Membranes and Membrane Technologies最新文献_第3页

Application of Electrobaromembrane Process for Separation of Aqueous Solutions of Ionic Dyes 电气膜工艺在离子染料水溶液分离中的应用

IF 1.6

Membranes and Membrane Technologies Pub Date : 2025-11-07 DOI: 10.1134/S2517751625600566

I. A. Kharchenko, I. R. Volkova, N. P. Fadeeva, E. V. Elsuf’ev, E. V. Fomenko, G. V. Akimochkina, P. A. Safronov, I. I. Ryzhkov

{"title":"Application of Electrobaromembrane Process for Separation of Aqueous Solutions of Ionic Dyes","authors":"I. A. Kharchenko, I. R. Volkova, N. P. Fadeeva, E. V. Elsuf’ev, E. V. Fomenko, G. V. Akimochkina, P. A. Safronov, I. I. Ryzhkov","doi":"10.1134/S2517751625600566","DOIUrl":"10.1134/S2517751625600566","url":null,"abstract":"A method for producing electrically conductive ceramic membranes based on a fly ash microsphere substrate and a selective layer of alumina nanofibers with a carbon coating is proposed. The formation of a carbon layer by chemical vapor deposition reduces the average pore size from 28 to 19 nm and decreases the water permeability of the membranes from 207 to 45 L/m2 h bar. A setup for an electro-baromembrane process was developed, based on a tangential filtration cell with radial flow and the capability of applying a potential to the membrane relative to a counter electrode. Experiments on the ultrafiltration of an aqueous solution of the ionic dye Berillon II showed that the rejection increases from 60 to 82% over time and is provided by the electrostatic interaction of negatively charged dye molecules with the pore surface. Applying a positive potential of +800 mV to the membrane increases the rejection by 20–25% at the beginning of the process and by 13% in the steady state due to enhanced sorption of dye molecules on the membrane surface. Applying a negative potential of –800 mV ensures a stable rejection of 93–96% and a flux of 160 L/m2 h at a pressure difference of 5 bar due to the enhanced Donnan exclusion of negatively charged dye molecules in the membrane pores. The obtained results can be used to improve the efficiency of separation, concentration, and purification processes of aqueous solutions of ionic dyes.","PeriodicalId":700,"journal":{"name":"Membranes and Membrane Technologies","volume":"7 2","pages":"144 - 153"},"PeriodicalIF":1.6,"publicationDate":"2025-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145456863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Composite Membranes on a Micro-Mesh Support for Ultrafiltration of Oil-in-Water Emulsions 微孔支撑复合膜在水包油乳液超滤中的应用

IF 1.6

Membranes and Membrane Technologies Pub Date : 2025-11-07 DOI: 10.1134/S2517751625600323

D. D. Fazullin, L. I. Fazullina, G. V. Mavrin

引用次数: 0

Current and Voltage Oscillations on Biomimetic Membranes 仿生膜上的电流和电压振荡

IF 1.6

Membranes and Membrane Technologies Pub Date : 2025-11-07 DOI: 10.1134/S2517751625600256

N. M. Kocherginsky

引用次数: 0

Influence of Electrolyte Сoncentration in the Electrodialyzer Concentrate Chamber on the Intensity of Electroconvection 电解液Сoncentration对电对流强度的影响

IF 1.6

Membranes and Membrane Technologies Pub Date : 2025-11-07 DOI: 10.1134/S2517751625600487

