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Hou T, Song H, Cui Z, He C, Liu L, Li P, Li G, Zhang Q, Zhang Z, Lei Z, Litti YV, Jiao Y. Nanobubble technology to enhance energy recovery from anaerobic digestion of organic solid wastes: Potential mechanisms and recent advancements. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 931:172885. [PMID: 38697546 DOI: 10.1016/j.scitotenv.2024.172885] [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: 02/19/2024] [Revised: 04/15/2024] [Accepted: 04/27/2024] [Indexed: 05/05/2024]
Abstract
Nanobubble (NB) technology has gained popularity in the environmental field owing to its distinctive characteristics and ecological safety. More recently, the application of NB technology in anaerobic digestion (AD) systems has been proven to promote substrate degradation and boost the production of biogas (H2 and/or CH4). This review presents the recent advancements in the application of NB technology in AD systems. Meanwhile, it also sheds light on the underlying mechanisms of NB technology that contribute to the enhanced biogas production from AD of organic solid wastes. Specifically, the working principles of the NB generator are first summarized, and then the structure of the NB generator is optimized to accommodate the demand for NB characteristics in the AD system. Subsequently, it delves into a detailed discussion of how the addition of nanobubble water (NBW) affects AD performance and the different factors that NB can potentially contribute. As a simple and environmentally friendly additive, NBW was commonly used in the AD process to enhance the fluidity and mass transfer characteristics of digestate. Additionally, NB has the potential to enhance the functionality of different types of microbial enzymes that play crucial roles in the AD process. This includes boosting extracellular hydrolase activities, optimizing coenzyme F420, and improving cellulase function. Finally, it is proposed that NBW has development potential for the pretreatment of substrate and inoculum, with future development being directed towards this aim.
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Affiliation(s)
- Tingting Hou
- Key Laboratory of New Materials and Facilities for Rural Renewable Energy of Ministry of Agriculture and Rural Affairs, College of Mechanical & Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China; Henan International Joint Laboratory of Biomass Energy and Nanomaterials, Henan Agricultural University, Zhengzhou 450002, China; Henan Collaborative Innovation Center of Biomass Energy, Henan Agricultural University, Zhengzhou 450002, China
| | - Hao Song
- Key Laboratory of New Materials and Facilities for Rural Renewable Energy of Ministry of Agriculture and Rural Affairs, College of Mechanical & Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China; Henan International Joint Laboratory of Biomass Energy and Nanomaterials, Henan Agricultural University, Zhengzhou 450002, China; Henan Collaborative Innovation Center of Biomass Energy, Henan Agricultural University, Zhengzhou 450002, China
| | - Zhiqiang Cui
- Key Laboratory of New Materials and Facilities for Rural Renewable Energy of Ministry of Agriculture and Rural Affairs, College of Mechanical & Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China; Henan International Joint Laboratory of Biomass Energy and Nanomaterials, Henan Agricultural University, Zhengzhou 450002, China; Henan Collaborative Innovation Center of Biomass Energy, Henan Agricultural University, Zhengzhou 450002, China
| | - Chao He
- Key Laboratory of New Materials and Facilities for Rural Renewable Energy of Ministry of Agriculture and Rural Affairs, College of Mechanical & Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China; Henan International Joint Laboratory of Biomass Energy and Nanomaterials, Henan Agricultural University, Zhengzhou 450002, China; Henan Collaborative Innovation Center of Biomass Energy, Henan Agricultural University, Zhengzhou 450002, China.
