1
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Liang S, Fu K, Li X, Wang Z. Unveiling the spatiotemporal dynamics of membrane fouling: A focused review on dynamic fouling characterization techniques and future perspectives. Adv Colloid Interface Sci 2024; 328:103179. [PMID: 38754212 DOI: 10.1016/j.cis.2024.103179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 03/12/2024] [Accepted: 05/03/2024] [Indexed: 05/18/2024]
Abstract
Membrane technology has emerged as a crucial method for obtaining clean water from unconventional sources in the face of water scarcity. It finds wide applications in wastewater treatment, advanced treatment, and desalination of seawater and brackish water. However, membrane fouling poses a huge challenge that limits the development of membrane-based water treatment technologies. Characterizing the dynamics of membrane fouling is crucial for understanding its development, mechanisms, and effective mitigation. Instrumental techniques that enable in situ or real-time characterization of the dynamics of membrane fouling provide insights into the temporal and spatial evolution of fouling, which play a crucial role in understanding the fouling mechanism and the formulation of membrane control strategies. This review consolidates existing knowledge about the principal advanced instrumental analysis technologies employed to characterize the dynamics of membrane fouling, in terms of membrane structure, morphology, and intermolecular forces. Working principles, applications, and limitations of each technique are discussed, enabling researchers to select appropriate methods for their specific studies. Furthermore, prospects for the future development of dynamic characterization techniques for membrane fouling are discussed, underscoring the need for continued research and innovation in this field to overcome the challenges posed by membrane fouling.
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Affiliation(s)
- Shuling Liang
- School of Environmental Science and Engineering, Shanghai Institute of Pollution Control and Ecological Security, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China
| | - Kunkun Fu
- School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China
| | - Xuesong Li
- School of Environmental Science and Engineering, Shanghai Institute of Pollution Control and Ecological Security, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China.
| | - Zhiwei Wang
- School of Environmental Science and Engineering, Shanghai Institute of Pollution Control and Ecological Security, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China
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2
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Kertész S, Gulyás NS, Al-Tayawi AN, Huszár G, Lennert JR, Csanádi J, Beszédes S, Hodúr C, Szabó T, László Z. Modeling of Organic Fouling in an Ultrafiltration Cell Using Different Three-Dimensional Printed Turbulence Promoters. MEMBRANES 2023; 13:membranes13030262. [PMID: 36984649 PMCID: PMC10056043 DOI: 10.3390/membranes13030262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/17/2023] [Accepted: 02/20/2023] [Indexed: 05/14/2023]
Abstract
Designing turbulence promoters with optimal geometry and using them for ultrafiltration systems has been a key challenge in mitigating membrane fouling. In this study, six different turbulence promoters were created using three-dimensional printing technology and applied in dead-end ultrafiltration. Three-dimensional-printed (3DP) turbulence promoter configurations were integrated into a classical batch ultrafiltration cell. The effects of these configurations and the stirring speeds on the permeate filtration flux, organic rejections, and membrane resistances were investigated. The fouling control efficiency of the 3DP promoters was evaluated using two polyethersulfone membranes in a stirred ultrafiltration cell with model dairy wastewater. The Hermia and resistance-in-series models were studied to further investigate the membrane fouling mechanism. Of the Hermia models, the cake layer model best described the fouling in this membrane filtration system. It can be concluded that the 3DP turbulence promoters, combined with intense mechanical stirring, show great promise in terms of permeate flux enhancement and membrane fouling mitigation. Using a well-designed 3DP turbulence promoter improves the hydrodynamic flow conditions on the surface of the stirred membrane separation cells based on computational fluid dynamics modeling. Therefore, the factors effecting the fabrication of 3DP turbulence promoters are important, and further research should be devoted to revealing them.
