Membranes最新文献_第2页

Suitability of Electrodialysis with Monovalent Selective Anion-Exchange Membranes for Fractionation of Aqueous Mixture Containing Reactive Dye and Mineral Salt.

IF 3.3 4区工程技术

Membranes Pub Date : 2025-03-07 DOI: 10.3390/membranes15030085

Katarzyna Majewska-Nowak, Arif Eftekhar Ahmed, Martyna Grzegorzek, Karolina Baraniec

{"title":"Suitability of Electrodialysis with Monovalent Selective Anion-Exchange Membranes for Fractionation of Aqueous Mixture Containing Reactive Dye and Mineral Salt.","authors":"Katarzyna Majewska-Nowak, Arif Eftekhar Ahmed, Martyna Grzegorzek, Karolina Baraniec","doi":"10.3390/membranes15030085","DOIUrl":"10.3390/membranes15030085","url":null,"abstract":"To fulfil the goals of the circular economy, the treatment of textile wastewater should be focused on the recovery of valuable components. Monovalent anion-selective electrodialysis (MASED) was applied for the separation of reactive dyes from mineral salts. Standard cation-exchange membranes (CM membranes) and monovalent selective anion-exchange membranes (MVA membranes) were used in the electrodialysis (ED) stack. The separation efficiency was evaluated for model solutions of various reactive dyes (varying in molecular weight and chemical reactivity) containing NaCl. In the course of MASED, the mineral salt was successfully removed from the dye solutions with an efficacy of 97.4-99.4%, irrespectively of the composition of the treated solution. The transport of dye molecules through the ion-exchange membranes (IEMs) from diluate to concentrate compartments was irrelevant. Nonetheless, a significant adsorption of dye particles on the membranes was observed. Around 11-40% of the initial dye mass was deposited in the ED stack. Dye adsorption intensity was significantly affected by dye reactivity. This study showed the potential of the MASED process for the separation of the reactive dye from the mineral salt on condition that antifouling membrane properties are improved. The obtained streams (the concentrate rich in mineral salt and the diluate containing the reactive dye) can be reused in the dye-house textile operations; however, some loss of dye mass should be included.","PeriodicalId":18410,"journal":{"name":"Membranes","volume":"15 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11943749/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143710613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced Protein Separation Performance of Cellulose Acetate Membranes Modified with Covalent Organic Frameworks.

IF 3.3 4区工程技术

Membranes Pub Date : 2025-03-06 DOI: 10.3390/membranes15030084

Shurui Shao, Maoyu Liu, Baifu Tao, Kayode Hassan Lasisi, Wenqiao Meng, Xing Wu, Kaisong Zhang

{"title":"Enhanced Protein Separation Performance of Cellulose Acetate Membranes Modified with Covalent Organic Frameworks.","authors":"Shurui Shao, Maoyu Liu, Baifu Tao, Kayode Hassan Lasisi, Wenqiao Meng, Xing Wu, Kaisong Zhang","doi":"10.3390/membranes15030084","DOIUrl":"10.3390/membranes15030084","url":null,"abstract":"As a porous crystalline material, covalent organic frameworks (COFs) have attracted significant attention due to their extraordinary features, such as an ordered pore structure and excellent stability. Synthesized through the aldehyde amine condensation reaction, TpPa-1 COFs (Triformylphloroglucinol-p-Phenylenediamine-1 COFs) were blended with cellulose acetate (CA) to form a casting solution. The TpPa-1 COF/CA ultrafiltration membrane was then prepared using the non-solvent-induced phase inversion (NIPS) method. The influence of TpPa-1 COFs content on the hydrophilicity, stability and filtration performance of the modified membrane was studied. Due to the hydrophilic groups in TpPa-1 COFs and the network structure formed by covalent bonds, the modified CA membranes exhibited higher hydrophilicity and lower protein adsorption compared with the pristine CA membrane. The porous crystalline structure of TpPa-1 COFs increased the water permeation path in the CA membrane, improving the permeability of the modified membrane while maintaining an outstanding bovine serum albumin (BSA) rejection. Furthermore, the addition of TpPa-1 COFs reduced protein adsorption on the CA membrane and overcame the trade-off between permeability and selectivity in CA membrane bioseparation applications. This approach provides a sustainable method for enhancing membrane performance while enhancing the application of membranes in protein purification.","PeriodicalId":18410,"journal":{"name":"Membranes","volume":"15 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11944191/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143710493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pressure-Driven Membrane Processes for Removing Microplastics.

