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Kinetics and mechanism of Eu(III) transfer in tributyl phosphate microdroplet/HNO 3 aqueous solution system revealed by fluorescence microspectroscopy. ANAL SCI 2022; 38:955-961. [PMID: 35551644 DOI: 10.1007/s44211-022-00117-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 04/19/2022] [Indexed: 11/01/2022]
Abstract
In this study, we reveal an Eu(III) extraction mechanism at the interface between HNO3 and tributyl phosphate (TBP) solutions using fluorescence microspectroscopy. The mass transfer rate constant at the interface is obtained from the analysis of fluorescence intensity changes during the forward and backward extractions at various HNO3 and TBP concentrations to investigate the reaction mechanism. This result indicates that one nitrate ion reacts with Eu(III) at the interface, whereas TBP molecules are not involved in the interfacial reaction, which is different from the results obtained using the NaNO3 solution in our previous study. We demonstrate that the chemical species of Eu(III) complex with nitrate ion and TBP in the aqueous solution play an important role for the extraction mechanism. The rate constants of the interfacial reactions in the forward and backward extractions are (4.0-5.0) × 10-7 m M-1 s-1 and (3.2-3.3) × 10-6 m s-1, respectively. We expect that our revealed mechanism provides useful and fundamental knowledge for actual solvent extraction.
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2
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Miyagawa A, Kusano Y, Nakagawa R, Nagatomo S, Sano Y, Nakatani K. Kinetically revealed transfer mechanism of europium (III) in tributyl phosphate microdroplet/NaNO3 aqueous solution system by fluorescence microspectroscopy. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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3
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Bertelsen ER, Antonio MR, Jensen MP, Shafer JC. Electrochemistry of PUREX: R is for reduction and ion transfer. SOLVENT EXTRACTION AND ION EXCHANGE 2021. [DOI: 10.1080/07366299.2021.1920674] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Erin R. Bertelsen
- Department of Chemistry, Colorado School of Mines, Golden, Colorado, USA
| | - Mark R. Antonio
- Chemical Sciences & Engineering Division, Argonne National Laboratory, Lemont, Illinois, USA
| | - Mark P. Jensen
- Department of Chemistry, Colorado School of Mines, Golden, Colorado, USA
- Nuclear Science and Engineering Program, Colorado School of Mines, Golden, Colorado, USA
| | - Jenifer C. Shafer
- Department of Chemistry, Colorado School of Mines, Golden, Colorado, USA
- Nuclear Science and Engineering Program, Colorado School of Mines, Golden, Colorado, USA
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Okudaira T, Ueda Y, Hiroi K, Motokawa R, Inamura Y, Takata SI, Oku T, Suzuki JI, Takahashi S, Endo H, Iwase H. Polarization analysis for small-angle neutron scattering with a 3He spin filter at a pulsed neutron source. J Appl Crystallogr 2021. [DOI: 10.1107/s1600576721001643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Neutron polarization analysis (NPA) for small-angle neutron scattering (SANS) experiments using a pulsed neutron source was successfully achieved by applying a 3He spin filter as a spin analyzer for the neutrons scattered from the sample. The cell of the 3He spin filter gives a weak small-angle scattering intensity (background) and covers a sufficient solid angle for performing SANS experiments. The relaxation time of the 3He polarization is sufficient for continuous use for approximately 2 days, thus reaching the typical duration required for a complete set of SANS experiments. Although accurate evaluation of the incoherent neutron scattering, which is predominantly attributable to the extremely large incoherent scattering cross section of hydrogen atoms in samples, is difficult using calculations based on the sample elemental composition, the developed NPA approach with consideration of the influence of multiple neutron scattering enabled reliable decomposition of the SANS intensity distribution into the coherent and incoherent scattering components. To date, NPA has not been well established as a standard technique for SANS experiments at pulsed neutron sources such as the Japan Proton Accelerator Research Complex (J-PARC) and the US Spallation Neutron Source. It is anticipated that this work will contribute significantly to the accurate determination of the coherent neutron scattering component for scatterers in various types of organic sample systems in SANS experiments at J-PARC, particularly for systems involving competition between the coherent and incoherent scattering intensity.
