Abstract
Imidazolium ionic liquids containing acetylacetone, thenoyltrifluoroacetone, or 8-hydroxyquinoline, respectively, were used as the extracting agents for the separation of traces of iron (III) from its aqueous solutions with or without citric and oxalic acids. The results show that 8-hydroxyquinoline in imidazolium ionic liquids extract iron quantitatively from all the tested solutions including complexing ones, regardless of indications of unexpected iron behavior/speciation.
Highlights
At present days, ionic liquids become increasingly interesting for researchers in a wide range of fields
The possibility of tuning the properties of ionic liquids can lead to their specific use, ionic liquids can be used as a substitute for conventional organic solvents, when they may be used in nearly any area where the conventional molecular solvents are traditionally employed
Pre-experimental screening confirmed the presumption of negligible iron (III) extraction into pure imidazolium ionic liquid
Summary
Ionic liquids become increasingly interesting for researchers in a wide range of fields They play an important role in many current technologies from hydrometallurgy to food processing [1]. These substances gained the attention of scientists due to their unique and tunable properties depending on the exact structure of the anion and cation [2]. The possibility of tuning the properties of ionic liquids can lead to their specific use, ionic liquids can be used as a substitute for conventional organic solvents, when they may be used in nearly any area where the conventional molecular solvents are traditionally employed. Liquid-liquid extraction is shown to be one of the most evident applications to purify or concentrate the substances [1] and it seems to be a very promising way for the separation of metals and radionuclides in the treatment of industrial waste
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