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Das A, Musharaf Ali S. Structure and dynamics of dissociated and undissociated forms of nitric acid and their implications in interfacial mass transfer: insights from molecular dynamics simulations. Phys Chem Chem Phys 2024; 26:6916-6938. [PMID: 38334446 DOI: 10.1039/d3cp05622h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
Nitric acid (HNO3) is widely used in various chemical and nuclear industries. Therefore, it is important to develop an understanding of the different forms of nitric acid for its practical applications. Molecular dynamics (MD) simulation is one of the best tools to investigate the behavior of concentrated nitric acid in aqueous solution with various forms together with pure nitric acid to identify a suitable model of nitric acid for use in simulations of biphasic systems for interfacial mass transfer. The Mulliken partial charge embedded OPLS-AA force field was used to model the neutral nitric acid, hydronium ion and nitrate ion, and it was found that the Mulliken partial charge embedded force field works quite well. The computed density of the dissociated and mixed-form acid was in good agreement with the experimental values. In water, the HNO3 molecule was seen to be coordinated with three water molecules in the first sphere of coordination. The distribution of water surrounding the HNO3 molecule and nitrate ion was corroborated by the DFT-optimized hydrated cluster. The calculated diffusivity values of the neutral acid and ions were significantly higher in the mixed form of nitric acid, which is an important dynamic quantity controlling the kinetics of the liquid-liquid interfacial extraction. The structural analysis revealed that the local aggregation is minimized when both forms of acid are present together in the solution. The water-ion and water-neutral acid interactions were predicted to be enhanced, as confirmed by H-bond studies. The shear viscosity of the mixed acid exhibited excellent agreement with the experimental values, which again confirms the consideration of the mixed form of nitric acid. The simulated value of surface tension for the mixed form of acid also appeared to be quite accurate based on the surface tension of water. The mixed form of nitric acid comprising both forms of acid is the best representation for nitric acid to be considered for MD simulations of biphasic systems. The mixed form of nitric acid established that the concentrated nitric acid may not be present either in the fully dissociated form or fully undissociated form in the solution.
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Affiliation(s)
- Arya Das
- Nuclear Recycle Board, Bhabha Atomic Research Centre, Mumbai, 400094, India
- Homi Bhabha National Institute, Mumbai, 400094, India.
| | - Sk Musharaf Ali
- Chemical Engineering Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
- Homi Bhabha National Institute, Mumbai, 400094, India.
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2
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Hoinkis N, Litter MI. Mechanisms of Sonochemical Transformation of Nitrate and Nitrite under Different Conditions: Influence of Additives and pH. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Nina Hoinkis
- Chemistry Department, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, 55128Mainz, Germany
| | - Marta I. Litter
- Institute of Environmental Research and Engineering−Habitat and Sustainability School, National University of San Martín-CONICET, Campus Miguelete, Av. 25 de Mayo y Francia, 1650San Martín, Provincia de Buenos Aires, Argentina
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3
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Thermodynamic Modeling of Nitric Acid Speciation Using eUNIQUAC Activity Coefficient Model. J SOLUTION CHEM 2021. [DOI: 10.1007/s10953-021-01124-0] [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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4
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Kajan I, Florianová M, Ekberg C, Matyskin AV. Effect of diluent on the extraction of europium(iii) and americium(iii) with N, N, N', N'-tetraoctyl diglycolamide (TODGA). RSC Adv 2021; 11:36707-36718. [PMID: 35494375 PMCID: PMC9043636 DOI: 10.1039/d1ra07534a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 11/08/2021] [Indexed: 12/19/2022] Open
Abstract
Solvent extraction of Eu3+ and Am3+ via N,N,N',N'-tetraoctyl diglycolamide (TODGA) dissolved in different molecular diluents was studied. The diluent types used in this work were primary and secondary alcohols, secondary ketones and alkanes. Effects of concentration of extracting agent, temperature, diluent type and its carbon chain length on the extractions were determined. Distribution ratios of Eu3+ and Am3+ showed high dependence on the diluent type as well as the carbon chain length within the same type of diluent. The highest distribution ratios for both Eu3+ and Am3+ as well as the separation factors of Eu3+ over Am3+ were observed in the alkane diluents. Unexpectedly high distribution ratios for Eu3+ and Am3+ were observed in polar diluents with 5 carbon atoms in the chain, clearly standing out against the general trends. It was found that Eu3+ and Am3+ extraction via TODGA is enthalpy driven in all the studied diluents and that extraction is more exothermic in alkane diluents. Analysis of the stoichiometry of the extracted complexes shows that the average ligand number of TODGA molecules in the extracted complex is lower for Am3+ compared to Eu3+ except for with alkane diluents.
