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Goyal P, Sengupta A, Mohapatra PK. Evaluation of a Phosphinate Functionalized Ionic Liquid for the Separation of Nb and Ta from Nitric Acid Feed Conditions. ACS OMEGA 2023; 8:36506-36520. [PMID: 37810697 PMCID: PMC10552501 DOI: 10.1021/acsomega.3c05487] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 09/04/2023] [Indexed: 10/10/2023]
Abstract
A 'green' single-step separation process, involving a phosphonium phosphinate functionalized ionic liquid (FIL) in C8mim·NTf2, has been developed for highly encouraging improvements in the mutual separation of Nb and Ta with a maximum separation factor of ∼48 at 2 M nitric acid. The separation factor in C4mim·NTf2 was found to be somewhat lower compared to that seen in C8mim·NTf2. In C8mim·NTf2, the extraction proceeded via the neutral NbOF3(R4P+)(R2POO-) and TaOF3(R4P+)(R2POO-) species predominated by a 'solvation' mechanism at 2 M HNO3, where both the cationic and anionic parts of the FIL took part in the metal ion extraction. However, in the case of C4mim·NTf2, the extraction proceeded via a cation exchange mechanism involving the mono-positive species viz. [NbO(R2POO-)2]+IL, [TaO(R2POO-)2]+IL. Only the phosphinate group of the FIL was directly involved in the binding to the metal ion. The charge neutrality was maintained by the exchange of the C4mim+ ion from the ionic liquid phase to the aqueous phase. The processes were spontaneous, exothermic involving outer sphere complexation. The radiolytic stabilities of the C8mim·NTf2-based solvent systems were poorer than those of the solvents based on C4mim·NTf2. Aqueous solutions of EDTA-guanidine carbonate or DTPA-guanidine carbonate showed promising back extraction ability though three contacts of these organic phases were required for more than 99.99% stripping of the metal ion. The reusability of these solvent systems was evaluated. After four consecutive cycles, a maximum of only 8% reduction in the extraction efficiency of Ta was noticed, while for Nb it was less than 4% for Nb.
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Affiliation(s)
- Priya Goyal
- Radiochemistry
Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Arijit Sengupta
- Radiochemistry
Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi
Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - Prasanta Kumar Mohapatra
- Radiochemistry
Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi
Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
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2
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Prusty S, Pradhan S, Mishra S. Analysis of Extraction behavior of Nd (III), Sm (III) and Eu (III) from EDTA solution using [TOA-D2] in kerosene: Thermophysical properties, Process parameters and Extraction mechanism. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02428-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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3
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Ding L, Wang X, Yan Y, Smolenski V, Xu W, Novoselova A, Xue Y, Ma F, Zhang X. Electroextraction of neodymium from LiCl-KCl melt by using binary liquid Ga-Al cathode. J RARE EARTH 2022. [DOI: 10.1016/j.jre.2022.04.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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4
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Liu R, Wu L, Liu H, Zhang Y, Ma J, Jiang C, Duan T. High-Efficiency Photocatalytic Degradation of Tannic Acid Using TiO 2 Heterojunction Catalysts. ACS OMEGA 2021; 6:28538-28547. [PMID: 34746549 PMCID: PMC8567273 DOI: 10.1021/acsomega.1c02500] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 07/08/2021] [Indexed: 06/13/2023]
Abstract
Photocatalysts have been extensively used for hydrogen evolution or organic degradation. In this work, two different heterojunction types of composite photocatalysts, 1T-MoS2@TiO2 with Schottky heterojunction and 2H-MoS2@TiO2 with type-II heterojunction, are synthesized via hydrothermal synthesis. These two composite materials exhibit excellent photocatalytic activity toward the degradation of tannic acid, which is a typical organic in nuclear wastewater. At an optimal loading of 16% 1T-MoS2, the 1T-MoS2@TiO2 shows the highest degradation capacity of 98%, which is 3.2 times higher than that of pure TiO2. The degradation rate of 16% 1T-MoS2@TiO2 is much higher than that of 13% 2H-MoS2@TiO2. The enhanced photocatalytic activity might be attributed to the improved charge transfer according to the mechanism investigation, supported by the X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS) analyses. This work provides new opportunities for constructing highly efficient catalysts for nuclear waste disposal.
