1
|
Hall GB, Campbell EL, Bessen NP, Graham TR, Cho H, RisenHuber M, Heller FD, Lumetta GJ. Extraction of Nitric Acid and Uranium with DEHiBA under High Loading Conditions. Inorg Chem 2023; 62:6711-6721. [PMID: 37058585 DOI: 10.1021/acs.inorgchem.3c00288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Abstract
The mechanism by which high concentrations (1.5 M in n-dodecane) of N,N-di-2-ethylhexyl-isobutyramide (DEHiBA) extracts HNO3 and UO2(NO3)2 is under examination. Most prior studies have examined the extractant and the mechanism at a concentration of 1.0 M in n-dodecane; however, under the higher loading conditions that can be achieved by a higher concentration of extractant, this mechanism could change. Increased extraction of both nitric acid and uranium is observed with an increased concentration of DEHiBA. The mechanisms are examined by thermodynamic modeling of distribution ratios, 15N nuclear magnetic resonance (NMR) spectroscopy, and Fourier transform infrared (FTIR) spectroscopy coupled with principal component analysis (PCA). Speciation diagrams produced through thermodynamic modeling have been qualitatively reproduced through PCA of the FTIR spectra. The predominant extracted species of HNO3(DEHiBA), HNO3(DEHiBA)2, and UO2(NO3)2(DEHiBA)2 are in good agreement with prior literature reports for 1.0 M DEHiBA systems. Evidence for an additional species of either UO2(NO3)2(DEHiBA) or UO2(NO3)2(DEHiBA)2(HNO3) also contributing to the extraction of uranium species is given.
Collapse
Affiliation(s)
- Gabriel B Hall
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Emily L Campbell
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Nathan P Bessen
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Trent R Graham
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Herman Cho
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Matthew RisenHuber
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Forrest D Heller
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Gregg J Lumetta
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| |
Collapse
|
2
|
Chen Q, Li B, Wang J, Zhu H, Chen X, Hu Y, Zhou J, Wang W, Zheng W, Yan T. Selective coordination behaviors of Uranium(VI) with novel asymmetrical tetra-alkylcarbamides. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
|
3
|
Makombe E, Bourgeois D, Berthon L, Meyer D. Uranium(VI) and thorium(IV) extraction by malonamides: Impact of ligand molecular topology on selectivity. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
4
|
Extraction of Uranium in Nitric Media with Novel Asymmetric Tetra-Alkylcarbamide. Molecules 2022; 27:molecules27175527. [PMID: 36080293 PMCID: PMC9457804 DOI: 10.3390/molecules27175527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 08/21/2022] [Accepted: 08/25/2022] [Indexed: 11/17/2022] Open
Abstract
The use of tetra-alkylcarbamides as novel ligands: N,N-butyl-N’,N’-hexylurea (L1: ABHU), and N,N-butyl-N’,N’-pentylurea (L2: ABPU), for the solvent extraction and complexation behaviors of uranium(VI) was synthesized and investigated in this study. The effects of HNO3 and NO3− concentrations in the aqueous phase on the distribution ratio of U(VI) were examined. Under 5 mol/L HNO3 concentration, DU reached 5.02 and 4.94 respectively without third-phase formation. During the extraction, slope measurements and IR spectral analysis revealed that the U(VI) complexes are a form of UO2(NO3)2·2L for both ligands. In addition, thermodynamic studies showed that the uranium extraction reaction was a spontaneous exothermic reaction. The deep structural analysis of the complexes was realized with DFT calculation. The bond length, bond properties, and topology of the complexes were discussed in detail to analyze the extraction behavior. This study enriches the coordination chemistry of U(VI) by tetra-alkylcarbamides, which may offer new clues for the design and synthesis of novel ligands for the separation, enrichment, and recovery of uranium in the nuclear fuel cycle.
Collapse
|
5
|
Coquil M, Boubals N, Duvail M, Charbonnel MC, Dufrêche JF. On interactions in binary mixtures used in solvent extraction: Insights from combined Isothermal Titration Calorimetry experiments and Molecular Dynamics simulations. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.116985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
6
|
Kimberlin A, Saint-Louis G, Guillaumont D, Camès B, Guilbaud P, Berthon L. Effect of Metal Complexation on Diglycolamides Radiolysis: A Comparison between Ex-Situ Gamma and In-Situ Alpha Irradiation. Phys Chem Chem Phys 2022; 24:9213-9228. [DOI: 10.1039/d1cp05731f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Radiolytic degradation is an important aspect to consider when developping a ligand or a complexant for radionucleides. Diglycolamide extractants (DGAs) have been playing an important role in many partition processes...
Collapse
|
7
|
Oher H, Ferru G, Couston L, Berthon L, Guillaumont D, Réal F, Vercouter T, Vallet V. Influence of the First Coordination of Uranyl on Its Luminescence Properties: A Study of Uranyl Binitrate with N, N-Dialkyl Amide DEHiBA and Water. Inorg Chem 2021; 61:890-901. [PMID: 34881886 DOI: 10.1021/acs.inorgchem.1c02618] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Uranyl binitrate complexes have a particular interest in the nuclear industry, especially in the reprocessing of spent nuclear fuel. The modified PUREX extraction process is designed to extract U(VI) in the form of UO2(NO3)2(L)2 as has been confirmed by extended X-ray absorption fine structure (EXAFS), X-ray diffraction (XRD), and time-resolved laser-induced fluorescence spectroscopy (TRLFS) measurements. In this study, the L ligands are two molecules of N,N-di-(ethyl-2-hexyl)isobutyramide (DEHiBA) monoamide used to bind uranyl in its first coordination sphere. DEHiBA ligands can coordinate uranyl in either trans- or cis-position with respect to the nitrate ligands, and these two conformers may coexist in solution. To use luminescence spectroscopy as a speciation technique, it is important to determine whether or not these conformers can be discriminated by their spectroscopic properties. To answer this question, the spectra of trans- and cis-UO2(NO3)2(DEiBA)2 conformers were modeled with ab initio methods and compared to the experimental time-resolved luminescence spectra on UO2(NO3)2(DEHiBA)2 systems. Moreover, the hydrated uranyl binitrate UO2(NO3)2(H2O)2 complexes in the same trans and cis configurations were modeled to quantify the impact of organic DEHiBA on the luminescence properties.