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Affiliation(s)
- Szabolcs Kertész
- Department of Biosystems Engineering, Faculty of Engineering, University of Szeged, Moszkvai krt. 9, H-6725 Szeged, Hungary
- Correspondence:
| | - Nikolett Sz. Gulyás
- Doctoral School of Environmental Sciences, University of Szeged, Tisza Lajos krt. 103, H-6725 Szeged, Hungary
| | - Aws N. Al-Tayawi
- Doctoral School of Environmental Sciences, University of Szeged, Tisza Lajos krt. 103, H-6725 Szeged, Hungary
- Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich Béla tér. 1, H-6720 Szeged, Hungary
| | - Gabriella Huszár
- Department of Biosystems Engineering, Faculty of Engineering, University of Szeged, Moszkvai krt. 9, H-6725 Szeged, Hungary
| | - József Richárd Lennert
- Faculty of Automotive Engineering, Széchenyi István University, Egyetem tér. 1, H-9026 Győr, Hungary
| | - József Csanádi
- Department of Food Engineering, Faculty of Engineering, University of Szeged, Moszkvai krt. 9, H-6725 Szeged, Hungary
| | - Sándor Beszédes
- Department of Biosystems Engineering, Faculty of Engineering, University of Szeged, Moszkvai krt. 9, H-6725 Szeged, Hungary
| | - Cecilia Hodúr
- Department of Biosystems Engineering, Faculty of Engineering, University of Szeged, Moszkvai krt. 9, H-6725 Szeged, Hungary
| | - Tamás Szabó
- Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich Béla tér. 1, H-6720 Szeged, Hungary
| | - Zsuzsanna László
- Department of Biosystems Engineering, Faculty of Engineering, University of Szeged, Moszkvai krt. 9, H-6725 Szeged, Hungary
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3
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Helical-Ridge-Membranes from PVDF for enhanced gas–liquid mass transfer. J Memb Sci 2023. [DOI: 10.1016/j.memsci.2023.121471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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4
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Chen Y, Cohen Y. Calcium Sulfate and Calcium Carbonate Scaling of Thin-Film Composite Polyamide Reverse Osmosis Membranes with Surface-Tethered Polyacrylic Acid Chains. MEMBRANES 2022; 12:1287. [PMID: 36557193 PMCID: PMC9783167 DOI: 10.3390/membranes12121287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/11/2022] [Accepted: 12/15/2022] [Indexed: 06/17/2023]
Abstract
The gypsum and calcite scaling propensities of the thin-film composite polyamide (PA-TFC) reverse osmosis (RO) membrane, modified with a tethered surface layer of polyacrylic acid (PAA) chains, was evaluated and compared to the scaling of selected commercial RO membranes. The tethered PAA layer was synthesized onto a commercial polyamide membrane (i.e., base-PA) via atmospheric pressure plasma-induced graft polymerization (APPIGP). The PAA nano-structured (SNS) base-PA membrane (SNS-PAA-PA) was scaled to a lesser degree, as quantified by a lower permeate flux decline and surface imaging, relative to the tested commercial membranes (Dow SW30, Toray SWRO, and BWRO). The cleaning of gypsum-scaled membranes with D.I. water flushing achieved 100% water permeability recovery for both the SNS-PAA-PA and Dow SW30 membranes, relative to 92-98% permeability restoration for the Toray membranes. The calcium carbonate scaling of SNS-PAA-PA membranes was also lower relative to the commercial membranes, but permeability recovery after D.I. water cleaning was somewhat lower (94%) but consistent with the level of surface scale coverage. In contrast, the calcite and gypsum-scaled membrane areas of the commercial membranes post-cleaning were significantly higher than for the SNS-PAA-PA membrane but with 100% permeability recovery, suggesting the potential for membrane damage when mineral scaling is severe.