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Affiliation(s)
- Ivan Kajan
- Laboratory of Radiochemistry, Paul Scherrer Institute 5232 Villigen Switzerland
| | - Markéta Florianová
- Department of Nuclear Chemistry, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University Brehova 7 11519 Prague 1 Czech Republic
| | - Christian Ekberg
- Nuclear Chemistry and Industrial Material Recycling Group, Department of Chemistry and Chemical Engineering, Chalmers University of Technology 41296 Gothenburg Sweden
| | - Artem V Matyskin
- Nuclear Chemistry and Industrial Material Recycling Group, Department of Chemistry and Chemical Engineering, Chalmers University of Technology 41296 Gothenburg Sweden
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Simonnet M, Barré N, Drot R, Le Naour C, Sladkov V, Delpech S. Thorium oxide dissolution in HNO3-HF mixture: kinetics and mechanism. RADIOCHIM ACTA 2018. [DOI: 10.1515/ract-2018-3052] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
This paper is an attempt to find out thorium oxide dissolution mechanism in HNO3-HF mixture. In a previous paper, several parameters effects on thorium oxide dissolution have been described, with specific focus on hydrofluoric acid effect, which can lead to an increase of the dissolution rate if present in small amount, but precipitates as ThF4 at higher content. Based on this previous study, experimental data were fitted using several dissolution models in order to find out the best one. Finally, a revisited model based on literature and considering the ThF4 formation was proposed. It describes the main steps of dissolution and is able to fit the experimental data for a wide range of solution compositions. This point is crucial since it allows considering an extrapolation of the established model to not-yet-studied conditions.
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Affiliation(s)
- Marie Simonnet
- Institut de Physique Nucléaire, CNRS-IN2P3, Paris-Sud, Université Paris-Saclay , Orsay Cedex 91406 , France
| | - Nicole Barré
- Institut de Physique Nucléaire, CNRS-IN2P3, Paris-Sud, Université Paris-Saclay , Orsay Cedex 91406 , France
| | - Romuald Drot
- Institut de Physique Nucléaire, CNRS-IN2P3, Paris-Sud, Université Paris-Saclay , Orsay Cedex 91406 , France
| | - Claire Le Naour
- Institut de Physique Nucléaire, CNRS-IN2P3, Paris-Sud, Université Paris-Saclay , Orsay Cedex 91406 , France
| | - Vladimir Sladkov
- Institut de Physique Nucléaire, CNRS-IN2P3, Paris-Sud, Université Paris-Saclay , Orsay Cedex 91406 , France
| | - Sylvie Delpech
- Institut de Physique Nucléaire, CNRS-IN2P3, Paris-Sud, Université Paris-Saclay , Orsay Cedex 91406 , France
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6
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Mazan V, Boltoeva M. Aqueous acidic solution - ionic liquid biphasic system: An original investigation by diffusion ordered spectroscopy nuclear magnetic resonance. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.08.086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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7
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MVSR RK, S P, Narasimhan S, Murty B N. Development of a Thermodynamic Model Using a Speciation Framework: Illustration on the HNO 3–H 2O System. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.7b05361] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ravi Kanth MVSR
- Nuclear Fuel Complex, Department of Atomic Energy, Hyderabad, India, 500062
| | - Pushpavanam S
- Department of Chemical Engineering, Indian Institute of Technology, Madras, India, 600036
| | - Shankar Narasimhan
- Department of Chemical Engineering, Indian Institute of Technology, Madras, India, 600036
| | - Narasimha Murty B
- Nuclear Fuel Complex, Department of Atomic Energy, Hyderabad, India, 500062
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Musat R, Denisov SA, Marignier JL, Mostafavi M. Decoding the Three-Pronged Mechanism of NO 3• Radical Formation in HNO 3 Solutions at 22 and 80 °C Using Picosecond Pulse Radiolysis. J Phys Chem B 2018; 122:2121-2129. [PMID: 29365267 DOI: 10.1021/acs.jpcb.7b12702] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
With nitric acid (HNO3) being at the core of nuclear technology through actinides separation and extraction processes, achieving a complete characterization of the complex processes involving concentrated HNO3 solutions under ionizing radiation equates bringing efficiency and safety into their operation. In this work, the three mechanisms contributing to the formation of nitrate radicals (NO3•) in concentrated nitric acid were investigated by measuring the radiolytic yield of NO3• in HNO3 solutions (0.5-23.5 M) at room (22.5 °C) and elevated (80 °C) temperatures on time scales spanning from picosecond to microsecond by pulse radiolysis measurements. We conclude that the formation yield of NO3•, just after the 7 ps electron pulse, is due to the direct effect and to the ultrafast electron transfer reaction between NO3- and the water cation radical, H2O•+. The absolute formation yield of NO3• radicals due to the direct effect, GNO3•dir, is found to be (3.4 ± 0.1) × 10-7 mol·J-1, irrespective of the concentration and temperature. On longer time scales, >1 ns, an additional contribution to NO3• formation from the reaction between •OH radicals and undissociated HNO3 is observed. The rate constant of this reaction, which is activation-controlled, was determined to be (5.3 ± 0.2) × 107 M-1·s-1 for 22.5 °C, reaching a value of (1.1 ± 0.2) × 108 M-1·s-1 at 80 °C.
