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Shahgodari S, Labanda J, Llorens J. Experimental and Modeling Study of the Nanofiltration of Alcohol-Based Molecules and Amino Acids by Commercial Membranes. MEMBRANES 2023; 13:631. [PMID: 37504997 PMCID: PMC10384295 DOI: 10.3390/membranes13070631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 06/26/2023] [Accepted: 06/27/2023] [Indexed: 07/29/2023]
Abstract
The nanofiltration performance of three commercial membranes was analyzed by the Steric Pore Model (SPM) and the extended Nernst-Planck diffusion equation inside membrane pores. The model was completed with the equation to predict the concentration polarization, and the mass transfer coefficient was determined by considering the presence of a feed spacer. The model parameters that characterized the performance of the membrane were the hydrodynamic coefficient, which accounts for the possible variations in solute size and membrane pore radius, the effective membrane thickness, and the water permeability coefficient. All experiments were conducted at fixed feed pH of 6. The rejections of uncharged solutes (glucose for membranes with a high molecular weight cut-off (MWCO) and glycerol and ethylene glycol for membranes with a low MWCO) allowed the model parameters to be determined. We found that glycerol and ethylene glycol overestimate the membrane pore radius due to their ability to interact with the membrane matrix. Therefore, the rejection of glycine as a small amino acid was explored to characterize the membranes with low MWCO since these molecules do not interact with the membrane matrix and have an almost zero charge at pH values between 4.5 and 6.5. Based on the experimental rejections, it was stated that glucose and glycine could be separated by these membranes operating in continuous diafiltration mode.
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Affiliation(s)
- Shirin Shahgodari
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain
| | - Jordi Labanda
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain
| | - Joan Llorens
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain
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2
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Labanda J, Shahgodari S, Llorens J. Influence of pH and NaCl on the rejection of glycine and triglycine in binary solutions for desalination with diananofiltration. Heliyon 2023; 9:e16797. [PMID: 37313174 PMCID: PMC10258429 DOI: 10.1016/j.heliyon.2023.e16797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 05/16/2023] [Accepted: 05/29/2023] [Indexed: 06/15/2023] Open
Abstract
Nanofiltration can be used as the last step in the purification of the biomolecules that are present in many industrial by-products, such as biological protein hydrolysates. The present study explored the variation in glycine and triglycine rejections in binary solutions with NaCl at different feed pHs with two nanofiltration membranes: MPF-36 and Desal 5DK with molecular weight cut-offs of 1000 and 200 g mol-1, respectively. First, water permeability coefficient showed a n-shaped curve with feed pH, which was more evident for the MPF-36 membrane. Second, membrane performance with single solutions was studied and the experimental data were fitted with the Donnan steric pore model with dielectric exclusion (DSPM-DE) to explain the variations of solute rejection with feed pHs. Glucose rejection was assessed to estimate the membrane pore radius of the MPF-36 membrane, and a pH dependence was observed. For a tight membrane (Desal 5DK), glucose rejection was close to unity and the membrane pore radius was estimated from the glycine rejection in the feed pH range from 3.7 to 8.4. Glycine and triglycine rejections showed a pH-dependence with a u-shaped curve, even for the zwitterion species. In binary solutions, glycine and triglycine rejections decreased with NaCl concentration, especially in the MPF-36 membrane. Triglycine rejection was always higher than NaCl rejection and it was estimated that triglycine can be desalted using a continuous diananofiltration the Desal 5DK membrane.
