Article
Engineering, Chemical
Thomas Vroman, Francois Beaume, Valentine Armanges, Emilie Gout, Jean-Christophe Remigy
Summary: Optimizing backwash conditions can reduce energy and water consumption. Critical backwash flux and inter cake-membrane pressure are key factors in efficient fouling removal, independent of membrane properties.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Environmental
Jiaxi Jiang, Sherub Phuntsho, Nirenkumar Pathak, Qilin Wang, Jaeweon Cho, Ho Kyong Shon
Summary: Membrane fouling is a major challenge in membrane technology operation, and this study focuses on the relationship between membrane fouling and nitrifying bacteria activity. By adjusting ammonia concentration and optimizing operational conditions, efficient nitrification reaction was achieved, along with recommendations to mitigate membrane fouling.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Environmental
Wanying Xie, Ji Li, Feiyun Sun, Wenyi Dong, Zijun Dong
Summary: By using a novel integrated strategy of hydrophilic membrane modification and low-pressure operation, the permeability and anti-fouling ability of PVDF membrane were improved. The concepts of critical flux (J(C)) and threshold flux (J(TH)) were recommended as fouling-control tools, resulting in effectively reducing irreversible fouling and controlling reversible fouling. The enhancement of J(C) and J(TH) is believed to be mainly related to the better hydrophilicity and local hydraulic condition of the PVDF-TiO2 modified membrane.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Murielle Rabiller-Baudry, Patrick Loulergue, Jean Girard, Massoud El Mansour El Jastimi, Aurelie Bouzin, Marie Le Gallic, Alain Moreac, Philippe Rabiller
Summary: The study indicates that the resistance and residual irreversible fouling of the membrane in skim milk ultrafiltration are significantly influenced by the chlorine dose received during the membrane's service life, highlighting the importance of managing this factor at an industrial scale.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Environmental
Aleksandra Chuda, Krzysztof Zieminski
Summary: This study investigates the ultrafiltration performance of sugar beet pulp digestate with different pre-treatment strategies. High ultrafiltration performance was obtained using centrifugation and polyacrylamide flocculation as digestate pre-treatment. The results indicate the possibility of filtering the liquid fraction obtained by centrifugation, coagulation or flocculation of the digestate, and using natural auxiliary agents during its pre-treatment.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Mohammad T. Alresheedi, Seyedeh Laleh D. Kenari, Benoit Barbeau, Onita D. Basu
Summary: This study demonstrates the potential for significant fouling control on an UF membrane by alternating the stress on the membrane surface through flux modulation. By modulating the flux, the fouling index values can be decreased while maintaining membrane productivity.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Qian Gao, Hailu Demissie, Sen Lu, Zhizhen Xu, Tharindu Ritigala, Sun Yingying, Wei Yang, Dongsheng Wang, Hui Xu
Summary: This study evaluates the impact of in situ formed inorganic-organic polymer composite coagulant (IPCC) on humic acid (HA) and bovine serum albumin (BSA) rich water treatment using cationic poly(diallyldimethylammonium) chloride (pDADMAC) of different molecular weights. Results show that IPCC effectively mitigated membrane fouling and improved permeate quality, depending on the polymer composition.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Nurshaun Sreedhar, Musthafa O. Mavukkandy, Tejraj M. Aminabhavi, Seungkwan Hong, Hassan A. Arafat
Summary: This study systematically investigates the impact of feed spacer design on membrane fouling mechanism in ultrafiltration process. Experimental crossflow UF experiments were conducted using dextran and sodium alginate in different spacer geometries. The results show that spacer design significantly affects the fouling mechanism in UF separation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Yinghua Li, Yiyan Wang, Mengxi Liao, Fei Su, Yue Zhang, Linlin Peng
Summary: The electroflocculation/oxidation pre-treatment method can effectively reduce membrane pollution caused by natural organic matter and improve membrane permeation flux. This pre-treatment process enhances the irreversible fouling resistance of membrane pores.