Collapse
Affiliation(s)
- Hanna Oher
- Université Paris-Saclay, CEA, Service dÉtudes Analytiques et de Réactivité des Surfaces (SEARS), F-91191 Gif-sur-Yvette Cedex, France.,Université de Lille, CNRS, UMR 8523─PhLAM─Physique des Lasers Atomes et Molécules, F-59000 Lille, France
| | - Geoffroy Ferru
- CEA, DES, ISEC, DMRC, Université de Montpellier, Marcoule, F-30207 Bagnols-sur-Ceze, France
| | - Laurent Couston
- CEA, DES, ISEC, DMRC, Université de Montpellier, Marcoule, F-30207 Bagnols-sur-Ceze, France
| | - Laurence Berthon
- CEA, DES, ISEC, DMRC, Université de Montpellier, Marcoule, F-30207 Bagnols-sur-Ceze, France
| | - Dominique Guillaumont
- CEA, DES, ISEC, DMRC, Université de Montpellier, Marcoule, F-30207 Bagnols-sur-Ceze, France
| | - Florent Réal
- Université de Lille, CNRS, UMR 8523─PhLAM─Physique des Lasers Atomes et Molécules, F-59000 Lille, France
| | - Thomas Vercouter
- Université Paris-Saclay, CEA, Service dÉtudes Analytiques et de Réactivité des Surfaces (SEARS), F-91191 Gif-sur-Yvette Cedex, France
| | - Valérie Vallet
- Université de Lille, CNRS, UMR 8523─PhLAM─Physique des Lasers Atomes et Molécules, F-59000 Lille, France
| |
Collapse
|
8
|
Selective separation between UO22+ and Pu4+ by novel tetradentate chelate phenanthroline diamide ligand in 1-octanol. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119521] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
9
|
Celis Barros C, Pilgrim CD, Cook AR, Mezyk SP, Grimes TS, Horne GP. Influence of uranyl complexation on the reaction kinetics of the dodecane radical cation with used nuclear fuel extraction ligands (TBP, DEHBA, and DEHiBA). Phys Chem Chem Phys 2021; 23:24589-24597. [PMID: 34710211 DOI: 10.1039/d1cp03797h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Specialized extractant ligands - such as tri-butyl phosphate (TBP), N,N-di-(2-ethylhexyl)butyramide (DEHBA), and N,N-di-2-ethylhexylisobutryamide (DEHiBA) - have been developed for the recovery of uranium from used nuclear fuel by reprocessing solvent extraction technologies. These ligands must function in the presence of an intense multi-component radiation field, and thus it is critical that their radiolytic behaviour be thoroughly evaluated. This is especially true for their metal complexes, where there is negligible information on the influence of complexation on radiolytic reactivity, despite the prevalence of metal complexes in used nuclear fuel reprocessing solvent systems. Here we present a kinetic investigation into the effect of uranyl (UO22+) complexation on the reaction kinetics of the dodecane radical cation (RH˙+) with TBP, DEHBA, and DEHiBA. Complexation had negligible effect on the reaction of RH˙+ with TBP, for which a second-order rate coefficient (k) of (1.3 ± 0.1) × 1010 M-1 s-1 was measured. For DEHBA and DEHiBA, UO22+ complexation afforded an increase in their respective rate coefficients: k(RH˙+ + [UO2(NO3)2(DEHBA)2]) = (2.5 ± 0.1) × 1010 M-1 s-1 and k(RH˙+ + [UO2(NO3)2(DEHiBA)2]) = (1.6 ± 0.1) × 1010 M-1 s-1. This enhancement with complexation is indicative of an alternative RH˙+ reaction pathway, which is more readily accessible for [UO2(NO3)2(DEHBA)2] as it exhibited a much larger kinetic enhancement than [UO2(NO3)2(DEHiBA)2], 2.6× vs. 1.4×, respectively. Complementary quantum mechanical calculations suggests that the difference in reaction kinetic enhancement between TBP and DEHBA/DEHiBA is attributed to a combination of reaction pathway (electron/hole transfer vs. proton transfer) energetics and electron density distribution, wherein attendant nitrate counter anions effectively 'shield' TBP from RH˙+ electron transfer processes.
