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Singh E, Kumar A, Lo SL. Advancing nanobubble technology for carbon-neutral water treatment and enhanced environmental sustainability. ENVIRONMENTAL RESEARCH 2024; 252:118980. [PMID: 38657850 DOI: 10.1016/j.envres.2024.118980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2024] [Revised: 04/02/2024] [Accepted: 04/20/2024] [Indexed: 04/26/2024]
Abstract
Gaseous nanobubbles (NBs) with dimensions ranging from 1 to 1000 nm in the liquid phase have garnered significant interest due to their unique physicochemical characteristics, including specific surface area, low internal gas pressure, long-term stability, efficient mass transfer, interface potential, and free radical production. These remarkable properties have sparked considerable attention in the scientific community and industries alike. These hold immense promise for environmental applications, especially for carbon-neutral water remediation. Their long-lasting stability in aqueous systems and efficient mass transfer properties make them highly suitable for delivering gases in the vicinity of pollutants. This potential has prompted research into the use of NBs for targeted delivery of gases in contaminated water bodies, facilitating the degradation of harmful substances and advancing sustainable remediation practices. However, despite significant progress in understanding NBs physicochemical properties and potential applications, several challenges and knowledge gaps persist. This review thereby aims to summarize the current state of research on NBs environmental applications and potential for remediation. By discussing the generation processes, mechanisms, principles, and characterization techniques, it sheds light on the promising future of NBs in advancing environmental sustainability. It explores their role in improving oxygenation, aeration, and pollutant degradation in water systems. Finally, the review addresses future research perspectives, emphasizing the need to bridge knowledge gaps and overcome challenges to unlock the full potential of this frontier technology for enhanced environmental sustainability.
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Affiliation(s)
- Ekta Singh
- Graduate Institute of Environmental Engineering, National Taiwan University, 71 Chuo-Shan Rd., Taipei, 10673, Taiwan
| | - Aman Kumar
- Graduate Institute of Environmental Engineering, National Taiwan University, 71 Chuo-Shan Rd., Taipei, 10673, Taiwan
| | - Shang-Lien Lo
- Graduate Institute of Environmental Engineering, National Taiwan University, 71 Chuo-Shan Rd., Taipei, 10673, Taiwan; Water Innovation, Low Carbon and Environmental Sustainability Research Center, National Taiwan University, Taipei, 10617, Taiwan; Science and Technology Research Institute for DE-Carbonization (STRIDE-C), National Taiwan University, Taipei, 10617, Taiwan.
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2
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Hoehn BD, Kellstedt EA, Hillmyer MA. Tough polycyclooctene nanoporous membranes from etchable block copolymers. SOFT MATTER 2024; 20:437-448. [PMID: 38112234 DOI: 10.1039/d3sm01498c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
Porous materials with pore dimensions of the nanometer length scale are useful as nanoporous membranes. ABA triblock copolymers are convenient precursors to such nanoporous materials if the end blocks are easily degradable (e.g., polylactide or PLA), leaving nanoporous polymeric membranes (NPMs) if in thin film form. The membrane properties are dependent on midblock monomer structure, triblock copolymer composition, overall molar mass, and polymer processing conditions. Polycyclooctene (PCOE) NPMs were prepared using this method, with tunable pore sizes on the order of tens of nanometers. Solvent casting was shown to eliminate film defects and allowed achievement of superior mechanical properties over melt processing techniques, and PCOE NPMs were found to be very tough, a major advance over previously reported NPMs. Oxygen plasma etching was used to remove the surface skin layer to obtain membranes with higher surface porosity, membrane hydrophilicity, and flux of both air and water. This is a straightforward method to reliably produce highly tough NPMs with high levels of porosity and hydrophilic surface properties.
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Affiliation(s)
- Brenden D Hoehn
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455-0431, USA
| | | | - Marc A Hillmyer
- Department of Chemistry, University of Minnesota, Minneapolis, MN 55455-0431, USA.
