Extraction of americium and europium with functionalized calixarenes from alkaline solutions

Смірнов, І. В.; Stepanova, E. S.; Drapailo, A. B.; Kаlchеnkо, Vitaly I.

doi:10.1134/s1066362216010070

Cited by 15 publications

(11 citation statements)

References 13 publications

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“…It is acknowledged that solvent extraction is a significant part of the process . Due to the importance of solvent extraction in separating europium and its similar ions, numerous studies in the literature have been conducted to investigate the effect of different solvents on the removal of this element. − Studies by Tunsu and co-workers showed that the separation of yttrium and europium ions could be provided by Cyanex572. The increase in temperature has adverse effects on the separation process, and the high hydrochloric acid concentration (>3 mol/L) is required for the stripping and recovery of these 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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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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“…Another consideration is the ability to form soluble complexes under the prevailing alkaline conditions. In the literature, various ligand derivatives, such as alkyl(aminomethyl) phenols, [5] calix [4]arenes, [6][7] thiacalix, [8] and alkylpyrocathecols, [9][10] have been applied for the extraction of f-elements from high pH, with alkylpyrocathecols showing Am[III] extraction as high as 97% from 6 M NaOH. Several sulfonamide-based ligands have been synthesized by our group aiming at f-element extraction from alkaline solutions, and have yielded promising results for Sm(III) extraction, which was used as a surrogate for Am(III).…”

Section: Introductionmentioning

confidence: 99%

SULFONAMIDE LIGAND FRAMEWORKS FOR Sm(III) EXTRACTION FROM ALKALINE HIGH-LEVEL WASTE

Zhang¹,

Adedoyin²,

Bertoli³

et al. 2020

RAD Conference Proceedings

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As part of our efforts to develop efficient extractants for highly alkaline high-level waste at the Savannah River Site, extraction studies of Sm(III) by three types of sulfonamide ligands have been carried out. Aqueous phases of various alkalinity (pH 10 -14) were used, while dichloromethane was the organic phase. Analysis of the aqueous phases by the Arsenazo-III UV-Vis spectrophotometric method was carried out following stripping of the organic phases with 0.1 M HNO3. The results indicate that all three types of sulfonamides exhibit strong Sm(III) extraction and recovery at pH range of 10-11.5 in the presence of an organic base (triethylamine). A UV-Vis titration study of disulfonamide (DSA-7) with Sm(III) is indicative of 1:1 M/L complexation in solution in accordance with our previously published work with analogous disulfonamides.

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“…The isotope 90 Sr is among the most dangerous radionuclides, as it can accumulate in bone tissue on a par with calcium and lead to radiation damage of surrounding tissues. Therefore, an important goal is to develop an effective method for the extraction of strontium from high-level waste.…”

mentioning

confidence: 99%

“…This method can be used for the extraction of the long-lived radioactive strontium isotope 90 Sr from high-level waste, as well as for the separation of parent 90 Sr and its daughter isotope 90 Y (used in radiation therapy). However, the authors of [80] did not present distribution ratios or separation factor which are the key characteristics of extraction processes.…”

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confidence: 99%

Chelating Extractants for Metals

Yudaev

Chistyakov

2022

Metals

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In the present review, works on the classes of chelating extractants for metals, compounds with several amide and carboxyl groups, azomethines, oximes, macrocyclic compounds (crown ethers and calixarenes), phenanthroline derivatives, and others are systematized. This review focuses on the efficiency and selectivity of the extractants in the recovery of metals from industrial wastewater, soil, spent raw materials, and the separation of metal mixtures. As a result of this study, it was found that over the past seven years, the largest number of works has been devoted to the extraction of heavy metals with amino acids (16 articles), azomethines and oximes (12 articles), lanthanids with amide compounds (15 articles), lanthanides and actinides with phenanthroline derivatives (7 articles), and noble metals with calixarenes (4 articles). Analysis of the literature showed that amino acids are especially effective for extracting heavy metals from the soil; thiodiglycolamides and aminocalixarenes for extracting noble metals from industrial waste; amide compounds, azomethines, oximes, and phenanthroline derivatives for extracting actinides; amide compounds for extracting lanthanides; crown ethers for extracting radioactive strontium, rhenium and technetium. The most studied parameters of extraction processes in the reviewed articles were the distribution ratios and separation factors. Based on the reviewed articles, it follows that chelate polydentate compounds are more efficient compounds for the extraction of metals from secondary resources compared to monodentate compounds.

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Extraction of americium and europium with functionalized calixarenes from alkaline solutions

Cited by 15 publications

References 13 publications

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

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

SULFONAMIDE LIGAND FRAMEWORKS FOR Sm(III) EXTRACTION FROM ALKALINE HIGH-LEVEL WASTE

Chelating Extractants for Metals

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