IF 3.3 4区工程技术

Membranes Pub Date : 2025-03-05 DOI: 10.3390/membranes15030081

Priscila Edinger Pinto, Alexandre Giacobbo, Gabriel Maciel de Almeida, Marco Antônio Siqueira Rodrigues, Andréa Moura Bernardes

{"title":"Pressure-Driven Membrane Processes for Removing Microplastics.","authors":"Priscila Edinger Pinto, Alexandre Giacobbo, Gabriel Maciel de Almeida, Marco Antônio Siqueira Rodrigues, Andréa Moura Bernardes","doi":"10.3390/membranes15030081","DOIUrl":"10.3390/membranes15030081","url":null,"abstract":"The intense consumption of polymeric materials combined with poor waste management results in the dissemination of their fragments in the environment as micro- and nanoplastics. They are easily dispersed in stormwater, wastewater, and landfill leachate and carried towards rivers, lakes, and oceans, causing their contamination. In aqueous matrices, the use of membrane separation processes has stood out for the efficiency of removing these particulate contaminants, achieving removals of up to 100%. For this review article, we researched the removal of microplastics and nanoplastics by membrane processes whose driving force is the pressure gradient. The analysis focuses on the challenges found in the operation of microfiltration, ultrafiltration, nanofiltration, and reverse-osmosis systems, as well as on the innovations applied to the membranes, with comparisons of treatment systems and the peculiarities of each system and each aqueous matrix. We also point out weaknesses and opportunities for future studies so that these techniques, known to be capable of removing many other contaminants of emerging concern, can subsequently be widely applied in the removal of micro- and nanoplastics.","PeriodicalId":18410,"journal":{"name":"Membranes","volume":"15 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11944205/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143710519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on Organo-Silica-Derived Membranes Using a Robeson-like Plot.

IF 3.3 4区工程技术

Membranes Pub Date : 2025-03-05 DOI: 10.3390/membranes15030083

Lucas Bünger, Tim van Gestel, Tim Kurtz, Krassimir Garbev, Peter Stemmermann, Wilhelm A Meulenberg, Olivier Guillon, Dieter Stapf

{"title":"Study on Organo-Silica-Derived Membranes Using a Robeson-like Plot.","authors":"Lucas Bünger, Tim van Gestel, Tim Kurtz, Krassimir Garbev, Peter Stemmermann, Wilhelm A Meulenberg, Olivier Guillon, Dieter Stapf","doi":"10.3390/membranes15030083","DOIUrl":"10.3390/membranes15030083","url":null,"abstract":"For industrial CO2 utilization, the supply of concentrated CO2 within a continuous, high-volume stream at high temperatures remains a substantial requirement. Membrane processes offer a simple and efficient method to provide CO2 in this form. While several organo-silica-based membranes have been developed for CO2/N2 separation under these conditions, there is no standardized framework guiding comparability and optimization. Therefore, we present these membranes in a Robeson-like plot across various temperatures. Utilizing a standard 1,2-bis(triethoxysilyl)-ethane (BTESE) precursor and a simplified sol-gel method, we prepared a microporous membrane layer and characterized it for an exemplary comparison. This characterization includes key parameters for mixed-gas applications: (1) temperature-dependent single- and mixed-gas permeances to observe interactions, (2) the impact of the driving forces in mixtures (vacuum and concentration) to distinguish between permselectivity and the separation factor clearly, and (3) influence of the support structure to enable permeability calculations at elevated temperatures. Furthermore, a quick interpretation method for assessing the membrane's microstructure is presented. A qualitative microstructure assessment can be achieved by analyzing the temperature dependencies of the three major diffusion mechanisms that simultaneously occur-Knudsen, surface, and activated diffusion.","PeriodicalId":18410,"journal":{"name":"Membranes","volume":"15 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11943757/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143710612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Remediation of Micro- and Nanoplastics by Membrane Technologies.