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3
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Zhao M, Liu Y, Zhang J, Jiang H, Chen R. Janus ceramic membranes with asymmetric wettability for high-efficient microbubble aeration. J Memb Sci 2023. [DOI: 10.1016/j.memsci.2023.121418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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4
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Shafie SNA, Shen WY, Jaymon JJ, Nordin NAHM, Mohamednour AEE, Bilad MR, Kee LM, Matsuura T, Othman MHD, Jaafar J, Ismail AF. Controlling Air Bubble Formation Using Hydrophilic Microfiltration Diffuser for C. vulgaris Cultivation. MEMBRANES 2022; 12:membranes12040414. [PMID: 35448384 PMCID: PMC9027748 DOI: 10.3390/membranes12040414] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 04/03/2022] [Accepted: 04/06/2022] [Indexed: 11/16/2022]
Abstract
In this project, a commercial polytetrafluoroethylene (PTFE) membrane was coated with a thin layer of polyether block amide (PEBAX) via vacuum filtration to improve hydrophilicity and to study the bubble formation. Two parameters, namely PEBAX concentration (of 0–1.5 wt%) and air flow rate (of 0.1–50 mL/s), were varied and their effects on the bubble size formation were investigated. The results show that the PEBAX coating reduced the minimum membrane pore size from 0.46 μm without coating (hereafter called PEBAX0) to 0.25 μm for the membrane coated with 1.5wt% of PEBAX (hereafter called PEBAX1.5). The presence of polar functional groups (N-H and C=O) in PEBAX greatly improved the membrane hydrophilicity from 118° for PEBAX0 to 43.66° for PEBAX1.5. At an air flow rate of 43 mL/s, the equivalent bubble diameter size decreased from 2.71 ± 0.14 cm for PEBAX0 to 1.51 ± 0.02 cm for PEBAX1.5. At the same air flow rate, the frequency of bubble formation increased six times while the effective gas–liquid contact area increased from 47.96 cm2/s to 85.6 cm2/s. The improved growth of C. vulgaris from 0.6 g/L to 1.3 g/L for PEBAX1.5 also shows the potential of the PEBAX surface coating porous membrane as an air sparger.
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Affiliation(s)
- Siti Nur Alwani Shafie
- Department of Chemical Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak Darul Ridzuan, Malaysia; (S.N.A.S.); (W.Y.S.); (J.J.J.); (A.E.E.M.); (L.M.K.)
| | - Wong Yoong Shen
- Department of Chemical Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak Darul Ridzuan, Malaysia; (S.N.A.S.); (W.Y.S.); (J.J.J.); (A.E.E.M.); (L.M.K.)
| | - Jc Jcy Jaymon
- Department of Chemical Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak Darul Ridzuan, Malaysia; (S.N.A.S.); (W.Y.S.); (J.J.J.); (A.E.E.M.); (L.M.K.)
| | - Nik Abdul Hadi Md Nordin
- Department of Chemical Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak Darul Ridzuan, Malaysia; (S.N.A.S.); (W.Y.S.); (J.J.J.); (A.E.E.M.); (L.M.K.)
- Correspondence: ; Tel.: +60-137021225
| | - Abdelslam Elsir Elsiddig Mohamednour
- Department of Chemical Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak Darul Ridzuan, Malaysia; (S.N.A.S.); (W.Y.S.); (J.J.J.); (A.E.E.M.); (L.M.K.)
| | - Muhammad Roil Bilad
- Department of Chemical and Process Engineering, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong BE1410, Brunei;
| | - Lam Man Kee
- Department of Chemical Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak Darul Ridzuan, Malaysia; (S.N.A.S.); (W.Y.S.); (J.J.J.); (A.E.E.M.); (L.M.K.)
| | - Takeshi Matsuura
- Department of Chemical Engineering, University of Ottawa, 75 Laurier Ave. E, Ottawa, ON K1N 6N5, Canada;
| | - Mohd Hafiz Dzarfan Othman
- Department of Chemical Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, Johor, Malaysia; (M.H.D.O.); (J.J.); (A.F.I.)
| | - Juhana Jaafar
- Department of Chemical Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, Johor, Malaysia; (M.H.D.O.); (J.J.); (A.F.I.)
| | - Ahmad Fauzi Ismail
- Department of Chemical Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, Johor, Malaysia; (M.H.D.O.); (J.J.); (A.F.I.)
