期刊
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
卷 311, 期 3, 页码 2061-2068出版社
SPRINGER
DOI: 10.1007/s10967-017-5181-6
关键词
Liquid-solid extraction; Polyvinyl alcohol; 4 '-formoxylbenzo-15-crown-5 ether; Lithium isotopes separation; Separation factor
资金
- National Natural Science Foundation of China [21376176, 51303130]
- Chang-jiang Scholars and Innovative Research Team in the University of Ministry of Education, China [IRT13084]
- Science and Technology Plans of Tianjin [15PTSYJC00240]
- China Scholarship Council
A film material, polyvinyl alcohol-graft-benzo-15-crown-5 ether (PVA-g-B15C5) for lithium isotope separation by liquid-solid extraction was prepared from polyvinyl alcohol (PVA) and 4'-formoxylbenzo-15-crown-5 ether (FB15C5). The effect of immobilization amount of crown ether on film, the counter anion of lithium salt, extraction solvent and temperature on separation factor were explored in detail. The maximum separation factor 1.060 +/- 0.002 was obtained by an isopropanol-LiI/PVA-g-B15C5 film system at 20 degrees C. The heavy isotope, Li-7 was enriched in the film phase owning to a stronger bonding environments from the synergistic effect of B15C5 and hydrophilic PVA as well as the linking groups.
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