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Affiliation(s)
- Yian Chen
- Water Technology Research Center, Department of Chemical and Biomolecular Engineering, Henry Samueli School of Engineering and Applied Science, University of California, Los Angeles, CA 90095, USA
- Renewable Resources & Enabling Science Center, National Renewable Energy Laboratory, Golden, CO 80401, USA
| | - Yoram Cohen
- Water Technology Research Center, Department of Chemical and Biomolecular Engineering, Henry Samueli School of Engineering and Applied Science, University of California, Los Angeles, CA 90095, USA
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5
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Cao Z, Hu Y, Zhao H, Cao B, Zhang P. Sulfate mineral scaling: From fundamental mechanisms to control strategies. WATER RESEARCH 2022; 222:118945. [PMID: 35963137 DOI: 10.1016/j.watres.2022.118945] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 08/02/2022] [Accepted: 08/03/2022] [Indexed: 06/15/2023]
Abstract
Sulfate scaling, as insoluble inorganic sulfate deposits, can cause serious operational problems in various industries, such as blockage of membrane pores and subsurface media and impairment of equipment functionality. There is limited article to bridge sulfate formation mechanisms with field scaling control practice. This article reviews the molecular-level interfacial reactions and thermodynamic basis controlling homogeneous and heterogeneous sulfate mineral nucleation and growth through classical and non-classical pathways. Common sulfate scaling control strategies were also reviewed, including pretreatment, chemical inhibition and surface modification. Furthermore, efforts were made to link the fundamental theories with industrial scale control practices. Effects of common inhibitors on different steps of sulfate formation pathways (i.e., ion pair and cluster formation, nucleation, and growth) were thoroughly discussed. Surface modifications to industrial facilities and membrane units were clarified as controlling either the deposition of homogeneous precipitates or the heterogeneous nucleation. Future research directions in terms of optimizing sulfate chemical inhibitor design and improving surface modifications are also discussed. This article aims to keep the readers abreast of the latest development in mechanistic understanding and control strategies of sulfate scale formation and to bridge knowledge developed in interfacial chemistry with engineering practice.
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Affiliation(s)
- Zhiqian Cao
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China; Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Taipa, Macau SAR
| | - Yandi Hu
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.
| | - Huazhang Zhao
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Bo Cao
- KIT Professionals, Inc., Houston, TX, USA
| | - Ping Zhang
- Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Taipa, Macau SAR.
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6
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Rotating microstructured spinnerets produce helical ridge membranes to overcome mass transfer limitations. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2021.119988] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Sharma A, Jung SH, Lomadze N, Pich A, Santer S, Bekir M. Adsorption Kinetics of a Photosensitive Surfactant Inside Microgels. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01994] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Anjali Sharma
- Institute of Physics and Astronomy, University of Potsdam, 14476 Potsdam, Germany
| | - Se-Hyeong Jung
- DWI-Leibniz Institute for Interactive Materials e.V., 52074 Aachen, Germany
- Functional and Interactive Polymers, Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, 52074 Aachen, Germany
| | - Nino Lomadze
- Institute of Physics and Astronomy, University of Potsdam, 14476 Potsdam, Germany
| | - Andrij Pich
- DWI-Leibniz Institute for Interactive Materials e.V., 52074 Aachen, Germany
- Functional and Interactive Polymers, Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, 52074 Aachen, Germany
- Aachen Maastricht Institute for Biobased Materials (AMIBM), Maastricht University, 6167 RD Geleen, The Netherlands
| | - Svetlana Santer
- Institute of Physics and Astronomy, University of Potsdam, 14476 Potsdam, Germany
| | - Marek Bekir
- Institute of Physics and Astronomy, University of Potsdam, 14476 Potsdam, Germany
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8
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Baitalow K, Wypysek D, Leuthold M, Weisshaar S, Lölsberg J, Wessling M. A mini-module with built-in spacers for high-throughput ultrafiltration. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2021.119602] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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9