IF 3.3 4区工程技术

Membranes Pub Date : 2025-03-05 DOI: 10.3390/membranes15030082

Michał Bodzek, Piotr Bodzek

{"title":"Remediation of Micro- and Nanoplastics by Membrane Technologies.","authors":"Michał Bodzek, Piotr Bodzek","doi":"10.3390/membranes15030082","DOIUrl":"10.3390/membranes15030082","url":null,"abstract":"Micro- and nanoplastics (NPs) cannot be completely removed from water/wastewater in conventional wastewater treatment plants (WWTPs) and drinking water treatment plants (DWTPs). According to the literature analysis, membrane processes, one of the advanced treatment technologies, are the most effective and promising technologies for the removal of microplastics (MPs) from water and wastewater. In this article, firstly, the properties of MPs commonly found in water and wastewater treatment and their removal efficiencies are briefly reviewed. In addition, research on the use of microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), reverse osmosis (RO), and membrane bioreactors (MBR) for the remediation of MPs and NPs from water/wastewater is reviewed, and the advantages/disadvantages of each removal method are discussed. Membrane filtration is also compared with other methods used to remove MPs. Furthermore, the problem of membrane fouling by MPs during filtration and the potential for MPs to be released from the polymeric membrane structure are discussed. Finally, based on the literature survey, the current status and gaps in research on MPs removal by membrane technologies are identified, and recommendations for further research are made.","PeriodicalId":18410,"journal":{"name":"Membranes","volume":"15 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11943828/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143710442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Veratridine-Induced Oscillations in Nav 1.7 but Not Nav 1.5 Sodium Channels Are Revealed by Membrane Potential Sensitive Dye.

IF 3.3 4区工程技术

Membranes Pub Date : 2025-03-05 DOI: 10.3390/membranes15030080

Sarah C R Lummis, Samantha C Salvage, Christopher L-H Huang, Antony P Jackson

{"title":"Veratridine-Induced Oscillations in Nav 1.7 but Not Nav 1.5 Sodium Channels Are Revealed by Membrane Potential Sensitive Dye.","authors":"Sarah C R Lummis, Samantha C Salvage, Christopher L-H Huang, Antony P Jackson","doi":"10.3390/membranes15030080","DOIUrl":"10.3390/membranes15030080","url":null,"abstract":"Voltage-gated sodium channels (Navs) are critical for membrane potential depolarisation in cells, with especially important roles in neuronal and cardiomyocyte membranes. Their malfunction results in a range of disorders, and they are the target of many widely used drugs. A rapid yet accurate functional assay is therefore desirable both to probe for novel active compounds and to better understand the many different Nav isoforms. Here, we use fluorescence to monitor Nav function: cells expressing either the cardiac Nav 1.5 or pain-associated Nav 1.7 were loaded with fluorescent membrane potential sensitive dye and then stimulated with veratridine. Cells expressing Nav 1.5 show a concentration-dependent slow rise and then a plateau in fluorescence. In contrast, cells expressing Nav 1.7 show a more rapid rise and then unexpected oscillatory behavior. Inhibition by flecainide and mexiletine demonstrates that these oscillations are Nav-dependent. Thus, we show that this fluorescent membrane potential dye can provide useful functional data and that we can readily distinguish between these two Nav isoforms because of the behavior of cells expressing them when activated by veratridine. We consider these distinct behaviors may be due to different interactions of veratridine with the different Nav isoforms, although more studies are needed to understand the mechanism underlying the oscillations.","PeriodicalId":18410,"journal":{"name":"Membranes","volume":"15 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11944043/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143710531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Importance of Bilayer Asymmetry in Biological Membranes: Insights from Model Membranes.

