Solvent extraction-separation of La(III), Eu(III) and Er(III) ions from aqueous chloride medium using carbamoyl-carboxylic acid extractants

Safarbali, Reyhaneh; Yaftian, Mohammad Reza; Zamani, Abbasali

doi:10.1016/s1002-0721(14)60583-4

Cited by 34 publications

(19 citation statements)

References 38 publications

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“…The synthesis and characterization of N,N-dioctyldiglycolamic acid (HL) were performed based on the previously reported procedure [28]. The stock solutions of La(III), Eu(III) and Er(III) ions were prepared by dissolving an appropriate amount of their oxides (Fluka) in concentrated nitric acid (Merck).…”

Section: Methodsmentioning

confidence: 99%

“…The equation describing the extraction equilibrium of La(III) and Eu(III) ions from chloride medium into carbon tetrachloride solution of HL has been demonstrated as [28]:…”

Section: Quantification Of La(iii)/18c6 and Eu(iii)/18c6 Interactionsmentioning

confidence: 99%

“…The logK ex values have been evaluated by analyzing the extraction experiments data of these ions and have been reported as −1.30 and −0.30 [28]. As the metal organic concentrations are much lower than that of the initial ligand concentration, and by considering the distribution of the ligand between aqueous and organic phases is negligible, the equilibrium ligand concentration can be considered equal to its initial concentration:…”

Section: Quantification Of La(iii)/18c6 and Eu(iii)/18c6 Interactionsmentioning

confidence: 99%

“…Our recent investigation on the extractive properties of N,N-dioctyldiglycolamic acid (HL) toward La(III), Eu(III) and Er(III) ions, from chloride aqueous solutions, confirmed its potential toward these ions [28]. Lanthanum, europium and erbium ions have been selected as representative ions for light, middle and heavy rare earths.…”

Section: Introductionmentioning

confidence: 96%

“…These deficiencies conduct the interests toward development and application of different types of extractants [22][23][24][25][26][27][28]. The organic extractants composed of only C, H, O and N atoms (the CHON-principle) have attracted much attention as green extractants to establish a new residual waste-free extraction process based on their complete combustibility.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Combination of size selective binding ability of 18-crown-6 dissolved in aqueous phase and extractive properties of an amic acid; toward enhancement of rare earths separation

et al. 2016

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Section: Methodsmentioning

confidence: 99%

“…The equation describing the extraction equilibrium of La(III) and Eu(III) ions from chloride medium into carbon tetrachloride solution of HL has been demonstrated as [28]:…”

Section: Quantification Of La(iii)/18c6 and Eu(iii)/18c6 Interactionsmentioning

confidence: 99%

Section: Quantification Of La(iii)/18c6 and Eu(iii)/18c6 Interactionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Combination of size selective binding ability of 18-crown-6 dissolved in aqueous phase and extractive properties of an amic acid; toward enhancement of rare earths separation

et al. 2016

Self Cite

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Construction of three types of lanthanide complexes based on 3,4‐dimethylbenzoic acid and 5,5′‐dimethyl‐2,2′‐bipyridine: Syntheses, Structures, Thermodynamic properties, Luminescence, and Bacteriostatic activities

Zhu

Ren

Zhang

et al. 2018

Applied Organom Chemis

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Three novel lanthanide complexes [Er (3,4‐DMBA)3(5,5′‐DM‐2,2′‐bipy)(H2O)] (1); [Tb2 (3,4‐DMBA)6(5,5′‐DM‐2,2′‐bipy)2(H2O)] (2); [Eu (3,4‐DMBA)3(3,4‐DMHBA)(5,5′‐DM‐2,2′‐bipy)]2 (3) (3,4‐DMHBA = 3,4‐dimethylbenzoic acid, 5,5′‐DM‐2,2′‐bipy =5,5′‐dimethyl‐2,2′‐bipyridine) were successfully synthesized via conventional solution method at room temperature and structurally characterized by single crystal diffraction. The structures of the complexes 1–3 were confirmed on the basis of elemental analysis, coordination titration analysis, IR and XRD. The molecular structures of complexes 2 and 3 are very particular: complex 2 has two same central metal ions but each metal ion has different coordination environment; in structure of the complex 3, there are eight carboxylic acid ligands coordinated to the central metal ions, which have rarely been reported previously. The thermal decomposition mechanism of complexes 1–3 were investigated by the technology of simultaneous TG/DSC‐FTIR. The heat capacities of the complexes were recorded by means of DSC over the range of from 253.15 K to 345.15 K. The thermodynamic parameters, the smoothed values of heat capacities, enthalpy (HT‐H298.15K) and entropy (ST‐S298.15K) were also calculated. The bacteriostatic activities of the complexes were evaluated against Staphylococcus aureus, Escherichia coli and Candida albicans. What's more, the luminescence properties of complexes 2 and 3 were discussed, and their fluorescence lifetimes as well as the quantum yield of the Eu (III) were measured. To elucidate the energy transfer process of complexes 2 and 3, the energy levels of the relevant electronic states have been estimated.

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Improved Extraction of Rare Earths of La, Ce, Pr, and Nd by Optimizing the Structure of Phenoxyacetic Acid

Zhang

Guo

et al. 2021

ChemistrySelect

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A novel extractant, 2‐(2‐heptanoylphenoxy)acetic acid (HA), was synthesized and applied to extract La, Ce, Pr, and Nd from the hydrochloric acid solution. The extraction parameters including pH, temperature, concentrations of HA and chloride ion were investigated and discussed in detail. The extraction mechanism was studied with Fourier‐transform infrared (FT‐IR) spectroscopy. Compared with the extractant of sec‐octylphenoxy acetic acid (CA12), HA showed excellent performance and different extraction order in extracting La, Ce, Pr, and Nd. All the rare‐earth metals (REs) were extracted by the cation exchange mechanism and loaded as REs(A)3. The stripping test showed that the loaded REs in the organic phase can be effectively stripped with sulfuric acid at medium acidity. This work revealed that HA is an effective extractant for REs.

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Solvent extraction-separation of La(III), Eu(III) and Er(III) ions from aqueous chloride medium using carbamoyl-carboxylic acid extractants

Cited by 34 publications

References 38 publications

Combination of size selective binding ability of 18-crown-6 dissolved in aqueous phase and extractive properties of an amic acid; toward enhancement of rare earths separation

Combination of size selective binding ability of 18-crown-6 dissolved in aqueous phase and extractive properties of an amic acid; toward enhancement of rare earths separation

Construction of three types of lanthanide complexes based on 3,4‐dimethylbenzoic acid and 5,5′‐dimethyl‐2,2′‐bipyridine: Syntheses, Structures, Thermodynamic properties, Luminescence, and Bacteriostatic activities

Improved Extraction of Rare Earths of La, Ce, Pr, and Nd by Optimizing the Structure of Phenoxyacetic Acid

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