Extraction Behavior of Mercury(II) and Cadmium(II) in Ion Liquid Extraction System Using 1-Butyl-3-Methyl-Imidazolium Hexafluorophosphate and 8-Hydroxyl-Quinoline

Abstract:

The extraction behavior of metal ions (Hg²⁺ and Cd²⁺, M²⁺) was investigated in ionic liquid (IL) extraction system using 1-butyl-3-methyl- imidazolium hexafluorophosphate ionic liquid ([Bmim]PF₆) as extraction solvent and 8-hydroxyl-quinoline (HQ) as extractant. The extraction percentage of M²⁺ using [Bmim]PF₆ was less than 5% without HQ. When sufficient HQ was included in IL phase, the extraction percentage of M²⁺ could be higher than 98%. The extracted species in the M²⁺-[Bmim]PF6-HQ system was neutral MQ₂ and the recovery of M²⁺ extracted into [Bmim]PF₆ can be achieved using 0.25 mol•L^-1 HNO₃ as stripping agent. [Bmim]PF₆ can be recycled in the experiment.

• Periodical: Applied Mechanics and Materials (Volumes 117-119)
• Pages: 1103-1106
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.117-119.1103
• Online since: October 2011
• Authors: Zhong Wei Pan, Chang Ma, Hai Long Zhou, Ting Lian, Chuan Ye Lai, Cheng Li
• Keywords: 8-Hydroxyquinoline, Cd²⁺, Extraction, Hg²⁺, Ionic Liquid (IL)

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