Collapse
Affiliation(s)
- Cristian Celis Barros
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306, USA.
| | - Corey D Pilgrim
- Center for Radiation Chemistry Research, Idaho National Laboratory, P.O. Box 1625, Idaho Falls, ID, 83415, USA.
| | - Andrew R Cook
- Department of Chemistry, Brookhaven National Laboratory, Upton, New York, 11973, USA
| | - Stephen P Mezyk
- Department of Chemistry and Biochemistry, California State University Long Beach, 1250 Bellflower Boulevard, Long Beach, California, 90840-9507, USA
| | - Travis S Grimes
- Center for Radiation Chemistry Research, Idaho National Laboratory, P.O. Box 1625, Idaho Falls, ID, 83415, USA.
| | - Gregory P Horne
- Center for Radiation Chemistry Research, Idaho National Laboratory, P.O. Box 1625, Idaho Falls, ID, 83415, USA.
| |
Collapse
|
10
|
Artese A, Dourdain S, Boubals N, Dumas T, Solari PL, Menut D, Berthon L, Guilbaud P, Pellet-Rostaing S. Evidence of Supramolecular Origin of Selectivity in Solvent Extraction of Bifunctional Amidophosphonate Extractants with Different Configurations. SOLVENT EXTRACTION AND ION EXCHANGE 2021. [DOI: 10.1080/07366299.2021.1961433] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Alexandre Artese
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Marcoule, France
- CEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, France
| | | | | | - Thomas Dumas
- CEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, France
| | | | - Denis Menut
- Synchrotron SOLEIL, MARS Beamline, Gif Sur Yvette, France
| | | | | | | |
Collapse
|
11
|
Gourdin-Bertin S, Dufrêche JF, Duvail M, Zemb T. Microemulsion as Model to Predict Free Energy of Transfer of Electrolyte in Solvent Extraction. SOLVENT EXTRACTION AND ION EXCHANGE 2021. [DOI: 10.1080/07366299.2021.1953259] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | | | - Magali Duvail
- ICSM, CEA, Univ Montpellier, CNRS, ENSCM, Marcoule, France
| | - Thomas Zemb
- ICSM, CEA, Univ Montpellier, CNRS, ENSCM, Marcoule, France
| |
Collapse
|
12
|
Electrochemical Behavior of Ce(IV)/Ce(III) Couple in N,N‐Di(2‐ethylhexyl)‐n‐butanamide (DEHBA), N,N‐Di(2‐ethylhexyl)‐iso‐butanamide (DEHiBA), and N,N‐Di(2‐ethylhexyl)‐3,3‐dimethyl Butanamide (DEHDMBA). ELECTROANAL 2021. [DOI: 10.1002/elan.202100157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
13
|
Berger C, Moreau E, Marie C, Guillaumont D, Beillard A, Berthon L. Extraction of Uranium(VI) and Plutonium(IV) by New Tri Alkylcarbamides. SOLVENT EXTRACTION AND ION EXCHANGE 2021. [DOI: 10.1080/07366299.2021.1920167] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Clémence Berger
- CEA, DES, ISEC, DMRC, University of Montpellier, Marcoule, France
| | - Ella Moreau
- CEA, DES, ISEC, DMRC, University of Montpellier, Marcoule, France
| | - Cécile Marie
- CEA, DES, ISEC, DMRC, University of Montpellier, Marcoule, France
| | | | - Audrey Beillard
- CEA, DES, ISEC, DMRC, University of Montpellier, Marcoule, France
| | - Laurence Berthon
- CEA, DES, ISEC, DMRC, University of Montpellier, Marcoule, France
| |
Collapse
|
14
|
Špadina M, Dourdain S, Rey J, Bohinc K, Pellet-Rostaing S, Dufrêche JF, Zemb T. How acidity rules synergism and antagonism in liquid–liquid extraction by lipophilic extractants—Part II: application of the ienaic modelling. SOLVENT EXTRACTION AND ION EXCHANGE 2021. [DOI: 10.1080/07366299.2021.1899614] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- M. Špadina
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Marcoule, France
- Faculty of Health Sciences, University of Ljubljana, Ljubljana, Slovenia
| | - S. Dourdain
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Marcoule, France
| | - J. Rey
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Marcoule, France
| | - K. Bohinc
- Faculty of Health Sciences, University of Ljubljana, Ljubljana, Slovenia
| | | | | | - T. Zemb
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Marcoule, France
| |
Collapse
|
15
|
Berthon L, Paquet A, Saint-Louis G, Guilbaud P. How Phase Modifiers Disrupt Third-phase Formation in Solvent Extraction Solutions. SOLVENT EXTRACTION AND ION EXCHANGE 2021. [DOI: 10.1080/07366299.2020.1831782] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
| | - Amaury Paquet
- CEA, DES, ISEC, DMRC, Univ. Montpellier, Marcoule, France
| | | | | |
Collapse
|
16
|
Failali A, Acher E, Vallet V, Réal F, Guillaumont D. Insights from quantum chemical calculations into inner and outer-sphere complexation of plutonium(IV) by monoamide and carbamide extractants. Phys Chem Chem Phys 2021; 23:2229-2237. [PMID: 33439157 DOI: 10.1039/d0cp05363e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The strong influence of the structure of amide derivatives on their extraction properties has been demonstrated in several studies in the literature. To investigate and rationalize the influence of the nature and length of the monoamide alkyl chains on Pu(iv) extraction/complexation, a theoretical study was performed using the Density Functional Theory (DFT) method in the scalar relativistic framework. For that, the geometries for the inner/outer-sphere complexes and interaction energies of [Pu(NO3)4] and [Pu(NO3)6]2- with different ligands have been calculated. For both inner and outer-sphere complexes, it is found that the introduction of a bulky alkyl group on the carbonyl side strongly diminishes the complexation energy. This is fully consistent with monamide extraction properties. The influence of the bulkiness of the alkyl group is as or even more important for outer than for inner-sphere interactions. This result was unexpected when considering that there are less flexibility and stronger steric constraints in the inner sphere compared to the outer one. However, this can be attributed to specific electrostatic interactions between the two outer-sphere amide ligands and two nitrate ions of [Pu(NO3)6]2-. By increasing the polarity of the solution, such interactions diminish and the outer-sphere ligands move away from [Pu(NO3)6]2-. Consequently, the solvent effects were found to be very significant for outer-sphere complexation while rather small for inner-sphere complexation. This gives the key possibility to tune the substituent effect by changing the polarity of the solution. As for carbamide ligands, it was found that the weak interactions (dispersion) have remarkable effects on both inner and outer-sphere complexations.