WATER SCIENCE AND TECHNOLOGY
(2022)
Article
Environmental Sciences
Yujiao Li, Zhaoheng Zhang, Yikan Zhao, Yuting Han, Lanxin Ren, Yingxue Sun
Summary: Micro-flocculation and ozone as pretreatments of ultrafiltration have significant effects on the removal of organic matters and membrane flux. Micro-flocculation improves DOC removal efficiency but negatively impacts membrane flux. Ozone pretreatment enhances membrane specific flux but introduces dissolved organic matters hindering DOC removal. Both micro-flocculation and ozone can improve specific flux for HA simulated water, but micro-flocculation exhibits better DOC removal by avoiding the introduction of additional organic matters.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Jinchuan Lian, Xiaoxiang Cheng, Xuewu Zhu, Xinsheng Luo, Jingtao Xu, Fengxun Tan, Daoji Wu, Heng Liang
Summary: In this study, ferrate (Fe(VI)) and calcium sulfite (CaSO3) were combined to improve ultrafiltration (UF) performance in surface water treatment. The combination of Fe(VI) and CaSO3 generated various active species, effectively eliminating fluorescent components. Dissolved organic carbon and UV254 were significantly reduced with Fe(VI)/CaSO3 = 0.05/0.15 mM. After UF, the removal rate for these parameters were further improved. The UF stage also resulted in reduced fouling and improved membrane performance.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Jingyi Li, Bodong Wang, Zhihao Chen, Baiwen Ma, J. Paul Chen
Summary: The study found that the fouling of ultrafiltration (UF) membrane was enhanced by the synergistic effect of MPs and substances in raw water, with the most severe fouling caused by 1μm-sized MPs. Al-flocs injection and membrane module rotation were effective in reducing fouling, with computational fluid dynamics (CFD) modeling showing regulation of flow during rotation.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Polymer Science
Rongle Xu, Yaobo Fan, Min Yang, Jinqiu Song
Summary: A long-term membrane resistance model was developed and simulated polymer film fouling successfully in a lab-scale membrane bioreactor (MBR). The model effectively decomposed the total fouling resistance into individual components and simulated the fouling phenomenon at different fluxes and temperatures. The relationship between flux and operation time was analyzed and a sustainable critical flux value was proposed. This study provides practical information for designing MBRs and improving the efficiency of polymer film modules.
Article
Engineering, Environmental
Junwen Ding, Jinlong Wang, Xinsheng Luo, Daliang Xu, Yatao Liu, Peijie Li, Shirong Li, Rui Wu, Xinlei Gao, Heng Liang
Summary: This study proposed a novel strategy for controlling membrane fouling in continuous oily wastewater purification, which combined passive and active methods to reduce fouling. The addition of delta-MnO2 decoration layer and catalytic cleaning effectively improved the surface properties of the membrane, resulting in high water permeation flux and durable anti-oil-fouling performance. The membrane also showed high cleaning efficiency in the peroxymonosulfate (PMS) cleaning process.
Article
Engineering, Environmental
Yoonkyung Lee, Teayoep Kim, Bumsoo Kim, Sun Choi, Kyunghoon Kim
Summary: In this study, we synthesized amorphous MoSx (a-MoSx) and Ag on TiO2 to improve the removal of photocatalytic organic pollutants. The TiO2/a-MoSx/Ag (TMA) photocatalyst showed significantly enhanced degradation performance of methylene blue compared to TiO2 photocatalyst. Moreover, by coating the TMA photocatalyst on an ultrafiltration (UF) membrane using polydopamine (PDA), fouling of the membrane was successfully mitigated, resulting in increased hydrophilicity and improved flux recovery ratio.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Chemical
Omkar D. Supekar, Danielle J. Park, Alan R. Greenberg, Juliet T. Gopinath, Victor M. Bright
JOURNAL OF MEMBRANE SCIENCE
(2020)
Article
Engineering, Chemical
Masoud Aghajani, Alan R. Greenberg, Yifu Ding
JOURNAL OF MEMBRANE SCIENCE
(2020)
Article
Materials Science, Coatings & Films
Brian C. Welch, Olivia M. McIntee, Anand B. Ode, Bonnie B. McKenzie, Alan R. Greenberg, Victor M. Bright, Steven M. George
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2020)
Article
Engineering, Chemical
Danielle J. Park, Omkar D. Supekar, Alan R. Greenberg, Juliet T. Gopinath, Victor M. Bright
Summary: Chemical characterization and real-time monitoring of scaling and removal processes in a bench-scale RO system were conducted using Raman spectroscopy. The results showed that changes in Raman intensity were a more sensitive indicator of scale removal on the membrane surface, providing crucial chemical composition and spatial distribution information.
