Journal of Membrane Science最新文献

{"title":"Treatment of carbocysteine wastewater by bipolar membrane electrodialysis: From lab-to pilot-scale","authors":"Zheng Peng ,&nbsp;Hongping Wang ,&nbsp;Yanyan Cheng ,&nbsp;Xueqing Ma ,&nbsp;Yanxu Chu ,&nbsp;Xiaoyang Hu","doi":"10.1016/j.memsci.2023.122056","DOIUrl":"10.1016/j.memsci.2023.122056","url":null,"abstract":"<div><p>Carbocysteine (H₂ccys) wastewater, which contains H₂<span>ccys, chloroacetic acid, and ammonium chloride, can pose significant risks to the environment. In this study, a novel strategy was proposed for treating H</span>₂<span>ccys wastewater by bipolar membrane electrodialysis<span> (BMED) to realize resource recovery. The migration and coexistence mechanism of organic/inorganic ions in wastewater were investigated in lab-scale experiments. The results indicated that the desirable migration of inorganic ions, such as NH</span></span>₄⁺ and Cl⁻ ions, in the feed compartment were dominant. The undesirable migration of organic molecules, such as ClCH₂COOH and H₂ccys, could be managed through precise control of the BMED reaction process. To optimize the energy efficiency and thermal effect occurred in the pilot-scale, a two-stage BMED process was designed for treating H₂ccys wastewater. The results revealed that BMED produced 1.33–1.63 M of HCl and 2.62–2.88 M of NH₃·H₂O, and removed 90 wt% of NH₄Cl from H₂ccys wastewater. Meanwhile, the thermal effect of the slot at the outermost acid compartment decreased from 3.32 W in the one-stage BMED process to 0.10 W in the two-stage BMED process during the pilot-scale tests. The current efficiency of the two-stage BMED process for the acid/base production and feed desalination in the pilot-scale tests increased and its energy consumption decreased compared with the lab-scale tests. Moreover, the BMED r<strong>^r</strong>ecycling route showed that a closed loop can be realized in the treatment of H₂ccys wastewater, and its economic assessment showed that applying BMED to the treatment of H₂ccys wastewater have economic benefits. These findings illustrated the feasibility of this novel strategy for treating H₂ccys wastewater and laid a solid foundation for its industrialization.</p></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"687 ","pages":"Article 122056"},"PeriodicalIF":9.5,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48724099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Partial oxidation of biomass gasification tar with oxygen transport membranes","authors":"Lev Martinez Aguilera ,&nbsp;Maria Puig-Arnavat ,&nbsp;Simona Ovtar ,&nbsp;Jonas Gurauskis ,&nbsp;Jesper Ahrenfeldt ,&nbsp;Ulrik Birk Henriksen ,&nbsp;Peter Vang Hendriksen ,&nbsp;Ragnar Kiebach ,&nbsp;Astri Bjørnetun Haugen","doi":"10.1016/j.memsci.2023.121769","DOIUrl":"https://doi.org/10.1016/j.memsci.2023.121769","url":null,"abstract":"<div><p>Dual phase oxygen transport membranes were directly integrated into the producer gas stream of a low temperature circulating fluidized bed (LT-CFB) gasifier for partial oxidation of tar. Ce_0.9Gd_0.1O_1.95–La_0.6Sr_0.4FeO_3-d composite membranes were prepared by extrusion and dip-coating, co-sintered and infiltrated with electro-catalysts. These were investigated in two different set-ups: i) a membrane test rig, and ii) a partial oxidation testing unit connected to a biomass gasifier. The stability and performance of the membrane were tested in two different gas-streams; i) H₂ and ii) producer gas. An oxygen flux of 1.5 Nml∙cm⁻²∙min⁻¹ was measured in an air/H₂ gradient at 850 °C through a 10 cm long membrane with a diameter of 10 mm, whereas a lower oxygen flux of 0.5 Nml∙cm⁻²∙min⁻¹ was measured for the air/producer gas case. The producer gas contained ca. 2000 mg Nm⁻³ of primary tar. Analysis of the gas and the tar composition at the output of the membrane unit demonstrated that it contributed to the partial oxidation of the primary tar, resulting in a twofold increase of H₂, CH₄ and CO in the producer gas. This successful integration of oxygen transport membranes demonstrated that these membranes can reduce the tar content in producer gas from biomass gasifiers.