Collapse
Affiliation(s)
- Abdelmounaim Failali
- CEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, F-30207 Bagnols-sur-Ceze Cedex, France.
| | | | | | | | | |
Collapse
|
17
|
Felines N, Arrachart G, Giusti F, Beillard A, Marie C, Pellet-Rostaing S. Stereochemically enriched extractants for the extraction of actinides. NEW J CHEM 2021. [DOI: 10.1039/d1nj02077c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Stereoisomers of monoamide highlight the importance of the extractant chirality for U/Pu extraction.
Collapse
|
18
|
Loubert G, Henry N, Volkringer C, Duval S, Tamain C, Arab-Chapelet B, Delahaye T, Loiseau T. Quantitative Precipitation of Uranyl or Plutonyl Nitrate with N-(1-Adamantyl)acetamide in Nitric Acid Aqueous Solution. Inorg Chem 2020; 59:11459-11468. [PMID: 32799463 DOI: 10.1021/acs.inorgchem.0c01258] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reactivity of the N-(1-adamantyl)acetamide ligand (L = adam) has been evaluated as precipitating agent for the hexavalent uranyl cation ([U] = 20-60 g L-1) in concentrated nitric acid aqueous solution (0.5-5 M). It results in the formation of a crystalline complex (UO2)(adam)2(NO3)2·2(adam) (1), in which the uranyl center is 8-fold coordinated to two chelating nitrate groups and two N-(1-adamantyl)acetamide (= adam) ligands through the oxygen atom of the amide function. Two other noncoordinating adam moieties are also observed in the crystal structure packing and interact through a hydrogen-bond scheme with the uranyl-centered species. A similar molecular assembly has been obtained with the plutonyl(VI) cation, in the complex (PuO2)(adam)2(NO3)2·2(adam) (2). Precipitation studies indicate high (UO2)(adam)2(NO3)2·2(adam) formation yields (up to 99%U for an L/U molecular ratio of 5/1) for HNO3 concentration in the 0.5-5 M range. However, the precipitation kinetics is rather slow and the reaction is completed after several hours (3-4 h). The calcination of the resulting solid under an air atmosphere led to the formation of the U3O8 oxide from 400 °C through a transient phase UO2 fluorite-type (from 200 °C).
Collapse
Affiliation(s)
- Gaël Loubert
- Unité de Catalyse et Chimie du Solide (UCCS), UMR CNRS 8181, Université de Lille, Centrale Lille, Université d'Artois, Lille F-59000, France
| | - Natacha Henry
- Unité de Catalyse et Chimie du Solide (UCCS), UMR CNRS 8181, Université de Lille, Centrale Lille, Université d'Artois, Lille F-59000, France
| | - Christophe Volkringer
- Unité de Catalyse et Chimie du Solide (UCCS), UMR CNRS 8181, Université de Lille, Centrale Lille, Université d'Artois, Lille F-59000, France.,Institut Universitaire de France, 1 rue Descartes, Paris Cedex 05 75231, France
| | - Sylvain Duval
- Unité de Catalyse et Chimie du Solide (UCCS), UMR CNRS 8181, Université de Lille, Centrale Lille, Université d'Artois, Lille F-59000, France
| | | | | | | | - Thierry Loiseau
- Unité de Catalyse et Chimie du Solide (UCCS), UMR CNRS 8181, Université de Lille, Centrale Lille, Université d'Artois, Lille F-59000, France
| |
Collapse
|
19
|
Berger C, Marie C, Guillaumont D, Tamain C, Dumas T, Dirks T, Boubals N, Acher E, Laszczyk M, Berthon L. Coordination Structures of Uranium(VI) and Plutonium(IV) in Organic Solutions with Amide Derivatives. Inorg Chem 2020; 59:1823-1834. [DOI: 10.1021/acs.inorgchem.9b03024] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Clémence Berger
- CEA, DEN, DMRC, Université de Montpellier, Marcoule, 30207 Bagnols sur Cèze, France
| | - Cécile Marie
- CEA, DEN, DMRC, Université de Montpellier, Marcoule, 30207 Bagnols sur Cèze, France
| | | | - Christelle Tamain
- CEA, DEN, DMRC, Université de Montpellier, Marcoule, 30207 Bagnols sur Cèze, France
| | - Thomas Dumas
- CEA, DEN, DMRC, Université de Montpellier, Marcoule, 30207 Bagnols sur Cèze, France
| | - Thomas Dirks
- CEA, DEN, DMRC, Université de Montpellier, Marcoule, 30207 Bagnols sur Cèze, France
| | - Nathalie Boubals
- CEA, DEN, DMRC, Université de Montpellier, Marcoule, 30207 Bagnols sur Cèze, France
| | - Eléonor Acher
- CEA, DEN, DMRC, Université de Montpellier, Marcoule, 30207 Bagnols sur Cèze, France
| | - Marjorie Laszczyk
- CEA, DEN, DMRC, Université de Montpellier, Marcoule, 30207 Bagnols sur Cèze, France
| | - Laurence Berthon
- CEA, DEN, DMRC, Université de Montpellier, Marcoule, 30207 Bagnols sur Cèze, France
| |
Collapse
|
20
|
Pleines M, Hahn M, Duhamet J, Zemb T. A minimal predictive model for better formulations of solvent phases with low viscosity. EPJ NUCLEAR SCIENCES & TECHNOLOGIES 2020. [DOI: 10.1051/epjn/2019055] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The viscosity increase of the organic phase when liquid–liquid extraction processes are intensified causes difficulties for hydrometallurgical processes on industrial scale. In this work, we have analyzed this problem for the example of N,N-dialkylamides in the presence of uranyl nitrate experimentally. Furthermore, we present a minimal model at nanoscale that allows rationalizing the experimental phenomena by connecting the molecular, mesoscopic and macroscopic scale and that allows predicting qualitative trends in viscosity. This model opens broad possibilities in optimizing constraints and is a further step towards knowledge-based formulation of extracting microemulsions formed by microstructures with low connectivity, even at high load with heavy metals.