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Dai M, Liu J, Ji Z, Wang S, Zhao Y, Li F, Guo X, Yuan J. Fabrication of superhydrophobic & catalytic bifunctional MnO2 @ Al2O3 composite ceramic membrane for oxidation of desulfurization waste solution. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.128067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Xie B, Zhou C, Huang X, Chen J, Ma X, Zhang J. Microbubble Generation in Organic Solvents by Porous Membranes with Different Membrane Wettabilities. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c01177] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Bingqi Xie
- The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
- The Department of Materials Science and Engineering, China University of Mining & Technology, Beijing 100083, China
| | - Caijin Zhou
- The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Xiaoting Huang
- The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Junxin Chen
- The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Xiangdong Ma
- The Department of Materials Science and Engineering, China University of Mining & Technology, Beijing 100083, China
| | - Jisong Zhang
- The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
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Vladisavljević GT. Preparation of microemulsions and nanoemulsions by membrane emulsification. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123709] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Melich R, Valour JP, Urbaniak S, Padilla F, Charcosset C. Preparation and characterization of perfluorocarbon microbubbles using Shirasu Porous Glass (SPG) membranes. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2018.09.058] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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11
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A Review on Ultrasonic Catalytic Microbubbles Ozonation Processes: Properties, Hydroxyl Radicals Generation Pathway and Potential in Application. Catalysts 2018. [DOI: 10.3390/catal9010010] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Ozone-based advanced oxidant processes (AOPs) have attracted remarkable attention as an alternative and effective approach for mineralization of refractory organics to innocuous substances. Key issues for ozone-based AOPs mainly focused on how to enhance ozone mass transfer and improve the production of hydroxyl radicals. Unfortunately, great efforts have been made, though, the application of ozone-based AOPs still remained in the laboratory scale due to lack of understanding of mechanisms of these hybrid processes. Besides, obtaining the balance of economical-technical feasibility is a great challenge. Ultrasonic catalytic microbubbles ozonation could be considered as a promising method, despite that there are a few studies that addressed this potential technology. Therefore, in this review, summaries about ozone-based microbubbles process, ultrasonic catalytic ozonation process, and ultrasonic catalytic microbubbles ozonation process have been provided in order to give a novel prospective about these hybrid technologies. The main influential parameters, such as initial pH, ozone dosage, intake flow rate, operating temperature, bubble size distributions, ultrasonic frequency, ultrasonic power density, and natural water constituents have also been well discussed. We truly hope that this paper will bring convenience to researchers that are devoted in the field of application of ozone-based AOPs for mineralizing refractory organics in wastewater.
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Pulsipher KW, Hammer DA, Lee D, Sehgal CM. Engineering Theranostic Microbubbles Using Microfluidics for Ultrasound Imaging and Therapy: A Review. ULTRASOUND IN MEDICINE & BIOLOGY 2018; 44:2441-2460. [PMID: 30241729 PMCID: PMC6643280 DOI: 10.1016/j.ultrasmedbio.2018.07.026] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 07/05/2018] [Accepted: 07/27/2018] [Indexed: 05/05/2023]
Abstract
Microbubbles interact with ultrasound in various ways to enable their applications in ultrasound imaging and diagnosis. To generate high contrast and maximize therapeutic efficacy, microbubbles of high uniformity are required. Microfluidic technology, which enables precise control of small volumes of fluid at the sub-millimeter scale, has provided a versatile platform on which to produce highly uniform microbubbles for potential applications in ultrasound imaging and diagnosis. Here, we describe fundamental microfluidic principles and the most common types of microfluidic devices used to produce sub-10 μm microbubbles, appropriate for biomedical ultrasound. Bubbles can be engineered for specific applications by tailoring the bubble size, inner gas and shell composition and by functionalizing for additional imaging modalities, therapeutics or targeting ligands. To translate the laboratory-scale discoveries to widespread clinical use of these microfluidic-based microbubbles, increased bubble production is needed. We present various strategies recently developed to improve scale-up. We conclude this review by describing some outstanding problems in the field and presenting areas for future use of microfluidics in ultrasound.
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Affiliation(s)
- Katherine W Pulsipher
- Department of Chemical and Biomolecular Engineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Daniel A Hammer
- Department of Chemical and Biomolecular Engineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, Pennsylvania, USA; Department of Bioengineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Daeyeon Lee
- Department of Chemical and Biomolecular Engineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Chandra M Sehgal
- Department of Radiology, University of Pennsylvania Medical Center, Philadelphia, Pennsylvania, USA.
