1
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Zarubin M, Andreev E, Kravchenko E, Pinaeva U, Nechaev A, Apel P. Developing tardigrade-inspired material: Track membranes functionalized with Dsup protein for cell-free DNA isolation. Biotechnol Prog 2024:e3478. [PMID: 38699905 DOI: 10.1002/btpr.3478] [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: 11/29/2023] [Revised: 04/09/2024] [Accepted: 04/24/2024] [Indexed: 05/05/2024]
Abstract
When developing functionalized biomaterials, the proteins from extremophilic organisms, in particular unique tardigrade disordered proteins, are of great value. The damage suppressor protein (Dsup), initially discovered in the tardigrade Ramazzottius varieornatus and found to be an efficient DNA protector under oxidative and irradiation stress, has been hypothesized to possess a good potential for the development of the material, which can isolate cell-free DNA. With this in mind, DNA-nonadsorbing polyethylene terephthalate track membranes have been functionalized using the Dsup protein via covalent bonding with glutaraldehyde. The filtration experiments have verified the ability of track membranes with the immobilized Dsup protein to adsorb cell-free DNA, with an accumulation capacity of 70 ± 19 mg m-2. The resulting track membrane-based biomaterial might be used in various devices for filtration and separation of cell-free DNA molecules from biological solutions and environmental samples, and also for their accumulation, storage, and further manipulation.
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Affiliation(s)
- Mikhail Zarubin
- Dzhelepov Laboratory of Nuclear Problems, International Intergovernmental Organization Joint Institute for Nuclear Research (DLNP JINR), Dubna, Russia
| | - Evgeny Andreev
- Flerov Laboratory of Nuclear Reactions, International Intergovernmental Organization Joint Institute for Nuclear Research (FLNR JINR), Dubna, Russia
| | - Elena Kravchenko
- Dzhelepov Laboratory of Nuclear Problems, International Intergovernmental Organization Joint Institute for Nuclear Research (DLNP JINR), Dubna, Russia
| | - Uliana Pinaeva
- Flerov Laboratory of Nuclear Reactions, International Intergovernmental Organization Joint Institute for Nuclear Research (FLNR JINR), Dubna, Russia
| | - Alexander Nechaev
- Flerov Laboratory of Nuclear Reactions, International Intergovernmental Organization Joint Institute for Nuclear Research (FLNR JINR), Dubna, Russia
| | - Pavel Apel
- Flerov Laboratory of Nuclear Reactions, International Intergovernmental Organization Joint Institute for Nuclear Research (FLNR JINR), Dubna, Russia
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2
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Dischinger S, Miller DJ, Vermaas DA, Kingsbury RS. Unifying the Conversation: Membrane Separation Performance in Energy, Water, and Industrial Applications. ACS ES&T ENGINEERING 2024; 4:277-289. [PMID: 38357245 PMCID: PMC10862477 DOI: 10.1021/acsestengg.3c00475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 12/28/2023] [Accepted: 12/29/2023] [Indexed: 02/16/2024]
Abstract
Dense polymer membranes enable a diverse range of separations and clean energy technologies, including gas separation, water treatment, and renewable fuel production or conversion. The transport of small molecular and ionic solutes in the majority of these membranes is described by the same solution-diffusion mechanism, yet a comparison of membrane separation performance across applications is rare. A better understanding of how structure-property relationships and driving forces compare among applications would drive innovation in membrane development by identifying opportunities for cross-disciplinary knowledge transfer. Here, we aim to inspire such cross-pollination by evaluating the selectivity and electrochemical driving forces for 29 separations across nine different applications using a common framework grounded in the physicochemical characteristics of the permeating and rejected solutes. Our analysis shows that highly selective membranes usually exhibit high solute rejection, rather than fast solute permeation, and often exploit contrasts in the size and charge of solutes rather than a nonelectrostatic chemical property, polarizability. We also highlight the power of selective driving forces (e.g., the fact that applied electric potential acts on charged solutes but not on neutral ones) to enable effective separation processes, even when the membrane itself has poor selectivity. We conclude by proposing several research opportunities that are likely to impact multiple areas of membrane science. The high-level perspective of membrane separation across fields presented herein aims to promote cross-pollination and innovation by enabling comparisons of solute transport and driving forces among membrane separation applications.