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El-Eswed BI, Sunjuk M, Ghuneim R, Al-Degs YS, Al Rimawi M, Albawarshi Y. Competitive extraction of Li, Na, K, Mg and Ca ions from acidified aqueous solutions into chloroform layer containing diluted alkyl phosphates. J Colloid Interface Sci 2020; 587:229-239. [PMID: 33360895 DOI: 10.1016/j.jcis.2020.12.029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 12/07/2020] [Accepted: 12/13/2020] [Indexed: 11/27/2022]
Abstract
Alkyl phosphates were extensively used in liquid-liquid extraction of lanthanides and actinides, but to a lesser extent for alkali and alkaline earth metals. The high amount of alkyl phosphate, which is usually used in the organic layer (>40 wt%), is not favoured due to its corrosive effect and toxicity. In the present work, diluted chloroform solutions (20.0 mM) of tri-n-butyl phosphate (TBP), tris(2-ethylhexyl) phosphates (TRIS) and bis(2-ethylhexyl) phosphate (BIS) were investigated for their extraction of Li, Na, K, Mg and Ca ions. The extraction experiments were conducted on 7.0 M HNO3 aqueous solutions containing 60.0 mM of metal ions in binary (Li+ and Mg2+), ternary (Li+, Na+ and K+) and quinary (Li+, Na+, K+, Mg2+ and Ca2+) mixtures. The Li+ selectivity over Mg2+ was very high in the binary system. Remarkably, increasing HNO3 concentration in the aqueous layer had opposing effect on the extraction of Li+ (positive) and Mg2+ (negative). However, the selectivity for Li+ became less dramatic in the case of ternary and quinary system, though the selectivity varied with initial metal concentrations. The amounts of water and NO3- transferred into the organic layer demonstrated their synergistic effect on extracting metal ions. In the ternary and quinary systems, the total concentrations of metal ions in the organic layer (ranged from 49 to 85 mM) were higher than the concentration of ligand in the organic layer (20.0 mM), suggesting that metal ions may be extracted into water/ligand/NO3- aggregates in the organic layer. TBP, TRIS and BIS do not have significant difference in their extraction behaviour. The FTIR results indicated formation of P+-O-M+/M2+ in the solid TBP/metal complex.
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Affiliation(s)
- Bassam I El-Eswed
- Department of Basic Sciences, Zarqa University College, Al-Balqa Applied University, Jordan.
| | - Mahmoud Sunjuk
- Department of Chemistry, Faculty of Science, The Hashemite University, P. O. Box 330127, Zarqa 13133, Jordan.
| | - Raed Ghuneim
- Department of Chemistry, Faculty of Science, The Hashemite University, P. O. Box 330127, Zarqa 13133, Jordan
| | - Yahya S Al-Degs
- Department of Chemistry, Faculty of Science, The Hashemite University, P. O. Box 330127, Zarqa 13133, Jordan.
| | - Maha Al Rimawi
- Department of Medical Allied Sciences, Zarqa University College, Al-Balqa Applied University, Jordan.
| | - Yanal Albawarshi
- Department of Medical Allied Sciences, Zarqa University College, Al-Balqa Applied University, Jordan.
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Tan B, Chang C, Xu D, Wang Y, Qi T. Modeling of the Competition between Uranyl Nitrate and Nitric Acid upon Extraction with Tri- n-butyl Phosphate. ACS OMEGA 2020; 5:12174-12183. [PMID: 32548399 PMCID: PMC7271375 DOI: 10.1021/acsomega.0c00583] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Accepted: 04/10/2020] [Indexed: 06/11/2023]
Abstract
Uranium is a strategic element and plays an important role in energy resources. A H2O-HNO3-UO2(NO3)2-TBP (tri-n-butyl phosphate)-diluent system is commonly used for uranium separation and purification in liquid-liquid extraction. Uranyl nitrate is promoted by the existence of nitrate at low HNO3 concentrations but is inhibited at high HNO3 concentrations. Considering the competitive extraction between HNO3 and UO2(NO3)2, a generic extraction model is developed. The activities of components in the aqueous phase were estimated using Pitzer models. The thermodynamic equilibrium constants and Pitzer parameters were regressed by experimental data. The resulting model was able to successfully predict uranyl nitrate, nitric acid, and water extraction over a large range of conditions (U, 0-1.8 mol/L; HNO3, 0-10 mol/L; TBP, 5-100 vol %) within average absolute relative deviations of 11.2, 15.7, and 23.8%, respectively. The predicted results show that water and nitric acid were extracted as di-solvates HNO3·(TBP)2·H2O and (TBP)2·2H2O at low nitric acid concentrations, with the formation of mono-solvates HNO3·TBP and HNO3·TBP·H2O as the acid concentration increased. Uranyl nitrate was shown to be rejected from the organic phase as the formation of HNO3·TBP and HNO3·TBP·H2O in acid was extracted at high acid concentrations.