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13
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Wright A, Bandulasena H, Ibenegbu C, Leak D, Holmes T, Zimmerman W, Shaw A, Iza F. Dielectric barrier discharge plasma microbubble reactor for pretreatment of lignocellulosic biomass. AIChE J 2018; 64:3803-3816. [PMID: 31031403 PMCID: PMC6474123 DOI: 10.1002/aic.16212] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 04/11/2018] [Indexed: 11/11/2022]
Abstract
A novel lignocellulosic biomass pretreatment reactor has been designed and tested to investigate pretreatment efficacy of miscanthus grass. The reactor was designed to optimize the transfer of highly oxidative species produced by dielectric barrier discharge plasma to the liquid phase immediately after generation, by arranging close proximity of the plasma to the gas-liquid interface of microbubbles. The reactor produced a range of reactive oxygen species and reactive nitrogen species, and the rate of production depended on the power source duty cycle and the temperature of the plasma. Ozone and other oxidative species were dispersed efficiently using energy efficient microbubbles produced by fluidic oscillations. A 5% (w/w) miscanthus suspension pretreated for 3 h at 10% duty cycle yielded 0.5% acid soluble lignin release and 26% sugar release post hydrolysis with accelerated pretreatment toward the latter stages of the treatment demonstrating the potential of this approach as an alternative pretreatment method. © 2018 The Authors. AIChE Journal published by Wiley Periodicals, Inc. on behalf of American Institute of Chemical Engineers. © 2018 The Authors. AIChE Journal published by Wiley Periodicals, Inc. on behalf of American Institute of Chemical Engineers. AIChE J, 64: 3803-3816, 2018.
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Affiliation(s)
- Alexander Wright
- Dept. of Chemical Engineering; Loughborough University; Loughborough Leicestershire, LE11 3TU U.K
| | - Hemaka Bandulasena
- Dept. of Chemical Engineering; Loughborough University; Loughborough Leicestershire, LE11 3TU U.K
| | | | - David Leak
- Dept. of Biology and Biochemistry; University of Bath; Bath, BA2 7AY U.K
| | - Thomas Holmes
- Dept. of Chemical and Biological Engineering; University of Sheffield; Sheffield, S10 2TN U.K
| | - William Zimmerman
- Dept. of Chemical and Biological Engineering; University of Sheffield; Sheffield, S10 2TN U.K
| | - Alex Shaw
- Wolfson School of Mechanical, Electrical and Manufacturing Engineering; Loughborough University; Loughborough Leicestershire, LE11 3TU U.K
| | - Felipe Iza
- Wolfson School of Mechanical, Electrical and Manufacturing Engineering; Loughborough University; Loughborough Leicestershire, LE11 3TU U.K
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14
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Liu Y, Han Y, Li X, Jiang H, Chen R. Efficient Control of Microbubble Properties by Alcohol Shear Flows in Ceramic Membrane Channels. Chem Eng Technol 2018. [DOI: 10.1002/ceat.201700226] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yefei Liu
- Nanjing Tech University; College of Chemical Engineering; Xinmofan Road No. 5 210009 Nanjing China
| | - Yang Han
- Nanjing Tech University; College of Chemical Engineering; Xinmofan Road No. 5 210009 Nanjing China
| | - Xiaoli Li
- Nanjing Tech University; College of Chemical Engineering; Xinmofan Road No. 5 210009 Nanjing China
| | - Hong Jiang
- Nanjing Tech University; College of Chemical Engineering; Xinmofan Road No. 5 210009 Nanjing China
| | - Rizhi Chen
- Nanjing Tech University; College of Chemical Engineering; Xinmofan Road No. 5 210009 Nanjing China
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15
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Han Y, Liu Y, Jiang H, Xing W, Chen R. Large scale preparation of microbubbles by multi-channel ceramic membranes: Hydrodynamics and mass transfer characteristics. CAN J CHEM ENG 2017. [DOI: 10.1002/cjce.22825] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yang Han
- State Key Laboratory of Materials-Oriented Chemical Engineering; Nanjing Tech University; Nanjing 210009 China
| | - Yefei Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering; Nanjing Tech University; Nanjing 210009 China
| | - Hong Jiang
- State Key Laboratory of Materials-Oriented Chemical Engineering; Nanjing Tech University; Nanjing 210009 China
| | - Weihong Xing
- State Key Laboratory of Materials-Oriented Chemical Engineering; Nanjing Tech University; Nanjing 210009 China
| | - Rizhi Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering; Nanjing Tech University; Nanjing 210009 China
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16