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Affiliation(s)
- Ruixi Liu
- School
of Materials Science and Engineering, Sichuan
University of Science and Engineering, Zigong 643000, P. R. China
- National
Co-Innovation Center for Nuclear Waste Disposal and Environmental
Safety, Southwest University of Science
and Technology, Mianyang 621010, P. R. China
- State
Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, P. R. China
| | - Linzhen Wu
- National
Co-Innovation Center for Nuclear Waste Disposal and Environmental
Safety, Southwest University of Science
and Technology, Mianyang 621010, P. R. China
- State
Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, P. R. China
| | - Hao Liu
- National
Co-Innovation Center for Nuclear Waste Disposal and Environmental
Safety, Southwest University of Science
and Technology, Mianyang 621010, P. R. China
- State
Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, P. R. China
| | - Youkui Zhang
- National
Co-Innovation Center for Nuclear Waste Disposal and Environmental
Safety, Southwest University of Science
and Technology, Mianyang 621010, P. R. China
- State
Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, P. R. China
| | - Jianjun Ma
- School
of Materials Science and Engineering, Sichuan
University of Science and Engineering, Zigong 643000, P. R. China
| | - Cairong Jiang
- School
of Materials Science and Engineering, Sichuan
University of Science and Engineering, Zigong 643000, P. R. China
| | - Tao Duan
- National
Co-Innovation Center for Nuclear Waste Disposal and Environmental
Safety, Southwest University of Science
and Technology, Mianyang 621010, P. R. China
- State
Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, P. R. China
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Doust Mohammadi M, Hamzehloo M, Abdullah HY. Experimental Measurement of Physical, Transport, and Optical Properties of Binary Mixtures of N-Hexyl Pyridinium Nitrate [HPy][NO3] Ionic Liquid with Water, Ethanol, and Acetonitrile at 298.15 K and 101 kPa. J SOLUTION CHEM 2021. [DOI: 10.1007/s10953-021-01078-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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7
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Pattanayak P, Parua SP, Patra D, Brandão P, Felix V, Chattopadhyay AP, Chattopadhyay S. Synthesis of uranium complexes incorporating extended azo-imine ligands: Molecular and electronic structure. J INDIAN CHEM SOC 2021. [DOI: 10.1016/j.jics.2021.100049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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8
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Knudtzon MN, Blank DA. Photodetachment and Electron Dynamics in 1-Butyl-1-methyl-pyrrolidinium Dicyanamide. J Phys Chem B 2020; 124:9144-9153. [PMID: 32955885 DOI: 10.1021/acs.jpcb.0c06508] [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 ultrafast transient absorption spectrum of 1-butyl-1-methyl-pyrrolidinium dicyanamide, [Pyr1,4+][DCA-], was measured in the visible and near-infrared (IR) spectral regions. Excitation of the liquid at 4.6 eV created initially delocalized and highly reactive electrons that either geminately recombined (69%) or localized onto a cavity with a time constant of ∼300 fs. Electron localization was reflected in the evolution of the TA spectrum and the time-dependent loss of reactivity with a dichloromethane quencher. The delocalized initial state and spectrum of the free electrons were consistent with computational predictions by Xu and Margulis [ J. Phys. Chem. B, 2015, 119, 532-542] on excess electrons in [Pyr1,4+][DCA-]. The computational study considered two possible localization mechanisms for excess electrons, localization on ions, and localization on cavities. In the case of photogenerated electron-hole pairs, the results presented here demonstrate localization to cavities as the dominant channel. Following localization onto a cavity, the free electrons underwent solvation and loss of reactivity with the quencher with rates that slowed in time. The dynamics were similar to an analogous prior study on the related liquid [Pyr1,x+][NTf2-]. One significant difference was the larger yield of free electrons from photoexcitation of [Pyr1,4+][DCA-]. This was found to primarily reflect more efficient localization onto cavities rather than a slower geminate recombination rate.
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Affiliation(s)
- Meghan N Knudtzon
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - David A Blank
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
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Gupta R, Vats B, Pandey AK, Sharma MK, Sahu P, Yadav AK, Ali SM, Kannan S. Insight into Speciation and Electrochemistry of Uranyl Ions in Deep Eutectic Solvents. J Phys Chem B 2020; 124:181-189. [PMID: 31804081 DOI: 10.1021/acs.jpcb.9b08197] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Understanding the speciation of metal ions in heterogeneous hydrogen-bonded deep eutectic solvents (DES) has immense importance for their wide range of applications in green technology, environmental remediation, and nuclear industry. Unfortunately, the fundamental nature of the interaction between DES and actinide ions is almost completely unknown. In the present work, we outline the speciation, solvation mechanism, and redox chemistry of uranyl ion (UO22+) in DES consisting of choline chloride (ChCl) and urea as the hydrogen-bond donor. Electrochemical and spectroscopic techniques along with molecular dynamics (MD) simulations have provided a microscopic insight into the solvation and speciation of the UO22+ ion in DES and also on associated changes in physical composition of the DES. The hydrogen-bonded structure of DES plays an important role in the redox behavior of the UO22+ ion because of its strong complexation with DES components. X-ray absorption spectroscopy and MD simulations showed strong covalent interactions of uranyl ions with the constituents of DES, which led to rearrangement of the hydrogen-bonding network in it without formation of any clusters or aggregations. This, in turn, stabilizes the most unstable pentavalent uranium (UO2+) in the DES. MD analysis also highlights the fact that the number of H-bonds is reduced in the presence of uranyl nitrate irrespective of the presence of water with respect to pristine reline, which suggests high stability of the formed complexed species. The effect of added water up to 20 v/v % on speciation is insignificant for DES, but the presence of water influences the redox chemistry of UO22+ ions considerably. The fundamental findings of the present work would have far reaching consequences on understanding DES, particularly for application in the field of nuclear fuel reprocessing.