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Büning D, Schumacher J, Helling A, Chakroun R, Ennen-Roth F, Gröschel AH, Thom V, Ulbricht M. Soft synthetic microgels as mimics of mycoplasma. SOFT MATTER 2021; 17:6445-6460. [PMID: 34132722 DOI: 10.1039/d1sm00379h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Artificial model colloids are of special interest in the development of advanced sterile filters, as they are able to efficiently separate pleomorphic, highly deformable and infectious bacteria such as mycoplasma, which, until now, has been considered rather challenging and laborious. This study presents a full range of different soft to super soft synthetic polymeric microgels, including two types with similar hydrodynamic mean diameter, i.e., 180 nm, and zeta potential, i.e., -25 ± 10 mV, but different deformability, synthesized by inverse miniemulsion terpolymerization of acrylamide, sodium acrylate and N,N'-methylenebisacrylamide. These microgels were characterized by means of dynamic, electrophoretic and static light scattering techniques. In addition, the deformability of the colloids was investigated by filter cake compressibility studies during ultrafiltration in dead-end mode, analogously to a study of real mycoplasma, i.e., Acholeplasma laidlawii, to allow for a direct comparison. The results indicate that the variation of the synthesis parameters, i.e., crosslinker content, polymeric solid content and content of sodium acrylate, has a significant impact on the swelling behavior of the microgels in aqueous solution as well as on their deformability under filtration conditions. A higher density of chemical crosslinking points results in less swollen and more rigid microgels. Furthermore, these parameters determine electrokinetic properties of the more or less permeable colloids. Overall, it is shown that these soft synthetic microgels can be obtained with tailor-made properties, covering the size of smallest species of and otherwise similar to real mycoplasma. This is a relevant first step towards the future use of synthetic microgels as mimics for mycoplasma.
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Affiliation(s)
- Dominic Büning
- Lehrstuhl für Technische Chemie II, Universität Duisburg-Essen, 45117 Essen, Germany.
| | - Jens Schumacher
- Lehrstuhl für Technische Chemie II, Universität Duisburg-Essen, 45117 Essen, Germany.
| | - Alexander Helling
- Sartorius Stedim Biotech GmbH, August-Spindler-Straße 11, 37079 Göttingen, Germany
| | - Ramzi Chakroun
- Institute of Physical Chemistry, University of Münster, Corrensstr. 28-30, 48149 Münster, Germany
| | - Franka Ennen-Roth
- Lehrstuhl für Technische Chemie II, Universität Duisburg-Essen, 45117 Essen, Germany.
| | - Andre H Gröschel
- Institute of Physical Chemistry, University of Münster, Corrensstr. 28-30, 48149 Münster, Germany
| | - Volkmar Thom
- Sartorius Stedim Biotech GmbH, August-Spindler-Straße 11, 37079 Göttingen, Germany
| | - Mathias Ulbricht
- Lehrstuhl für Technische Chemie II, Universität Duisburg-Essen, 45117 Essen, Germany.
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10
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Compressed sensing MRI to characterize sodium alginate deposits during cross-flow filtration in membranes with a helical ridge. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2021.119170] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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11
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In-situ investigation of wetting patterns in polymeric multibore membranes via magnetic resonance imaging. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2020.119026] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Lüken A, Linkhorst J, Fröhlingsdorf R, Lippert L, Rommel D, De Laporte L, Wessling M. Unravelling colloid filter cake motions in membrane cleaning procedures. Sci Rep 2020; 10:20043. [PMID: 33208808 PMCID: PMC7674421 DOI: 10.1038/s41598-020-76970-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 10/30/2020] [Indexed: 11/08/2022] Open
Abstract
The filtration performance of soft colloid suspensions suffers from the agglomeration of the colloids on the membrane surface as filter cakes. Backflushing of fluid through the membrane and cross-flow flushing across the membrane are widely used methods to temporally remove the filter cake and restore the flux through the membrane. However, the phenomena occurring during the recovery of the filtration performance are not yet fully described. In this study, we filtrate poly(N-isopropylacrylamide) microgels and analyze the filter cake in terms of its composition and its dynamic mobility during removal using on-line laser scanning confocal microscopy. First, we observe uniform cake build-up that displays highly ordered and amorphous regions in the cake layer. Second, backflushing removes the cake in coherent pieces and their sizes depend on the previous cake build-up. And third, cross-flow flushing along the cake induces a pattern of longitudinal ridges on the cake surface, which depends on the cross-flow velocity and accelerates cake removal. These observations give insight into soft colloid filter cake arrangement and reveal the cake's unique behaviour exposed to shear-stress.