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LIU ZM, YANG Y, DU Y, PANG Y. Advances in Droplet-Based Microfluidic Technology and Its Applications. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2017. [DOI: 10.1016/s1872-2040(17)60994-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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17
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Shih R, Lee AP. Post-Formation Shrinkage and Stabilization of Microfluidic Bubbles in Lipid Solution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:1939-1946. [PMID: 26820229 DOI: 10.1021/acs.langmuir.5b03948] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Medical ultrasound imaging often employs ultrasound contrast agents (UCAs), injectable microbubbles stabilized by shells or membranes. In tissue, the compressible gas cores can strongly scatter acoustic signals, resonate, and emit harmonics. However, bubbles generated by conventional methods have nonuniform sizes, reducing the fraction that resonates with a given transducer. Microfluidic flow-focusing is an alternative production method which generates highly monodisperse bubbles with uniform constituents, enabling more-efficient contrast enhancement than current UCAs. Production size is tunable by adjusting gas pressure and solution flow rate, but solution effects on downstream stable size and lifetime have not been closely examined. This study therefore investigated several solution parameters, including the DSPC/DSPE-PEG2000 lipid ratio, concentration, viscosity, and preparation temperature to determine their effects on stabilization. It was found that bubble lifetime roughly correlated with stable size, which in turn was strongly influenced by primary-lipid-to-emulsifier ratio, analogous to its effects on conventional bubble yield and Langmuir-trough compressibility in existing studies. Raising DSPE-PEG2000 fraction in solution reduced bubble surface area in proportion to its reduction of lipid packing density at low compression in literature. In addition, the surface area was found to increase proportionately with lipid concentration above 2.1 mM. However, viscosities above or below 2.3-3.3 mPa·s seemed to reduce bubble size. Finally, lipid preparation at room temperature led to smaller bubbles compared to preparation near or above the primary lipid's phase transition point. Understanding these effects will further improve on postformation control over microfluidic bubble production, and facilitate size-tuning for optimal contrast enhancement.
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Affiliation(s)
- Roger Shih
- Department of Biomedical Engineering, University of California Irvine , 3406 Engineering Hall, Irvine, California 92697, United States
| | - Abraham P Lee
- Department of Biomedical Engineering, University of California Irvine , 3406 Engineering Hall, Irvine, California 92697, United States
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18
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Wesley DJ, Smith RM, Zimmerman WB, Howse JR. Influence of Surface Wettability on Microbubble Formation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:1269-1278. [PMID: 26754879 DOI: 10.1021/acs.langmuir.5b03743] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The production and utilization of microbubbles are rapidly becoming of major importance in a number of global applications, from biofuel production to medical imaging contrast agents. Many aspects of bubble formation have been studied, with diffuser characteristics (such as pore size, pore orientation) and gas flow rate all being shown to influence the bubble formation process. However, very little attention has been paid to the influence of surface wettability of the diffuser and the detailed role it plays at the triple interface of gas-liquid-diffuser. Here, we investigate how the wettability of the diffuser surface impacts upon the dynamics of the bubble formation process and examine the effect both at the orifice and upon the bubble cloud produced as a result of the engineered wetting variations. Experimental data shown here indicate the presence of a switching point at a contact angle of θ = 90°, where bubble size vastly changes. When a surface exhibits a contact angle below 90°, bubbles emitted from it are considerably smaller than those emitted from a surface with an angle in excess of 90°. This effect is observable over flow rates ranging from 2.5 to 60 mL min(-1) from a single pore, an array of controlled pores, and the industrially relevant and commercially available sintered metals and sintered ceramic diffusers. It is also observed for both thiol and silane modified surfaces, encompassing a range of contact angles from 10° to 110°. In addition, the importance of the diffuser plate's surface topography is discussed, with elevated roughness acting to reduce the effect of surface chemistry in some instances.