</p></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"681 ","pages":"Article 121769"},"PeriodicalIF":9.5,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1812219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New insights into confined diffusion mechanisms of end-capping reagent regulated interfacial polymerization","authors":"Wenyan Ji ,&nbsp;Feng Duan ,&nbsp;Chunlei Su ,&nbsp;Baogang Sun ,&nbsp;Lulu Liu ,&nbsp;Yang Cao ,&nbsp;Xingzhong Cao ,&nbsp;Jianquan Luo ,&nbsp;Yuping Li ,&nbsp;Hongbin Cao","doi":"10.1016/j.memsci.2023.121754","DOIUrl":"https://doi.org/10.1016/j.memsci.2023.121754","url":null,"abstract":"<div><p><span>The permeability and selectivity of polyamide<span> (PA) nanofiltration membranes depend on the physicochemical structure of the active layer including the crosslinking degree, uniformity, microstructure, and thickness. The additive control strategy has been regarded as a successful method to regulate nanofiltration performance. Herein, the functionalized end-capping reagent, sulfanilic acid, as a co-reactive additive is introduced in the aqueous phase to adjust the homogeneity and thickness of polyamide layer by changing the diffusion behavior of the amine and cross-linking degree of nascent membrane. The end-capping reagent regulates the interfacial polymerization process, which can optimize the distribution of charge density and structural characteristics of polyamide layer, and improve the aperture property by a simple one-step method. The PA-10 with a combination structure of the round-like and ridge-and-valley possesses a favorable water permeance of 23.2 L m</span></span>⁻² h⁻¹ bar⁻¹, which has at least 50% increment in flux while retaining the Na₂SO₄<span><span> rejection compared to the PA-0 (without the additives). Furthermore, the mechanism of interfacial polymerization regulated by end-capping reagents has been studied by the Doppler broadened energy spectrum, thermodynamic molecular reactivity, and molecular dynamics behavior. The loose nascent layer generated by end-capping reagents results in confined diffusion of monomer in the aqueous phase, thus favoring the formation of a thin compact separation layer and improving the </span>membrane separation performance. This work elucidates the mechanism of end-capping reagent sulfanilic acid regulating the interfacial polymerization process and the connection between the composition and performance of nanofiltration membranes, which provides guidance for the controllable design of nanofiltration membranes.</span></p></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"681 ","pages":"Article 121754"},"PeriodicalIF":9.5,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3339362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Construction of highly permeable organic solvent nanofiltration membrane via β-cyclodextrin assisted interfacial polymerization","authors":"Shaoxiao Liu ,&nbsp;Fangyuan Yang ,&nbsp;Jin Zhou ,&nbsp;Yu Peng ,&nbsp;Enlin Wang ,&nbsp;Junjie Song ,&nbsp;Baowei Su","doi":"10.1016/j.memsci.2023.122052","DOIUrl":"10.1016/j.memsci.2023.122052","url":null,"abstract":"<div><p>As the key of organic solvent nanofiltration (OSN) technology, OSN membranes could effectively retain small molecules with molecular weight between 200 and 1000 Dalton (Da), but they still face some problems such as low solvent permeance. In this work, we fabricated a poly(amide-ester) selective layer on polyimide substrate surface by introducing β-cyclodextrin (β-CD) into the aqueous phase solution to assist the interfacial polymerization reaction between <em>m</em>-phenylenediamine (MPD) and trimesoyl chloride (TMC), followed by cross-linking and solvent activation treatment. Thus, we successfully fabricated a kind of thin film composite (TFC) membrane with high selective permeability for OSN. We emphasized that extra-low contents were employed for both MPD and β-CD, which were 0.05 wt% and 50 mg L⁻¹, respectively. The effect of β-CD content on the pore size, surface shape, surface hydrophilicity, surface chemistry, filtration performance, as well as durability performance of the OSN membrane was studied in depth. β-CD endows the selective layer with better hydrophilicity and larger pore size. The optimized OSN membrane possesses a Rhodamine B (RDB, 479 Da) rejection of 99.2 % and an ethanol permeance of 70.6 L m⁻² h⁻¹ MPa⁻¹. Furthermore, the optimized OSN membrane remains above 99 % RDB rejection after being immersed in DMF at 25 °C for 1000 h, which demonstrates its superb solvent resistance. Additionally, the optimized OSN membrane exhibits outstanding long-time performance and possesses a rejection of 98 % for Jacobsen catalyst during more than 106 h semi-continuous filtration using Jacobsen catalyst/ethyl acetate solution as feed, indicating its vast potential in the recovery of catalyst.