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3
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Religa P, Kaźmierczak B. Mechanism of Chromium Separation and Concentration from Tannery Wastewater by Membrane Methods. MEMBRANES 2023; 13:295. [PMID: 36984682 PMCID: PMC10058498 DOI: 10.3390/membranes13030295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 02/22/2023] [Accepted: 02/24/2023] [Indexed: 06/18/2023]
Abstract
The article specifies conditions for a nanofiltration process employing a diafiltration method with a constant volume diafiltration (NF-CVD) for exhausted chromium tannery wastewater treatment and describes a mechanism of the examined process carried out for model wastewater. The authors prove that a decrease in salt concentration in the NF-CVD process is an important factor that enables effective concentration of chromium. Based on the proposed chromium separation and concentration mechanisms, it was found that this effect may be achieved by (1) limiting the formation of an ionic adsorption-polarization layer and (2) reducing the increase in the osmotic pressure caused by a change in the separation properties of the membrane. The article shows that in the analyzed system a higher amount of the solvent introduced at the diafiltration stage and a lower process pressure that ensures a reduction in salt retention translate to a high level of salt removal. In regenerates, after the NF-CVD processes in which at least the same volume of a washing diluent as the volume of the retentate after the pre-concentration step was used, salt concentration below 10 g L-1 and chromium concentration about three times higher than in the case of the feed solution were obtained. Therefore, the proposed solution implements the circular economy strategy in the tannery.
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Affiliation(s)
- Paweł Religa
- Faculty of Chemical Engineering and Commodity Science, Kazimierz Pulaski University of Technology and Humanities in Radom, Chrobrego 27, 26-600 Radom, Poland
| | - Bernadetta Kaźmierczak
- Bioeconomy and Ecoinnovation Centre, Proecological Technologies Research Group, Łukasiewicz Research Network, Institute for Sustainable Technologies, Pulaskiego 6/10, 26-600 Radom, Poland
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4
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Wang Z, Xu C, Fu Q, Nair S. Transport Properties of Graphene Oxide Nanofiltration Membranes: Electrokinetic Modeling and Experimental Validation. AIChE J 2022. [DOI: 10.1002/aic.17865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Zhongzhen Wang
- School of Chemical & Biomolecular Engineering Georgia Institute of Technology Atlanta GA USA
- Renewable Bioproducts Institute Georgia Institute of Technology Atlanta GA USA
| | - Chunyan Xu
- School of Civil and Environmental Engineering Georgia Institute of Technology Atlanta GA USA
| | - Qiang Fu
- School of Chemical & Biomolecular Engineering Georgia Institute of Technology Atlanta GA USA
- Renewable Bioproducts Institute Georgia Institute of Technology Atlanta GA USA
| | - Sankar Nair
- School of Chemical & Biomolecular Engineering Georgia Institute of Technology Atlanta GA USA
- Renewable Bioproducts Institute Georgia Institute of Technology Atlanta GA USA
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5
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Reverse osmosis and nanofiltration opportunities to concentrate multicomponent mixtures of volatile fatty acids. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.120840] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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6
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7
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Wang L, Cao T, Dykstra JE, Porada S, Biesheuvel PM, Elimelech M. Salt and Water Transport in Reverse Osmosis Membranes: Beyond the Solution-Diffusion Model. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:16665-16675. [PMID: 34879196 DOI: 10.1021/acs.est.1c05649] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Understanding the salt-water separation mechanisms of reverse osmosis (RO) membranes is critical for the further development and optimization of RO technology. The solution-diffusion (SD) model is widely used to describe water and salt transport in RO, but it does not describe the intricate transport mechanisms of water molecules and ions through the membrane. In this study, we develop an ion transport model for RO, referred to as the solution-friction model, by rigorously considering the mechanisms of partitioning and the interactions among water, salt ions, and the membrane. Ion transport through the membrane is described by the extended Nernst-Planck equation, with the consideration of frictions between the species (i.e., ion, water, and membrane matrix). Water flow through the membrane is governed by the hydraulic pressure gradient and the friction between the water and membrane matrix as well as the friction between water and ions. The model is validated using experimental measurements of salt rejection and permeate water flux in a lab-scale, cross-flow RO setup. We then investigate the effects of feed salt concentration and hydraulic pressure on salt permeability, demonstrating strong dependence of salt permeability on feed salt concentration and applied pressure, starkly disparate from the SD model. Lastly, we develop a framework to analyze the pressure drop distribution across the membrane, demonstrating that cross-membrane transport dominates the overall pressure drop in RO, in marked contrast to the SD model that assumes no pressure drop across the membrane.