IF 3.3 4区工程技术

Membranes Pub Date : 2025-03-03 DOI: 10.3390/membranes15030079

Igor S Oliveira, Guilherme X Pinheiro, Maria Luana B Sa, Pedro Henrique L O Gurgel, Samuel U Pizzol, Rosangela Itri, Vera B Henriques, Thais A Enoki

{"title":"The Importance of Bilayer Asymmetry in Biological Membranes: Insights from Model Membranes.","authors":"Igor S Oliveira, Guilherme X Pinheiro, Maria Luana B Sa, Pedro Henrique L O Gurgel, Samuel U Pizzol, Rosangela Itri, Vera B Henriques, Thais A Enoki","doi":"10.3390/membranes15030079","DOIUrl":"10.3390/membranes15030079","url":null,"abstract":"This mini-review intends to highlight the importance of bilayer asymmetry. Biological membranes are complex structures that are a physical barrier separating the external environment from the cellular content. This complex bilayer comprises an extensive lipid repertory, suggesting that the different lipid structures might play a role in the membrane. Interestingly, this vast repertory of lipids is asymmetrically distributed between leaflets that form the lipid bilayer. Here, we discuss the properties of the plasma membrane from the perspective of experimental model membranes, consisting of simplified and controlled in vitro systems. We summarize some crucial features of the exoplasmic (outer) and cytoplasmic (inner) leaflets observed through investigations using symmetric and asymmetric membranes. Symmetric model membranes for the exoplasmic leaflet have a unique lipid composition that might form a coexistence of phases, namely the liquid disordered and liquid order phases. These phase domains may appear in different sizes and shapes depending on lipid composition and lipid-lipid interactions. In contrast, symmetric model membranes for the cytoplasmic leaflet form a fluid phase. We discuss the outcomes reported in the literature for asymmetric bilayers, which vary according to lipid compositions and, consequently, reflect different intra- and inter-leaflet interactions. Interestingly, the asymmetric bilayer could show induced domains in the inner leaflet, or it could decrease the tendency of the outer leaflet to phase separation. If cells regulate the lipid composition of the plasma membrane, they can adjust the existence and sizes of the domains by tuning the lipid composition.","PeriodicalId":18410,"journal":{"name":"Membranes","volume":"15 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11943618/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143710523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation of Crown Ether-Containing Polyamide Membranes via Interfacial Polymerization and Their Desalination Performance.

IF 3.3 4区工程技术

Membranes Pub Date : 2025-03-03 DOI: 10.3390/membranes15030077

Liqing Xing, Liping Lin, Jiaxin Guo, Xinping He, Chunhai Yi

{"title":"Preparation of Crown Ether-Containing Polyamide Membranes via Interfacial Polymerization and Their Desalination Performance.","authors":"Liqing Xing, Liping Lin, Jiaxin Guo, Xinping He, Chunhai Yi","doi":"10.3390/membranes15030077","DOIUrl":"10.3390/membranes15030077","url":null,"abstract":"The large-scale application of aromatic polyamide (PA) thin-film composite (TFC) membranes for reverse osmosis has provided an effective way to address worldwide water scarcity. However, the water permeability and salt rejection capabilities of the PA membrane remain limited. In this work, cyclic micropores based on crown ether were introduced into the PA layer using a layer-by-layer interfacial polymerization (LbL-IP) method. After interfacial polymerization between m-phenylenediamine (MPD) and trimesoyl chloride (TMC), the di(aminobenzo)-18-crown-6 (DAB18C6) solution in methanol was poured on the membrane to react with the residual TMC. The cyclic micropores of DAB18C6 provided the membrane with rapid water transport channels and improved ion rejection due to its hydrophilicity and size sieving effect. The membranes were characterized by FTIR, XPS, SEM, and AFM. Compared to unmodified membranes, the water contact angle decreased from 54.1° to 31.6° indicating better hydrophilicity. Moreover, the crown ether-modified membrane exhibited both higher permeability and enhanced rejection performance. The permeability of the crown ether-modified membrane was more than ten times higher than unmodified membranes with a rejection above 95% for Na2SO4, MgSO4, MgCl2, and NaCl solution. These results highlight the potential of this straightforward surface grafting strategy and the modified membranes for advanced water treatment technologies, particularly in addressing seawater desalination challenges.","PeriodicalId":18410,"journal":{"name":"Membranes","volume":"15 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11944259/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143710517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing the Performance of Tangential Flow Microfiltration for Bioreactor Clarification.