| | - Liang Liu
- Key Laboratory of New Materials and Facilities for Rural Renewable Energy of Ministry of Agriculture and Rural Affairs, College of Mechanical & Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China; Henan International Joint Laboratory of Biomass Energy and Nanomaterials, Henan Agricultural University, Zhengzhou 450002, China; Henan Collaborative Innovation Center of Biomass Energy, Henan Agricultural University, Zhengzhou 450002, China
| | - Pengfei Li
- Key Laboratory of New Materials and Facilities for Rural Renewable Energy of Ministry of Agriculture and Rural Affairs, College of Mechanical & Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China; Henan International Joint Laboratory of Biomass Energy and Nanomaterials, Henan Agricultural University, Zhengzhou 450002, China; Henan Collaborative Innovation Center of Biomass Energy, Henan Agricultural University, Zhengzhou 450002, China
| | - Gang Li
- Key Laboratory of New Materials and Facilities for Rural Renewable Energy of Ministry of Agriculture and Rural Affairs, College of Mechanical & Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China; Henan International Joint Laboratory of Biomass Energy and Nanomaterials, Henan Agricultural University, Zhengzhou 450002, China; Henan Collaborative Innovation Center of Biomass Energy, Henan Agricultural University, Zhengzhou 450002, China
| | - Quanguo Zhang
- Key Laboratory of New Materials and Facilities for Rural Renewable Energy of Ministry of Agriculture and Rural Affairs, College of Mechanical & Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China; Henan International Joint Laboratory of Biomass Energy and Nanomaterials, Henan Agricultural University, Zhengzhou 450002, China; Henan Collaborative Innovation Center of Biomass Energy, Henan Agricultural University, Zhengzhou 450002, China
| | - Zhenya Zhang
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Zhongfang Lei
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Yuri V Litti
- Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 119071 Moscow, Russia
| | - Youzhou Jiao
- Henan University of Engineering, Zhengzhou 451191, China.
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Jannesari M, Caslin A, English NJ. Electric field-based air nanobubbles (EF-ANBs) irrigation on efficient crop cultivation with reduced fertilizer dependency. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 362:121228. [PMID: 38823304 DOI: 10.1016/j.jenvman.2024.121228] [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: 02/26/2024] [Revised: 05/07/2024] [Accepted: 05/21/2024] [Indexed: 06/03/2024]
Abstract
The advent of air nanobubbles (ANBs) has opened up a wide range of commercial applications spanning industries including wastewater treatment, food processing, biomedical engineering, and agriculture. The implementation of electric field-based air nanobubbles (EF-ANBs) irrigation presents a promising approach to enhance agricultural crop efficiency, concurrently promoting environmentally sustainable practices through reducing fertilizer usage. This study investigated the impact of EF-ANBs on the germination and overall growth of agricultural crops in soil. Results indicate a substantial enhancement in both germination rates and plant growth upon the application of EF-ANBs. Notably, the introduction of ANBs led to a significant enhancement in the germination rate of lettuce and basil, increasing from approximately 20% to 96% and from 16% to 53%, respectively over two days. Moreover, the presence of EF-ANBs facilitates superior hypocotyl elongation, exhibiting a 2.8- and a 1.6-fold increase in the elongation of lettuce and basil, respectively, over a six-day observation period. The enriched oxygen levels within the air nanobubbles expedite aerobic respiration, amplifying electron leakage from the electron transport chain (ETC) and resulting in heightened reactive oxygen species (ROS) production, playing a pivotal role in stimulating growth signaling. Furthermore, the application of EF-ANBs in irrigation surpasses the impact of traditional fertilizers, demonstrating a robust catalytic effect on the shoot, stem, and root length, as well as the leaf count of lettuce plants. Considering these parameters, a single fertilizer treatment (at various concentrations) during EF-ANBs administration, demonstrates superior plant growth compared to regular water combined with fertilizer. The findings underscore the synergistic interaction between aerobic respiration and the generation of ROS in promoting plant growth, particularly in the context of reduced fertilizer levels facilitated by the presence of EF-ANBs. This promising correlation holds significant potential in establishing more sustainability for ever-increasing environmentally conscious agriculture.