</p></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"687 ","pages":"Article 122052"},"PeriodicalIF":9.5,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0376738823007081/pdfft?md5=58d9bff9f64f371e0a673b3c9b7fb3ed&pid=1-s2.0-S0376738823007081-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49053293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nucleophilic substituted NH2-MIL-125 (Ti)/polyvinylidene fluoride hollow fiber mixed matrix membranes for CO2/CH4 separation and CO2 permeation prediction via theoretical models","authors":"Sie Hao Ding ,&nbsp;Pei Ching Oh ,&nbsp;Hilmi Mukhtar ,&nbsp;Asif Jamil","doi":"10.1016/j.memsci.2023.121746","DOIUrl":"https://doi.org/10.1016/j.memsci.2023.121746","url":null,"abstract":"<div><p><span><span>Improper degree of nucleophilic substitution on PVDF may reduce the crystallinity of the membrane and weaken </span>mechanical properties. Subsequently, the drop in membrane crystallinity might cause a decline in membrane performance, particularly in gas separation, which was unpropitious. Also, inappropriate models for predicting CO</span>₂ permeation of MMMs would lead to incompatibility between theoretical results and experimental CO₂<span> permeation data, subsequently affecting the design of the membrane separation system. In the current work, ammonia solutions with 3 different concentrations (25, 30, and 35% v/v) were used to modify PVDF incorporated with 2 wt% NH</span>₂<span><span>-MIL-125 (Ti). The SEM, XPS, </span>XRD<span>, contact angle, and mechanical analyses were performed to investigate the structural changes, degree of substitution on PVDF, crystallinity, hydrophilicity, and changes in mechanical strength, respectively. In single and CO</span></span>₂/CH₄ (50:50) mixed gas test, PVDF-4 showed the highest ideal and real selectivity, which also showed a good increment in CO₂ permeance compared to pure PVDF and 2 wt% NH₂-MIL-125 (Ti)/PVDF HFMMM. Therefore, appropriate ammonia solution modification conditions are required to enhance the membrane properties without severely compromising the stability of the membrane and ensuring better CO₂ gas separation. After aging, PVDF-4 demonstrated a 23% reduction in CO₂ permeance, while also showing a 9% improvement in CO₂/CH₄<span> ideal selectivity. The optimized membranes were then coated with PDMS to enhance its CO</span>₂/CH₄ (50:50) mixed gas separation performance. The basic Maxwell, Bruggeman, Pal, Lewis–Nielson, and Bottcher model, along with modified Pal model, were used to estimate the CO₂ permeation of PVDF HFMMMS developed. Modified Pal model demonstrated −3.68 AARE<em>%</em> towards PVDF-2 which has higher accuracy in the prediction of CO₂ permeation compared to other models in this study.</p></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"681 ","pages":"Article 121746"},"PeriodicalIF":9.5,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1696211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel polyamide thin-film nanocomposite reverse osmosis membrane constructed by a 3D multi-layer graphene oxide assembled with 1,3-diamino-2-propanol","authors":"Ting Su,&nbsp;Xun Li,&nbsp;Zhen-Miao Yang,&nbsp;Li-Fen Liu","doi":"10.1016/j.memsci.2023.121773","DOIUrl":"https://doi.org/10.1016/j.memsci.2023.121773","url":null,"abstract":"<div><p><span>Polyamide<span> (PA) thin-film composite (TFC) reverse osmosis<span> (RO) membrane has been widely used for desalination to produce fresh water. In order to further enhance the membrane’s water flux without sacrificing the salt rejection, in this study, a new kind of three-dimension (3D) multi-layer graphene oxide<span> (mGO) was synthesized through the layer-by-layer (LbL) crosslinking between the sing-layer GO (sGO) nanosheet and 1,3-diamino-2-propanol (DAPL) molecule, and then was introduced into the aqueous phase solution to modify the conventional polyamide TFC RO membrane via interfacial polymerization (IP). The size and structure of mGO were regulated through the optimization of LbL crosslinking techniques, and the effect of mGO on the micro-structure and macro-property of thin-film </span></span></span></span>nanocomposite (TFN) RO