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Affiliation(s)
- Arne Lüken
- RWTH Aachen University, AVT - Chemical Process Engineering, Forckenbeckstraße 51, 52074, Aachen, Germany
| | - John Linkhorst
- RWTH Aachen University, AVT - Chemical Process Engineering, Forckenbeckstraße 51, 52074, Aachen, Germany
| | - Robin Fröhlingsdorf
- RWTH Aachen University, AVT - Chemical Process Engineering, Forckenbeckstraße 51, 52074, Aachen, Germany
| | - Laura Lippert
- RWTH Aachen University, AVT - Chemical Process Engineering, Forckenbeckstraße 51, 52074, Aachen, Germany
| | - Dirk Rommel
- DWI - Leibniz Institute for Interactive Materials, Forckenbeckstraße 50, 52074, Aachen, Germany
| | - Laura De Laporte
- DWI - Leibniz Institute for Interactive Materials, Forckenbeckstraße 50, 52074, Aachen, Germany
- RWTH Aachen University, ITMC - Polymeric Biomaterials, Forckenbeckstraße 50, 52074, Aachen, Germany
- RWTH Aachen University, AME - Advanced Materials for Biomedicine, Forckenbeckstraße 55, 52074, Aachen, Germany
| | - Matthias Wessling
- RWTH Aachen University, AVT - Chemical Process Engineering, Forckenbeckstraße 51, 52074, Aachen, Germany.
- DWI - Leibniz Institute for Interactive Materials, Forckenbeckstraße 50, 52074, Aachen, Germany.
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13
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Lohaus T, Beck J, Harhues T, de Wit P, Benes NE, Wessling M. Direct membrane heating for temperature induced fouling prevention. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2020.118431] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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14
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Lee H, Segets D, Süß S, Peukert W, Chen SC, Pui DY. Effects of filter structure, flow velocity, particle concentration and fouling on the retention efficiency of ultrafiltration for sub-20 nm gold nanoparticles. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.116689] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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15
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Kharraz JA, Farid MU, Khanzada NK, Deka BJ, Arafat HA, An AK. Macro-corrugated and nano-patterned hierarchically structured superomniphobic membrane for treatment of low surface tension oily wastewater by membrane distillation. WATER RESEARCH 2020; 174:115600. [PMID: 32088385 DOI: 10.1016/j.watres.2020.115600] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 02/06/2020] [Accepted: 02/07/2020] [Indexed: 06/10/2023]
Abstract
A hierarchically assembled superomniphobic membrane with three levels of reentrant structure was designed and fabricated to enable effective treatment of low surface tension, hypersaline oily wastewaters using direct contact membrane distillation (DCMD). The overall structure is a combination of macro corrugations obtained by surface imprinting, with the micro spherulites morphology achieved through the applied phase inversion method and nano patterns obtained by fluorinated Silica nanoparticles (SiNPs) coating. This resulted in a superomniphobic membrane surface with remarkable anti-wetting properties repelling both high surface tension water and low surface tension oils. Measurements of contact angle (CA) with DI water, an anionic surfactant, oil, and ethanol demonstrated a robust wetting resistance against low surface tension liquids showing both superhydrophobicity and superoleophobicity. CA values of 160.8 ± 2.3° and 154.3 ± 1.9° for water and oil were obtained, respectively. Calculations revealed a high liquid-vapor interface for the fabricated membrane with more than 89% of the water droplet contact area being with air pockets entrapped between adjacent SiNPs and only 11% come into contact with the solid membrane surface. Moreover, the high liquid-vapor interface imparts the membrane with high liquid repellency, self-cleaning and slippery effects, characterized by a minimum droplet-membrane interaction and complete water droplet bouncing on the surface within only 18 ms. When tested in DCMD with synthetic hypersaline oily wastewaters, the fabricated superomniphobic membrane demonstrated stable, non-wetting MD operation over 24 h, even at high concentrations of low surface tension 1.0 mM Sodium dodecyl sulfate and 400 ppm oil, potentially offering a sustainable option for treatment of low surface tension oily industrial wastewater.