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Affiliation(s)
- Ruma Gupta
- Homi Bhabha National Institute , Anushaktinagar, Mumbai 400 096 , India
| | | | - Ashok K Pandey
- Homi Bhabha National Institute , Anushaktinagar, Mumbai 400 096 , India
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10
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Singh R, Mahandra H, Gupta B. Optimization of a solvent extraction route for the recovery of Mo from petroleum refinery spent catalyst using Cyphos IL 102. SOLVENT EXTRACTION AND ION EXCHANGE 2018. [DOI: 10.1080/07366299.2018.1507797] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Rashmi Singh
- Analytical Lab A-214, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, India
| | - Harshit Mahandra
- Analytical Lab A-214, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, India
| | - Bina Gupta
- Analytical Lab A-214, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, India
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11
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Sarkar S, Singh K, Shenoy K. Axial dispersion and pressure drop for single-phase flow in annular pulsed disc and doughnut columns: A CFD study. PROGRESS IN NUCLEAR ENERGY 2018. [DOI: 10.1016/j.pnucene.2018.03.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Sheshadri SN, Kwong HC, Chidan Kumar CS, Quah CK, Siddaraju BP, Veeraiah MK, Hamid MABA, Warad I. Crystal structure and Hirshfeld surface analysis of a pyridiniminium bromide salt: 1-[2-([1,1'-biphen-yl]-4-yl)-2-oxoeth-yl]-3-methyl-1,4-di-hydro-pyridin-4-iminium bromide. Acta Crystallogr E Crystallogr Commun 2018; 74:752-756. [PMID: 29850106 PMCID: PMC5947502 DOI: 10.1107/s2056989018006217] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 04/23/2018] [Indexed: 12/04/2022]
Abstract
In the cation of the title salt, C20H19N2O+·Br-, the phenyl rings are inclined to one another by 38.38 (8)°, whereas the central phenyl ring and the pyridiniminium ring are almost perpendicular with a dihedral angle of 87.37 (9)°. The N+=C cationic double bond was verified by the shortened bond length of 1.337 (2) Å. In the crystal, the Br- anion is linked to the cation by an N-H⋯Br hydrogen bond. C-H⋯O hydrogen bonds link adjacent pyridiniminium cations into inversion dimers with an R22(18) graph-set motif. These dimers are stacked in a phen-yl-phenyl T-shaped geometry through C-H⋯π inter-actions. A Hirshfeld surface analysis was conducted to verify the contributions of the different inter-molecular inter-actions.
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Affiliation(s)
- S. N. Sheshadri
- Department of Chemistry, GSSS Institute of Engineering & Technology for Women, Mysuru 570 016, Karnataka, India
| | - Huey Chong Kwong
- School of Chemical Sciences, Universiti Sains Malaysia, Penang 11800 USM, Malaysia
| | - C. S. Chidan Kumar
- Department of Engineering Chemistry, Vidya Vikas Institute of Engineering & Technology, Visvesvaraya Technological University, Alanahally, Mysuru 570 028, Karnataka, India
| | - Ching Kheng Quah
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - B. P. Siddaraju
- Department of Chemistry, Cauvery Institute of Technology, Mandya 571 402, Karnataka, India
| | - M. K. Veeraiah
- Department of Chemistry, Sri Siddhartha Institute of Technology, Tumkur 572 105, Karnataka, India
| | | | - Ismail Warad
- Department of Chemistry, Science College, An-Najah National University, PO Box 7, Nablus, West Bank, Palestinian Territories
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13
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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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14
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Effect of microheterogeneity in room temperature ionic liquids on energy and electron transfer processes. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2017.12.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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15
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A comparative study of the cathodic behaviour of EuCl3 in two imidazolium chloride ionic liquids, the 1-butyl-3-methylimidazolium (C4mimCl) and the 1-ethyl-3-methylimidazolium (C2mimCl), on a glassy carbon electrode. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.09.064] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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16
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Recent advances on ionic liquid uses in separation techniques. J Chromatogr A 2017; 1559:2-16. [PMID: 28958758 DOI: 10.1016/j.chroma.2017.09.044] [Citation(s) in RCA: 162] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 09/13/2017] [Accepted: 09/19/2017] [Indexed: 12/12/2022]
Abstract
The molten organic salts with melting point below 100°C, commonly called ionic liquids (ILs) have found numerous uses in separation sciences due to their exceptional properties as non molecular solvents, namely, a negligible vapor pressure, a high thermal stability, and unique solvating properties due to polarity and their ionic character of molten salts. Other properties, such as viscosity, boiling point, water solubility, and electrochemical window, are adjustable playing with which anion is associated with which cation. This review focuses on recent development of the uses of ILs in separation techniques actualizing our 2008 article (same authors, J. Chromatogr. A, 1184 (2008) 6-18) focusing on alkyl methylimidazolium salts. These developments include the use of ILs in nuclear waste reprocessing, highly thermally stable ILs that allowed for the introduction of polar gas chromatography capillary columns able to work at temperature never seen before (passing 300°C), the use of ILs in liquid chromatography and capillary electrophoresis, and the introduction of tailor-made ILs for mass spectrometry detection of trace anions at the few femtogram level. The recently introduced deep eutectic solvents are not exactly ILs, they are related enough so that their properties and uses in countercurrent chromatography are presented.