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Affiliation(s)
- Raluca Musat
- Laboratoire de Chimie Physique, CNRS/Université Paris-Sud , Bâtiment 349, Orsay 91405, France
| | - Sergey A Denisov
- Laboratoire de Chimie Physique, CNRS/Université Paris-Sud , Bâtiment 349, Orsay 91405, France
| | - Jean-Louis Marignier
- Laboratoire de Chimie Physique, CNRS/Université Paris-Sud , Bâtiment 349, Orsay 91405, France
| | - Mehran Mostafavi
- Laboratoire de Chimie Physique, CNRS/Université Paris-Sud , Bâtiment 349, Orsay 91405, France
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9
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Levanov AV, Isaikina OY, Lunin VV. Dissociation constant of nitric acid. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2017. [DOI: 10.1134/s0036024417070196] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Garaix G, Horne GP, Venault L, Moisy P, Pimblott SM, Marignier JL, Mostafavi M. Decay Mechanism of NO3(•) Radical in Highly Concentrated Nitrate and Nitric Acidic Solutions in the Absence and Presence of Hydrazine. J Phys Chem B 2016; 120:5008-14. [PMID: 27171587 DOI: 10.1021/acs.jpcb.6b02915] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The decay mechanism of NO3(•) has been determined through a combination of experiment and calculation for 7 mol dm(-3) solutions of deaerated aqueous LiNO3 and HNO3, in the absence and presence of hydrazine (N2H4, N2H5(+), and N2H6(2+)). In the absence of hydrazine, the predominant NO3(•) decay pathways are strongly dependent upon the pH of the solution. For neat, neutral pH LiNO3 solutions (7 mol dm(-3)), NO3(•) produced by the pulse is fully consumed within 160 μs by OH(•) (37%), H2O (29%), NO2(-) (17%), and NO2 (17%). For acidic HNO3 solutions (7 mol dm(-3)), radiolytically produced NO3(•) is predominantly consumed within 1 ms by HNO2 (15%) and NO2 (80%). Intervening formulations exhibit the mechanistic transition from neat LiNO3 to neat HNO3. In highly acidic nitric acid solution, hydrazine exists mainly as N2H5(+) and N2H6(2+), both of which rapidly consume NO3(•) in addition to other decay mechanisms, with rate constants of 2.9 (±0.9) × 10(7) and 1.3 (±0.3) × 10(6) dm(3) mol(-1) s(-1), respectively.