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Affiliation(s)
- Daniel J Wesley
- Department of Chemical and Biological Engineering, University of Sheffield , Mappin Street, Sheffield S1 3JD, United Kingdom
| | - Rachel M Smith
- Department of Chemical and Biological Engineering, University of Sheffield , Mappin Street, Sheffield S1 3JD, United Kingdom
| | - William B Zimmerman
- Department of Chemical and Biological Engineering, University of Sheffield , Mappin Street, Sheffield S1 3JD, United Kingdom
| | - Jonathan R Howse
- Department of Chemical and Biological Engineering, University of Sheffield , Mappin Street, Sheffield S1 3JD, United Kingdom
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Zhang L, Liu J, Liu C, Zhang J, Yang J. Performance of a fixed-bed biofilm reactor with microbubble aeration in aerobic wastewater treatment. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2016; 74:138-146. [PMID: 27386991 DOI: 10.2166/wst.2016.187] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Microbubble aeration is supposed to be highly efficient for oxygen supply in aerobic wastewater treatment. In the present study, the performance of a fixed-bed biofilm reactor microbubble-aerated using a Shirasu porous glass (SPG) membrane system was investigated when treating synthetic municipal wastewater. The biofilm formation on the carriers was enhanced with microbubble aeration due to the strong adhesion of microbubbles to the solid surface. The dissolved oxygen concentration, the removals of chemical oxygen demand (COD) and nitrogen, and the oxygen utilization efficiency were influenced by the organic loading rate at a certain oxygen supply capacity. The relatively optimal organic loading rate was determined as 0.82 kgCOD/(m(3)d) when the oxygen supply capacity was 0.93 kgO(2)/(m(3)d), where COD and ammonia removal efficiencies were 91.7% and 53.9%, respectively. The corresponding SPG membrane area-based COD removal capacity was 6.88 kgCOD/(m(2)d). The oxygen utilization efficiency of microbubble aeration was obviously higher compared to conventional bubble aeration. The simultaneous nitrification and denitrification occurred in the biofilm reactor and the total nitrogen removal efficiency of 50.4% was achieved under these conditions. In addition, the increase in air supply capacity of the SPG membrane system was suggested to improve its energy utilization efficiency.
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Affiliation(s)
- Lei Zhang
- Institute of Urban and Rural Construction, Agricultural University of Hebei, Baoding 071001, China; Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Yuxiang Road 26#, Shijiazhuang 050018, China E-mail:
| | - Junliang Liu
- Institute of Urban and Rural Construction, Agricultural University of Hebei, Baoding 071001, China
| | - Chun Liu
- Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Yuxiang Road 26#, Shijiazhuang 050018, China E-mail:
| | - Jing Zhang
- Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Yuxiang Road 26#, Shijiazhuang 050018, China E-mail:
| | - Jingliang Yang
- Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Yuxiang Road 26#, Shijiazhuang 050018, China E-mail:
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Brittle S, Desai P, Ng WC, Dunbar A, Howell R, Tesař V, Zimmerman WB. Minimising microbubble size through oscillation frequency control. Chem Eng Res Des 2015. [DOI: 10.1016/j.cherd.2015.08.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Zheng T, Wang Q, Zhang T, Shi Z, Tian Y, Shi S, Smale N, Wang J. Microbubble enhanced ozonation process for advanced treatment of wastewater produced in acrylic fiber manufacturing industry. JOURNAL OF HAZARDOUS MATERIALS 2015; 287:412-420. [PMID: 25681716 DOI: 10.1016/j.jhazmat.2015.01.069] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2014] [Revised: 01/28/2015] [Accepted: 01/30/2015] [Indexed: 06/04/2023]
Abstract
This work investigated microbubble-ozonation for the treatment of a refractory wet-spun acrylic fiber wastewater in comparison to macrobubble-ozonation. CODcr, NH3-N, and UV254 of the wastewater were removed by 42%, 21%, and 42%, respectively in the microbubble-ozonation, being 25%, 9%, and 35% higher than the removal rates achieved by macrobubble-ozonation at the same ozone dose. The microbubbles (with average diameter of 45μm) had a high concentration of 3.9×10(5) counts/mL at a gas flow rate of 0.5L/min. The gas holdup, total ozone mass-transfer coefficient, and average ozone utilization efficiency in the microbubble-ozonation were 6.6, 2.2, and 1.5 times higher than those of the macrobubble-ozonation. Greater generation of hydroxyl radicals and a higher zeta potential of the bubbles were also observed in the microbubble ozonation process. The biodegradability of the wastewater was also significantly improved by microbubble-ozonation, which was ascribed to the enhanced degradation of alkanes, aromatic compounds, and the many other bio-refractory organic compounds in the wastewater. Microbubble-ozonation can thus be a more effective treatment process than traditional macrobubble-ozonation for refractory wastewater produced by the acrylic fiber manufacturing industry.