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Affiliation(s)
- Li Wang
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States
| | - Tianchi Cao
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States
| | - Jouke E Dykstra
- Environmental Technology, Wageningen University, Bornse Weilanden 9, 6708 WG Wageningen, The Netherlands
| | - Slawomir Porada
- Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911 MA Leeuwarden, The Netherlands
| | - P M Biesheuvel
- Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911 MA Leeuwarden, The Netherlands
| | - Menachem Elimelech
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States
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8
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Influence of multivalent-electrolyte metal solutions on the superficial properties and performance of a polyamide nanofiltration membrane. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118846] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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9
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An improved perm-selectivity prediction of forward osmosis membrane by incorporating the effect of the surface charge on the solute partitioning. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2021.119303] [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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10
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Pore model for nanofiltration: History, theoretical framework, key predictions, limitations, and prospects. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2020.118809] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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11
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12
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Affiliation(s)
- Chao Tang
- Department of Chemical and Biomolecular Engineering University of Notre Dame Notre Dame Indiana USA
| | - Merlin L. Bruening
- Department of Chemical and Biomolecular Engineering University of Notre Dame Notre Dame Indiana USA
- Department of Chemistry and Biochemistry University of Notre Dame Notre Dame Indiana USA
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13
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Sabbatovskii KG, Sergeeva IP, Sobolev VD. The Effect of Aqueous–Ethanol Sodium Chloride Solutions on the Selectivity and Electrosurface Properties of an Acetyl Cellulose Membrane. COLLOID JOURNAL 2020. [DOI: 10.1134/s1061933x19060164] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Andalaft J, Schwarz A, Pino L, Fuentes P, Bórquez R, Aybar M. Assessment and Modeling of Nanofiltration of Acid Mine Drainage. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b03576] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Javier Andalaft
- Department of Civil Engineering, Universidad de Concepción, P.O. Box 160-C, Concepción 4030000, Chile
| | - Alex Schwarz
- Department of Civil Engineering, Universidad de Concepción, P.O. Box 160-C, Concepción 4030000, Chile
- Center for Water Resources in Agriculture and Mining, CRHIAM, P.O. Box 160-C, Concepción 4030000, Chile
| | - Luis Pino
- Department of Chemical Engineering, Universidad de Concepción, P.O. Box 160-C, Concepción 4030000, Chile
| | - Paula Fuentes
- Department of Civil Engineering, Universidad de Concepción, P.O. Box 160-C, Concepción 4030000, Chile
| | - Rodrigo Bórquez
- Department of Chemical Engineering, Universidad de Concepción, P.O. Box 160-C, Concepción 4030000, Chile
- Center for Water Resources in Agriculture and Mining, CRHIAM, P.O. Box 160-C, Concepción 4030000, Chile
| | - Marcelo Aybar
- Department of Civil Engineering, Universidad de Concepción, P.O. Box 160-C, Concepción 4030000, Chile
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15
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Insights into the rejection of barium and strontium by nanofiltration membrane from experimental and modeling analysis. J Memb Sci 2018. [DOI: 10.1016/j.memsci.2018.07.060] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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16
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Werner A, Rieger A, Mosch M, Haseneder R, Repke JU. Nanofiltration of indium and germanium ions in aqueous solutions: Influence of pH and charge on retention and membrane flux. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2017.11.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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Fridman-Bishop N, Tankus KA, Freger V. Permeation mechanism and interplay between ions in nanofiltration. J Memb Sci 2018. [DOI: 10.1016/j.memsci.2017.11.050] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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18
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Breida M, Alami Younssi S, Bouazizi A, Achiou B, Ouammou M, El Rhazi M. Nitrate removal from aqueous solutions by γ-Al 2O 3 ultrafiltration membranes. Heliyon 2018; 4:e00498. [PMID: 29560419 PMCID: PMC5857526 DOI: 10.1016/j.heliyon.2017.e00498] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 12/07/2017] [Accepted: 12/28/2017] [Indexed: 10/25/2022] Open
Abstract
In the framework of understanding the transport mechanism that governs the filtration of NO3- solution through a γ-Al2O3 membrane with a nominal pore size of 5 nm at low ultrafiltration, a series of various types of nitrate solutions and operating conditions were investigated. The effect of filtration parameters such as pH, applied pressure and NO3- concentration on the selectivity and permeability of the membrane were studied using binary solutions (KNO3, NaNO3, Ca(NO3)2 and Mg(NO3)2) and ternary solutions ((NaNO3 + KNO3), (NaNO3 + Ca(NO3)2) and (Mg(NO3)2 + Ca(NO3)2). The experimental filtration results showed that high NO3- rejection was observed when pH was close to the point of zero charge of the membrane for both binary and ternary solutions. NO3- rejection increased with an increase of applied pressure. The rejection gradually decreased when the initial NO3- concentration increased. It appeared that the valency and hydrated radius of associated cation had a dramatic effect on NO3- rejection, with the divalent cations being more rejected than monovalent cations. In order to get to natural water complexity, three different samples of mineral water doped with NO3- from two different sources were studied at optimized operating conditions (25 ppm of NO3- and 6 bar). Experimental results demonstrated that NO3- rejection strongly depended upon the total mineralization and the presence of divalent anions in solution. In addition, the obtained results showed the potential use of γ-Al2O3 ultrafiltration membrane for denitrificatoin of contaminated water especially in Moroccan agricultural areas.