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Affiliation(s)
- Boren Tan
- National
Engineering Laboratory for Hydrometallurgical Cleaner Production Technology,
Institute of Process Engineering, Chinese
Academy of Sciences, Beijing 100089, P. R. China
- University
of Chinese Academy of Sciences, Beijing 101400, P. R.
China
| | - Chao Chang
- National
Engineering Laboratory for Hydrometallurgical Cleaner Production Technology,
Institute of Process Engineering, Chinese
Academy of Sciences, Beijing 100089, P. R. China
| | - Dongbing Xu
- National
Engineering Laboratory for Hydrometallurgical Cleaner Production Technology,
Institute of Process Engineering, Chinese
Academy of Sciences, Beijing 100089, P. R. China
| | - Yong Wang
- National
Engineering Laboratory for Hydrometallurgical Cleaner Production Technology,
Institute of Process Engineering, Chinese
Academy of Sciences, Beijing 100089, P. R. China
| | - Tao Qi
- National
Engineering Laboratory for Hydrometallurgical Cleaner Production Technology,
Institute of Process Engineering, Chinese
Academy of Sciences, Beijing 100089, P. R. China
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Mu J, Motokawa R, Akutsu K, Nishitsuji S, Masters AJ. A Novel Microemulsion Phase Transition: Toward the Elucidation of Third-Phase Formation in Spent Nuclear Fuel Reprocessing. J Phys Chem B 2018; 122:1439-1452. [DOI: 10.1021/acs.jpcb.7b08515] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Junju Mu
- School
of Chemical Engineering and Analytical Science, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Ryuhei Motokawa
- Hierarchical
Structure Research Group, Materials Sciences Research Center, Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - Kazuhiro Akutsu
- Research
Centre for Neutron Science and Technology, Comprehensive Research Organization for Science and Society (CROSS), Tokai, Ibaraki 319-1106, Japan
| | - Shotaro Nishitsuji
- Graduate
School of Science and Engineering, Yamagata University, Yonezawa, Yamagata 992-8510, Japan
| | - Andrew J. Masters
- School
of Chemical Engineering and Analytical Science, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
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8
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Suresh A, Jayalakshmi S, Sarkar S, Sivaraman N. Effects of temperature on the extraction of U(VI) and Pu(IV) by tris(2-methylbutyl) phosphate from nitric acid media. RADIOCHIM ACTA 2017. [DOI: 10.1515/ract-2017-2833] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Extraction behavior of tris(2-methylbutyl) phosphate (T2MBP), a higher homologue of tri-n-butyl phosphate (TBP), in the extraction of U(VI) and Pu(IV) from nitric acid media has been evaluated in the present study. Distribution ratios for the extraction of these metal ions by T2MBP were measured as a function of equilibrium aqueous phase nitric acid concentration, extractant concentration and temperature to understand the temperature effects on extraction. Enthalpies of extraction of T2MBP/n-dodecane-U(VI)-HNO3 and T2MBP/n-dodecane-Pu(IV)-HNO3 systems were calculated from the distribution ratio data using “second law” method. The data reveal that the extraction of U(VI) by T2MBP is exothermic in nature, whereas that of Pu(IV) is endothermic.
