Citation: SONG Feiyue, XUE Yongbo, GAO Xin, BAI Ling, LI Jing, DENG Yun, XIE Lijuan, RUAN Wenquan. Palladium(Ⅱ) Extraction Using Different Ionic Liquid-Based Aqueous Biphasic Systems[J]. Chinese Journal of Applied Chemistry, ;2019, 36(3): 335-340. doi: 10.11944/j.issn.1000-0518.2019.03.180227 shu

Palladium(Ⅱ) Extraction Using Different Ionic Liquid-Based Aqueous Biphasic Systems

SONG Feiyue ^a ,
XUE Yongbo ^a ,
GAO Xin ^a ,
BAI Ling ^a ,
LI Jing ^a ,
DENG Yun ^a ,
XIE Lijuan ^a ,
RUAN Wenquan ^a,b,c,,

a.
School of Environment & Civil Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
b.
Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi, Jiangsu 214122, China
c.
Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou, Jiangsu 215009, China

Corresponding author: RUAN Wenquan, wqruanjn@gmail.com
Received Date: 28 June 2018
Revised Date: 7 August 2018
Accepted Date: 11 October 2018

Fund Project: the Fundamental Research Funds for the Central Universities JUSRP11521Supported by the Fundamental Research Funds for the Central Universities(No.JUSRP11521)

Figures(4)

To establish a green and efficient method to extract the precious metal palladium, we used an aqueous biphasic system(ABS) formed by "green solvent" ionic liquids and potassium phosphate to extract Pd(Ⅱ) without additional extractants. We also determined the binodal curves and tie-lines of 6 imidazolium-based ionic liquids by turbidity point method. The results indicate that there is no significant difference in phase forming ability and extraction rate between chloride-based and bromide-based ionic liquids. The hydrophobicity of the side chain on the cation is one of the key factors affecting phase forming ability of ionic liquids. Compared to ionic liquid without functional groups on the side chain of cation, the introduction of amino group and nitrile group on the side chain reduces the phase forming ability, but increases the extraction rate by 11.57% and 34.26%, respectively. Moreover, the extraction rate by ionic liquid with nitrile group could reach 100% when the concentrations of ionic liquid and potassium phosphate were 5.00% and 39.55%, respectively. The conclusions of this work could provide theoretical basis and data support for the design or choose of ionic liquids for efficient extraction of palladium(Ⅱ) by its aqueous biphasic system.
- ionic liquid,
- aqueous biphasic system,
- palladium,
- extraction
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