Synergistic and antagonistic effects during solvent extraction of Gd(III) ion in ionic liquids

Atanassova, Maria; Kukeva, Rositsa; Stoyanova, Radostina; Todorova, Nina; Kurteva, Vanya

doi:10.1016/j.molliq.2022.118818

Cited by 9 publications

(5 citation statements)

References 77 publications

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“…Among the lanthanoids, only Gd 3+ is extracted at ~3%, while the s-ion, Na + is about 24%. More than 50% extraction efficiency is observed as usual in similar studies for Fe 3+ , Cu 2+, and the heavy Bi 3+ [44,45], while less than 50% solvent extraction from water to chloroform medium could be seen for Al 3+ , Pb 2+, and Cr 3+ .…”

Section: Solvent Extraction and Selectivity Across The Periodic Table...supporting

confidence: 77%

“…Nevertheless, as a whole, based on our previous investigations and other research studies, while the selectivity decreases, the lanthanoid solvent extraction increases in the following order: β-diketone < 4-acylpyrazolone < 4-acyl-3-phenyl-5-isoxazolone. Another appropriate way to evaluate the solvent extraction power of the chelating ligands is to compare the corresponding values of pH 50 [44]. Evidently, the values of pH 50 for the liquid-liquid extraction of 4f-elements obtained when the chelating compound is the typical β-diketone, thenoyltrifluoroacetone (HTTA) are more than one pH unit larger compared to when 4-acylpyrazolone is in use, as well as approximately three pH units larger compared with 4-benzoyl-3-phenyl-5-isoxazolone reagents (see Figure S1).…”

Section: Solvent Extraction and Selectivity Across The Periodic Table...mentioning

confidence: 99%

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

Atanassova

Kukeva

2023

Separations

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The 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.

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Section: Solvent Extraction and Selectivity Across The Periodic Table...supporting

confidence: 77%

Section: Solvent Extraction and Selectivity Across The Periodic Table...mentioning

confidence: 99%

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

Atanassova

Kukeva

2023

Separations

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“…However, ionic liquids can be synergistic additives rather than bulk diluents for separation of f -elements. ,− We hypothesize that the combination of N,O-donor extractants with a hydrophobic anion NTf 2 – (bis[(trifluoromethyl) sulfonyl]imide) , should improve the extraction parameters of the system for the separation of An(III) and Ln(III). , …”

Section: Introductionmentioning

confidence: 99%

Ionic Liquid as a N,O-Donor Ligand-Based Extraction System Modifier: Establishing the Mechanism of Am(III)-Selectivity Increasing

Gerasimov,

Pozdeev,

Evsiunina

et al. 2024

Inorg. Chem.

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In this work, we studied the extraction systems for the separation f-elements based on the tetradentate N,O-donor ligand di(N-ethyl-4-ethylanilide) 2,2′-dipyridyl-6,6′-dicarboxylic acid (L). The organic phase of these systems was perspective fluorine-containing organic solvents−metanitrobenzotrifluoride (F-3), ionic liquid C 4 mimNTf 2 (IL), and their mixture. The increase of Am(III) selectivity in the presence of Ln(III) in cases of the diluent mixture was shown. The mechanism of the f-element complexation leading to the improved properties of the extraction systems was studied by UV−visible, Raman-spectroscopy, XRDstudy, and density functional theory calculations.

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“…[3] Solvent extraction with organic compounds (extractants) is the most promising method for the recovery of metals from industrial waste compared to other methods due to high productivity, economic feasibility, high speed, and simple process design. [4][5][6][7][8][9][10][11][12][13][14][15] Organophosphorus extractants are becoming increasingly important in hydrometallurgical processes [16] due to their high selectivity, good solubility of both extractants and their metal complexes in nonpolar solvents, high degree of stripping, chemical stability, acid resistance, and low cost. However, a significant disadvantage of liquid organophosphorus extractants is their high toxicity.…”

Section: Introductionmentioning

confidence: 99%

Investigations into the Extraction of Copper (II) using Methyl Isobutyl ketone solvent

2023

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This work concerns the study of the extraction of copper (II) in the perchlorate medium by Bis-2-ethylhexyl phosphoric acid (D2EHPA) in methyl isobutyl ketone (MIBK) at 25 °C at different ionic strength (1, 1/6, 1/10 mol kg À 1 ). The stoichiometry of the reaction of extracted complexations was determined by the slope method. The organometallic complexes extracted in the organic phase are of the type CuL 2 in methyl isobutyl ketone has unit ionic strength. The organometallic complexes extracted in the organic phase are of the type CuL 2 ClO 4 (H 2 O) or CuL 2 ClO 4 (MIBK)x in methyl isobutyl ketone has different ionic strength Efficiency of the extraction of copper (II) depends on the ionic strength of the aqueous medium. Hence when the ionic strength of the aqueous perchlorate medium increases the extraction of copper (II) increases.

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Synergistic and antagonistic effects during solvent extraction of Gd(III) ion in ionic liquids

Cited by 9 publications

References 77 publications

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

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

Ionic Liquid as a N,O-Donor Ligand-Based Extraction System Modifier: Establishing the Mechanism of Am(III)-Selectivity Increasing

Investigations into the Extraction of Copper (II) using Methyl Isobutyl ketone solvent

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