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Rama Swami K, Parvathy N, Jennifer G A, Gardas RL, Varathan E. Elucidation of the extraction of trivalent actinides using the DOHyA-HDEHP system: an experimental and theoretical approach. Phys Chem Chem Phys 2024; 26:13279-13286. [PMID: 38639080 DOI: 10.1039/d4cp01012d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
A combined solvent system composed of an acidic and a neutral extractant is demonstrated as an effective system for the mutual separation of lanthanides and actinides from nitric acid solutions. The geometry and stability of various possible complexes formed under extraction and stripping conditions in a combined solvent system composed of N,N-dioctyl hydroxyacetamide (DOHyA) and bis(2-ethylhexyl)phosphoric acid (HDEHP) in the n-dodecane medium were studied both experimentally and theoretically. Experimental observations of the distribution ratios of Am(III) and Eu(III) in the combined solvent system revealed synergistic extraction of trivalent metal ions at all nitric acid concentrations. Density functional theory (DFT) calculations were employed to understand the geometric and electronic properties of the ligands and their corresponding complexes with Am(III) and Eu(III). The calculated results indicate that the feasibility and behaviour of complex formation in the combined solvent system using different methods are based on the energetic aspects of the formation reactions. The study also reveals the participation of the neutral and acid extractants in the combined solvent system facilitating the separation of Eu(III) and Am(III) from high-level liquid waste.
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Affiliation(s)
- K Rama Swami
- Department of Chemistry, Indian Institute of Technology, Madras, Tamil Nadu, India.
| | - N Parvathy
- Process Radiochemistry Reprocessing Research and Development Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India
| | - Abigail Jennifer G
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603203, Tamil Nadu, India.
| | - Ramesh L Gardas
- Department of Chemistry, Indian Institute of Technology, Madras, Tamil Nadu, India.
| | - Elumalai Varathan
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603203, Tamil Nadu, India.
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Suneesh A, Selvan BR, Ramanathan N. A chemically functionalized hydroxyacetamide anchored polymeric adsorbent for the selective separation of zirconium from acidic aqueous solutions. REACT FUNCT POLYM 2022. [DOI: 10.1016/j.reactfunctpolym.2022.105173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Suneesh A, Selvan BR, Prathibha T, Sriram S, Ramanathan N. Extraction chromatography based separation of zirconium(IV) from simulated high-level liquid waste using N,N-di-octyl-2-hydroxyacetamide impregnated amberlite XAD-7 resin. CHEMICAL ENGINEERING JOURNAL ADVANCES 2021. [DOI: 10.1016/j.ceja.2021.100182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Zhu K, Ren X, Li H, Wei Q. Simultaneous extraction of Ti(IV) and Fe(III) in HCl solution containing multiple metals and the mechanism research. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.117897] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Support loading effects on the performance of an extraction chromatographic resin: Toward improved separation of trivalent lanthanides. Talanta 2021; 222:121541. [PMID: 33167249 DOI: 10.1016/j.talanta.2020.121541] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 08/07/2020] [Accepted: 08/08/2020] [Indexed: 11/20/2022]
Abstract
Changes in the level of impregnation of an Amberchrom CG-71m support with bis(2-ethylhexyl)phosphoric acid (HDEHP) are shown to alter the column efficiency, peak tailing, and metal ion uptake capacity associated with the resulting extraction chromatographic resins. Optimum efficiency and minimum peak tailing are observed at intermediate levels (ca. 20% (w/w)) of support loading. Metal ion uptake capacity is reduced relative to a commercial (loaded to 40% (w/w)) resin under the same conditions, however. The utility of the improved efficiency arising from reduced support loading is illustrated in the separation of selected trivalent lanthanide ions, including Gd(III) and Eu(III), whose resolution is unsatisfactory using commercial extraction chromatographic materials.
