that the extraction proceed via ion exchange mechanism for Eu³⁺ while that for UO₂²⁺ via neutral complex. Actinides (An) and lanthanides (Ln) could be extracted effectively from SHLW. And to some extent, An/Ln separation effectiveness was observed under high acidity using CMPO/[C₂mim][NTf₂] system.
- Eu³⁺,
- UO₂²⁺,
- octyl (phenyl)-N, N-diisobutylcarbamoylmethylphosphine oxide,
- ionic liquid,
- extraction
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沈阳化工大学材料科学与工程学院沈阳 110142

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Extraction Behavior of Eu³⁺ and UO₂²⁺ Using CMPO/[C_nmim][NTf₂] Systems