IF 3.3 4区工程技术

Membranes Pub Date : 2025-03-03 DOI: 10.3390/membranes15030078

Amir Hossein Mostafavi, Liang-Kai Chu, Xianghong Qian, John Paul Smelko, Da Zhang, Andrew Zydney, Sumith Ranil Wickramasinghe

{"title":"Enhancing the Performance of Tangential Flow Microfiltration for Bioreactor Clarification.","authors":"Amir Hossein Mostafavi, Liang-Kai Chu, Xianghong Qian, John Paul Smelko, Da Zhang, Andrew Zydney, Sumith Ranil Wickramasinghe","doi":"10.3390/membranes15030078","DOIUrl":"10.3390/membranes15030078","url":null,"abstract":"Tangential flow microfiltration is easily adapted for batch and continuous bioreactor clarification. The permeate can be introduced directly to the subsequent capture step. However, the commercial use of tangential flow filtration (TFF) is limited by membrane fouling, leading to a compromised performance. Here, we explored the possibility of reducing membrane fouling by integrating a hydrocyclone as the primary clarification operation. The overflow from the hydrocyclone was introduced directly as the feed to the microfiltration module. Chinese hamster ovary cells were used as the feed stream to investigate the feasibility of this integrated process. A range of cell viabilities from 0% (cell lysate) to 96% were investigated. The cell densities ranged from 0.9 to 10 million cells per mL. Two commercially available hollow fiber microfiltration membranes were used, an essentially symmetric membrane and a reverse asymmetric membrane where the more open support structure faced the feed stream. The reverse asymmetric membrane was more resistant to fouling in the absence of an integrated hydrocyclone. Integrating a hydrocyclone led to a reduction in the flux decline for the symmetric membrane, but did not affect the performance of the reverse asymmetric membrane. The careful choice of membrane morphology and pore size is important when designing an integrated process.","PeriodicalId":18410,"journal":{"name":"Membranes","volume":"15 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11943935/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143710496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tailoring the Performance of a Composite PEI Nanofiltration Membrane via Incorporating Activated PDA for Efficient Dye Sieving and Salt Separation.

IF 3.3 4区工程技术

Membranes Pub Date : 2025-03-02 DOI: 10.3390/membranes15030075

Wanting Li, Jiaye Liu, Weifu Wang, Shichun Chen, Fengwei Jia, Xiang Li, Ying Zhao, Wenjuan Zhang, Dan Song, Jun Ma

{"title":"Tailoring the Performance of a Composite PEI Nanofiltration Membrane via Incorporating Activated PDA for Efficient Dye Sieving and Salt Separation.","authors":"Wanting Li, Jiaye Liu, Weifu Wang, Shichun Chen, Fengwei Jia, Xiang Li, Ying Zhao, Wenjuan Zhang, Dan Song, Jun Ma","doi":"10.3390/membranes15030075","DOIUrl":"10.3390/membranes15030075","url":null,"abstract":"Efficient dye sieving and salt separation can facilitate the recycling of valuable resources in textile wastewater treatment. This study focuses on developing a high-performance nanofiltration membrane (NF) by co-depositing activated polydopamine (O-PDA), oxidized with KMnO4, and polyethyleneimine (PEI) onto a polysulfone support membrane (PSF), thereby enabling effective dye sieving and salt separation. Due to the high hydrophilicity of PDA and the formation of high molecular polymers after oxidation, it was anticipated that O-PDA would crosslink the PEI layer, providing rapid permeating channels. Filtration experiments demonstrated that the formation of O-PDA significantly enhanced the salt retention rate of nanofiltration membranes, achieving a nearly threefold increase in NaCl retention from 15% to 45.7%. It was observed that the retention performance of O-PDA could be adjusted by controlling its loading or oxidation level. Furthermore, despite a notable reduction in permeability, the dye removal efficiency of the O-PDA/PEI membrane increased substantially to 99.5%. Long-term filtration experiments also confirmed both the stability and anti-fouling properties of this membrane design. Clearly, owing to its excellent operational stability and anti-fouling characteristics, the O-PDA/PEI membrane exhibits great potential for applications in dye sieving and salt separation.","PeriodicalId":18410,"journal":{"name":"Membranes","volume":"15 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11943965/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143710615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0