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Narayanan P, Swami KR, Prathibha T, Venkatesan K. FTIR spectroscopic investigations on the aggregation behaviour of N,N,N′,N′-tetraoctyldiglycolamide and N,N-dioctylhydroxyacetamide in n-dodecane during the extraction of Nd(III) from nitric acid medium. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113685] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Rama Swami K, Venkatesan KA. Effect of pKa of organophosphorus acidic extractants on the aggregation behavior of diglycolamide in n-dodecane. J Radioanal Nucl Chem 2019. [DOI: 10.1007/s10967-019-06798-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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swami KR, Prathibha T, Venkatesan K. Aggregation and organic phase splitting behavior of a synergic extractant system probed by dynamic light scattering spectroscopy. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111320] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Swami KR, Prathibha T, Venkatesan K, Antony M. Separation of Am(III) from Eu(III) present in 3 M nitric acid medium using completely incinerable binary extractants. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.01.166] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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Bapat DU, Dalvi VH. Molecular Insights into Water Clusters Formed in Tributylphosphate-Di-(2-ethylhexyl)phosphoric Acid Extractant Systems from Experiments and Molecular Dynamics Simulations. J Phys Chem B 2019; 123:1618-1635. [PMID: 30730739 DOI: 10.1021/acs.jpcb.8b10831] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Di-(2-ethylhexyl)phosphoric acid (D2EHPA) and tributylphosphate (TBP) are two of the most studied and researched organophosphorous extractants. D2EHPA is an acidic extractant, offering both hydrogen bond donor and acceptor sites while TBP, a neutral extractant, only offers a single acceptor site per molecule. In spite of this, it is observed that 1 M D2EHPA in dodecane is a poorer extractant for water than 1 M TBP in dodecane. The objective of present work is to look into the molecular interactions that cause such behavior. Experiments were carried out with varying molar ratios of TBP and D2EHPA in the organic dodecane phase. Total extractant concentration was kept constant at 1 M with dodecane as diluent. Water extraction was quantified by measuring the moisture content of the organic phase after equilibration. 1H and 31P NMR spectra of the organic phase samples were recorded to study the change in the chemical environment upon extraction. Small angle X-ray scattering data of water saturated extractant phases were analyzed for the possibility of a reverse micellar aggregate formation. Molecular dynamics simulations could calculate free energies in quantitative agreement with experiments. Experimental and simulation studies showed that aggregation in the organic phase was promoted by the presence of water. This combined approach, of experiments and simulation, has shown that water is indispensable for the formation of ordered aggregates of extractants in nonpolar organic solvents. It is seen that, in the organic phase, around 80% of water's hydrogen bonds are with extractant molecules rather than with itself. The analysis clearly indicates that, rather than forming an aqueous core surrounded by extractant, water acts as a bridge between extractant molecules.
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Affiliation(s)
- Deepak U Bapat
- Department of Chemical Engineering , Institute of Chemical Technology , Mumbai 400019 , India
| | - Vishwanath H Dalvi
- Department of Chemical Engineering , Institute of Chemical Technology , Mumbai 400019 , India
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Nakase M, Kobayashi T, Shiwaku H, Suzuki S, Grimes TS, Mincher BJ, Yaita T. Relationship Between Structure and Coordination Strength of N and N,O-Hybrid Donor Ligands with Trivalent Lanthanides. SOLVENT EXTRACTION AND ION EXCHANGE 2019. [DOI: 10.1080/07366299.2018.1532137] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Masahiko Nakase
- Aqueous Separation and Radiochemistry Department, Idaho National Laboratory, Idaho Falls, Idaho, USA
- Actinide Chemistry Group, Japan Atomic Energy Agency, Hyogo, Japan
| | - Tohru Kobayashi
- Actinide Chemistry Group, Japan Atomic Energy Agency, Hyogo, Japan
| | - Hideaki Shiwaku
- Actinide Chemistry Group, Japan Atomic Energy Agency, Hyogo, Japan
| | - Shinichi Suzuki