Collapse
|
21
|
Berger C, Marie C, Guillaumont D, Zekri E, Berthon L. Extraction of Uranium(VI) and Plutonium(IV) with Tetra-Alkylcarbamides. SOLVENT EXTRACTION AND ION EXCHANGE 2019. [DOI: 10.1080/07366299.2019.1630095] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Clémence Berger
- CEA, Nuclear Energy Division, Research Department on Mining and Fuel Recycling Processes, SPDS, LCPE, Bagnols-sur-Cèze, France
| | - Cécile Marie
- CEA, Nuclear Energy Division, Research Department on Mining and Fuel Recycling Processes, SPDS, LCPE, Bagnols-sur-Cèze, France
| | - Dominique Guillaumont
- CEA, Nuclear Energy Division, Research Department on Mining and Fuel Recycling Processes, SPDS, LCPE, Bagnols-sur-Cèze, France
| | - Elisabeth Zekri
- CEA, Nuclear Energy Division, Physico-Chemistry Department, SECR, LRMO, Gif-sur-Yvette, France
| | - Laurence Berthon
- CEA, Nuclear Energy Division, Research Department on Mining and Fuel Recycling Processes, SPDS, LCPE, Bagnols-sur-Cèze, France
| |
Collapse
|
22
|
Paquet A, Diat O, Berthon L, Guilbaud P. Aggregation in organic phases after solvent extraction of uranyl nitrate: X-ray scattering and molecular dynamic simulations. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.12.051] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
23
|
Acher E, Dumas T, Tamain C, Boubals N, Solari PL, Guillaumont D. Inner to outer-sphere coordination of plutonium(iv) with N,N-dialkyl amide: influence of nitric acid. Dalton Trans 2018; 46:3812-3815. [PMID: 28239724 DOI: 10.1039/c7dt00031f] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
N,N-Dialkylamides are extensively studied as alternative organic ligands to achieve the extraction and separation of uranium(vi) and plutonium(iv). We report here the coordination structures of the plutonium(iv) ion with N,N-di(2-ethylhexyl)-n-butanamide as a function of nitric acid concentration in the aqueous phase. The coordination structure of Pu(iv) evolves gradually with increasing nitric acid concentration from an inner-sphere with two coordinated amide ligands toward an outer-sphere hexanitrate complex with only nitrate ions in the first coordination sphere and protonated amide ligands in the outer shell.
Collapse
Affiliation(s)
- Eléonor Acher
- CEA Marcoule, Nuclear Energy Division, RadioChemistry & Processes Department, DRCP 30207 Bagnols-sur-Cèze, France Bagnols sur Cèze, France.
| | - Thomas Dumas
- CEA Marcoule, Nuclear Energy Division, RadioChemistry & Processes Department, DRCP 30207 Bagnols-sur-Cèze, France Bagnols sur Cèze, France.
| | - Christelle Tamain
- CEA Marcoule, Nuclear Energy Division, RadioChemistry & Processes Department, DRCP 30207 Bagnols-sur-Cèze, France Bagnols sur Cèze, France.
| | - Nathalie Boubals
- CEA Marcoule, Nuclear Energy Division, RadioChemistry & Processes Department, DRCP 30207 Bagnols-sur-Cèze, France Bagnols sur Cèze, France.
| | - Pier Lorenzo Solari
- Synchrotron SOLEIL, L'Orme des Merisiers, BP 48, St Aubin, 91192 Gif sur Yvette, France
| | - Dominique Guillaumont
- CEA Marcoule, Nuclear Energy Division, RadioChemistry & Processes Department, DRCP 30207 Bagnols-sur-Cèze, France Bagnols sur Cèze, France.
| |
Collapse
|
24
|
Drader JA, Boubals N, Camès B, Guillaumont D, Guilbaud P, Saint-Louis G, Berthon L. Radiolytic stability of N,N-dialkyl amide: effect on Pu(iv) complexes in solution. Dalton Trans 2018; 47:251-263. [PMID: 29215668 DOI: 10.1039/c7dt03447d] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The radiolytic degradation of three N,N-dialkyl amide ligands relevant to nuclear fuel reprocessing was studied. The degradation of these ligands: N,N di-2-ethyhexylbutyramide (DEHBA), N,N di-2-ethyhexylisobutyramide (DEHiBA) and N,N di-2-ethyhexyl-3-dimethylbutanamide (DEHDMBA) was examined to evaluate the effect of the structure on the formation of degradation products as well as to compare alpha induced degradation to gamma induced degradation. In situ alpha radiolysis by introduction of plutonium(iv) as the alpha source in the solution and ex situ gamma radiolysis with 60Co as the gamma source were compared. Upon identification of the main degradation products, a degradation scheme was proposed. The effects of radiation on the stability of Pu-monoamide complexes were discussed. Theoretical calculations were also performed to determine bond dissociation energy and estimate the relative strength of the bond in the molecule. The results show that neither the type of radiation (alpha vs. gamma) nor the structure modification (introduction of branching on the alkyl chain off the carbonyl carbon) of the molecule significantly impact the formation of degradation products under the conditions studied. Moreover, it was observed that the overall stability of the monoamide remains good and that Pu complexation is not greatly affected by either alpha or gamma irradiation.
