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Hu Y, Qin B, Li X, Yang F, Lee CP, Xie M, Xue L. Ultraselective Extraction Reprocessing of 99TcO 4-/ReO 4- with a Promising Carbamic Acid Extractant System. Inorg Chem 2023; 62:1530-1538. [PMID: 36640371 DOI: 10.1021/acs.inorgchem.2c03708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
With the development of nuclear energy, the reprocessing of 99TcO4-/ReO4- has become a very difficult problem due to environmental issues such as high output, long life, and easy leakage. In this study, three extraction systems containing carbamic acid were introduced into the reprocessing of 99TcO4-/ReO4- for the first time. The results involving one of the three results show that N-[N,N-di(2-ethylhexyl) aminocarbonylmethyl] glycine (D2EHAG) has ultrahigh selectivity for removal to 99TcO4-/ReO4-. When the extreme concentration ratio of SO42- and Cl- to ReO4- of D2EHAG is 10,000:1, the distribution coefficient of ReO4- still reaches 12.73 and 2.67, respectively. Additionally, the most hydrophilic NO3-, when the extreme concentration ratio of NO3- and ReO4- is 1000:1, still has a distribution coefficient close to 2.33, which is more than the most reported MOF adsorption materials. Moreover, the reaction kinetics, stripping rate, and reuse rate were studied. After five cycles, the removal rate is still 98.12%, with a decrease of less than 0.7%. The system containing carbamic acid is a potential extraction removal system to remove 99TcO4-/ReO4- from nuclear radioactive wastewater.
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Affiliation(s)
- Yanqin Hu
- Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen361021, China.,School of Nuclear Science and Engineering, East China University of Technology, Nanchang330013, China
| | - Ben Qin
- Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen361021, China
| | - Xiaoyan Li
- School of Nuclear Science and Engineering, East China University of Technology, Nanchang330013, China
| | - Fan Yang
- Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen361021, China.,Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian350108, P. R. China.,Fujian Province Joint Innovation Key Laboratory of Fuel and Materials in Clean Nuclear Energy System, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou350002, China.,Advanced Energy Science and Technology Guangdong Laboratory, Huizhou516003, China.,Sichuan Jcc Rare Earth Metals New Material Co., LTD, Chengdu610213, China
| | - Chuan-Pin Lee
- School of Nuclear Science and Engineering, East China University of Technology, Nanchang330013, China
| | - Meiying Xie
- Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen361021, China.,Fujian Province Joint Innovation Key Laboratory of Fuel and Materials in Clean Nuclear Energy System, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou350002, China
| | - Liyan Xue
- Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen361021, China.,Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian350108, P. R. China
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Hou X, Tang SF. Speciation of Ionic Uranyl-Containing Complexes in in Situ Formed Dicyanonitrosomethanide-Based Ionic Liquids. Inorg Chem 2021; 60:1869-1876. [PMID: 33471501 DOI: 10.1021/acs.inorgchem.0c03316] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A series of ionic uranyl-containing complexes, namely [C2mim]2[UO2(ccnm)4] (1), [C4mim]2[UO2(ccnm)4] (2), [N1111]2[UO2(ccnm)4][H2O]2 (3), and [P2444]2[UO2(dcnm)2(ccnm)2] (4) [(ccnm)- = carbamoylcyanonitrosomethanide; dcnm = dicyanonitrosomethanide; (C2mim)+ = 1-ethyl-3-methylimidazolium; (C4mim)+ = 1-butyl-3-methylimidazolium; (N1111)+ = tetramethylammonium; (P2444)+ = tributyl(ethyl)phosphonium)], were isolated from in situ formed dcnm-based ionic liquids and characterized systematically. It was found that the dcnm anions transformed into ccnm anions during the reactions. These anions coordinate with the uranyl cations in chelate or terminal monodentate coordination mode, affording negative divalent complex anions which can combine with different organic cations and form ionic uranyl-containing complexes. Plenty of C-H···O, N-H···O, C-H···N, N-H···N, and H···H weak interactions are formed in the crystal structures. The transformation of cyano to amide groups contributes to the crystallinity and leads to higher melting points as well as the luminescence quenching of these compounds.
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Affiliation(s)
- Xiaomin Hou
- Shandong Province Key Laboratory of Applied Mycology, College of Life Science, Changcheng Road 700, Chengyang District, Qingdao 266109, China
| | - Si-Fu Tang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Changcheng Road 700, Chengyang District, Qingdao 266109, China
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