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17
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Dhungana KB, Wu F, Margulis CJ. Excess Electron and Hole in 1-Benzylpyridinium-Based Ionic Liquids. J Phys Chem B 2017; 121:8809-8816. [DOI: 10.1021/acs.jpcb.7b07499] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kamal B. Dhungana
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Fei Wu
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Claudio J. Margulis
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
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18
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M. Yaman S, Mohamad S, A. Manan NS. How do isomeric ortho, meta and paradicationic ionic liquids impact the production of 5-hydroxymethylfurfural? J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.02.076] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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19
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Gupta NK, Sengupta A, Biswas S. Quaternary ammonium based task specific ionic liquid for the efficient and selective extraction of neptunium. RADIOCHIM ACTA 2017. [DOI: 10.1515/ract-2016-2694] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract:
Liquid–liquid extraction of neptunium from aqueous acidic solution using quaternary ammonium based task specific ionic liquid (TSIL) was investigated. The extraction of Np was predominated by the ‘cation exchange’ mechanism via [NpO2·Hpth]+ species for NpO2
2+, while NpO2
+ was extracted in ionic liquid as [NpO2·H·Hpth]+. The extraction process was thermodynamically spontaneous while kinetically slower. Na2CO3 as strippant showed quantitative back extraction of neptunium ions from TSIL. TSIL showed excellent radiolytic stability upto 500 kGy gamma exposure. Finally, the TSIL was employed for the processing of simulated high level waste solutions revealing high selectivity of TSIL towards neptunium.
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Affiliation(s)
- Nishesh Kumar Gupta
- Department of Chemistry , National Institute of Technology , Rourkela, Odisha , India
| | - Arijit Sengupta
- Radiochemistry Division, Bhabha Atomic Research Centre , Mumbai , India
| | - Sujoy Biswas
- Uranium Extraction Division, Bhabha Atomic Research Centre , Mumbai , India
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Pilar K, Rua A, Suarez SN, Mallia C, Lai S, Jayakody JRP, Hatcher JL, Wishart JF, Greenbaum S. Investigation of dynamics in BMIM TFSA ionic liquid through variable temperature and pressure NMR relaxometry and diffusometry. JOURNAL OF THE ELECTROCHEMICAL SOCIETY 2017; 164:H5189-H5196. [PMID: 30034028 PMCID: PMC6052354 DOI: 10.1149/2.0301708jes] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A comprehensive variable temperature, pressure and frequency multinuclear (1H, 2H, and 19F) magnetic resonance study was undertaken on selectively deuterated 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide (BMIM TFSA) ionic liquid isotopologues. This study builds on our earlier investigation of the effects of increasing alkyl chain length on diffusion and dynamics in imidazolium-based TFSA ionic liquids. Fast field cycling 1H T1 data revealed multiple modes of motion. Through calculation of diffusion coefficient (D) values and activation energies, the low- and high-field regimes were assigned to the translational and reorientation dynamics respectively. Variable-pressure 2H T1 measurements reveal site-dependent interactions in the cation with strengths in the order MD3 > CD3 > CD2, indicating dissimilarities in the electric field gradients along the alkyl chain, with the CD2 sites having the largest gradient. Additionally, the α saturation effect in T1 vs. P was observed for all three sites, suggesting significant reduction of the short-range rapid reorientational dynamics. This reduction was also deduced from the variable pressure 1H T1 data, which showed an approach to saturation for both the methyl and butyl group terminal methyl sites. Pressure-dependent D measurements show independent motions for both cations and anions, with the cations having greater D values over the entire pressure range.