K. V. Brizhan, V. D. Ruleva, N. D. Pismenskaya, V. V. Nikonenko

{"title":"Influence of Electrolyte Сoncentration in the Electrodialyzer Concentrate Chamber on the Intensity of Electroconvection","authors":"K. V. Brizhan, V. D. Ruleva, N. D. Pismenskaya, V. V. Nikonenko","doi":"10.1134/S2517751625600487","DOIUrl":"10.1134/S2517751625600487","url":null,"abstract":"Increasing the mass transfer rate in electrodialysis allows for a reduction in the area of expensive membranes and, in some cases, lowers the cost of the final product. It has been experimentally established that an increase in the concentration of a KCl solution (from 0.02 to 0.75 M) in the concentrate chamber of a flow-through electrodialysis cell (cc) leads to a significant growth in the limiting current density (ilim) through the MA-41P anion-exchange membrane, provided that the desalination chamber contains a solution with a constant concentration (0.02 M KCl). This growth (36% at cc = 0.5 M) significantly exceeds the value (4%) that could be expected due to the increase in diffusion and electromigration transport of co-ions through the membrane caused by the increase in cc. As the experiment shows, an increase in cc leads, on the contrary, to a decrease in the rate of H+ and OH– ion generation at the solution/membrane boundaries, which could also contribute to an increase in the limiting and overlimiting current density. Using voltammetry, chronopotentiometry, and pH-metry, it is shown that the observed growth in ilim may be associated with the emergence of unstable equilibrium electroconvection, the possibility of which was theoretically predicted in the works of Rubinstein and Zaltzman.","PeriodicalId":700,"journal":{"name":"Membranes and Membrane Technologies","volume":"7 2","pages":"125 - 135"},"PeriodicalIF":1.6,"publicationDate":"2025-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145456861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structure and Properties of Cellulose Acetate Membranes Modified via Biocidal Compositions Obtained from Forest Chemical Raw Materials 林化原料中杀菌剂改性醋酸纤维素膜的结构与性能

IF 1.6

Membranes and Membrane Technologies Pub Date : 2025-09-16 DOI: 10.1134/S2517751625600414

T. A. Hliavitskaya, E. I. Gapan’kova, I. A. Latyshevich, E. D. Skakovskii, V. S. Kauychkina, G. B. Melnikova, Kh. Kh. Turaev, Sh. A. Kasimov, A. V. Bildyukevich

引用次数: 0

Approbation of Polysulfone Membranes for Selective Recovery of Ammonium from Aqueous Solutions Using Liquid–Liquid Membrane Contactors 聚砜膜在液-液膜接触器中选择性回收水溶液中铵的研究

IF 1.6

Membranes and Membrane Technologies Pub Date : 2025-09-16 DOI: 10.1134/S2517751625600220

V. A. Troitskiy, E. S. Titova, D. Yu. Butylskii, V. V. Nikonenko, E. S. Korzhova, V. P. Vasilevsky, N. D. Pismenskaya

{"title":"Approbation of Polysulfone Membranes for Selective Recovery of Ammonium from Aqueous Solutions Using Liquid–Liquid Membrane Contactors","authors":"V. A. Troitskiy, E. S. Titova, D. Yu. Butylskii, V. V. Nikonenko, E. S. Korzhova, V. P. Vasilevsky, N. D. Pismenskaya","doi":"10.1134/S2517751625600220","DOIUrl":"10.1134/S2517751625600220","url":null,"abstract":"The process of selective recovery of ammonium nitrogen from a multicomponent feed solution (({text{NH}}_{4}^{ + }), K+, Cl–, ({text{HPO}}_{4}^{{2 - }}), pH 9.3) into a stripping solution (HCl, pH 3.0) has been studied using a liquid–liquid membrane contactor. The feed and stripping solutions were separated by experimental polysulfone hollow fiber membranes with fundamentally different structures. One of them had a large-pore substrate and a dense nonporous layer on its surface (skin layer), and the other had an isotropic structure with uniformly distributed pores of about 50 nm in diameter. Two more asymmetric membranes made of polyetherimide or polyvinyltrimethylsilane were used for comparison. It has been shown that the ammonia nitrogen transfer coefficients through asymmetric membranes with a dense skin layer facing the feed solution are several times lower than those achieved in the case of a symmetric membrane. In the studied range of ammonium nitrogen concentrations in the feed solution (200–400 mmol/L), these coefficients reach values of (1–4) × 10–3 m/h, which are comparable with the characteristics of the best hollow fiber gas separation membranes made of other materials presented in the scientific literature. A hypothesis is proposed to explain both the observed differences in behavior between membranes with different structures and the increase in the mass transfer coefficient of ammonia nitrogen upon dilution of the feed solution.","PeriodicalId":700,"journal":{"name":"Membranes and Membrane Technologies","volume":"7 1","pages":"15 - 31"},"PeriodicalIF":1.6,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of the Molecular Weight of Polyacrylic Acid in the Coagulation Bath on Structure and Properties of Polysulfone Membranes Modified with Polyethylene Glycol and Polypropylene Glycol Block Copolymer 混凝浴中聚丙烯酸分子量对聚乙二醇和聚丙烯乙二醇嵌段共聚物改性聚砜膜结构和性能的影响