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Affiliation(s)
- M Breida
- Laboratory of Materials, Membranes and Environment, Department of Chemistry, Faculty of Sciences and Technologies of Mohammedia, University Hassan II of Casablanca, BP 146, Mohammedia 20650, Morocco
| | - S Alami Younssi
- Laboratory of Materials, Membranes and Environment, Department of Chemistry, Faculty of Sciences and Technologies of Mohammedia, University Hassan II of Casablanca, BP 146, Mohammedia 20650, Morocco
| | - A Bouazizi
- Laboratory of Materials, Membranes and Environment, Department of Chemistry, Faculty of Sciences and Technologies of Mohammedia, University Hassan II of Casablanca, BP 146, Mohammedia 20650, Morocco
| | - B Achiou
- Laboratory of Materials, Membranes and Environment, Department of Chemistry, Faculty of Sciences and Technologies of Mohammedia, University Hassan II of Casablanca, BP 146, Mohammedia 20650, Morocco
| | - M Ouammou
- Laboratory of Materials, Membranes and Environment, Department of Chemistry, Faculty of Sciences and Technologies of Mohammedia, University Hassan II of Casablanca, BP 146, Mohammedia 20650, Morocco
| | - M El Rhazi
- Laboratory of Materials, Membranes and Environment, Department of Chemistry, Faculty of Sciences and Technologies of Mohammedia, University Hassan II of Casablanca, BP 146, Mohammedia 20650, Morocco
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19
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Zhao S, Song P, Wang Z, Zhu H. The PEGylation of plant polyphenols/polypeptide-mediated loose nanofiltration membrane for textile wastewater treatment and antibacterial application. J Taiwan Inst Chem Eng 2018. [DOI: 10.1016/j.jtice.2017.11.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Kowalik-Klimczak A, Gierycz P. Scaling of nanofiltration membranes used for chromium(III) ions recovery from salt solutions. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2017; 76:3135-3141. [PMID: 29210699 DOI: 10.2166/wst.2017.456] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The effect of membranes' structure on the efficiency of chromium(III) ions recovery from salt solution at low pH and the efficiency of chemical cleaning of these membranes were analyzed in this work. The nanofiltration membranes (DL and HL) used in this study were provided by GE Osmonics. The DL membrane had an irregular, dense support layer structure, while the HL membrane had a loose one. In the case of the DL membrane, it was found that, under tested solutions, the layer of mineral scale formed on the surface gradually decreases the membrane permeability coefficient. In the case of the DL membrane, the scaling was observed only on the surface. On the other hand, a small roughness (118Å) and low density charge (zeta potential at level -4) of the HL membrane causes an uneven growth in deposits and, consequently, irregular nature of the surface structure which hinders the removal of accumulated sediment from the tested membranes' surface. Additionally, the loose structure of the support layer of HL membrane contributes to its internal scaling. Consequently, the permanently loose structure of the HL membrane permeability coefficient was observed.