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Affiliation(s)
- Kartik Pilar
- Department of Physics, Hunter College, New York, NY 10065, United States
- CUNY Graduate School, New York, New York 10016, United States
| | - Armando Rua
- Department of Physics, Hunter College, New York, NY 10065, United States
- Department of Physics, Recinto Universitario de Mayagüez, Mayagüez, PR 00681
- CUNY Graduate School, New York, New York 10016, United States
| | - Sophia N Suarez
- Physics Department, Brooklyn College, Brooklyn, NY 11210, United States
- CUNY Graduate School, New York, New York 10016, United States
| | - Christopher Mallia
- Department of Physics, Hunter College, New York, NY 10065, United States
| | - Shen Lai
- Department of Physics, Hunter College, New York, NY 10065, United States
- CUNY Graduate School, New York, New York 10016, United States
| | - J R P Jayakody
- Department of Physics, University of Kelaniya, Kelaniya, Sri Lanka 11600
| | - Jasmine L Hatcher
- Chemistry Division, Brookhaven National Laboratory, Upton, NY 11973, United States
- CUNY Graduate School, New York, New York 10016, United States
| | - James F Wishart
- Chemistry Division, Brookhaven National Laboratory, Upton, NY 11973, United States
| | - Steve Greenbaum
- Department of Physics, Hunter College, New York, NY 10065, United States
- CUNY Graduate School, New York, New York 10016, United States
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21
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Straka M. Toward a Greenish Nuclear Fuel Cycle: Ionic Liquids as Solvents for Spent Nuclear Fuel Reprocessing and Other Decontamination Processes for Contaminated Metal Waste. PHYSICAL SCIENCES REVIEWS 2016. [DOI: 10.1515/psr-2016-0074] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The final disposition of spent nuclear fuel (SNF) is an area that requires innovative solutions. The use of ionic liquids (ILs) has been examined as one means to remediate SNF in a variety of different chemical environments and with different chemical starting materials. The effectiveness of various ILs for SNF reprocessing, as well as the reaction chemistry that occurs in them, is discussed.
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22
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Kwon S, Choi J, Cho S, Lee H, Oh W, Choi SJ. A novel method for separating Cs+ from liquid radioactive waste using ionic liquids and a selective extractant. J Radioanal Nucl Chem 2016. [DOI: 10.1007/s10967-016-5112-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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23
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Zhang A, Chen C, Wang Y, Gao T. Adsorption of cesium and some typical elements on a novel solid-state macroporous silica-calix[4]arene material. SEP SCI TECHNOL 2016. [DOI: 10.1080/01496395.2016.1197250] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Anyun Zhang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, P. R. China
| | - Chunmei Chen
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, P. R. China
| | - Yining Wang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, P. R. China
| | - Tengyang Gao
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, P. R. China
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Rout A, A VK, P AM. Extraction behavior of Am(III) and Eu(III) in 1,3-diketonate based ionic liquid. J Radioanal Nucl Chem 2016. [DOI: 10.1007/s10967-016-4777-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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25
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Buz’ko VY, Chuiko GY, Kushkhov KB. Density functional theory study of UO 2 2+ solvation in 1-butyl-3-methylimidazolium chloride. RUSS J INORG CHEM+ 2016. [DOI: 10.1134/s0036023616030062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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26
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Li C, Wu L, Chen L, Yuan X, Cai Y, Feng W, Liu N, Ren Y, Sengupta A, Murali MS, Mohapatra PK, Tao G, Zeng H, Ding S, Yuan L. Highly efficient extraction of actinides with pillar[5]arene-derived diglycolamides in ionic liquids via a unique mechanism involving competitive host–guest interactions. Dalton Trans 2016; 45:19299-19310. [DOI: 10.1039/c6dt04229e] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel extraction mechanism is described.
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27
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Wanigasekara E, Freiderich JW, Sun XG, Meisner RA, Luo H, Delmau LH, Dai S, Moyer BA. Tandem dissolution of UO3 in amide-based acidic ionic liquid and in situ electrodeposition of UO2 with regeneration of the ionic liquid: a closed cycle. Dalton Trans 2016; 45:10151-4. [DOI: 10.1039/c6dt00873a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A closed cycle is demonstrated for the tandem dissolution and electroreduction of UO3 to UO2 with regeneration of the acidic ionic liquid.
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Affiliation(s)
| | | | - Xiao-Guang Sun
- Chemical Sciences Division
- Oak Ridge National Laboratory
- Oak Ridge
- USA
| | - Roberta A. Meisner
- Materials Science and Technology Division
- Oak Ridge National Laboratory
- Oak Ridge
- USA
| | - Huimin Luo
- Energy and Transportation Science Division
- Oak Ridge National Laboratory
- Oak Ridge
- USA
| | | | - Sheng Dai
- Chemical Sciences Division
- Oak Ridge National Laboratory
- Oak Ridge
- USA
| | - Bruce A. Moyer
- Chemical Sciences Division
- Oak Ridge National Laboratory
- Oak Ridge
- USA
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28
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Predicting the cytotoxicity of ionic liquids using QSAR model based on SMILES optimal descriptors. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.04.049] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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29
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Vander Hoogerstraete T, Blockx J, De Coster H, Binnemans K. Selective Single-Step Separation of a Mixture of Three Metal Ions by a Triphasic Ionic-Liquid-Water-Ionic-Liquid Solvent Extraction System. Chemistry 2015; 21:11757-66. [DOI: 10.1002/chem.201500825] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2015] [Indexed: 11/12/2022]
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30
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Morco RP, Joseph JM, Wren JC. The chemical stability of phosphonium-based ionic liquids under gamma irradiation. RSC Adv 2015. [DOI: 10.1039/c4ra13115k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Photographs of irradiated [P14666][dca] and the corresponding UV-vis and Raman spectra, and conductivities as a function of irradiation time. Black, blue and red lines are for 0, 96 and 192 h of irradiation, respectively.