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Affiliation(s)
- Sarah
M. Dischinger
- Chemical
Sciences Division, Lawrence Berkeley National
Laboratory, Berkeley, California 94720, United States
| | - Daniel J. Miller
- Chemical
Sciences Division, Lawrence Berkeley National
Laboratory, Berkeley, California 94720, United States
| | - David A. Vermaas
- Department
of Chemical Engineering, Delft University
of Technology, 2629HZ Delft, The
Netherlands
| | - Ryan S. Kingsbury
- Energy
Storage and Distributed Resources Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department
of Civil and Environmental Engineering and the Andlinger Center for
Energy and the Environment, Princeton University, Princeton, New Jersey 08540, United States
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3
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Butylskii D, Troitskiy V, Chuprynina D, Dammak L, Larchet C, Nikonenko V. Application of Hybrid Electrobaromembrane Process for Selective Recovery of Lithium from Cobalt- and Nickel-Containing Leaching Solutions. MEMBRANES 2023; 13:membranes13050509. [PMID: 37233570 DOI: 10.3390/membranes13050509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 04/28/2023] [Accepted: 05/10/2023] [Indexed: 05/27/2023]
Abstract
New processes for recycling valuable materials from used lithium-ion batteries (LIBs) need to be developed. This is critical to both meeting growing global demand and mitigating the electronic waste crisis. In contrast to the use of reagent-based processes, this work shows the results of testing a hybrid electrobaromembrane (EBM) method for the selective separation of Li+ and Co2+ ions. Separation is carried out using a track-etched membrane with a pore diameter of 35 nm, which can create conditions for separation if an electric field and an oppositely directed pressure field are applied simultaneously. It is shown that the efficiency of ion separation for a lithium/cobalt pair can be very high due to the possibility of directing the fluxes of separated ions to opposite sides. The flux of lithium through the membrane is about 0.3 mol/(m2 × h). The presence of coexisting nickel ions in the feed solution does not affect the flux of lithium. It is shown that the EBM separation conditions can be chosen so that only lithium is extracted from the feed solution, while cobalt and nickel remain in it.
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Affiliation(s)
- Dmitrii Butylskii
- Membrane Institute, Kuban State University, 149 Stavropolskaya St., 350040 Krasnodar, Russia
| | - Vasiliy Troitskiy
- Membrane Institute, Kuban State University, 149 Stavropolskaya St., 350040 Krasnodar, Russia
| | - Daria Chuprynina
- Department of Analytical Chemistry, Kuban State University, 149 Stavropolskaya St., 350040 Krasnodar, Russia
| | - Lasâad Dammak
- CNRS, ICMPE, UMR 7182, Université Paris-Est Créteil, 2 Rue Henri Dunant, 94320 Thiais, France
| | - Christian Larchet
- CNRS, ICMPE, UMR 7182, Université Paris-Est Créteil, 2 Rue Henri Dunant, 94320 Thiais, France
| | - Victor Nikonenko
- Membrane Institute, Kuban State University, 149 Stavropolskaya St., 350040 Krasnodar, Russia
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4
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Kozmai AE, Mareev SA, Butylskii DY, Ruleva VD, Pismenskaya ND, Nikonenko VV. Low-frequency impedance of ion-exchange membrane with electrically heterogeneous surface. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.142285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
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5
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Butylskii D, Troitskiy V, Chuprynina D, Kharchenko I, Ryzhkov I, Apel P, Pismenskaya N, Nikonenko V. Selective Separation of Singly Charged Chloride and Dihydrogen Phosphate Anions by Electrobaromembrane Method with Nanoporous Membranes. MEMBRANES 2023; 13:membranes13050455. [PMID: 37233516 DOI: 10.3390/membranes13050455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 04/18/2023] [Accepted: 04/20/2023] [Indexed: 05/27/2023]
Abstract
The entrance of even a small amount of phosphorus compounds into natural waters leads to global problems that require the use of modern purification technologies. This paper presents the results of testing a hybrid electrobaromembrane (EBM) method for the selective separation of Cl- (always present in phosphorus-containing waters) and H2PO4- anions. Separated ions of the same charge sign move in an electric field through the pores of a nanoporous membrane to the corresponding electrode, while a commensurate counter-convective flow in the pores is created by a pressure drop across the membrane. It has been shown that EBM technology provides high fluxes of ions being separated across the membrane as well as a high selectivity coefficient compared to other membrane methods. During the processing of solution containing 0.05 M NaCl and 0.05 M NaH2PO4, the flux of phosphates through a track-etched membrane can reach 0.29 mol/(m2×h). Another possibility for separation is the EBM extraction of chlorides from the solution. Its flux can reach 0.40 mol/(m2×h) through the track-etched membrane and 0.33 mol/(m2×h) through a porous aluminum membrane. The separation efficiency can be very high by using both the porous anodic alumina membrane with positive fixed charges and the track-etched membrane with negative fixed charges due to the possibility of directing the fluxes of separated ions in opposite sides.
