TY - JOUR
T1 - An ionic liquid extractant dissolved in an ionic liquid diluent for selective extraction of Li(I) from salt lakes
AU - Cai, Chunqing
AU - Hanada, Takafumi
AU - Fajar, Adroit T.N.
AU - Goto, Masahiro
N1 - Funding Information:
The authors are grateful for the financial assistance by the Environment Research and Technology Development Fund (Grant No. 3-2004 ) from the Ministry of the Environment of Japan. C. Cai was supported by the China Scholarship Council (CSC). The authors appreciate the instrument support provided by the Center of Advanced Instrumental Analysis and the Service Center of the Elementary Analysis of Organic Compounds, Faculty of Science, Kyushu University. We thank Edanz Group ( https://en-author-services.edanz.com/ac ) for editing a draft of this manuscript.
Funding Information:
The authors are grateful for the financial assistance by the Environment Research and Technology Development Fund (Grant No. 3-2004) from the Ministry of the Environment of Japan. C. Cai was supported by the China Scholarship Council (CSC). The authors appreciate the instrument support provided by the Center of Advanced Instrumental Analysis and the Service Center of the Elementary Analysis of Organic Compounds, Faculty of Science, Kyushu University. We thank Edanz Group (https://en-author-services.edanz.com/ac) for editing a draft of this manuscript.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/8/1
Y1 - 2021/8/1
N2 - An efficient recovery of lithium (Li(I)) from salt lakes is currently a challenging issue. Herein, we report a feasible extraction of Li(I) from a simulated salt lake solution using a novel extraction system, in which a functionalized ionic liquid (FIL) is dissolved in a different ionic liquid diluent. As a functional extractant, 3-methyl-1-octylimidazolium thenoyltrifluoroacetone [Omim][TTA] was successfully prepared in a simple way and its extraction performance for Li(I) was evaluated. The effects of pH and metal concentration on extraction, as well as the stripping property, were systematically investigated. It was found that the FIL could effectively act as the extractant of Li(I) over a wide range of pH, and even under acidic conditions. The extraction ability of the FIL was markedly enhanced by its use in an ionic liquid diluent. The obtained results demonstrated that Li(I) was extracted from the aqueous solution into the ionic liquids with a high extraction efficiency even in a five-cycle reusability test. Furthermore, using a simulated salt lake solution, Li(I) was selectively extracted with a high separation factor of 227 over Na(I), whereas Na(I) and K(I) remained in the aqueous feed solution.
AB - An efficient recovery of lithium (Li(I)) from salt lakes is currently a challenging issue. Herein, we report a feasible extraction of Li(I) from a simulated salt lake solution using a novel extraction system, in which a functionalized ionic liquid (FIL) is dissolved in a different ionic liquid diluent. As a functional extractant, 3-methyl-1-octylimidazolium thenoyltrifluoroacetone [Omim][TTA] was successfully prepared in a simple way and its extraction performance for Li(I) was evaluated. The effects of pH and metal concentration on extraction, as well as the stripping property, were systematically investigated. It was found that the FIL could effectively act as the extractant of Li(I) over a wide range of pH, and even under acidic conditions. The extraction ability of the FIL was markedly enhanced by its use in an ionic liquid diluent. The obtained results demonstrated that Li(I) was extracted from the aqueous solution into the ionic liquids with a high extraction efficiency even in a five-cycle reusability test. Furthermore, using a simulated salt lake solution, Li(I) was selectively extracted with a high separation factor of 227 over Na(I), whereas Na(I) and K(I) remained in the aqueous feed solution.
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U2 - 10.1016/j.desal.2021.115073
DO - 10.1016/j.desal.2021.115073
M3 - Article
AN - SCOPUS:85104088771
SN - 0011-9164
VL - 509
JO - Desalination
JF - Desalination
M1 - 115073
ER -