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Affiliation(s)
- Ryan P. Morco
- Department of Chemistry
- University of Western Ontario
- London
- Canada N6A 5B7
| | - Jiju M. Joseph
- Department of Chemistry
- University of Western Ontario
- London
- Canada N6A 5B7
| | - J. Clara Wren
- Department of Chemistry
- University of Western Ontario
- London
- Canada N6A 5B7
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31
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Ma S, Lv M, Deng F, Zhang X, Zhai H, Lv W. Predicting the ecotoxicity of ionic liquids towards Vibrio fischeri using genetic function approximation and least squares support vector machine. JOURNAL OF HAZARDOUS MATERIALS 2014; 283:591-598. [PMID: 25464300 DOI: 10.1016/j.jhazmat.2014.10.011] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 10/01/2014] [Accepted: 10/10/2014] [Indexed: 06/04/2023]
Abstract
Ionic liquids (ILs) are widely used in industrial production for their unique physicochemical properties, and they are even regarded as green solvents. However, the recent study showed ILs might pose a potential risk to aquatic ecosystems. In the present work, the quantitative structure-activity relationship (QSAR) models, including genetic function approximation (GFA) and least squares support vector machine (LSSVM) were developed for predicting the ecotoxicity of ILs towards the marine bacterium Vibrio fischeri based on the descriptors calculated from cations and anions. Five descriptors were selected by GFA and used to develop the linear model. From the discussion of descriptors, the cation structure was the main factor to the toxicity, which mainly depended on the size, lipophilic, and 3D molecular structure of cations. In order to capture the nonlinear nature, the LSSVM model was also built for more accurately predicting the ecotoxicity. The GFA and LSSVM models were performed the rigorous internal and external validation, further verifying these models with excellent robustness and predictive ability. Therefore, both of models can be used for the prediction of the ecotoxicity of newly synthesized and untested ILs, and can provide reference information and theoretical guidance for designing and synthesizing safer and more eco-friendly ILs.
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Affiliation(s)
- Shuying Ma
- Department of Chemistry, Lanzhou University, Lanzhou 730000, Gansu, People's Republic of China
| | - Min Lv
- Department of Chemistry, Lanzhou University, Lanzhou 730000, Gansu, People's Republic of China
| | - Fangfang Deng
- Department of Chemistry, Lanzhou University, Lanzhou 730000, Gansu, People's Republic of China
| | - Xiaoyun Zhang
- Department of Chemistry, Lanzhou University, Lanzhou 730000, Gansu, People's Republic of China.
| | - Honglin Zhai
- Department of Chemistry, Lanzhou University, Lanzhou 730000, Gansu, People's Republic of China
| | - Wenjuan Lv
- Department of Chemistry, Lanzhou University, Lanzhou 730000, Gansu, People's Republic of China
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32
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Shkrob IA, Marin TW, Wishart JF, Grills DC. Radiation Stability of Cations in Ionic Liquids. 5. Task-Specific Ionic Liquids Consisting of Biocompatible Cations and the Puzzle of Radiation Hypersensitivity. J Phys Chem B 2014; 118:10477-92. [DOI: 10.1021/jp5049716] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ilya A. Shkrob
- Chemical
Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Timothy W. Marin
- Chemical
Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
- Chemistry
Department, Benedictine University, 5700 College Road, Lisle, Illinois 60532, United States
| | - James F. Wishart
- Chemistry
Department, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - David C. Grills
- Chemistry
Department, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
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33
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Electrochemical investigation of the redox couple Sm(III)/Sm(II) on a tungsten electrode in molten LiF–CaF2–SmF3. J Radioanal Nucl Chem 2014. [DOI: 10.1007/s10967-014-3100-7] [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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34
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Chou LH, Hussey CL. An Electrochemical and Spectroscopic Study of Nd(III) and Pr(III) Coordination in the 1-Butyl-1-methylpyrrolidinium Bis(trifluoromethylsulfonyl)imide Ionic Liquid Containing Chloride Ion. Inorg Chem 2014; 53:5750-8. [DOI: 10.1021/ic5005616] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Li-Hsien Chou
- Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United States
| | - Charles L. Hussey
- Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United States
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35
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Sasaki K, Suzuki T, Arai T, Takao K, Suzuki S, Yaita T, Ikeda Y. Uranyl Species in 1-Ethyl-3-methylimidazolium Nitrate ([EMI][NO3]) Solution of [EMI]2[UO2(NO3)4]: First Spectrophotometric Evidence for Existence of [UO2(NO3)4]2−. CHEM LETT 2014. [DOI: 10.1246/cl.131183] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | - Tomoya Suzuki
- Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology
| | | | - Koichiro Takao
- Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology
| | | | | | - Yasuhisa Ikeda
- Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology
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36
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Shkrob IA, Marin TW, Jensen MP. Ionic Liquid Based Separations of Trivalent Lanthanide and Actinide Ions. Ind Eng Chem Res 2014. [DOI: 10.1021/ie4036719] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ilya A. Shkrob