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Affiliation(s)
- Dmitrii Butylskii
- Membrane Institute, Kuban State University, 149 Stavropolskaya St., 350040 Krasnodar, Russia
| | - Vasiliy Troitskiy
- Membrane Institute, Kuban State University, 149 Stavropolskaya St., 350040 Krasnodar, Russia
| | - Daria Chuprynina
- Department of Analytical Chemistry, Kuban State University, 149 Stavropolskaya St., 350040 Krasnodar, Russia
| | - Ivan Kharchenko
- Institute of Computational Modeling SB RAS, 50-44 Akademgorodok, 660036 Krasnoyarsk, Russia
| | - Ilya Ryzhkov
- Institute of Computational Modeling SB RAS, 50-44 Akademgorodok, 660036 Krasnoyarsk, Russia
- Siberian Federal University, 79 Svobodny, 660041 Krasnoyarsk, Russia
| | - Pavel Apel
- Joint Institute for Nuclear Research, 6 Joliot-Curie St., 141980 Dubna, Russia
| | - Natalia Pismenskaya
- Membrane Institute, Kuban State University, 149 Stavropolskaya St., 350040 Krasnodar, Russia
| | - Victor Nikonenko
- Membrane Institute, Kuban State University, 149 Stavropolskaya St., 350040 Krasnodar, Russia
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Nichka VS, Mareev SA, Apel PY, Sabbatovskiy KG, Sobolev VD, Nikonenko VV. Modeling the Conductivity and Diffusion Permeability of a Track-Etched Membrane Taking into Account a Loose Layer. MEMBRANES 2022; 12:1283. [PMID: 36557191 PMCID: PMC9786269 DOI: 10.3390/membranes12121283] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/13/2022] [Accepted: 12/15/2022] [Indexed: 05/31/2023]
Abstract
The microheterogeneous model makes it possible to describe the main transport properties of ion-exchange membranes using a single set of input parameters. This paper describes an adaptation of the microheterogeneous model for describing the electrical conductivity and diffusion permeability of a track-etched membrane (TEM). Usually, the transport parameters of TEMs are evaluated assuming that ion transfer occurs through the solution filling the membrane pores, which are cylindrical and oriented normally to the membrane surface. The version of the microheterogeneous model developed in this paper takes into account the presence of a loose layer, which forms as an intermediate layer between the pore solution and the membrane bulk material during track etching. It is assumed that this layer can be considered as a "gel phase" in the framework of the microheterogeneous model due to the fixed hydroxyl and carboxyl groups, which imparts ion exchange properties to the loose layer. The qualitative and quantitative agreement between the calculated and experimental concentration dependencies of the conductivity and diffusion permeability is discussed. The role of the model input parameters is described in relation to the structural features of the membrane. In particular, the inclination of the pores relative to the surface and their narrowing in the middle part of the membrane can be important for their properties.