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Affiliation(s)
- Marziyeh Jannesari
- School of Chemical and Bioprocess Engineering, University College Dublin, Belfield, D04 V1W8, Dublin, Ireland.
| | - Anna Caslin
- School of Chemical and Bioprocess Engineering, University College Dublin, Belfield, D04 V1W8, Dublin, Ireland
| | - Niall J English
- School of Chemical and Bioprocess Engineering, University College Dublin, Belfield, D04 V1W8, Dublin, Ireland.
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Fitzgerald E, Kumar A, Poulose S, Coey JMD. Interaction and Stability of Nanobubbles and Prenucleation Calcium Clusters during Ultrasonic Treatment of Hard Water. ACS OMEGA 2024; 9:2547-2558. [PMID: 38250393 PMCID: PMC10795157 DOI: 10.1021/acsomega.3c07305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 11/27/2023] [Accepted: 12/08/2023] [Indexed: 01/23/2024]
Abstract
To investigate the stability of nanobubbles in natural hard water, a series of eight samples ranging in hardness from 0 to 332 mg/L CaCO3 were sonicated for periods of 5-45 min with an ultrasonic horn. Conductivity, temperature, ζ-potential, composition, and pH of the water were analyzed, together with the crystal structure of any calcium carbonate precipitate. Quasi-stable populations of bulk nanobubbles in Millipore and soft water are characterized by a ζ-potential of -35 to -20 mV, decaying over 60 h or more. After sonicating the hardest waters for about 10 min, they turn cloudy due to precipitation of amorphous calcium carbonate when the water temperature reaches 40 °C; the ζ-potential then jumps from -10 to +20 mV and remains positive for several days. From an analysis of the change of conductivity of the hard water before and after sonication, it is estimated that 37 ± 5% of calcium was not originally in solution but existed in nanoscale prenucleation clusters, which decorate the nanobubbles formed in the early stages of sonication. Heating and charge screening in the nanobubble colloid cause the decorated bubbles to collapse or disperse, leaving an amorphous precursor of aragonite. Sonicating the soft supernatant increases its conductivity and pH and restores the negative ζ-potential associated with bulk nanobubbles, but there is no further precipitation. Our study of the correlation between nanobubble production and calcium agglomeration spanning the hardness and composition ranges of natural waters shows that the sonication method for introducing nanobubbles is viable only for hard water if it is kept cold; the stability of the nanobubble colloid will be reduced in any case by the presence of dissolved calcium and magnesium.
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Affiliation(s)
- Eavan Fitzgerald
- School of Physics, Trinity College Dublin, Dublin D02 PN40, Ireland
| | - Anup Kumar
- School of Physics, Trinity College Dublin, Dublin D02 PN40, Ireland
| | - Sruthy Poulose
- School of Physics, Trinity College Dublin, Dublin D02 PN40, Ireland
| | - J. M. D. Coey
- School of Physics, Trinity College Dublin, Dublin D02 PN40, Ireland
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Sagara K, Kataoka S, Yoshida A, Ansai T. The effects of exposure to O 2- and HOCl-nanobubble water on human salivary microbiota. Sci Rep 2023; 13:21125. [PMID: 38036562 PMCID: PMC10689733 DOI: 10.1038/s41598-023-48441-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 11/27/2023] [Indexed: 12/02/2023] Open
Abstract
Nanobubbles of gas remain dissolved in water for longer periods than ordinary bubbles, and exhibit unique physicochemical and biological properties. As a result, nanobubble water (NBW) is finding widespread use many applications, such as cleaning in the industry and purification of lake water. The ozone NBW (O3-NBW), in particular, has been used in clinical dentistry; however, it has several disadvantages, including the instability of ozone, which is spontaneously converted to molecular oxygen (O3 to O2), and its broad range of antibacterial activity, which can disrupt the oral microbiota. Therefore, the use of NBW in dental medicine requires greater evaluation. Here, we examined the effects of oxygen and hypochlorite NBW (O2-NBW and HOCl-NBW, respectively) on the microbiota in human saliva in 16 male patients (35-75 years old; median: 53.5 years) using multiple assays, including next generation sequencing analysis. 16S rRNA gene sequencing revealed no significant changes in both alpha-diversity and beta-diversity. Principal Coordinate Analysis (PCoA) revealed two subclusters in both unweighted and weighted UniFrac distances. Overall, the results revealed that HOCl-NBW exposure of saliva may lead to inhibition or delay in oral biofilm formation while maintaining the balance of the oral microbiome. These results can lead to the development of a novel type of mouthrinse for prevention of oral infectious diseases.