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Affiliation(s)
- Tianlong Zheng
- Department of Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China.
| | - Qunhui Wang
- Department of Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China; Beijing Key Laboratory on Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China.
| | - Tao Zhang
- Water Desalination and Reuse Center, King Abdullah University of Science and Technology, Thuwal 4700, Saudi Arabia.
| | - Zhining Shi
- School of Earth and Environmental Sciences, The University of Adelaide, South Australia 5005, Australia.
| | - Yanli Tian
- Department of Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China.
| | - Shanshan Shi
- Department of Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China.
| | - Nicholas Smale
- School of Earth and Environmental Sciences, The University of Adelaide, South Australia 5005, Australia.
| | - Juan Wang
- Department of Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China.
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22
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Lee M, Lee EY, Lee D, Park BJ. Stabilization and fabrication of microbubbles: applications for medical purposes and functional materials. SOFT MATTER 2015; 11:2067-79. [PMID: 25698443 DOI: 10.1039/c5sm00113g] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Microbubbles with diameters ranging from a few micrometers to tens of micrometers have garnered significant attention in various applications including food processing, water treatment, enhanced oil recovery, surface cleaning, medical purposes, and material preparation fields with versatile functionalities. A variety of techniques have been developed to prepare microbubbles, such as ultrasonication, excimer laser ablation, high shear emulsification, membrane emulsification, an inkjet printing method, electrohydrodynamic atomization, template layer-by-layer deposition, and microfluidics. Generated bubbles should be immediately stabilized via the adsorption of stabilizing materials (e.g., surfactants, lipids, proteins, and solid particles) onto the gas-liquid interface to lower the interfacial tension. Such adsorption of stabilizers prevents coalescence between the microbubbles and also suppresses gas dissolution and resulting disproportionation caused by the presence of the Laplace overpressure across the gas-liquid interface. Herein, we comprehensively review three important topics of microbubbles: stabilization, fabrication, and applications.
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Affiliation(s)
- Mina Lee
- Department of Chemical Engineering, Kyung Hee University, Yongin, 446-701, South Korea.
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23
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Effect of membrane wettability on membrane fouling and chemical durability of SPG membranes used in a microbubble-aerated biofilm reactor. Sep Purif Technol 2014. [DOI: 10.1016/j.seppur.2014.03.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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24
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Spyropoulos F, Lloyd DM, Hancocks RD, Pawlik AK. Advances in membrane emulsification. Part A: recent developments in processing aspects and microstructural design approaches. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2014; 94:613-627. [PMID: 24122870 DOI: 10.1002/jsfa.6444] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Revised: 08/05/2013] [Accepted: 10/10/2013] [Indexed: 06/02/2023]
Abstract
Modern emulsion processing technology is strongly influenced by the market demands for products that are microstructure-driven and possess precisely controlled properties. Novel cost-effective processing techniques, such as membrane emulsification, have been explored and customised in the search for better control over the microstructure, and subsequently the quality of the final product. Part A of this review reports on the state of the art in membrane emulsification techniques, focusing on novel membrane materials and proof of concept experimental set-ups. Engineering advantages and limitations of a range of membrane techniques are critically discussed and linked to a variety of simple and complex structures (e.g. foams, particulates, liposomes etc.) produced specifically using those techniques.