Collapse
Affiliation(s)
- J A Drader
- CEA, Nuclear Energy Division, Research Department on Mining and fuel Recycling Processes, BP17171 F-30207 Bagnols-sur-Cèze, France.
| | | | | | | | | | | | | |
Collapse
|
25
|
Le Nedelec T, Charlot A, Calard F, Cuer F, Leydier A, Grandjean A. Uranium adsorption from sulfuric acid media using silica materials functionalised with amide and phosphorous ligands. NEW J CHEM 2018. [DOI: 10.1039/c8nj02601g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Identification of functional groups grafted onto silica supports to provide a promising uranium extraction capacity and a high selectivity versus iron.
Collapse
|
26
|
Loubert G, Volkringer C, Henry N, Arab-Chapelet B, Delahaye T, Loiseau T. Structural studies of a series of uranyl alkylacetamides and piracetam complexes obtained in nitric acid aqueous solution. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.09.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
27
|
Guilbaud P, Berthon L, Louisfrema W, Diat O, Zorz N. Determination of the Structures of Uranyl-Tri-n-butyl-Phosphate Aggregates by Coupling Experimental Results with Molecular Dynamic Simulations. Chemistry 2017; 23:16660-16670. [PMID: 28971546 DOI: 10.1002/chem.201703967] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Indexed: 11/10/2022]
Abstract
The complex structure of a plutonium uranium refining by extraction (PUREX) process organic phase was characterized by combining results from experiments and molecular dynamics simulations. For the first time, the molecular interactions between tri-n-butyl phosphate (TBP) and the extracted solutes, as well as TBP aggregation after the extraction of water and/or uranyl nitrate, were described and analyzed concomitantly. Coupling molecular dynamics simulations with small- and wide-angle X-ray scattering (SWAXS) experiments can lead to simulated organic solutions that are representative of the experimental ones, even for high extractant and solute concentrations. Furthermore, this coupling is well adapted for the interpretation of SWAXS experiments without preliminary hypothesis on the size or shape of aggregates. The results link together previous literature studies obtained for each level of depiction separately (complexation or aggregation). Without uranium, or at low metal concentration, almost no aggregation was observed. At high uranium concentration, organic phases contain small [UO2 (NO3 )2 (TBP)2 ]n polymetallic aggregates (with n=2 to 4), in which the 1:2 U/TBP stoichiometry is preserved.
Collapse
Affiliation(s)
- Phillipe Guilbaud
- CEA, Nuclear Energy Division, Research Department, on Mining and Fuel Recycling Processes (SPDS/LILA), BP17171, 30207, Bagnols-sur-Cèze, France
| | - Laurence Berthon
- CEA, Nuclear Energy Division, Research Department, on Mining and Fuel Recycling Processes (SPDS/LILA), BP17171, 30207, Bagnols-sur-Cèze, France
| | - Wilfried Louisfrema
- CEA, Nuclear Energy Division, Research Department, on Mining and Fuel Recycling Processes (SPDS/LILA), BP17171, 30207, Bagnols-sur-Cèze, France
| | - Olivier Diat
- Institut de Chimie Séparative de Marcoule (ICSM/ UMR 5257), CEA/CNRS/UM/ENSCM, BP17171, 30206, Bagnols-sur-Cèze, France
| | - Nicole Zorz
- CEA, Nuclear Energy Division, Research Department, on Mining and Fuel Recycling Processes (SPDS/LILA), BP17171, 30207, Bagnols-sur-Cèze, France
| |
Collapse
|
28
|
McCann K, Drader JA, Braley JC. Comparing Branched versus Straight-chained Monoamide Extractants for Actinide Recovery. SEPARATION AND PURIFICATION REVIEWS 2017. [DOI: 10.1080/15422119.2017.1321018] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Kevin McCann
- Department of Chemistry, Colorado School of Mines, Golden, Colorado, USA
| | - Jessica A. Drader
- Department of Chemistry, Colorado School of Mines, Golden, Colorado, USA
| | - Jenifer C. Braley
- Department of Chemistry, Colorado School of Mines, Golden, Colorado, USA
| |
Collapse
|
29
|
Charlot A, Dumas T, Solari PL, Cuer F, Grandjean A. A Spectroscopic Study of Uranium and Molybdenum Complexation within the Pore Channels of Hybrid Mesoporous Silica. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201601085] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Alexandre Charlot
- CEA DEN DTDC SPDE Laboratoire des Procédés Supercritiques de Séparation 30207 Bagnols‐sur‐Cèze France
- CEA DEN DTDC SPDE Laboratoire de Développement des Procédés de Séparation 30207 Bagnols‐sur‐Cèze France
| | - Thomas Dumas
- CEA DEN DTDC SPDE Laboratoire d'Interaction Ligands Actinides 30207 Bagnols‐sur‐Cèze France
| | - Pier L. Solari
- Synchrotron SOLEIL L'Orme des Merisiers Saint‐Aubin, BP 48 91192 Gif‐sur‐Yvette Cedex France
| | - Frédéric Cuer