- Actinide Chemistry Group, Japan Atomic Energy Agency, Hyogo, Japan
| | - Travis S. Grimes
- Aqueous Separation and Radiochemistry Department, Idaho National Laboratory, Idaho Falls, Idaho, USA
| | - Bruce J. Mincher
- Aqueous Separation and Radiochemistry Department, Idaho National Laboratory, Idaho Falls, Idaho, USA
| | - Tsuyoshi Yaita
- Actinide Chemistry Group, Japan Atomic Energy Agency, Hyogo, Japan
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Potential connections between the interaction and extraction performance of mixed extractant systems: A short review. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.07.097] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Investigations on the complete removal of iron(III) interference on the uranium(VI) extraction from sulfate leach liquor using Alamine 336 in kerosene. RADIOCHIM ACTA 2018. [DOI: 10.1515/ract-2017-2906] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Uranyl sulfate obtained by uranium ore leaching of an industrial sample deposit of Gachin site was used for uranium separation by the solvent extraction technique. The presence of other elements in the sulfate leach liquors has a negative impact on the uranium extraction process using Alamine 336; therefore, the operating costs are increased. In this study, the separation of uranium(VI) and iron(III) by Alamine 336 and kerosene have been examined as an extractant and a diluent, respectively. For this purpose, the effects of operating parameters on the extraction process such as Alamine 336 concentration, modifier concentration, contact time, initial aqueous pH, sulfate ion concentration, temperature, and stripping agents were investigated. Also, the complete removal of iron(III) interference from the sulfate leach liquor before the extraction step has been studied with reducing agents. The equilibrium constants and stoichiometric coefficients for uranium and iron extraction with Alamine 336 in the sulfate leach liquors were calculated. Likewise, the values of the thermodynamic parameters such as Gibbs energy, enthalpy and entropy were determined to prove the exothermic and spontaneous reactions. The mentioned procedure is proposed for the uranium separation from the impurities in the sulfate ores using tertiary amine for production of purified uranium.
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Zhang X, Yuan L, Chai Z, Shi W. Towards understanding the correlation between UO22+ extraction and substitute groups in 2,9-diamide-1,10-phenanthroline. Sci China Chem 2018. [DOI: 10.1007/s11426-018-9227-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Swami KR, Suneesh AS, Kumaresan R, Venkatesan KA, Antony MP. Dynamic Light Scattering and FTIR Spectroscopic Investigations on the Reverse Micelles Produced During the Extraction of Nd(III) and Nitric Acid in Tetra Ethylhexyl Diglycolamide. ChemistrySelect 2017. [DOI: 10.1002/slct.201701465] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kantamani Rama Swami
- Fuel Chemistry Division; Indira Gandhi Centre for Atomic Research; Kalpakkam 603102 India
- Homi Bhaba National Institute; Training School Complex; Mumbai 400094 India
| | - Asokan Sudha Suneesh
- Fuel Chemistry Division; Indira Gandhi Centre for Atomic Research; Kalpakkam 603102 India
| | | | | | - Malpan Pailo Antony
- Fuel Chemistry Division; Indira Gandhi Centre for Atomic Research; Kalpakkam 603102 India
- Homi Bhaba National Institute; Training School Complex; Mumbai 400094 India
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Leoncini A, Huskens J, Verboom W. Ligands for f-element extraction used in the nuclear fuel cycle. Chem Soc Rev 2017; 46:7229-7273. [DOI: 10.1039/c7cs00574a] [Citation(s) in RCA: 215] [Impact Index Per Article: 30.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This review describes the latest advances regarding the development, modification and application of suitable ligands for the liquid–liquid extraction of actinides and lanthanides from nuclear waste.
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Affiliation(s)
- Andrea Leoncini
- Molecular Nanofabrication Group
- MESA+ Institute for Nanotechnology
- University of Twente
- 7500 AE Enschede
- The Netherlands
| | - Jurriaan Huskens
- Molecular Nanofabrication Group
- MESA+ Institute for Nanotechnology
- University of Twente
- 7500 AE Enschede
- The Netherlands
| | - Willem Verboom
- Molecular Nanofabrication Group
- MESA+ Institute for Nanotechnology
- University of Twente
- 7500 AE Enschede
- The Netherlands
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