Extraction of anionic dyes with ionic liquid-nonionic surfactant aqueous two-phase system
SEPARATION SCIENCE AND TECHNOLOGY(2017)
摘要
The cloud point of nonionic surfactant (Triton X-114) in ionic liquid ([Bmim]Cl) aqueous solution exhibits as increase and then decrease and increase again with the increase of ionic liquid (IL) content, which is the origin of an IL-nonionic surfactant aqueous two-phase system. The nonionic surfactant-rich phase coexists with a high content of IL aqueous solution phase in the IL-nonionic surfactant aqueous two-phase system. The partitioning of various ionic dyes indicates that anionic species exhibit a high partitioning coefficient between the IL-rich phase and the nonionic surfactant-rich phase.
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关键词
Aqueous two-phase system,cloud point,dye partitioning,ionic liquid,nonionic surfactant
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