Extraction of Metal Ions from Aqueous Solutions Using Imidazolium Based Ionic Liquids |
| |
Authors: | Urszula Domańska Anna Rękawek |
| |
Institution: | (1) Physical Chemistry Division, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland |
| |
Abstract: | This article represents a step towards how to choose an ionic liquid as the solvent to improve metal ion (Ag+ and Pb2+) extraction. The liquid-liquid solvent extraction is proposed with the following imidazolium ionic liquids (ILs): 1-ethyl-3-ethylimidazolium,
or 1-butyl-3-ethylimidazolium, or 1-hexyl-3-ethylimidazolium bis{(trifluoromethyl)sylfonyl}imide EEIM]NTf2], or BEIM]NTf2], or HEIM]NTf2], or 1-butyl-3-ethylimidazolium hexafluorophosphate BEIM]PF6], or 1-hexyl-3-ethylimidazolium hexafluorophosphate HEIM]PF6] and the popular 1-butyl-3-methylimidazolium hexafluorophosphate BMIM]PF6] for comparison. The effect of anion type (NTf2− versus PF6−) and the effect of structural components of an ionic liquid including alkyl chain length at the cation and the ethyl substituent
instead methyl at the cation, on the extraction and re-extraction processes by using dithizone as a metal chelator, were studied
at 296 K. Dithizone was employed to form neutral metal-dithizone complexes with heavy metal ions to extract them from aqueous
solution into the ILs.
Electronic Supplementary Material The online version of this article () contains supplementary material, which is available to authorized users.
Presented at the 236th ACS National Meeting, August 17–21, Philadelphia, USA. |
| |
Keywords: | 1-Alkyl-3-ethylimidazolium hexafluorophosphate Hexafluorophosphate Solvent extraction Metal ions extraction Dithizone |
本文献已被 SpringerLink 等数据库收录! |
|