Separation of Lithium Isotopes by Electromigration with Aqueous-Organic Biphase System
The separation of lithium isotopes is of great importance to the development of the nuclear indus-try.The effect of factors such as electric field,crown ether,time on lithium isotope separation effect was in-vestigated systematically based on"aqueous solution|organic solution|aqueous solution"electromigration system.It was found that the introduction and enhancement of electric field improved the migration ability of lithium ions in organic solution.The anode solution and organic solution tended to enrich 7Li,while the cathode solution tended to enrich 6Li.The introduction of crown ether significantly enhanced the enrichment of lithium isotope in each section of the system.The anode solutions and organic solutions tended to enrich 7Li,and the cathode solutions tended to enrich 6Li.There is a synergic effect of electromigration,chelation and diffusion in the electromigration process of lithium isotope separation.The two chemical forms of lithium ions complexed with crown ether and not complexed with crown ether in organic solution have dif-ferent response to high-pressure electric field(≥10 V).The lithium isotope enrichment in each section of the system depended on the combined action of above factors.
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