membrane was correspondingly investigated. It was found that the mGO made the PA layer surface of RO membrane smoother and more hydrophilic. Most importantly, it increased the water flux of RO membrane, improved the salt rejection above 99.3%, and endowed the RO membrane better long-term stability. Obviously, this is due to that mGO created a certain d-spacing through crosslinking DAPL molecules between sGO nanosheets, which provided channels for water transport across the PA layer and thus accelerated the migration of water molecules in the membrane, ultimately enhancing the water flux of TFN RO membrane. Meanwhile, the DAPL grafted on the outmost surface of mGO enhanced the compatibility between mGO(30) and PA polymeric matrix via the reaction with TMC during the IP, further improving the membrane’s salt rejection. Therefore, this study provides a facile way to improve the comprehensive separation performance of RO membrane.</p></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"681 ","pages":"Article 121773"},"PeriodicalIF":9.5,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1815688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advanced proton exchange membrane prepared from N-heterocyclic poly(aryl ether ketone)s with pendant benzenesulfonic moieties and performing enhanced radical tolerance and fuel cell properties","authors":"Qian Liu,&nbsp;Shouhai Zhang,&nbsp;Lin Zhuo,&nbsp;Zhaoqi Wang,&nbsp;Chenghao Wang,&nbsp;Fenchen Sun,&nbsp;Kang Niu,&nbsp;Feiqi Xu,&nbsp;Xuefu Che,&nbsp;Jie Zhang,&nbsp;Xigao Jian","doi":"10.1016/j.memsci.2023.121767","DOIUrl":"https://doi.org/10.1016/j.memsci.2023.121767","url":null,"abstract":"<div><p><span>The application of sulfonated poly(aryl ether)s proton exchange membranes in fuel cells is hampered by the inadequate oxidation<span> stability and the trade-off effect between proton-conducting performance and physicochemical stability. So the sulfonated N-heterocyclic poly(aryl ether ketone)s (SPBPEK-Ps) membranes possessing fine proton-conducting behavior and radical tolerance are manufactured by the elaborate design of molecular backbones. The hydrophilic units containing proton-conducting groups in pendant moieties in SPBPEK-Ps contribute to constructing developed proton-conducting channels, in which the multiple interactions between sulfonic groups and N-heterocycles further promote proton conduction with the conductivity of up to 125 mS cm</span></span>⁻¹. The fuel cells loading SPBPEK-Ps membranes perform a power density of up to 1210 mW cm⁻² with hypo-sensitivity to temperature and oxidized gas. A couple of steric hindrances from pendant proton-conducting groups and the diminished affinity of radicals for molecular chains resulting from the introduction of N-heterocyclic structure enhance the oxidation stability of SPBPEK-Ps membranes, and the break time of the membranes at 80 °C ranges in 2.5–7.8 h. The combination of the pendant proton-conducting groups and N-heterocycles with the electron-withdrawing effect would contribute to improving proton-conducting performance and oxidation stability and attenuating the trade-off effect between them.</p></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"681 ","pages":"Article 121767"},"PeriodicalIF":9.5,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1696210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improved artificial neural networks (ANNs) for predicting the gas separation performance of polyimides","authors":"Min Zhao,&nbsp;Caili Zhang,&nbsp;Yunxuan Weng","doi":"10.1016/j.memsci.2023.121765","DOIUrl":"https://doi.org/10.1016/j.memsci.2023.121765","url":null,"abstract":"<div><p><span>This study aimed to establish a quantitative structure–property relationship (QSPR) model for predicting the gas separation performance of polyimide<span> membranes using neural networks<span> combined with the repeat unit structure of materials. Using a data bank based on 125 polyimides, we calculated a total of 20 descriptors for all polyimides using Yampolskii's group contribution method, which divides polyimides' repeat units into their smallest groups. The number of groups contained in each polyimide is taken as the network input, and the gas permeability as the network output. Two neural network models, back-propagation (BP) and genetic algorithm-optimized back-propagation (GABP) algorithms, were used as the prediction