- CEA DEN DTDC SPDE Laboratoire de Développement des Procédés de Séparation 30207 Bagnols‐sur‐Cèze France
| | - Agnès Grandjean
- CEA DEN DTDC SPDE Laboratoire des Procédés Supercritiques de Séparation 30207 Bagnols‐sur‐Cèze France
| |
Collapse
|
30
|
Moeyaert P, Dumas T, Guillaumont D, Kvashnina K, Sorel C, Miguirditchian M, Moisy P, Dufrêche JF. Modeling and Speciation Study of Uranium(VI) and Technetium(VII) Coextraction with DEHiBA. Inorg Chem 2016; 55:6511-9. [DOI: 10.1021/acs.inorgchem.6b00595] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pauline Moeyaert
- French Alternative Energies and Atomic Energy Commission, CEA, Nuclear Energy Division, Radio Chemistry & Processes Department, DRCP, BP 17171, F-30207 Bagnols sur Cèze, France
| | - Thomas Dumas
- French Alternative Energies and Atomic Energy Commission, CEA, Nuclear Energy Division, Radio Chemistry & Processes Department, DRCP, BP 17171, F-30207 Bagnols sur Cèze, France
| | - Dominique Guillaumont
- French Alternative Energies and Atomic Energy Commission, CEA, Nuclear Energy Division, Radio Chemistry & Processes Department, DRCP, BP 17171, F-30207 Bagnols sur Cèze, France
| | - Kristina Kvashnina
- European Synchrotron Radiation Facility, 38000 Grenoble, France
- iHelmholtz Zentrum Dresden-Rossendorf, Institute of Resource Ecology, 01314 Dresden, Germany
| | - Christian Sorel
- French Alternative Energies and Atomic Energy Commission, CEA, Nuclear Energy Division, Radio Chemistry & Processes Department, DRCP, BP 17171, F-30207 Bagnols sur Cèze, France
| | - Manuel Miguirditchian
- French Alternative Energies and Atomic Energy Commission, CEA, Nuclear Energy Division, Radio Chemistry & Processes Department, DRCP, BP 17171, F-30207 Bagnols sur Cèze, France
| | - Philippe Moisy
- French Alternative Energies and Atomic Energy Commission, CEA, Nuclear Energy Division, Radio Chemistry & Processes Department, DRCP, BP 17171, F-30207 Bagnols sur Cèze, France
| | - Jean-François Dufrêche
- Institut de Chimie Séparative de Marcoule, Université de Montpellier 2, UMR 5257 CEA/CNRS/UM2/ENSCM BP 17171 30207 Bagnols
sur Cèze Cedex, France
| |
Collapse
|
31
|
Acher E, Hacene Cherkaski Y, Dumas T, Tamain C, Guillaumont D, Boubals N, Javierre G, Hennig C, Solari PL, Charbonnel MC. Structures of Plutonium(IV) and Uranium(VI) with N,N-Dialkyl Amides from Crystallography, X-ray Absorption Spectra, and Theoretical Calculations. Inorg Chem 2016; 55:5558-69. [DOI: 10.1021/acs.inorgchem.6b00592] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Eléonor Acher
- CEA Marcoule, Nuclear Energy Division, RadioChemistry & Processes Department, DRCP 30207 Bagnols-sur-Cèze, France Bagnols sur Cèze, France
| | - Yanis Hacene Cherkaski
- CEA Marcoule, Nuclear Energy Division, RadioChemistry & Processes Department, DRCP 30207 Bagnols-sur-Cèze, France Bagnols sur Cèze, France
| | - Thomas Dumas
- CEA Marcoule, Nuclear Energy Division, RadioChemistry & Processes Department, DRCP 30207 Bagnols-sur-Cèze, France Bagnols sur Cèze, France
| | - Christelle Tamain
- CEA Marcoule, Nuclear Energy Division, RadioChemistry & Processes Department, DRCP 30207 Bagnols-sur-Cèze, France Bagnols sur Cèze, France
| | - Dominique Guillaumont
- CEA Marcoule, Nuclear Energy Division, RadioChemistry & Processes Department, DRCP 30207 Bagnols-sur-Cèze, France Bagnols sur Cèze, France
| | - Nathalie Boubals
- CEA Marcoule, Nuclear Energy Division, RadioChemistry & Processes Department, DRCP 30207 Bagnols-sur-Cèze, France Bagnols sur Cèze, France
| | - Guilhem Javierre
- CEA Marcoule, Nuclear Energy Division, RadioChemistry & Processes Department, DRCP 30207 Bagnols-sur-Cèze, France Bagnols sur Cèze, France
| | - Christoph Hennig
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01314 Dresden, Germany
| | - Pier Lorenzo Solari
- Synchrotron SOLEIL, L’Orme des Merisiers, BP 48, St Aubin, 91192 Gif sur Yvette, France
| | - Marie-Christine Charbonnel
- CEA Marcoule, Nuclear Energy Division, RadioChemistry & Processes Department, DRCP 30207 Bagnols-sur-Cèze, France Bagnols sur Cèze, France
| |
Collapse
|
32
|
Pecheur O, Guillaumont D, Dourdain S, Berthon L, Turgis R, Fillaux C, Arrachart G, Testard F. Uranium Extraction by a Bifunctional Amido-Phosphonic Acid: Coordination Structure and Aggregation. SOLVENT EXTRACTION AND ION EXCHANGE 2016. [DOI: 10.1080/07366299.2016.1169146] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
33
|
Muller JM, Berthon C, Couston L, Zorz N, Simonin JP, Berthon L. Extraction of Lanthanides(III) by a Mixture of a Malonamide and a Dialkyl Phosphoric Acid. SOLVENT EXTRACTION AND ION EXCHANGE 2016. [DOI: 10.1080/07366299.2015.1135030] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
34
|