- Chemical
Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Timothy W. Marin
- Chemical
Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
- Chemistry
Department, Benedictine University, 5700 College Road, Lisle, Illinois 60532, United States
| | - Mark P. Jensen
- Chemical
Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
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37
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Shkrob IA, Marin TW, Luo H, Dai S. Radiation Stability of Cations in Ionic Liquids. 1. Alkyl and Benzyl Derivatives of 5-Membered Ring Heterocycles. J Phys Chem B 2013; 117:14372-84. [DOI: 10.1021/jp4082432] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ilya A. Shkrob
- Chemical
Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Timothy W. Marin
- Chemical
Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
- Chemistry
Department, Benedictine University, 5700 College Road, Lisle, Illinois 60532, United States
| | - Huimin Luo
- Energy
and Transportation Science Division, Oak Ridge National Laboratory, Oak
Ridge, Tennessee 37831, United States
| | - Sheng Dai
- Chemical
Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
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38
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Cs+ removal from aqueous solutions through adsorption onto Florisil® impregnated with trihexyl(tetradecyl)phosphonium chloride. Molecules 2013; 18:12845-56. [PMID: 24135940 PMCID: PMC6270301 DOI: 10.3390/molecules181012845] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 10/09/2013] [Accepted: 10/10/2013] [Indexed: 11/16/2022] Open
Abstract
This research determined the adsorption performance of Florisil® impregnated with trihexyl(tetradecyl)phosphonium chloride (Cyphos IL-101) in the process of Cs+ removal from aqueous solutions. The obtained Florisil® impregnated with the studied ionic liquid was characterized through energy dispersive X-ray analysis and Fourier transform infrared spectroscopy in order to verify that the impregnation with the ionic liquid had occurred. The adsorption process has been investigated as a function of pH, solid:liquid ratio, adsorbate concentration, contact time and temperature. The isotherm data was well described by a Langmuir isotherm model. The maximum adsorption capacities of the Florisil® impregnated with the studied ionic liquid was found to be 3.086 mg Cs+/g of adsorbent. The results indicated that the adsorption fitted well with the pseudo-second order kinetic model.
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39
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Refolding of Laccase in Dilution Additive Mode with Copper-Based Ionic Liquid. Appl Biochem Biotechnol 2013; 171:1289-98. [DOI: 10.1007/s12010-013-0422-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Accepted: 08/05/2013] [Indexed: 11/25/2022]
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40
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41
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Pan Y, Hussey CL. Electrochemical and Spectroscopic Investigation of Ln3+ (Ln = Sm, Eu, and Yb) Solvation in Bis(trifluoromethylsulfonyl)imide-Based Ionic Liquids and Coordination by N,N,N′,N′-Tetraoctyl-3-oxa-pentane Diamide (TODGA) and Chloride. Inorg Chem 2013; 52:3241-52. [DOI: 10.1021/ic3027557] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yunfeng Pan
- Department of Chemistry and Biochemistry, The University of Mississippi, University, Mississippi 38677,
United States
| | - Charles L. Hussey
- Department of Chemistry and Biochemistry, The University of Mississippi, University, Mississippi 38677,
United States
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42
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Optimization of lipase-catalyzed synthesis of caffeic acid phenethyl ester in ionic liquids by response surface methodology. Bioprocess Biosyst Eng 2013; 36:799-807. [DOI: 10.1007/s00449-013-0906-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2012] [Accepted: 01/15/2013] [Indexed: 01/07/2023]
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43
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Das RN, Roy K. Advances in QSPR/QSTR models of ionic liquids for the design of greener solvents of the future. Mol Divers 2013; 17:151-96. [DOI: 10.1007/s11030-012-9413-y] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Accepted: 12/03/2012] [Indexed: 01/30/2023]
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44
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Chou LH, Cleland WE, Hussey CL. Electrochemical and Spectroscopic Study of Ce(III) Coordination in the 1-Butyl-3-methylpyrrolidinium Bis(trifluoromethylsulfonyl)imide Ionic Liquid Containing Chloride Ion. Inorg Chem 2012; 51:11450-7. [DOI: 10.1021/ic301172g] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Li-Hsien Chou
- Department of Chemistry and Biochemistry, University of Mississippi, Mississippi
38677, United States
| | - Walter E. Cleland
- Department of Chemistry and Biochemistry, University of Mississippi, Mississippi
38677, United States
| | - Charles L. Hussey
- Department of Chemistry and Biochemistry, University of Mississippi, Mississippi
38677, United States
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45
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Affiliation(s)
- Koichiro Takao
- Department of Materials
and Life Science, Seikei University, 3-3-1 Kichijoji-Kitamachi, Musashino-shi, Tokyo 180-8633, Japan
| | - Thomas James Bell
- Research Laboratory for Nuclear