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Affiliation(s)
- A. Suresh
- Fuel Chemistry Division, Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, HBNI , Kalpakkam 603102 , India , Fax: +91-44-27480065
| | - S. Jayalakshmi
- Fuel Chemistry Division, Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, HBNI , Kalpakkam 603102 , India
| | - Subramee Sarkar
- Fuel Chemistry Division, Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, HBNI , Kalpakkam 603102 , India
| | - N. Sivaraman
- Fuel Chemistry Division, Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, HBNI , Kalpakkam 603102 , India
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Balasubramonian S, Sinha PK, Sivakumar D, Mishra AK, Sampath M, Pandey NK, Kumar S. Modeling of simultaneous extraction of uranyl nitrate and nitric acid by 36 vol.% tri-iso-amyl phosphate in n-dodecane. J Radioanal Nucl Chem 2017. [DOI: 10.1007/s10967-017-5474-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Gaillard DC, Boltoeva M, Billard I, Georg S, Mazan V, Ouadi A, Ternova D, Hennig C. Insights into the Mechanism of Extraction of Uranium (VI) from Nitric Acid Solution into an Ionic Liquid by using Tri-n-butyl phosphate. Chemphyschem 2015; 16:2653-62. [DOI: 10.1002/cphc.201500283] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Revised: 05/04/2015] [Indexed: 11/08/2022]
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11
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Ye X, Cui S, de Almeida VF, Khomami B. Molecular Simulation of Water Extraction into a Tri-n-Butylphosphate/n-Dodecane Solution. J Phys Chem B 2013; 117:14835-41. [DOI: 10.1021/jp409332b] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xianggui Ye
- Materials Research
and Innovative Laboratory (MRAIL), Department of Chemical
and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Shengting Cui
- Materials Research
and Innovative Laboratory (MRAIL), Department of Chemical
and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Valmor F. de Almeida
- Chemical
Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6181, United States
| | - Bamin Khomami
- Materials Research
and Innovative Laboratory (MRAIL), Department of Chemical
and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
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Jové Colón CF, Moffat HK, Rao RR. Modeling of Liquid-Liquid Extraction (LLE) Equilibria Using Gibbs Energy Minimization (GEM) for the System TBP–HNO3–UO2–H2O–Diluent. SOLVENT EXTRACTION AND ION EXCHANGE 2013. [DOI: 10.1080/00397911.2013.785882] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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Anderson TL, Braatz A, Ellis RJ, Antonio MR, Nilsson M. Synergistic Extraction of Dysprosium and Aggregate Formation in Solvent Extraction Systems Combining TBP and HDBP. SOLVENT EXTRACTION AND ION EXCHANGE 2013. [DOI: 10.1080/07366299.2013.787023] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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Schurhammer R, Wipff G. Liquid−Liquid Extraction of Pertechnetic Acid (TcVII) by Tri-n-butyl Phosphate: Where Is the Proton? A Molecular Dynamics Investigation. J Phys Chem B 2011; 115:2338-48. [DOI: 10.1021/jp111758s] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rachel Schurhammer
- Laboratoire MSM, UMR CNRS 7177, Institut de Chimie, 4 rue B. Pascal, 67 000 Strasbourg, France
| | - Georges Wipff
- Laboratoire MSM, UMR CNRS 7177, Institut de Chimie, 4 rue B. Pascal, 67 000 Strasbourg, France
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Cote G. The supramolecular speciation: a key for improved understanding and modelling of chemical reactivity in complex systems. RADIOCHIM ACTA 2009. [DOI: 10.1524/ract.91.11.639.23471] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
The objective of this paper is to show through various examples that the "supramolecular" speciation is a key for the understanding and modelling of phenomena as varied as unusually rapid mass transfers in solvent extraction, organic phase splitting in liquid-liquid systems and complex behaviours of the organic matter in the environment.
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Moyer BA, Baes CF, Case FI, Driver JL. LIQUID–LIQUID EQUILIBRIUM ANALYSIS IN PERSPECTIVE II. COMPLETE MODEL OF WATER, NITRIC ACID, AND URANYL NITRATE EXTRACTION BY DI-2-ETHYLHEXYL SULFOXIDE IN DODECANE. SOLVENT EXTRACTION AND ION EXCHANGE 2001. [DOI: 10.1081/sei-100107024] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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17
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Baaden M, Berny F, Wipff G. The chloroform / TBP / aqueous nitric acid interfacial system: a molecular dynamics investigation. J Mol Liq 2001. [DOI: 10.1016/s0167-7322(00)00174-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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18
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Naganawa H, Suzuki H, Tachimori S, Nasu A, Sekine T. Effect of the Hydrophobic Anion of Picrate on the Extraction of Europium(III) with Diamide. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2000. [DOI: 10.1246/bcsj.73.623] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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