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A ternary mechanism for the facilitated transfer of metal ions into room-temperature ionic liquids (RTILs): implications for the “greenness” of RTILs as extraction solvents
Abstract
Partitioning of sodium ions between aqueous nitrate media and 1-alkyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imides (Cnmim+Tf2N−) in the presence of dicyclohexano-18-crown-6 is shown to take place via as many as three pathways: conventional nitrato complex extraction and/or either or both of two ion-exchange processes, the relative importance of which is determined by aqueous acidity and the hydrophobicity of the ionic liquid cation. Contrary to expectations, increasing the alkyl chain length of the IL cation (from C5mim+ to C10mim+) is insufficient to eliminate the possibility of ion exchange as a mode of metal ion partitioning between the two phases, an observation with negative implications for the utility of ILs as environmentally benign extraction solvents.
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Cited by
Ionic Liquids-Based Extraction: A Promising Strategy for the Advanced Nuclear Fuel Cycle
Sun, X., Luo, H., & Dai, S. (2012) · Chemical Reviews · doi:10.1021/cr200193x · Cited by 852
Recovery of lithium from high Mg/Li ratio salt-lake brines using ion-exchange with NaNTf2 and TBP
Bai, R., Wang, J., Wang, D., Cui, J., & Zhang, Y. (2022) · Hydrometallurgy · doi:10.1016/j.hydromet.2022.105914 · Cited by 41
Kaul, M. J., Mandella, V., & Dietz, M. L. (2022) · Talanta · doi:10.1016/j.talanta.2022.123373 · Cited by 27
Self-citationWang, X., Numedahl, N., & Jiang, C. (2024) · Applied Geochemistry · doi:10.1016/j.apgeochem.2024.106126 · Cited by 22
Pirkwieser, P., López-López, J. A., Schagerl, M., Kandioller, W., Keppler, B. K., Moreno, C., & Jirsa, F. (2020) · Applied Sciences · doi:10.3390/app10093157 · Cited by 13
Metadata
- Authors
- Dietz, M. L., & Stepinski, D. C.
- Venue
- Green Chemistry
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2005
- Volume
- 7
- Issue
- 10
- Pages
- 747
- ISSN
- 1463-9262 (ISSN-L)
- 1463-9270
- OpenAlex
- W2169727135
- Cited by
- 192
- References
- 0
- FWCI
- 3.02
- Type
- journal article
- Language
- en
- Open access
- closed
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- Dietz, M. L., & Stepinski, D. C. (2005). A ternary mechanism for the facilitated transfer of metal ions into room-temperature ionic liquids (RTILs): implications for the “greenness” of RTILs as extraction solvents. Green Chemistry. https://doi.org/10.1039/b508604c
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