IF 1.6

Membranes and Membrane Technologies Pub Date : 2025-09-16 DOI: 10.1134/S2517751625600384

K. S. Burts, T. V. Plisko, S. A. Pratsenko, A. V. Bildyukevich

{"title":"Effect of the Molecular Weight of Polyacrylic Acid in the Coagulation Bath on Structure and Properties of Polysulfone Membranes Modified with Polyethylene Glycol and Polypropylene Glycol Block Copolymer","authors":"K. S. Burts, T. V. Plisko, S. A. Pratsenko, A. V. Bildyukevich","doi":"10.1134/S2517751625600384","DOIUrl":"10.1134/S2517751625600384","url":null,"abstract":"Membrane fouling is a major challenge in practical membrane applications, which cannot be completely avoided but can be minimized. A promising approach to membrane modification is the introduction of hydrophilic polymers or polyelectrolytes into the coagulation bath (CB) during membrane fabrication via the phase inversion method. This study systematically investigates the influence of polyacrylic acid (PAA) molecular weight (100 000, 250 000, and 450 000 g mol–1) on the structure, surface physicochemical properties, transport characteristics, and fouling resistance of polysulfone (PSf) membranes modified with the amphiphilic block copolymer polyethylene glycol-polypropylene glycol (Synperonic F108). Aqueous PAA solutions (0.4–2.0 wt %) were used as the CB. The results demonstrate that ultrafiltration PSf/Synperonic F108/PAA membranes exhibit significantly enhanced surface hydrophilicity (water contact angle decreases from 53° to 10°–32°), reduced surface roughness, and a more negatively charged surface compared to unmodified membranes. The use of PAA solutions in the CB leads to a denser membrane structure, characterized by a decrease in the average pore size and number of pores in the selective layer. As a result, the pure water permeability declines from 195 to 21–66 L m–2 h–1, while selectivity improves substantially. The rejection coefficients increase from 56 to 76–94% for polyvinylpyrrolidone (PVP K30, Mn = 40 000 g mol–1) and from 55 to 92–94% for lysozyme. The modified membrane structure and permeability also significantly enhance fouling resistance during filtration of a humic acid model solution: the flux recovery ratio (FRR) improves from 74 to 92–100%, and the total flux decline (DT) decreases from 30 to 0–5%, while maintaining high efficiency in iron and color removal.","PeriodicalId":700,"journal":{"name":"Membranes and Membrane Technologies","volume":"7 1","pages":"67 - 81"},"PeriodicalIF":1.6,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Concentration Polarization in the Pervaporation Separation of n-Butanol through a Composite Membrane Based on Poly(decyl/pentafluoropropyl acrylate)methylsiloxane Copolymer 浓度极化对聚癸基/丙烯酸五氟丙基甲基硅氧烷共聚物复合膜渗透汽化分离正丁醇的影响

IF 1.6

Membranes and Membrane Technologies Pub Date : 2025-09-16 DOI: 10.1134/S2517751625600372

T. N. Rokhmanka, G. S. Golubev, E. A. Grushevenko, I. L. Borisov

{"title":"Effect of Concentration Polarization in the Pervaporation Separation of n-Butanol through a Composite Membrane Based on Poly(decyl/pentafluoropropyl acrylate)methylsiloxane Copolymer","authors":"T. N. Rokhmanka, G. S. Golubev, E. A. Grushevenko, I. L. Borisov","doi":"10.1134/S2517751625600372","DOIUrl":"10.1134/S2517751625600372","url":null,"abstract":"The transport and separation characteristics of the composite membrane with a selective layer based on a copolymer of polydecylmethylsiloxane and polymethylpentafluoropropylsiloxane (50F5) were studied during the pervaporation recovery of n-butanol from aqueous mixtures. It was shown that the membrane with the selective layer of copolymer (M-50F5 exhibits a high separation factor for n-butanol/water (35) and a total permeate flux of 0.31 kg/(m2 h). For the first time, an analysis of the impact of concentration polarization on the efficiency of n-butanol recovery from a model fermentation mixture was conducted, including the calculation of the concentration polarization modulus and the thickness of the diffusion boundary layer. It was revealed that increasing the flow rate of the feed mixture above 30 cm/s eliminates concentration polarization effects, as evidenced by a reduction in the boundary layer thickness to zero. Optimization of the hydrodynamic regime allowed for the minimization of mass transfer limitations caused by concentration polarization, particularly at low butanol concentrations. The obtained results substantiate the potential of using 50F5-based membranes for the pervaporation recovery of butanol from fermentation broths and open new opportunities for improving separation technologies for multicomponent systems.","PeriodicalId":700,"journal":{"name":"Membranes and Membrane Technologies","volume":"7 1","pages":"32 - 42"},"PeriodicalIF":1.6,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Oxidative Dehydrogenation of Ethane on Titanium and Vanadium Oxides Deposited on SiO2 by Molecular Layer Deposition and Selective Separation of Ethylene from the Resulting Mixture 用分子层沉积法在SiO2上沉积钛钒氧化物上进行乙烷氧化脱氢并选择性分离乙烯

