Improvement of Gd(III) Solvent Extraction by 4-Benzoyl-3-methyl-1-phenyl-2-pyrazolin-5-one: Non-Aqueous Systems

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creativework.keywordschelating ligand, EPR, gadolinium ion, ionic liquids, non-aqueous solvent extraction, separation
creativework.publisherMDPIen
dc.contributor.authorAtanassova M.
dc.contributor.authorKukeva R.
dc.date.accessioned2024-07-10T14:27:06Z
dc.date.accessioned2024-07-10T14:50:41Z
dc.date.available2024-07-10T14:27:06Z
dc.date.available2024-07-10T14:50:41Z
dc.date.issued2023-05-01
dc.description.abstractThe study of the liquid–liquid extraction of gadolinium (Gd(III) ion) with a chelating compound, 4-benzoyl-3-methyl-1-phenyl-2-pyrazolin-5-one (HP), and the determination of the process parameters are presented by employing two ionic liquids, namely, ([C1Cnim+][Tf2N−], n = 4, 10) and CHCl3, as diluents. Compared to CHCl3, the ionic liquid offers increased distribution ratios in an aqueous medium. A step forward, enhanced solvent extraction, and improved separation upon the addition of ethylene glycol are demonstrated, i.e., a boost of two immiscible organic phases, compared to traditional aqueous solutions. However, this is noticeable when using CHCl3, but unfortunately not with ionic liquid combination, [C1C10im+][Tf2N−]. Several conclusions are given, highlighting the role of the ionic diluent in complexation processes and selectivity with an employment of the chelating agent HP for various metal s-, p-, d-, and f-cations, i.e., nearly 25 metals. A detailed evaluation of the selectivity between these metals was made when changing both the aqueous phase completely with ethylene glycol or partially with glycerol (1:1). Electron paramagnetic resonance (EPR) spectroscopy has been used to study the established chemical species in the obtained organic extracts, such as Gd3+, Fe3+, Cu2+, and Cr3+, with unpaired electrons.
dc.identifier.doi10.3390/separations10050286
dc.identifier.issn2297-8739
dc.identifier.scopusSCOPUS_ID:85160281403en
dc.identifier.urihttps://rlib.uctm.edu/handle/123456789/838
dc.language.isoen
dc.source.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85160281403&origin=inward
dc.titleImprovement of Gd(III) Solvent Extraction by 4-Benzoyl-3-methyl-1-phenyl-2-pyrazolin-5-one: Non-Aqueous Systems
dc.typeArticle
oaire.citation.issue5
oaire.citation.volume10
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