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Dong Y, Zhu Q, Zou W, Fang J, Yang Z, Xu T. Dibenzo-15-crown-5-based Tröger's Base membrane for 6Li+/7Li+ separation. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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2
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Tong B, Guo G, Meng X, Bai P, Lyu J, Guo X. Highly efficient lithium adsorption and stable isotope separation by metal-organic frameworks. Chem Commun (Camb) 2022; 58:8866-8869. [PMID: 35856683 DOI: 10.1039/d2cc02421g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effects of a series of MOFs on the adsorption and separation of lithium isotopes were investigated in this paper. Seven kinds of MOF were prepared, and the characterization studies of MIL-100(Fe) before and after adsorption by X-ray photoelectron spectroscopy (XPS) demonstrated the potential chemical interaction between Fe and Li. The influence of metal ions, counter-ions and solvents on the adsorption capacity and separation factor was investigated. The maximum separation factor can reach 1.048 ± 0.001. MIL-100(Fe) also has good regeneration performance.
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Affiliation(s)
- Bo Tong
- Department of Pharmaceutical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P. R. China.,Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, 300072, P. R. China
| | - Guijie Guo
- Department of Pharmaceutical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P. R. China.,Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, 300072, P. R. China
| | - Xiangyunxiu Meng
- Department of Pharmaceutical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P. R. China.,Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, 300072, P. R. China
| | - Peng Bai
- Department of Pharmaceutical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P. R. China.,Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, 300072, P. R. China
| | - Jiafei Lyu
- Department of Pharmaceutical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P. R. China.,Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, 300072, P. R. China
| | - Xianghai Guo
- School of Marine Science and Technology, Tianjin University, Tianjin 300072, P. R. China. .,Key Laboratory of Ocean Observation Technology of Ministry of Natural Resources, School of Marine Science and Technology, Tianjin University, Tianjin 300072, P. R. China
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Zeng Y, Pei H, Wang Z, Yan F, Li J, Cui Z, He B. Chitosan- graft-benzo-15-crown-5-ether/PVA Blend Membrane with Sponge-Like Pores for Lithium Isotope Adsorptive Separation. ACS OMEGA 2018; 3:554-561. [PMID: 31457913 PMCID: PMC6641451 DOI: 10.1021/acsomega.7b01625] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 01/02/2018] [Indexed: 06/01/2023]
Abstract
Crown ether exhibits a high separation coefficient for lithium isotope separation owing to its precise size selectivity to cations. A crown ether-based solid-liquid extraction method for the lithium isotope separation with a high extraction efficiency is regarded as a valid alternative to the classic liquid-liquid method. A chitosan-graft-benzo-15-crown-5-ether (CTS-g-B15C5)/polyvinyl alcohol (PVA) porous blend membrane for lithium isotope adsorptive separation was fabricated by immersion-precipitation-phase inversion. Results indicated that the finger-like structure of the blend membrane was replaced gradually by a sponge-like structure with the increase of the CTS-g-B15C5 concentration from 20 to 50 wt %. Meanwhile, the porosity and mechanical strength of the blend membrane slightly decreased from 76.9% and 2.68 MPa to 72.5% and 2.02 MPa, respectively, whereas the average pore size increased from 0.33 to 0.73 μm. The obtained CTS-g-B15C5/PVA (50/50 wt/wt) blend membrane exhibited a sponge-like asymmetrical gradient structure and good mechanical strength and used for the solid-liquid extraction experiment. It is found that the distribution coefficient increased from 13.50 to 49.33, and the single-stage separation factor increased from 1.008 to 1.046 with the immobilization amount of crown ether from 1.07 to 2.60 mmol·g-1. It also meets the acceptable separation factor of 1.03 in a large scale of lithium isotope separation. In addition, 6Li and 7Li were enriched in the solid or membrane phase and the aqueous phase, respectively. In summary, the blend membrane has great potential applications in the development of green and highly efficient membrane chromatography for lithium isotope separation.
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Affiliation(s)
- Yan Zeng
- State
Key Laboratory of Separation Membranes and Membrane Processes/National
Center for International Joint Research on Membrane Science and Technology, School of Materials
Science and Engineering, and School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, P. R. China
| | - Hongchang Pei
- State
Key Laboratory of Separation Membranes and Membrane Processes/National
Center for International Joint Research on Membrane Science and Technology, School of Materials
Science and Engineering, and School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, P. R. China
| | - Zhen Wang
- State
Key Laboratory of Separation Membranes and Membrane Processes/National
Center for International Joint Research on Membrane Science and Technology, School of Materials
Science and Engineering, and School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, P. R. China
| | - Feng Yan
- State
Key Laboratory of Separation Membranes and Membrane Processes/National
Center for International Joint Research on Membrane Science and Technology, School of Materials
Science and Engineering, and School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, P. R. China
| | - Jianxin Li
- State
Key Laboratory of Separation Membranes and Membrane Processes/National
Center for International Joint Research on Membrane Science and Technology, School of Materials
Science and Engineering, and School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, P. R. China
| | - Zhenyu Cui
- State
Key Laboratory of Separation Membranes and Membrane Processes/National
Center for International Joint Research on Membrane Science and Technology, School of Materials
Science and Engineering, and School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, P. R. China
| | - Benqiao He
- State
Key Laboratory of Separation Membranes and Membrane Processes/National
Center for International Joint Research on Membrane Science and Technology, School of Materials
Science and Engineering, and School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, P. R. China
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Yan F, Pei H, Pei Y, Li T, Li J, He B, Cheng Y, Cui Z, Guo D, Cui J. Preparation and Characterization of Polysulfone-graft-4′-aminobenzo-15-crown-5-ether for Lithium Isotope Separation. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b00314] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | | | | | | | | | | | - Dongfa Guo
- Center
of Analysis, Beijing Research Institute of Uranium Geology, Beijing 100029, People’s Republic of China
| | - Jianyong Cui
- Center
of Analysis, Beijing Research Institute of Uranium Geology, Beijing 100029, People’s Republic of China
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