Supported Liquid Membranes Based on Bifunctional Ionic Liquids for Selective Recovery of Gallium
Haitao Zhou,
Yuxi Ye,
Yuefei Tan,
Kailun Zhu,
Xinmin Liu,
Hongjing Tian,
Qingjie Guo,
Lingyun Wang,
Shuju Zhao,
Yang Liu
Affiliations
Haitao Zhou
Key Laboratory of Clean Chemical Processing Engineering of Shandong Province, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
Yuxi Ye
Key Laboratory of Clean Chemical Processing Engineering of Shandong Province, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
Yuefei Tan
Key Laboratory of Clean Chemical Processing Engineering of Shandong Province, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
Kailun Zhu
Key Laboratory of Clean Chemical Processing Engineering of Shandong Province, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
Xinmin Liu
Key Laboratory of Clean Chemical Processing Engineering of Shandong Province, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
Hongjing Tian
Key Laboratory of Clean Chemical Processing Engineering of Shandong Province, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
Qingjie Guo
Key Laboratory of Clean Chemical Processing Engineering of Shandong Province, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
Lingyun Wang
Key Laboratory of Clean Chemical Processing Engineering of Shandong Province, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
Shuju Zhao
Key Laboratory of Clean Chemical Processing Engineering of Shandong Province, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
Yang Liu
College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
In this work, separation and recovery of gallium from aqueous solutions was examined using acid-base bifunctional ionic liquids (Bif-ILs) in both solvent extraction and supported liquid membrane (SLM) processes. The influence of a variety of parameters, such as feed acidity, extractant concentration and metal concentration on the solvent extraction behavior were evaluated. The slope method combined with FTIR spectroscopy was utilized to determine possible extraction mechanisms. The SLM containing Bif-ILs demonstrated highly selective facilitated transport of 96.2% Ga(III) from feed to stripping solution after optimization. During the evaluation of the separation performance of SLM for the transport of Ga(III), in the presence of Al(III), Mg(II), Cu(II) and Fe(II), 88.5% Ga(III) could be transported with only 6% Fe(II) and a nil quantity of other metals co-transported. SLM exhibited excellent long-time stability in five repeated transport cycles. Highly selective transport and separation performance was achieved using the SLM containing Bif-ILs, indicating considerable potential for application in Ga(III) recovery.