Article
Polymer Science
Adrienne K. Blevins, Lewis M. Cox, Leiqing Hu, Jasper A. Drisko, Haiqing Lin, Christopher N. Bowman, Jason P. Killgore, Yifu Ding
Summary: The study investigated the effects of pattern geometry on CO2 permeability and mechanical properties by controlling line and square patterns through photopatterning. It was found that materials with lower cross-linking density in 10 μm square patterns exhibited synergistically enhanced barrier properties.
Article
Chemistry, Multidisciplinary
Lingxiang Zhu, Liang Huang, Surendar R. Venna, Adrienne K. Blevins, Yifu Ding, David P. Hopkinson, Mark T. Swihart, Haiqing Lin
Summary: By rapidly fabricating ultrathin silica-like membranes at 20 degrees C, excellent H-2/CO2 separation properties can be achieved, showing great potential for economic hydrogen production and minimal carbon emissions.
Article
Engineering, Chemical
Gengyi Zhang, Thien N. N. Tran, Liang Huang, Erda Deng, Adrienne Blevins, Wenji Guo, Yifu Ding, Haiqing Lin
Summary: Cross-linked amorphous poly(ethylene oxide) (XLPEO) is a leading membrane material for post-combustion CO2 capture. In this study, high molecular weight yet soluble HPEO was synthesized via atom transfer radical polymerization (ATRP) and fabricated into defect-free thin-film composite (TFC) membranes with excellent performance. The membranes showed stable CO2 permeance and CO2/N-2 selectivity under simulated challenge.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Polymer Science
Liang Huang, Wenji Guo, Himangshu Mondal, Skye Schaefer, Thien N. Tran, Shouhong Fan, Yifu Ding, Haiqing Lin
Summary: Amorphous PDXL-based hyperbranched polymers with varied branch length show attractive CO2/N-2 and CO2/CH4 separation properties.
Article
Multidisciplinary Sciences
Leiqing Hu, Vinh T. Bui, Ajay Krishnamurthy, Shouhong Fan, Wenji Guo, Sankhajit Pal, Xiaoyi Chen, Gengyi Zhang, Yifu Ding, Rajinder P. Singh, Monica Lupion, Haiqing Lin
Summary: By doping polymers with thermolabile cross-linkers before low-temperature carbonization, the processability of the polymers can be retained and superior hydrogen/carbon dioxide separation properties can be achieved.
Article
Polymer Science
Leiqing Hu, Shouhong Fan, Liang Huang, Vinh T. Bui, Thien Tran, Kaiwen Chen, Yifu Ding, Mark T. Swihart, Haiqing Lin
Summary: This study demonstrates a method to break the permeability/selectivity tradeoff using supramolecular polymer networks (SPNs) comprising polybenzimidazole (PBI) and dissociable metal salts. By coordinating metal ions and plasticizing with trifluoroacetate anions, the SPNs achieve higher fractional free volumes and lower d-spacing, resulting in increased H-2 permeability and H-2/CO2 selectivity. The SPNs also exhibit superior mechanical properties and stable performance in the presence of water vapor.
