Task-specific ionic liquids for the extraction of metal ions from aqueous solutions

Abstract

Imidazolium cations, such as those commonly used in preparing ionic liquids (ILs) can easily be derivatized to include task-specific functionality, such as metal ligating groups that when used as part of the solvent or doped into less expensive ILs, dramatically enhance the partitioning of targeted metal ions into the IL phase from water; the strategy of preparing task-specific ILs is applicable to a wide range of designer solvent needs.

Selective Extraction of Copper, Mercury, Silver, and Palladium Ions from Water Using Hydrophobic Ionic Liquids

“…[22][23][24][25] Task-specific ionic liquids (TSIL), can extract cations without ion-exchange. [26][27][28] TSILs are ionic liquids with functional groups appended to the cation. Some TSILs appear to be efficient for extraction with high selectivity for some metal ions such as mercury, cadmium, 27,28 or actinides.…”

“…[26][27][28] TSILs are ionic liquids with functional groups appended to the cation. Some TSILs appear to be efficient for extraction with high selectivity for some metal ions such as mercury, cadmium, 27,28 or actinides. 26 In this work, we investigate the ability of selected ionic liquids to extract offensive or valuable cations from water.…”

“…[9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] Because the properties of ionic liquids are tunable, it may be possible to identify some ionic liquids that have low viscosity, very low solubility in water, and high affinity for selected metal ions. [29][30][31][32][33][34][35][36][37][38][39][40][41] Previous reports show that ionic liquids containing imidazolium cations with alkyl chains and [PF 6 ] -anion are not useful for extraction of cations from water.…”

Layer-by-layer encapsulated nano-emulsion of ionic liquid loaded with functional material for extraction of Cd2+ ions from aqueous solutions

“…More specifically, hydrophobic ionic liquids may be used for the separation of metal ions from aqueous solutions and wastewaters, where they can be specifically designed to act as extractors themselves [5] or, more commonly, serve as an extraction medium for active materials, such as crown ethers [6,7] or any other ion-specific extractants [8]. However, with all their positive characteristics, most ionic liquids are expensive, therefore the necessity of their efficient usage appeals to a design of extraction systems that would be able to provide maximum extraction efficiency at minimum cost.…”

An Efficient Method for the One-pot, Four-component Benzaldehyde based Synthesis of 3-methyl-1,4-diphenyl-7,8-dihydro-1H-furo[3,4-e]pyrazolo[3,4-b]pyridin-5(4H)-ones Catalyzed by Alum in Environment-friendly Media

“…1) [21][22][23][24][25] . Because of these useful properties, ILs have been applied in several areas, including catalysis, electrochemistry, separation science for extraction of heavy metal ions, as solvents for green chemistry and materials for optoelectronic applications [26][27][28][29][30] .…”