IF 1.6

Membranes and Membrane Technologies Pub Date : 2025-09-16 DOI: 10.1134/S2517751625600190

N. A. Zhilyaeva, E. Yu. Mironova, A. A. Malkov, A. A. Malygin, I. A. Stenina, A. B. Yaroslavtsev

{"title":"Oxidative Dehydrogenation of Ethane on Titanium and Vanadium Oxides Deposited on SiO2 by Molecular Layer Deposition and Selective Separation of Ethylene from the Resulting Mixture","authors":"N. A. Zhilyaeva, E. Yu. Mironova, A. A. Malkov, A. A. Malygin, I. A. Stenina, A. B. Yaroslavtsev","doi":"10.1134/S2517751625600190","DOIUrl":"10.1134/S2517751625600190","url":null,"abstract":"The process of oxidative dehydrogenation of ethane on titanium-vanadium oxide catalysts deposited on silica gel by the molecular layer deposition method was studied. It was shown that the deposition of titanium and vanadium on the surface of silica occurs uniformly. When at least two layers are deposited titanium oxide crystallizes in the anatase phase while vanadium oxide remains X-ray amorphous in all catalysts. The influence of the titanium-to-vanadium ratio on the activity of the obtained catalysts was studied. It was shown that the conversion of ethane and the selectivity of its conversion into ethylene increase with increasing both the number of deposited titanium and vanadium layers and temperature. The maximum values of ethane/ethylene conversion and ethylene selectivity reach 19 and 85%, respectively. The possibility of separating ethylene and ethane in a mixture of gases leaving a catalytic reactor cooled to 30°C using a grafted ion-exchange membrane with ethylene enrichment up to 90% in three runs is demonstrated. The ethylene permeability during separation achieves 36 Barrer, and the separation factor of the ethane-ethylene mixture is 3.8.","PeriodicalId":700,"journal":{"name":"Membranes and Membrane Technologies","volume":"7 1","pages":"57 - 66"},"PeriodicalIF":1.6,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrochemical Hydrogenation Using Membrane Reactors 膜反应器的电化学加氢

IF 1.6

Membranes and Membrane Technologies Pub Date : 2025-09-16 DOI: 10.1134/S2517751625600451

I. A. Stenina, A. B. Yaroslavtsev

{"title":"Electrochemical Hydrogenation Using Membrane Reactors","authors":"I. A. Stenina, A. B. Yaroslavtsev","doi":"10.1134/S2517751625600451","DOIUrl":"10.1134/S2517751625600451","url":null,"abstract":"Hydrogenation is one of the most crucial and widespread chemical processes. This review addresses the rapidly developing electrochemical hydrogenation technology using membrane reactors. A membrane acts simultaneously as a cathode for the electrochemical formation of hydrogen and a separator dividing the electrochemical compartment from the hydrogenation compartment with a substrate. Electrochemical membrane hydrogenation allows producing high-purity hydrogen directly from water, avoiding catalyst poisoning. In this case, hydrogen reaches the membrane surface in the hydrogenation compartment in a highly active atomic state. The choice of catalyst and process conditions enables one to tune selectivity of the process, and the separation of chemical processes occurring in the system can make it possible to eliminate the stage of products purification from at least some of the starting compounds and solvents. The various types of membranes that can be used in this technology are considered, as well as the processes of electrochemical hydrogenation of various organic and inorganic compounds in membrane reactors, including the processes of electrolytic hydrogen production and the operation of fuel cells. In conclusion, the prospects for the development of this technology are discussed.","PeriodicalId":700,"journal":{"name":"Membranes and Membrane Technologies","volume":"7 1","pages":"1 - 14"},"PeriodicalIF":1.6,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0