Article
Chemistry, Physical
Jared Beshai, Thomas DiSorbo, Jacob Hutfles, Jacob Segil, Richard F. ff Weir, John Pellegrino
Summary: This study presents the key characteristics of implementing cellulose acetate (CA) coatings on carbon cloth used as a fuel diffusion layer in aqueous fuel-fed cells, and demonstrates their functionality. The results show that these coatings enhance aqueous solution permeation and adhesion properties, leading to a two-fold increase in maximum power generation in alkaline DGFCs.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Leiqing Hu, Vinh T. Bui, Shouhong Fan, Wenji Guo, Sankhajit Pal, Yifu Ding, Haiqing Lin
Summary: This study demonstrates the formation of supramolecular assemblies by complexation between aromatic polycarboxylic acids and imidazoles, and shows their attractive H2/CO2 separation performance. It also investigates the correlation between the molar ratio of protons to polybenzimidazole repeating units and the performance, as well as the effect of temperature on selectivity.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Polymer Science
Adrienne K. Blevins, Mengyuan Wang, Michelle L. Lehmann, Leiqing Hu, Shouhong Fan, Christopher M. Stafford, Jason P. Killgore, Haiqing Lin, Tomonori Saito, Yifu Ding
Summary: This study demonstrates the ability to program heterogeneity in two stage reactive polymer networks (TSRP), and investigates the effect of this heterogeneity on CO2/N-2 selectivity. A novel TSRP formulation with poly(ethylene oxide) (PEO) and polydimethylsiloxane (PDMS) groups is designed, showing higher permeability, selectivity, and improved mechanical toughness compared to unpatterned materials. This highly customizable material system has the potential to simultaneously improve permselective performance and mechanical properties.
Article
Materials Science, Multidisciplinary
Kimberly K. Childress, Marvin D. Alim, Sudheendran Mavila, Vikina Martinez, Yifu Ding, Christopher N. Bowman, Jeffrey W. Stansbury
Summary: This study explores the potential of photopolymerizable thermoplastics and investigates the relationship between monomer structure and material properties. These materials exhibit rapid photopolymerization and distinctive mechanical properties, providing a basic framework for applications such as 3D printing.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Engineering, Chemical
Jiawei Hou, Shixuan Guo, Nigel Graham, Wenzheng Yu, Kening Sun, Ting Liu
Summary: A novel 2D composite membrane based on r-HGO and MXene materials was developed, demonstrating exceptional performance for water treatment in terms of permeability, pollutant rejection, and physical stability. The optimization of preparation conditions and material proportions can result in high water flux and efficient removal of pollutants.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Retraction
Engineering, Chemical
Chang Liu, Jinghong Liu, Liang Zhu, Shanfu Tang, Huixin Xiong
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Rui Gao, Caihong Liu, Andreia F. Faria, Qiang He, Chun Yang, Jun Ma
Summary: A novel copolymer architecture has been developed to address biofouling concerns in thin-film composite (TFC) membranes by integrating anti-fouling, bactericidal, and fouling-release functions. The multifunctional membrane demonstrates promising anti-adhesive properties, self-cleaning ability, and high flux recovery rate.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Alexander T. Bridge, Noah P. Wamble, Matthew S. Santoso, Joan F. Brennecke, Benny D. Freeman
Summary: This study demonstrates the reproducible preparation of high-flux defect-free asymmetric gas separation membranes using Cyrene(TM) as a majority dope formulation component. By adjusting the volume ratios of Cyrene(TM) and THF, as well as the concentrations of Matrimid(R) and the dry step time, optimal membrane performance is achieved.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Alessandra Imbrogno, Han Ya Lin, Babak Minofar, Andrea Iris Schaefer
Summary: In this study, a composite nanofiber membrane containing cross-linked beta-cyclodextrin-epichlorohydrin was prepared and evaluated for the removal of steroid hormones. The results showed that the membrane had high adsorption capacity and the ability to form a specific inclusion complex interaction with the hormones, indicating its potential application in hormone removal.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Bora Shin, Jaewon Shin, Yanuar Chandra Wirasembada, Ki Young Park, Jinwoo Cho
Summary: This study develops a mathematical model to estimate the initial flux of volatile fatty acids in the direct contact membrane distillation process. It identifies the parameters affecting the flux and their relationship with pH.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yi-Jui Yeh, Jr Rong Liou, Wei Lin, Kuo-Lun Tung, Wei-Hung Chiang