Reactors, Tokyo Institute of Technology, 2-12-1-N1-34 O-okayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Yasuhisa Ikeda
- Research Laboratory for Nuclear
Reactors, Tokyo Institute of Technology, 2-12-1-N1-34 O-okayama, Meguro-ku, Tokyo 152-8550, Japan
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46
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Electrochemical behavior of [UO2Cl4]2− in 1-ethyl-3-methylimidazolium based ionic liquids. Sci China Chem 2012. [DOI: 10.1007/s11426-012-4693-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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47
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Enhanced refolding of lysozyme with imidazolium-based room temperature ionic liquids: Effect of hydrophobicity and sulfur residue. Sci China Chem 2012. [DOI: 10.1007/s11426-012-4678-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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48
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Shkrob IA, Marin TW, Chemerisov SD, Hatcher J, Wishart JF. Toward Radiation-Resistant Ionic Liquids. Radiation Stability of Sulfonyl Imide Anions. J Phys Chem B 2012; 116:9043-55. [DOI: 10.1021/jp302151c] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ilya A. Shkrob
- Chemical Sciences and Engineering
Division, Argonne National Laboratory,
9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Timothy W. Marin
- Chemical Sciences and Engineering
Division, Argonne National Laboratory,
9700 South Cass Avenue, Argonne, Illinois 60439, United States
- Chemistry Department, Benedictine University, 5700 College Road, Lisle, Illinois
60532, United States
| | - Sergey D. Chemerisov
- Chemical Sciences and Engineering
Division, Argonne National Laboratory,
9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Jasmine Hatcher
- Chemistry
Department, Brookhaven National Laboratory, Upton, New York 11973-5000,
United States
| | - James F. Wishart
- Chemistry
Department, Brookhaven National Laboratory, Upton, New York 11973-5000,
United States
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49
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Asencio RÁ, Cranston ED, Atkin R, Rutland MW. Ionic liquid nanotribology: stiction suppression and surface induced shear thinning. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:9967-9976. [PMID: 22676253 DOI: 10.1021/la3010807] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The friction and adhesion between pairs of materials (silica, alumina, and polytetrafluoroethylene) have been studied and interpreted in terms of the long-ranged interactions present. In ambient laboratory air, the interactions are dominated by van der Waals attraction and strong adhesion leading to significant frictional forces. In the presence of the ionic liquid (IL) ethylammonium nitrate (EAN) the van der Waals interaction is suppressed and the attractive/adhesive interactions which lead to "stiction" are removed, resulting in an at least a 10-fold reduction in the friction force at large applied loads. The friction coefficient for each system was determined; coefficients obtained in air were significantly larger than those obtained in the presence of EAN (which ranged between 0.1 and 0.25), and variation in the friction coefficients between systems was correlated with changes in surface roughness. As the viscosity of ILs can be relatively high, which has implications for the lubricating properties, the hydrodynamic forces between the surfaces have therefore also been studied. The linear increase in repulsive force with speed, expected from hydrodynamic interactions, is clearly observed, and these forces further inhibit the potential for stiction. Remarkably, the viscosity extracted from the data is dramatically reduced compared to the bulk value, indicative of a surface ordering effect which significantly reduces viscous losses.
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Affiliation(s)
- Rubén Álvarez Asencio
- Department of Surface and Corrosion Science, School of Chemical Science and Engineering, The Royal Institute of Technology, Stockholm, Sweden
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50
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Rout A, Venkatesan KA, Srinivasan TG, Vasudeva Rao PR. Liquid-liquid extraction of Pu(IV), U(VI) and Am(III) using malonamide in room temperature ionic liquid as diluent. JOURNAL OF HAZARDOUS MATERIALS 2012; 221-222:62-7. [PMID: 22541638 DOI: 10.1016/j.jhazmat.2012.04.007] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2011] [Revised: 04/03/2012] [Accepted: 04/04/2012] [Indexed: 05/20/2023]
Abstract
The extraction behavior of U(VI), Pu(IV) and Am(III) from nitric acid medium by a solution of N,N-dimethyl-N,N-dioctyl-2-(2-hexyloxyethyl)malonamide (DMDOHEMA) in the room temperature ionic liquid, 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide (C(4)mimNTf(2)), was studied. The distribution ratio of these actinides in DMDOHEMA/C(4)mimNTf(2) was measured as a function of various parameters such as the concentration of nitric acid, DMDOHEMA, NTf(2)(-), alkyl chain length of ionic liquid. The extraction of actinides in the absence of DMDOHEMA was insignificant and the distribution ratio achieved in conjunction with C(4)mimNTf(2), was remarkable. The separation factor of U(VI) and Pu(IV) achieved with the use of DMDOHEMA, ionic liquid was compared with Am(III) and other fission products. The stoichiometry of the metal-solvate was determined to be 1:2 for U(VI) and Pu(IV) and 1:3 for Am(III).
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Affiliation(s)
- Alok Rout
- Fuel Chemistry Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India
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