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Affiliation(s)
- Jehad A Kharraz
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region
| | - Muhammad Usman Farid
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region
| | - Noman Khalid Khanzada
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region
| | - Bhaskar Jyoti Deka
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region
| | - Hassan A Arafat
- Center for Membrane and Advanced Water Technology, Khalifa University, Abu Dhabi, United Arab Emirates
| | - Alicia Kyoungjin An
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region.
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16
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Purohit A, Centeno SP, Wypysek SK, Richtering W, Wöll D. Microgel PAINT - nanoscopic polarity imaging of adaptive microgels without covalent labelling. Chem Sci 2019; 10:10336-10342. [PMID: 32110321 PMCID: PMC6984396 DOI: 10.1039/c9sc03373d] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 09/16/2019] [Indexed: 12/13/2022] Open
Abstract
Polymer nanostructures have enormous potential for various applications in materials and life sciences. In order to exploit and understand their full capabilities, a detailed analysis of their structures and the environmental conditions in them is essential on the nanoscopic scale. With a super-resolution fluorescence microscopy technique known as PAINT (Points Accumulation for Imaging in Nanoscale Topography), we imaged colloidal hydrogel networks, so-called microgels, having a hydrodynamic radius smaller than the diffraction limit, gaining unprecedented insight into their full 3D structure which is not accessible in this much detail with any other experimental method. In addition to imaging of the microgel structure, the use of Nile Red as the solvatochromic fluorophore allowed us to resolve the polarity conditions within the investigated microgels, thus providing nanoscopic information on the x,y,z-position of labels including their polarity without the need of covalent labelling. With this imaging approach, we give a detailed insight into adapting structural and polarity properties of temperature-responsive microgels when changing the temperature beyond the volume phase transition.
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Affiliation(s)
- Ashvini Purohit
- Institute of Physical Chemistry , RWTH Aachen University , Landoltweg 2 , 52074 Aachen , Germany .
| | - Silvia P Centeno
- Institute of Physical Chemistry , RWTH Aachen University , Landoltweg 2 , 52074 Aachen , Germany .
| | - Sarah K Wypysek
- Institute of Physical Chemistry , RWTH Aachen University , Landoltweg 2 , 52074 Aachen , Germany .
| | - Walter Richtering
- Institute of Physical Chemistry , RWTH Aachen University , Landoltweg 2 , 52074 Aachen , Germany .
| | - Dominik Wöll
- Institute of Physical Chemistry , RWTH Aachen University , Landoltweg 2 , 52074 Aachen , Germany .
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17
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Charged microgels adsorbed on porous membranes - A study of their mobility and molecular retention. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2019.117190] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Jokić A, Pajčin I, Grahovac J, Lukić N, Dodić J, Rončević Z, Šereš Z. Energy efficient turbulence promoter flux-enhanced microfiltration for the harvesting of rod-shaped bacteria using tubular ceramic membrane. Chem Eng Res Des 2019. [DOI: 10.1016/j.cherd.2019.08.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Koupaei AM, Nazaripoor H, Sadrzadeh M. Electrohydrodynamic Patterning of Polyethersulfone Membranes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:12139-12149. [PMID: 31419149 DOI: 10.1021/acs.langmuir.9b01948] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Microstructuring the surface of membranes is recognized as one of the effective strategies to mitigate the fouling phenomenon. Over the years, significant efforts have been undertaken to develop new techniques for altering the membrane surface topography at the micro- and nanoscale. However, all the previously suggested approaches suffer from some serious drawbacks that impede their widespread implementations, including cost, time, and cumbersomeness. In this study, we show that the electrohydrodynamic (EHD) patterning process can be successfully adopted to form surface patterns on polyethersulfone (PES) microfiltration membranes. The linear stability analysis and nonlinear numerical simulation are performed to theoretically predict the size of the created raised columnar structure (often called pillars). In contrast to the conventional EHD patterning process, the developed method works at room temperature and nonsolvent-induced phase separation is used to solidify the formed structures. An array of pillars was formed on the membrane surface, whose height and width were found to be as low as 31 ± 5 and 98 ± 12 μm, respectively. It is demonstrated that fabricating surface-patterned PES membranes does not require sophisticated facilities and precise control of process condition using this simple moldless method.