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Affiliation(s)
- Vladlen S. Nichka
- Physical Chemistry Department, Membrane Institute, Kuban State University, Krasnodar 350040, Russia
| | - Semyon A. Mareev
- Physical Chemistry Department, Membrane Institute, Kuban State University, Krasnodar 350040, Russia
| | - Pavel Yu. Apel
- Joint Institute for Nuclear Research, Dubna 141980, Russia
| | - Konstantin G. Sabbatovskiy
- Frumkin Institute of Physical Chemistry and Electrochemistry Russian Academy of Sciences, Moscow 119071, Russia
| | - Vladimir D. Sobolev
- Frumkin Institute of Physical Chemistry and Electrochemistry Russian Academy of Sciences, Moscow 119071, Russia
| | - Victor V. Nikonenko
- Physical Chemistry Department, Membrane Institute, Kuban State University, Krasnodar 350040, Russia
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7
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Golubenko DV, Yurova PA, Desyatov AV, Stenina IA, Kosarev SA, Yaroslavtsev AB. Pore Filled Ion-Conducting Materials Based on Track-Etched Membranes and Sulfonated Polystyrene. MEMBRANES AND MEMBRANE TECHNOLOGIES 2022. [DOI: 10.1134/s2517751622060026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Abstract
Synthesis of proton-conducting materials based on track-etched membranes from polyvinylidene fluoride and sulfonated cross-linked polystyrene is described. The synthesis has been carried out by filling the pores of the original or gamma-irradiated track-etched membrane by copolymerization of styrene/divinylbenzene followed by sulfonation of polystyrene with chlorosulfonic acid. The resulting membranes have been studied by scanning electron microscopy and ATR IR spectroscopy. Membrane ionic conductivity, hydrogen gas permeability, ion-exchange capacity, and water absorption were measured. The ionic conductivity at 30°C reaches 51.7 mS/cm, which is almost three times higher than for Nafion®212 membranes; however, the gas permeability of the obtained materials also increases simultaneously.
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8
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Apel PY, Blonskaya I, Ivanov O, Kristavchuk O, Nechaev A, Olejniczak K, Orelovich O, Polezhaeva O, Dmitriev S. Do the soft-etched and UV-track membranes actually have uniform cylindrical subnanometer channels? Radiat Phys Chem Oxf Engl 1993 2022. [DOI: 10.1016/j.radphyschem.2022.110266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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9
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Tang C, Yaroshchuk A, Bruening ML. Ion Separations Based on Spontaneously Arising Streaming Potentials in Rotating Isoporous Membranes. MEMBRANES 2022; 12:membranes12060631. [PMID: 35736338 PMCID: PMC9227078 DOI: 10.3390/membranes12060631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 06/10/2022] [Accepted: 06/13/2022] [Indexed: 11/23/2022]
Abstract
Highly selective ion separations are vital for producing pure salts, and membrane-based separations are promising alternatives to conventional ion-separation techniques. Our previous work demonstrated that simple pressure-driven flow through negatively charged isoporous membranes can separate Li+ and K+ with selectivities as high as 70 in dilute solutions. The separation mechanism relies on spontaneously arising streaming potentials that induce electromigration, which opposes advection and separates cations based on differences in their electrophoretic mobilities. Although the separation technique is simple, this work shows that high selectivities are possible only with careful consideration of experimental conditions including transmembrane pressure, solution ionic strength, the K+/Li+ ratio in the feed, and the extent of concentration polarization. Separations conducted with a rotating membrane show Li+/K+ selectivities as high as 150 with a 1000 rpm membrane rotation rate, but the selectivity decreases to 1.3 at 95 rpm. These results demonstrate the benefits and necessity of quantitative control of concentration polarization in highly selective separations. Increases in solution ionic strength or the K+/Li+ feed ratio can also decrease selectivities more than an order of magnitude.
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Affiliation(s)
- Chao Tang
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46656, USA;
| | - Andriy Yaroshchuk
- ICREA, pg.L.Companys 23, 08010 Barcelona, Spain;
- Polytechnic University of Catalonia, Av. Diagonal 647, 08028 Barcelona, Spain
| | - Merlin L. Bruening
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46656, USA;
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
- Correspondence:
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10
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Control of Electrolyte Filtration through a Charged Porous Layer (Membrane) Using a Combination of Pressure Drop and an External Electric Field. COLLOIDS AND INTERFACES 2022. [DOI: 10.3390/colloids6020034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A novel method is proposed for calculating the solvent flux density and electric current density in the process of flow of an electrolyte solution through a charged porous layer (membrane) under the simultaneous action of external pressure and electric potential gradients. The method is based on irreversible thermodynamics and the cell model of an ion-exchange membrane. It is shown that, with the increase in the electrolyte concentration, the total permeability of the porous structure also increases as a result of both barofiltration and electroosmotic transfer of the solvent when both external gradients are co-directional vectors. As for the current density, it also increases with the increasing electrolyte concentration owing to the growth of the streaming current and specific conductivity.