Summary: This study demonstrates an effective plasma engineering method to create nitrogen-doped graphene quantum dot (NGQD)-inorganic nanocomposites for tunable molecular separation. The composite materials show high separation efficiency and controllable nanopore structures, making them potentially valuable for various applications.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Horacio Lopez-Marques, Kristofer L. Gleason, Manuel Aguilar-Vega, Rita Sulub-Sulub, J. Ehren Eichler, Hyeonji Oh, C. Buddie Mullins, Benny D. Freeman, Manish Kumar
Summary: In this study, water transport properties in Carbon Molecular Sieve (CMS) membranes were investigated. It was found that membranes synthesized at different pyrolysis temperatures exhibited varying water permeabilities. Compared to other polymeric materials, CMS membranes showed high water permeability, indicating potential for dehydration applications.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Dmitry A. Alentiev, Roman Yu. Nikiforov, Marina A. Rudakova, Danil P. Zarezin, Maxim A. Topchiy, Andrey F. Asachenko, Nikolay A. Belov, Maxim Bermeshev
Summary: A series of new norbornene-type monomers containing linear and branched substituents were synthesized, and robust thin membranes were prepared by vinyl-addition polymerization. Gas separation performance for the synthesized polymers was evaluated, and the structure of substituent side chains was found to significantly affect gas permeability and CO2 facilitated transport.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Lei Yan, Qi Zhang, Ze Zhang, Gui-Jie Li, Yi Jin, Xin-Lin Zhang, Yan-Yun Sun
Summary: In this study, a continuous, stable and fast ion transport channel was established through in-situ guided cross-linking of zinc alginate hydrogels on a porous membrane, overcoming the negative pore effect and effectively inhibiting the dendrite growth of zinc anodes and interfacial side reactions.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yuqing Zhang, Ailing Zhang, Huiyang He, Yuting Fan, Yongjiang Li, Song Wang, Sanxi Li
Summary: The Langmuir-Blodgett self-assembly process is used to create an ordered SPEEK membrane, which enhances the proton conductivity by three times compared to conventional solution casting method.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Hasan Ismaeel, David Gibson, Eleonora Ricci, Maria Grazia De Angelis
Summary: In this study, a machine learning-based group contribution method (ML-GC) was developed to predict pure polymer parameters and successfully applied to predict gas solubility and gas solubility isotherms in glassy polymeric membranes. The model showed satisfactory performance on a small dataset, but has the potential to provide more accurate predictions for a wider range of polymers as more data becomes available.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yi Ji, Yu Sun, Huilin Li, Qiang Fu, Yan Zhang
Summary: Previous studies have shown that vibration- or rotation-based techniques can effectively mitigate fouling during membrane filtration. However, it is difficult to incorporate these techniques with spiral wound modules (SWMs) widely used in water and wastewater treatment. This study developed a prototype membrane system to accommodate angular vibrations with a modified SWM, and experimental results showed that applying angular vibrations can effectively control algal fouling in an SWM with lower energy consumption compared to traditional methods.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Lakshmeesha Upadhayaya, Abaynesh Yihdego Gebreyohannes, Muhammad Wakil Shahzad, Usman T. Syed, Sandra L. Aristizabal, Radoslaw Gorecki, Suzana P. Nunes
Summary: Increasing temperatures worldwide pose a significant health risk, exacerbated by high humidity. Conventional air conditioners contribute heavily to carbon dioxide emissions, with dehumidification being a major factor. Membrane-based dehumidification system offers energy efficiency and non-toxic water vapor removal. This study demonstrates a membrane dehumidification system with polymeric hollow fibers coated with a green polyphenol coating, showing remarkable water vapor transport rate and selectivity. Long-term testing reveals minimal decline in vapor transport and a 4-5 times higher coefficient of performance (COP) compared to conventional dehumidifiers, making it a highly competitive, energy-saving device with reduced emissions and a smaller footprint.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Zhengzhong Zhou, Xue Zhu, Yi Yuan, Shaoqiang Wang, Xiaoshan Meng, Taoli Huhe, Qian Wang
Summary: In this study, lignin, a biomass material, was chemically modified and utilized in the interfacial polymerization process to improve the performance of nanofiltration membranes. The modified membranes showed enhanced hydrophilicity and anti-fouling properties, and the optimization of membrane pore size increased permeability. The study also demonstrated the potential application of the membranes in biogas slurry valorization.
JOURNAL OF MEMBRANE SCIENCE
(2024)