model, and the prediction results were compared. When compared with the previous models used to predict the gas separation performance for all polymers and other machine learning (ML) models, the prediction results obtained using the GABP model are encouraging, showing a root mean squared error (RMSE) of 0.44 for CO</span></span></span>₂, indicating that the model is applicable to polyimide. In addition, the GABP model is easy to operate, requires few parameters, it is also applicable to copolyimides. The GABP model based on the group contribution method can thus satisfactorily predict polyimides' gas separation. This is expected to be used to guide the synthesis and structure screening of polyimides for saving resources and commercialization.</p></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"681 ","pages":"Article 121765"},"PeriodicalIF":9.5,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1696212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrogen sulfide permeation and hydrocarbon separation properties in cellulose triacetate hollow fiber membrane for high hydrogen sulfide contained natural gas sweetening applications","authors":"Atsushi Morisato,&nbsp;Ed Mahley","doi":"10.1016/j.memsci.2023.121734","DOIUrl":"https://doi.org/10.1016/j.memsci.2023.121734","url":null,"abstract":"<div><p><span>Hydrogen sulfide (H</span>₂<span>S) permeation and hydrocarbon (HC) separation was investigated on commercial asymmetric cellulose triacetate (CTA) hollow fiber membranes with H</span>₂S included HC mixed-gas under realistic field conditions. The H₂S containing gas mixture used for this study was 5% CO₂, 21% H₂S, 15% C₂H₆, 10% C₃H₈ balanced with CH₄. The mixed-gas permeation tests were carried out with three temperatures, 15 °C, 25 °C, and 35 °C, and four pressures, 15 bar, 29 bar, 39 bar, and 46 bar. The permeate header pressure is 1.013 bar (atmospheric pressure). H₂S mixed-gas permeation was increased with increasing feed pressure. At the lower feed pressure between 15 bar and 30 bar, the H₂S/HCs selectivity were essentially stable. However, the selectivity is drastically decreased at the feed pressure of 30 bar and higher. The high condensability and solubility of H₂S at the pressure higher than 30 bar would increase a mobility of the CTA polymer chain segments dramatically.</p></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"681 ","pages":"Article 121734"},"PeriodicalIF":9.5,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1596566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"COF-based nanofiltration membrane for effective treatment of wastewater containing pharmaceutical residues","authors":"Kornkamol Banjerdteerakul,&nbsp;Hao Peng,&nbsp;Kang Li","doi":"10.1016/j.memsci.2023.121780","DOIUrl":"https://doi.org/10.1016/j.memsci.2023.121780","url":null,"abstract":"<div><p>Nanofiltration has been identified as an effective method for removing emerging pharmaceuticals from wastewater with potential to mitigate environmental impacts and improve water quality. However, the low separation efficiency from the current nanofiltration membranes impeded their development. Here, using the vacuum-assisted self-assembly method, we prepared a thin film composite membrane by stacking covalent organic framework (COF) nanosheets on a predesigned ceramic hollow fibre. By adding methanol as the co-solvent for the assembly, a continuous and defect-free COF TpPa-SO₃H layer was formed on top of the YSZ hollow fibre. The resultant COF composite membrane showed high rejection for five environmentally persistent pharmaceuticals (i.e., diclofenac, sulfamethoxazole, ketoprofen, naproxen, and ibuprofen). The hydrophilic pore surface and strong keto-amine linkages of the COF ensured high and stable permeation during operation with separation governed by electrostatic repulsion and steric exclusion. Due to our design using ceramic hollow fibres, these membranes have a small footprint and can be easily integrated into existing water treatment systems. These features make COF-based nanofiltration membranes a promising option for mitigating the environmental impacts of emerging pharmaceuticals in wastewater.</p></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"681 ","pages":"Article 121780"},"PeriodicalIF":9.5,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1696213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}