Qiao B, Ferru G, Olvera de la Cruz M, Ellis RJ. Molecular Origins of Mesoscale Ordering in a Metalloamphiphile Phase. ACS CENTRAL SCIENCE 2015; 1:493-503. [PMID: 27163014 PMCID: PMC4827664 DOI: 10.1021/acscentsci.5b00306] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Indexed: 05/19/2023]
Abstract
Controlling the assembly of soft and deformable molecular aggregates into mesoscale structures is essential for understanding and developing a broad range of processes including rare earth extraction and cleaning of water, as well as for developing materials with unique properties. By combined synchrotron small- and wide-angle X-ray scattering with large-scale atomistic molecular dynamics simulations we analyze here a metalloamphiphile-oil solution that organizes on multiple length scales. The molecules associate into aggregates, and aggregates flocculate into meso-ordered phases. Our study demonstrates that dipolar interactions, centered on the amphiphile headgroup, bridge ionic aggregate cores and drive aggregate flocculation. By identifying specific intermolecular interactions that drive mesoscale ordering in solution, we bridge two different length scales that are classically addressed separately. Our results highlight the importance of individual intermolecular interactions in driving mesoscale ordering.
Collapse
Affiliation(s)
- Baofu Qiao
- Chemical
Sciences and Engineering Division, Argonne
National Laboratory, Argonne, Illinois 60439, United States
- E-mail:
| | - Geoffroy Ferru
- Chemical
Sciences and Engineering Division, Argonne
National Laboratory, Argonne, Illinois 60439, United States
| | - Monica Olvera de la Cruz
- Department of Materials
Science and Engineering and Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Ross J. Ellis
- Chemical
Sciences and Engineering Division, Argonne
National Laboratory, Argonne, Illinois 60439, United States
- E-mail:
| |
Collapse
|
35
|
Rey J, Dourdain S, Berthon L, Jestin J, Pellet-Rostaing S, Zemb T. Synergy in Extraction System Chemistry: Combining Configurational Entropy, Film Bending, and Perturbation of Complexation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:7006-7015. [PMID: 26053416 DOI: 10.1021/acs.langmuir.5b01478] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Iron-uranium selectivity in liquid-liquid extraction depends not only on the mole fraction of extractants, but also on the nature of the diluent used, even if the diluent has no complexation interaction with the extracted ions. Modeling strong nonlinearity is difficult to parametrize without a large number of parameters, interpreted as "apparent constants". We determine in this paper the synergy curve versus mole fraction of HDEHP-TOPO (di(2-ethylexyl) phosphoric acid/tri-n-octyl phosphine oxide) and compare the free energy of aggregation to the free energy of extraction in various diluents. There is always a concomitant maximum of the two quantities, but with a gradual influence on intensity. The diluent is wetting the chains of the reverse aggregates responsible of the extraction. We show here that the intensity of the unexplained synergy peak is strongly dependent on the "penetrating" or "nonpenetrating" nature of the diluent. This experimental determination allows us to attribute the synergy to a combination of entropic effects favoring extraction, opposed to perturbation of the first coordination sphere by penetration as well as surfactant film bending energy.
Collapse
Affiliation(s)
- J Rey
- †ICSM/LTSM, CEA/CNRS/UM2/ENSCM UMR5257, Site de Marcoule, Bat. 426, 30207 Bagnols sur Cèze, France
| | - S Dourdain
- †ICSM/LTSM, CEA/CNRS/UM2/ENSCM UMR5257, Site de Marcoule, Bat. 426, 30207 Bagnols sur Cèze, France
| | | | - J Jestin
- §Laboratoire Léon Brillouin CEA/CNRS, CEA Saclay, 91191 Gif-sur-Yvette, France
| | - S Pellet-Rostaing
- †ICSM/LTSM, CEA/CNRS/UM2/ENSCM UMR5257, Site de Marcoule, Bat. 426, 30207 Bagnols sur Cèze, France
| | - T Zemb
- †ICSM/LTSM, CEA/CNRS/UM2/ENSCM UMR5257, Site de Marcoule, Bat. 426, 30207 Bagnols sur Cèze, France
| |
Collapse
|
36
|
Depletion of water-in-oil aggregates from poor solvents: Transition from weak aggregates towards reverse micelles. Curr Opin Colloid Interface Sci 2015. [DOI: 10.1016/j.cocis.2014.11.011] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
37
|
Sieffert N, Wipff G. Uranyl extraction by N,N-dialkylamide ligands studied using static and dynamic DFT simulations. Dalton Trans 2015; 44:2623-38. [DOI: 10.1039/c4dt02443e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
DFT/MM-MD simulations highlight the structure and dynamics of mixed uranyl/nitrato/monoamides (L) complexes at an “oil”/water interface.
Collapse
Affiliation(s)
| | - Georges Wipff
- UMR 7177 CNRS
- Laboratoire MSM
- Institut de Chimie
- Université de Strasbourg
- 67000 Strasbourg
| |
Collapse
|