Solvent extraction of americium(III) and europium(III) with 2,6-bis(5,6-diethyl-1,2,4-triazin-3-yl) pyridine in ionic liquids: Experimental study and molecular dynamics simulation

Tan, Cunmin; Zhang, Xin; Cao, Shiwei; Li, Sa; Guo, Hangxu; Tian, Yuan; Chen, Desheng; Tian, Wei; Wang, Lei; Qin, Zhi

doi:10.1016/j.seppur.2017.09.033

Cited by 27 publications

(10 citation statements)

References 31 publications

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“…The equilibrium time is one of the most important parameters of the extraction process, especially for the extraction system containing IL. Because most of ILs belonged to the liquid solvent with high viscosity, the mass transfer would be slower than that of the traditional extractants, [ 38 ] such as sulfonated kerosene and N , N ‐bis(1‐methylheptyl)acetamide (N503). In order to obtain the equilibrium time of the extraction and separation of Li + from the brine by the IL + TBP + DCE system, experiments were conducted in the range of 0.5—30 min at 298.15 K and 278.15 K, respectively.…”

Section: Resultsmentioning

confidence: 99%

Efficient Extraction of Lithium Ions from High Mg/Li Ratio Brine through the Synergy of TBP and Hydroxyl Functional Ionic Liquids

et al. 2020

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of main observation and conclusion The extraction of Li + from the high Mg/Li ratio brine was performed using hydroxyl functional ionic liquids (ILs) as the coextractant and tributyl phosphate (TBP) as the extractant. Firstly, the extractive system, 1-(2-hydroxyethyl)-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([HOEmim][NTf2]) + TBP was proved to exhibit the highest extraction efficiency of Li + (88.15%) from LiCl aqueous solutions among the extractants composed of different ILs, TBP, and ILs + TBP. Effects of various extraction parameters on the extraction efficiencies of Li + and Mg 2+ were then investigated. 95.01% of Li + was extracted and the Li/Mg separation factor reached 405.76 in a single-stage at 278.15 K and O/A of 2 : 1. The extraction complexes were determined by the slope analysis method and ESI-MS analysis, and the metal complexes in the organic phase were indicated to be mainly [Li•2 TBP][NTf2]. The striping study showed that 92.86% of Li + was stripped with 1.0 mol•L-1 HCl. 98% extraction capacity of the synergy extractants was remained after 5 regeneration cycles. The thermodynamic parameters (ΔG°, ΔH°, and ΔS°), together with the mechanism of the Li + extraction were further demonstrated finally. According to the results, [HOEmim][NTf2] + TBP extraction system showed promising performance in extracting lithium from salt lake brine with high Mg/Li ratio.

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Section: Resultsmentioning

confidence: 99%

Efficient Extraction of Lithium Ions from High Mg/Li Ratio Brine through the Synergy of TBP and Hydroxyl Functional Ionic Liquids

et al. 2020

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“…The application of ionic liquids as diluents in the extraction of europium showed that the transport mechanism in the combination of ionic liquids and the reactive agents is different from conventional systems diluted with a molecular solvent. 19 The homogeneous process of combining ionic liquids in europium extraction showed that an unlimited contact surface between the two phases could be obtained for extraction. This work is associated with high extraction rates and helps as an alternative system in recovering rare-earth elements.…”

Section: Introductionmentioning

confidence: 99%

Continuous Extraction of Europium(III) by Ionic Liquid in the Rotating Disk Column with an Asymmetrical Structure Aimed at the Evaluation of Reactive Mass Transfer

2020

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In this study, the features of the solvent extraction technique were investigated to explore the potential of ionic liquid for extracting Eu(III) from aqueous solution. The transport process between the aqueous and organic phase was carried out in the rotating disk column with an asymmetrical structure and a continuous mode of operation. The utilization of Cyphos IL 104 as an ionic liquid in comparison with Cyanex272 extractant was evaluated for the extraction abilities in the recovering of Eu(III) under different conditions, including agitation speed, inlet aqueous, and solvent phase velocities. The degree of extraction and the mass-transfer rate were best when the agitation speed and the superficial velocities of aqueous and solvent phases were adjusted to 690 rpm, 0.831 mm/s, and 1.385 mm/s, respectively. The better efficiency was achieved using the ionic liquid with 0.02 mol/L concentration, 96.52% Eu(III) extraction in comparison to the same condition without the presence of ionic liquids with Cyanex272 (0.5 mol/L, 99.66%). With the analysis of the data, it was noted that the increase in the operating parameters has a positive influence on the holdup, degree of extraction, and mass-transfer rates. The percentage increase equal to 33.57% for overall mass-transfer coefficients was obtained with the increment of mixing in the column. The results showed that the mass transfer is associated with reactive resistance. The previous correlation did not explain the behavior of the system correctly in the reactive mode. Finally, the empirical models using the Sherwood number were developed to correlate the mass-transfer coefficient.

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“…Although the removal of europium from different mixtures is usually carried out by solvent extraction [15][16][17][18][19] or ion exchange [20][21][22][23][24][25], both methodologies make use of large amounts of harmful chemical substances. Therefore, the use of adsorption processes in the recovery of Eu(III) from wastewater is considered to be advantageous and it has been explored by various research groups as an alternative towards this purpose [26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

β-ketoester-functionalized magnetoactive electrospun polymer fibers as Eu(III) adsorbents

et al. 2018

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Blended polymer fibers based on a hydrophobic random copolymer having β-ketoester metal ion binding functionalities namely poly(methyl methacrylate)-random-poly(2-(acetoacetoxy) ethyl methacrylate) (PMMA-co-PAEMA) and the hydrophilic polyethylene oxide (PEO) were fabricated by electrospinning and further evaluated for the first time as adsorbents for the removal of Eu(III) from aqueous media. Moreover, magnetoactive fibrous analogues were prepared by incorporating preformed, oleic-acid coated Fe 3 O 4 NPs within the polymer fibers during electrospinning. The Eu(III) adsorption was investigated as a function of pH and initial metal ion concentration whereas the effect of the Fe 3 O 4 NPs and of the β-ketoester groups on the membrane adsorption efficacy was also investigated. The experimental data, which were well fitted by the Langmuir isotherm model, indicated increased affinity with increasing pH and reached maximum values (~ 95%) at pH 6.5. The presence of the β-ketoester functionalities as well as the incorporation of the Fe 3 O 4 nanoparticles within the fibrous adsorbents affect positively the adsorption process and indicate the significance of chemical modification with respect to water purification and precious metal recovery using adsorbent-based technologies.

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Solvent extraction of americium(III) and europium(III) with 2,6-bis(5,6-diethyl-1,2,4-triazin-3-yl) pyridine in ionic liquids: Experimental study and molecular dynamics simulation

Cited by 27 publications

References 31 publications

Efficient Extraction of Lithium Ions from High Mg/Li Ratio Brine through the Synergy of TBP and Hydroxyl Functional Ionic Liquids

Efficient Extraction of Lithium Ions from High Mg/Li Ratio Brine through the Synergy of TBP and Hydroxyl Functional Ionic Liquids

Continuous Extraction of Europium(III) by Ionic Liquid in the Rotating Disk Column with an Asymmetrical Structure Aimed at the Evaluation of Reactive Mass Transfer

β-ketoester-functionalized magnetoactive electrospun polymer fibers as Eu(III) adsorbents

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