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Affiliation(s)
- Guillaume Garaix
- French Alternative Energies and Atomic Energy Commission, CEA , Nuclear Energy Division, Radiochemistry & Processes Department, DRCP, BP 17171, F-30207 Bagnols sur Cèze, France
| | - Gregory P Horne
- Laboratoire de Chimie Physique, CNRS/Université Paris-Sud , Bâtiment 349, 91405 Orsay, France.,The University of Manchester Dalton Cumbrian Facility , Westlakes Science and Technology Park, Moor Row, Cumbria, CA24 3HA, United Kingdom.,School of Chemistry, The University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Laurent Venault
- French Alternative Energies and Atomic Energy Commission, CEA , Nuclear Energy Division, Radiochemistry & Processes Department, DRCP, BP 17171, F-30207 Bagnols sur Cèze, France
| | - Philippe Moisy
- French Alternative Energies and Atomic Energy Commission, CEA , Nuclear Energy Division, Radiochemistry & Processes Department, DRCP, BP 17171, F-30207 Bagnols sur Cèze, France
| | - Simon M Pimblott
- The University of Manchester Dalton Cumbrian Facility , Westlakes Science and Technology Park, Moor Row, Cumbria, CA24 3HA, United Kingdom.,School of Chemistry, The University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Jean Louis Marignier
- Laboratoire de Chimie Physique, CNRS/Université Paris-Sud , Bâtiment 349, 91405 Orsay, France
| | - Mehran Mostafavi
- Laboratoire de Chimie Physique, CNRS/Université Paris-Sud , Bâtiment 349, 91405 Orsay, France
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11
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Gomes Rodrigues D, Dacheux N, Pellet-Rostaing S, Faur C, Bouyer D, Monge S. The first report on phosphonate-based homopolymers combining both chelating and thermosensitive properties of gadolinium: synthesis and evaluation. Polym Chem 2015. [DOI: 10.1039/c5py00785b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Original thermoresponsive poly(acrylamide) bearing valuable carbamoylmethylphosphonate moieties was prepared for gadolinium sorption.
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Affiliation(s)
- Donatien Gomes Rodrigues
- Institut Charles Gerhardt Montpellier UMR5253 CNRS-UM-ENSCM – Equipe Ingénierie et Architectures Macromoléculaires
- Université de Montpellier
- 34095 Montpellier Cedex 5
- France
- Institut de Chimie Séparative de Marcoule UMR 5257 CEA-CNRS-UM-ENSCM – Laboratoire des Interfaces des Matériaux en Evolution
| | - Nicolas Dacheux
- Institut de Chimie Séparative de Marcoule UMR 5257 CEA-CNRS-UM-ENSCM – Laboratoire des Interfaces des Matériaux en Evolution
- 30207 Bagnols sur Cèze Cedex
- France
| | - Stéphane Pellet-Rostaing
- Institut de Chimie Séparative de Marcoule UMR 5257 CEA-CNRS-UM-ENSCM – Laboratoire du Tri-ionique par des Systèmes Moléculaires auto-assemblés
- 30207 Bagnols sur Cèze Cedex
- France
| | - Catherine Faur
- Institut Européen des Membranes UMR 5635 CNRS-ENSCM-UM – Département Génie des Procédés Membranaires
- Université de Montpellier
- 34095 Montpellier, Cedex 5
- France
| | - Denis Bouyer
- Institut Européen des Membranes UMR 5635 CNRS-ENSCM-UM – Département Génie des Procédés Membranaires
- Université de Montpellier
- 34095 Montpellier, Cedex 5
- France
| | - Sophie Monge
- Institut Charles Gerhardt Montpellier UMR5253 CNRS-UM-ENSCM – Equipe Ingénierie et Architectures Macromoléculaires
- Université de Montpellier
- 34095 Montpellier Cedex 5
- France
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12
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Garaix G, Venault L, Costagliola A, Maurin J, Guigue M, Omnee R, Blain G, Vandenborre J, Fattahi M, Vigier N, Moisy P. Alpha radiolysis of nitric acid and sodium nitrate with 4He2+ beam of 13.5MeV energy. Radiat Phys Chem Oxf Engl 1993 2015. [DOI: 10.1016/j.radphyschem.2014.08.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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13
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Ancian B, Bernard O, Chevalet J, Dahirel V, Devilliers D, Dubois E, Dufrêche JF, Durand-Vidal S, Groult H, Jardat M, Lantelme F, Malikova N, Marry V, Mériguet G, Perzynski R, Rollet AL, Rotenberg B, Salanne M, Simon C. Pierre Turq, an inspirational scientist in charge and at interfaces. Mol Phys 2014. [DOI: 10.1080/00268976.2014.885094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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14
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Frey M, Didzoleit H, Gainaru C, Böhmer R. Dynamics in Glass Forming Sulfuric and Nitric Acid Hydrates. J Phys Chem B 2013; 117:12164-74. [DOI: 10.1021/jp407588j] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- M Frey
- Fakultät für Physik, Technische Universität Dortmund , 44221 Dortmund, Germany
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