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11
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Abrao-Nemeir I, Zaki O, Meyer N, Lepoitevin M, Torrent J, Janot JM, Balme S. Combining ionic diode, resistive pulse and membrane for detection and separation of anti-CD44 antibody. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.120391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Ounissi T, Belhadj Ammar R, Larchet C, Chaabane L, Baklouti L, Dammak L, Selmane Bel Hadj Hmida E. Lithium-Sodium Separation by a Lithium Composite Membrane Used in Electrodialysis Process: Concept Validation. MEMBRANES 2022; 12:membranes12020244. [PMID: 35207165 PMCID: PMC8876473 DOI: 10.3390/membranes12020244] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 02/06/2022] [Accepted: 02/15/2022] [Indexed: 02/04/2023]
Abstract
The recent expansion of global Lithium Ion Battery (LIBs) production has generated a significant stress on the lithium demand. One of the means to produce this element is its extraction from different aqueous sources (salars, geothermal water etc.). However, the presence of other mono- and divalent cations makes this extraction relatively complex. Herein, we propose lithium-sodium separation by an electrodialysis (ED) process using a Lithium Composite Membrane (LCM), whose effectiveness was previously demonstrated by a Diffusion Dialysis process (previous work). LCM performances in terms of lithium Recovery Ratio (RR(Li+)) and Selectivity (S(Li/Na)) were investigated using different Li+/Na+ reconstituted solutions and two ED cells: a two-compartment cell was chosen for its simplicity, and a four-compartment one was selected for its potential to isolate the redox reactions at the electrodes. We demonstrated that the four-compartment cell use was advantageous since it provided membrane protection from protons and gases generated by the electrodes but that membrane selectivity was negatively affected. The impact of the applied current density and the concentration ratio of Na+ and Li+ in the feed compartment ([Na+]F/[Li+]F) were tested using the four-compartment cell. We showed that increasing the current density led to an improvement of RR(Li+) but to a reduction in the LCM selectivity towards Li+. Increasing the [Na+]F/[Li+]F ratios to 10 had a positive effect on the membrane performance. However, for high values of this ratio, both RR(Li+) and S(Li/Na) decreased. The optimal results were obtained at [Na+]F/[Li+]F near 10, where we succeeded in extracting more than 10% of the initial Li+ concentration with a selectivity value around 112 after 4 h of ED experiment at 0.5 mA·cm−2. Thus, we can objectively estimate that the concept of this selective extraction of Li+ from a mixture even when concentrated in Na+ using an ED process was validated.
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Affiliation(s)
- Takoua Ounissi
- Laboratoire de Chimie Analytique et d'Électrochimie, Département de Chimie, Faculté des Sciences de Tunis, Campus Universitaire, Tunis 2092, Tunisia
| | - Rihab Belhadj Ammar
- Laboratoire de Chimie Analytique et d'Électrochimie, Département de Chimie, Faculté des Sciences de Tunis, Campus Universitaire, Tunis 2092, Tunisia
- Université Paris-Est Créteil, CNRS, ICMPE, UMR 7182, 2 Rue Henri Dunant, 94320 Thiais, France
| | - Christian Larchet
- Université Paris-Est Créteil, CNRS, ICMPE, UMR 7182, 2 Rue Henri Dunant, 94320 Thiais, France
| | - Lobna Chaabane
- Université Paris-Est Créteil, CNRS, ICMPE, UMR 7182, 2 Rue Henri Dunant, 94320 Thiais, France
| | - Lassaad Baklouti
- Department of Chemistry, College of Sciences and Arts at Ar Rass, Qassim University, Ar Rass 51921, Saudi Arabia
| | - Lasâad Dammak
- Université Paris-Est Créteil, CNRS, ICMPE, UMR 7182, 2 Rue Henri Dunant, 94320 Thiais, France
| | - Emna Selmane Bel Hadj Hmida
- Laboratoire de Chimie Analytique et d'Électrochimie, Département de Chimie, Faculté des Sciences de Tunis, Campus Universitaire, Tunis 2092, Tunisia
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High-Efficiency Separation of Mg 2+/Sr 2+ through a NF Membrane under Electric Field. MEMBRANES 2021; 12:membranes12010057. [PMID: 35054582 PMCID: PMC8781883 DOI: 10.3390/membranes12010057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 12/18/2021] [Accepted: 12/29/2021] [Indexed: 11/16/2022]
Abstract