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Affiliation(s)
- Ali Malekpour Koupaei
- Department of Mechanical Engineering, 10-367 Donadeo Innovation Center for Engineering, Advanced Water Research Lab (AWRL) , University of Alberta , Edmonton , Alberta T6G 1H9 , Canada
| | - Hadi Nazaripoor
- Department of Mechanical Engineering, 10-367 Donadeo Innovation Center for Engineering, Advanced Water Research Lab (AWRL) , University of Alberta , Edmonton , Alberta T6G 1H9 , Canada
| | - Mohtada Sadrzadeh
- Department of Mechanical Engineering, 10-367 Donadeo Innovation Center for Engineering, Advanced Water Research Lab (AWRL) , University of Alberta , Edmonton , Alberta T6G 1H9 , Canada
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20
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Wypysek D, Rall D, Wiese M, Neef T, Koops GH, Wessling M. Shell and lumen side flow and pressure communication during permeation and filtration in a multibore polymer membrane module. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2019.04.070] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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21
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Roth H, Alders M, Luelf T, Emonds S, Tepper M, Wessling M. Direktes Herstellungsverfahren von Komposit‐Hohlfasermembranen mit sinusförmiger Geometrie. CHEM-ING-TECH 2019. [DOI: 10.1002/cite.201900032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hannah Roth
- DWI – Leibniz-Institut für Interaktive Materialien e.V. Forckenbeckstraße 50 52074 Aachen Deutschland
- Rheinisch-Westfälische Technische Hochschule AachenChemische Verfahrenstechnik AVT.CVT Forckenbeckstraße 51 52074 Aachen Deutschland
| | - Michael Alders
- Rheinisch-Westfälische Technische Hochschule AachenChemische Verfahrenstechnik AVT.CVT Forckenbeckstraße 51 52074 Aachen Deutschland
| | - Tobias Luelf
- DWI – Leibniz-Institut für Interaktive Materialien e.V. Forckenbeckstraße 50 52074 Aachen Deutschland
- Rheinisch-Westfälische Technische Hochschule AachenChemische Verfahrenstechnik AVT.CVT Forckenbeckstraße 51 52074 Aachen Deutschland
| | - Stephan Emonds
- DWI – Leibniz-Institut für Interaktive Materialien e.V. Forckenbeckstraße 50 52074 Aachen Deutschland
- Rheinisch-Westfälische Technische Hochschule AachenChemische Verfahrenstechnik AVT.CVT Forckenbeckstraße 51 52074 Aachen Deutschland
| | - Maik Tepper
- DWI – Leibniz-Institut für Interaktive Materialien e.V. Forckenbeckstraße 50 52074 Aachen Deutschland
- Rheinisch-Westfälische Technische Hochschule AachenChemische Verfahrenstechnik AVT.CVT Forckenbeckstraße 51 52074 Aachen Deutschland
| | - Matthias Wessling
- DWI – Leibniz-Institut für Interaktive Materialien e.V. Forckenbeckstraße 50 52074 Aachen Deutschland
- Rheinisch-Westfälische Technische Hochschule AachenChemische Verfahrenstechnik AVT.CVT Forckenbeckstraße 51 52074 Aachen Deutschland
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22
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Luelf T, Rall D, Wypysek D, Wiese M, Femmer T, Bremer C, Michaelis JU, Wessling M. 3D-printed rotating spinnerets create membranes with a twist. J Memb Sci 2018. [DOI: 10.1016/j.memsci.2018.03.026] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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