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Affiliation(s)
- A Kowalik-Klimczak
- Department of Industrial Biotechnologies, Institute for Sustainable Technologies - National Research Institute in Radom, Pułaskiego 6/10, Radom, Poland E-mail:
| | - P Gierycz
- Faculty of Chemical and Process Engineering, Warsaw University of Technology, Waryńskiego 1, Warsaw, Poland
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21
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Interfacial polymerization of cyanuric chloride and monomeric amines: pH resistant thin film composite polyamine nanofiltration membranes. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2016.10.012] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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22
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Nicolini JV, Borges CP, Ferraz HC. Selective rejection of ions and correlation with surface properties of nanofiltration membranes. Sep Purif Technol 2016. [DOI: 10.1016/j.seppur.2016.07.042] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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23
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Werner A, Mosch M, Haseneder R, Repke JU. Selektive Abtrennung von Indium und Germanium aus Laugungslösungen mit Membranverfahren. CHEM-ING-TECH 2015. [DOI: 10.1002/cite.201500065] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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24
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Kolev V, Freger V. Molecular Dynamics Investigation of Ion Sorption and Permeation in Desalination Membranes. J Phys Chem B 2015; 119:14168-79. [DOI: 10.1021/acs.jpcb.5b06566] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vesselin Kolev
- Wolfson Department of Chemical
Engineering, Technion, Haifa 32000, Israel
| | - Viatcheslav Freger
- Wolfson Department of Chemical
Engineering, Technion, Haifa 32000, Israel
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25
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Fridman-Bishop N, Nir O, Lahav O, Freger V. Predicting the Rejection of Major Seawater Ions by Spiral-Wound Nanofiltration Membranes. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:8631-8. [PMID: 26107401 DOI: 10.1021/acs.est.5b00336] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Seawater nanofiltration (SWNF) generates a softened permeate stream and a retentate stream in which the multivalent ions accumulate, offering opportunities for practical utilization of both streams. This study presents an approach to simulation of SWNF including all major seawater ions (Na(+), Cl(-), Ca(2+), Mg(2+), and SO4(2-)) based on the Nernst-Planck equation, and uses it for permeate and retentate streams composition prediction. The number of degrees of freedom in the system was reduced by assuming a very high ionic permeability for Na(+), which only weakly affected the other parameters in the system. Two alternatives were examined to analyze the importance of concentration dependence of ion permeabilities: The assumption of constant ion permeabilities resulted in a reasonable fit with experimental data. However, for the permeate composition the overall fit was significantly improved (P < 0.0001) when the permeabilities of Ca(2+) and Mg(2+) were allowed to depend on the ratio of their total concentration to Na(+). This type of dependence emphasizes the strong interaction of divalent ions with the membrane and its effect on the membrane fixed charge through screening or charge reversal. When this effect was included, model predictions closely matched the experimental results obtained, corroborating the phenomenological approach proposed in this study.
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Affiliation(s)
| | - Oded Nir
- ‡Faculty of Civil and Environmental Engineering, Technion, Haifa, Israel 32000
| | - Ori Lahav
- ‡Faculty of Civil and Environmental Engineering, Technion, Haifa, Israel 32000
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26
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Hebbar RS, Isloor AM, Ismail AF. Preparation of antifouling polyetherimide/hydrolysed PIAM blend nanofiltration membranes for salt rejection applications. RSC Adv 2014. [DOI: 10.1039/c4ra05791k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Polyetherimide/hydrolysed PIAM blend NF membranes have been prepared and characterized. The PEI/hydrolysed PIAM composition of 80 : 20 showed very good salt rejection (sodium sulphate) up to 76% with a pure water flux of 11.8 L m−2 h−1. This study provides a simple and effective approach to produce negatively charged NF membranes for water desalination applications with low energy consumption.
