北京大学学报（自然科学版）2017，Vol.53Issue(5)：810-816,7.DOI:10.13209/j.0479-8023.2017.074
离子液体萃取锝和铼的研究
Extraction of Technetium and Rhenium with Ionic Liquid
摘要
Abstract
The extraction of ReO4? and TcO4? by ionic liquids (ILs) were investigated systematically. The results indicated that imidazolium and quaternary ammonium ILs could extract ReO4? and TcO4? efficiently via anion-exchange mechanism. Compared with NTf2-based ILs, PF6-based ILs had a higher extraction efficiency towards ReO4? and TcO4?. With respect to the ILs with an identical anion, the extraction efficiency increased with the increase of the chain length of IL's cations. The addition of HNO3 and IL's anion in aqueous phase decreased the extraction efficiency, while the increase of the concentration of IL's cation led to an opposite effect. At a lower concentration of nitric acid, ReO4? ions were selectively extracted by either [N6,444][NTf2] or [C8mim][PF6] from simulated liquid waste. KPF6 and LiNTf2 aqueous solutions can strip ReO4? effectively from [C8mim][PF6] and [N6,444][NTf2], respectively.关键词
离子液体/ReO4−/TcO4−/萃取选择性/萃取机理Key words
ionic liquid/ReO4−/TcO4−/extraction selectivity/extraction mechanism分类
化学化工引用本文复制引用
宋岳,孙涛祥,陈庆德,沈兴海..离子液体萃取锝和铼的研究[J].北京大学学报（自然科学版）,2017,53(5):810-816,7.基金项目
国家自然科学基金(91226112)资助 （91226112）