The efficient separation of Sr2+/Mg2+ through nanofiltration (NF) technology is a great challenge because Sr2+ and Mg2+ ions are congeners with the same valence and chemical properties. In this work, an NF membrane under an electric field (EF) was successfully employed to separate Mg2+ and Sr2+ ions for the first time. The effects of current densities, Mg2+/Sr2+ mass ratios, pH of the feed, and coexisting cations on separation performance were investigated. Dehydration of Sr2+ or Mg2+ ions under EF was proved by molecular dynamics simulation. The results showed that a high-efficient separation of Mg2+/Sr2+ was achieved: Mg2+ removal of above 99% and increase in Sr2+ permeation with increasing EF. A separation factor reached 928 under optimal conditions, far higher than that without EF. The efficient separation of Mg2+/Sr2+ ions was mainly due to rejection of most Mg2+ ions by NF membrane and in situ precipitation of partly permeated Mg2+ ions by OH− generated on the cathode under EF. Meanwhile, preferential dehydration of Sr2+ ions under EF due to lower hydration energy of Sr2+ compared with Mg2+ resulted in an increase of permeation of Sr2+ ions. This work provided a new idea for separation of congener ions with similar valence and chemical properties.
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14
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Bazhenov S, Kristavchuk O, Kostyanaya M, Belogorlov A, Ashimov R, Apel P. Interphase Surface Stability in Liquid-Liquid Membrane Contactors Based on Track-Etched Membranes. MEMBRANES 2021; 11:membranes11120949. [PMID: 34940449 PMCID: PMC8703572 DOI: 10.3390/membranes11120949] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 11/25/2021] [Accepted: 11/26/2021] [Indexed: 11/17/2022]
Abstract
A promising solution for the implementation of extraction processes is liquid–liquid membrane contactors. The transfer of the target component from one immiscible liquid to another is carried out inside membrane pores. For the first time, highly asymmetric track-etched membranes made of polyethylene terephthalate (PET) of the same thickness but with different pore diameters (12.5–19 nm on one side and hundreds of nanometers on the other side) were studied in the liquid–liquid membrane contactor. For analysis of the liquid–liquid interface stability, two systems widely diverging in the interfacial tension value were used: water–pentanol and water–hexadecane. The interface stability was investigated depending on the following process parameters: the porous structure, the location of the asymmetric membrane in the contactor, the velocities of liquids, and the pressure drop between them. It was shown that the stability of the interface increases with decreasing pore size. Furthermore, it is preferable to supply the aqueous phase from the side of the asymmetric membrane with the larger pore size. The asymmetry of the porous structure of the membrane makes it possible to increase the range of pressure drop values between the phases by at least two times (from 5 to 10 kPa), which does not lead to mutual dispersion of the liquids. The liquid–liquid contactor based on the asymmetric track-etched membranes allows for the extraction of impurities from the organic phase into the aqueous phase by using a 1% solution of acetone in hexadecane as an example.
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Affiliation(s)
- Stepan Bazhenov
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 119991 Moscow, Russia; (M.K.); (A.B.); (R.A.)
- Correspondence:
| | - Olga Kristavchuk
- Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, 141980 Dubna, Russia; (O.K.); (P.A.)
| | - Margarita Kostyanaya
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 119991 Moscow, Russia; (M.K.); (A.B.); (R.A.)
| | - Anton Belogorlov
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 119991 Moscow, Russia; (M.K.); (A.B.); (R.A.)
- Molecular Physics Department, National Research Nuclear University Moscow Engineering Physics Institute, 115409 Moscow, Russia
- Research Institute for Graphite-Based Structural Materials “NIIgrafit” (JSC “NIIgrafit”), 111524 Moscow, Russia
| | - Ruslan Ashimov
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 119991 Moscow, Russia; (M.K.); (A.B.); (R.A.)
| | - Pavel Apel
- Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, 141980 Dubna, Russia; (O.K.); (P.A.)
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15
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Tang C, Bondarenko MP, Yaroshchuk A, Bruening ML. Highly selective ion separations based on counter-flow electromigration in nanoporous membranes. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2021.119684] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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