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Affiliation(s)
- Fotis Spyropoulos
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
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25
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Liu C, Tanaka H, Zhang J, Zhang L, Yang J, Huang X, Kubota N. Successful application of Shirasu porous glass (SPG) membrane system for microbubble aeration in a biofilm reactor treating synthetic wastewater. Sep Purif Technol 2013. [DOI: 10.1016/j.seppur.2012.10.023] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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26
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Liu C, Tanaka H, Zhang L, Zhang J, Huang X, Ma J, Matsuzawa Y. Fouling and structural changes of Shirasu porous glass (SPG) membrane used in aerobic wastewater treatment process for microbubble aeration. J Memb Sci 2012. [DOI: 10.1016/j.memsci.2012.07.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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27
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Liu C, Tanaka H, Ma J, Zhang L, Zhang J, Huang X, Matsuzawa Y. Effect of microbubble and its generation process on mixed liquor properties of activated sludge using Shirasu porous glass (SPG) membrane system. WATER RESEARCH 2012; 46:6051-6058. [PMID: 22975738 DOI: 10.1016/j.watres.2012.08.032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Revised: 08/15/2012] [Accepted: 08/22/2012] [Indexed: 06/01/2023]
Abstract
Microbubble aeration is supposed to be able to provide potential advantage for aerobic biological wastewater treatment due to enhancement of oxygen mass transfer. On the other hand, microbubble and its generation methods might affect mixed liquor properties of activated sludge. Then SPG membrane microbubble generation system was used to investigate variation of mixed liquor properties of activated sludge in microbubble aeration. The results indicated that sludge floatation happened in microbubble aeration due to attachment of microbubbles to sludge flocs, resulting in a decrease in mixed liquor suspended solid (MLSS) concentration and poor sludge settleability. The strong shear stress caused by liquid circulation pump during microbubble generation led to sludge broken, resulting in decreased sludge floc size and sludge organics release, such as extracellular polymers (EPS). The organics release from broken sludge flocs was the main reason for increased both supernatant organic content (especially organic colloids) and consequent supernatant turbidity. The re-flocculation ability of broken sludge flocs also depended on sludge EPS release. In addition, the viscosity of mixed liquor increased along with sludge broken and increased supernatant organic content but the surface tension of mixed liquor remained constant. These results displayed the possible problems to apply microbubble aeration in aerobic wastewater treatment processes based on activated sludge.
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Affiliation(s)
- Chun Liu
- School of Environmental Science and Engineering, Hebei University of Science and Technology, Yuhua East Road, Shijiazhuang 050018, China.
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28
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Khirani S, Kunwapanitchakul P, Augier F, Guigui C, Guiraud P, Hébrard G. Microbubble Generation through Porous Membrane under Aqueous or Organic Liquid Shear Flow. Ind Eng Chem Res 2011. [DOI: 10.1021/ie200604g] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sarah Khirani
- Université de Toulouse, INSA, UPS, INP; LISBP, 135, avenue de Rangueil, F-31077 Toulouse, France
- INRA, UMR 792 Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse, France
- CNRS UMR 5504, F-31400 Toulouse, France
| | - Papitchaya Kunwapanitchakul
- Université de Toulouse, INSA, UPS, INP; LISBP, 135, avenue de Rangueil, F-31077 Toulouse, France
- INRA, UMR 792 Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse, France
- CNRS UMR 5504, F-31400 Toulouse, France
| | - Frédéric Augier
- IFP Energies Nouvelles, Rond-point de l’échangeur de Solaize, BP 3, F-69360 Solaize, France
| | - Christelle Guigui
- Université de Toulouse, INSA, UPS, INP; LISBP, 135, avenue de Rangueil, F-31077 Toulouse, France
- INRA, UMR 792 Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse, France
- CNRS UMR 5504, F-31400 Toulouse, France
| | - Pascal Guiraud
- Université de Toulouse, INSA, UPS, INP; LISBP, 135, avenue de Rangueil, F-31077 Toulouse, France
- INRA, UMR 792 Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse, France
- CNRS UMR 5504, F-31400 Toulouse, France
| | - Gilles Hébrard
- Université de Toulouse, INSA, UPS, INP; LISBP, 135, avenue de Rangueil, F-31077 Toulouse, France
- INRA, UMR 792 Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse, France
- CNRS UMR 5504, F-31400 Toulouse, France
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29
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Kukizaki M, Baba Y. Effect of surfactant type on microbubble formation behavior using Shirasu porous glass (SPG) membranes. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2008.05.025] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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