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Affiliation(s)
- Raghavendra S. Hebbar
- Membrane Technology Laboratory
- Chemistry Department
- National Institute of Technology Karnataka
- Mangalore 575 025, India
| | - Arun M. Isloor
- Membrane Technology Laboratory
- Chemistry Department
- National Institute of Technology Karnataka
- Mangalore 575 025, India
| | - A. F. Ismail
- Advanced Membrane Technology Research Center (AMTEC)
- UniversitiTeknologi Malaysia
- 81310 Skudai, Malaysia
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27
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Pages N, Yaroshchuk A, Gibert O, Cortina JL. Rejection of trace ionic solutes in nanofiltration: Influence of aqueous phase composition. Chem Eng Sci 2013. [DOI: 10.1016/j.ces.2013.09.042] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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28
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Galama A, Post J, Cohen Stuart M, Biesheuvel P. Validity of the Boltzmann equation to describe Donnan equilibrium at the membrane–solution interface. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2013.04.022] [Citation(s) in RCA: 115] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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29
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30
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Review of the dielectric properties of nanofiltration membranes and verification of the single oriented layer approximation. Adv Colloid Interface Sci 2012; 173:1-11. [PMID: 22405540 DOI: 10.1016/j.cis.2012.02.001] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2011] [Revised: 02/10/2012] [Accepted: 02/13/2012] [Indexed: 11/23/2022]
Abstract
The structuring of water at soft solid surfaces remains an area of great interest to colloid science as a whole and has many applications in relation to colloid stability, foams, and wetting films as well as being central to membrane separations. Quantitatively calculating the structural components of thin layers of water and the interaction forces of hydrated molecules with the surface of pores through a layer of water having modified structure is one of the most important challenges in the physics of surface phenomenon. In this paper these effects are reviewed and discussed in relation to the confines of a capillary pore. Membrane nanofiltration is extremely complex and is dependent on the micro-hydrodynamics and interfacial events occurring at the membrane surface and within the membrane nanopores. There is significant debate as to the exact nature of these complex phenomena and rejection is typically attributed to a combination of steric and electrical effects. The electrical effects are less well understood and in particular the contribution of dielectric exclusion. A review of the two competing descriptions of dielectric exclusion is presented along with the theories currently used in modelling this phenomena. A series of rejection experiments of 0.01 M salt solutions at the membrane isoelectric point has been performed for the NF270 and NF99HF membranes. The dielectric constants inside the nanopore are calculated and these values were consistent for three of the salts studied, indicating that a simplistic model based on Born theory is accurate enough for engineering calculations and that ion solvation is most likely to be the more appropriate dielectric exclusion mechanism for true nanofiltration membranes.
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31
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Religa P, Kowalik A, Gierycz P. A new approach to chromium concentration from salt mixture solution using nanofiltration. Sep Purif Technol 2011. [DOI: 10.1016/j.seppur.2011.08.032] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Assessment of dielectric contribution in the modeling of multi-ionic transport through nanofiltration membranes. J Memb Sci 2011. [DOI: 10.1016/j.memsci.2011.05.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Déon S, Escoda A, Fievet P. A transport model considering charge adsorption inside pores to describe salts rejection by nanofiltration membranes. Chem Eng Sci 2011. [DOI: 10.1016/j.ces.2011.03.043] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Effect of highly concentrated salt on retention of organic solutes by nanofiltration polymeric membranes. J Memb Sci 2011. [DOI: 10.1016/j.memsci.2011.01.066] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Rivas BL, Pereira ED, Palencia M, Sánchez J. Water-soluble functional polymers in conjunction with membranes to remove pollutant ions from aqueous solutions. Prog Polym Sci 2011. [DOI: 10.1016/j.progpolymsci.2010.11.001] [Citation(s) in RCA: 132] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Bason S, Kaufman Y, Freger V. Analysis of Ion Transport in Nanofiltration Using Phenomenological Coefficients and Structural Characteristics. J Phys Chem B 2010; 114:3510-7. [DOI: 10.1021/jp911615n] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sarit Bason
- Zuckerberg Institute for Water Research and Department of Biotechnology and Environmental Engineering, Ben-Gurion University of the Negev, Sde-Boqer, 84990 Israel
| | - Yair Kaufman
- Zuckerberg Institute for Water Research and Department of Biotechnology and Environmental Engineering, Ben-Gurion University of the Negev, Sde-Boqer, 84990 Israel
| | - Viatcheslav Freger
- Zuckerberg Institute for Water Research and Department of Biotechnology and Environmental Engineering, Ben-Gurion University of the Negev, Sde-Boqer, 84990 Israel
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