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Affiliation(s)
- Ken Sagara
- Division of Community Oral Health Development, Kyushu Dental University, 2-6-1 Manazuru, Kokurakita-ku, Kitakyushu, 803-8580, Japan
| | - Shota Kataoka
- Division of Community Oral Health Development, Kyushu Dental University, 2-6-1 Manazuru, Kokurakita-ku, Kitakyushu, 803-8580, Japan
| | - Akihiro Yoshida
- Deparment of Oral Microbiology, Matsumoto Dental University, Shiojiri, Japan
| | - Toshihiro Ansai
- Division of Community Oral Health Development, Kyushu Dental University, 2-6-1 Manazuru, Kokurakita-ku, Kitakyushu, 803-8580, Japan.
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Oshita S, Boerzhijin S, Kameya H, Yoshimura M, Sotome I. Promotion Effects of Ultrafine Bubbles/Nanobubbles on Seed Germination. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13101677. [PMID: 37242093 DOI: 10.3390/nano13101677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 05/17/2023] [Accepted: 05/17/2023] [Indexed: 05/28/2023]
Abstract
The number concentrations of air UFBs were controlled, approximately, by adjusting the generation time. UFB waters, ranging from 1.4 × 108 mL-1 to 1.0 × 109 mL-1, were prepared. Barley seeds were submerged in beakers filled with distilled water and UFB water in a ratio of 10 mL of water per seed. The experimental observations of seed germination clarified the role of UFB number concentrations; that is, a higher number concentration induced earlier seed germination. In addition, excessively high UFB number concentrations caused suppression of seed germination. A possible reason for the positive or negative effects of UFBs on seed germination could be ROS generation (hydroxyl radicals and ∙OH, OH radicals) in UFB water. This was supported by the detection of ESR spectra of the CYPMPO-OH adduct in O2 UFB water. However, the question still remains: how can OH radicals be generated in O2 UFB water?
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Affiliation(s)
- Seiichi Oshita
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
| | - Surina Boerzhijin
- National Research Institute of Brewing, 3-7-1 Kagamiyama, Higashihiroshima 739-0046, Japan
| | - Hiromi Kameya
- Institute of Food Research, National Agriculture and Food Research Organization (NARO), Kan-nondai, Tsukuba 305-8642, Japan
| | - Masatoshi Yoshimura
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
| | - Itaru Sotome
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
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Wang E, Sun H, Chen P, Zheng Y, Guo J, Dong R. Two-step anaerobic digestion of rice straw with nanobubble water. BIORESOURCE TECHNOLOGY 2023; 376:128928. [PMID: 36940882 DOI: 10.1016/j.biortech.2023.128928] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 03/13/2023] [Accepted: 03/16/2023] [Indexed: 06/18/2023]
Abstract
Lignocellulose usually requires pretreatment to improve biogas production. To enhance lignocellulose biodegradability and improve anaerobic digestion (AD) efficiency, different types (N2, CO2, and O2) of nanobubble water (NW) were applied in this study as soaking agent and AD accelerant to increase the biogas yield of rice straw. The results showed that the cumulative methane yields of treating with NW in two-step AD increased by 11.0%-21.4% compared with untreated straw. The maximum cumulative methane yield was 313.9±1.7 mL/gVS in straw treated with CO2-NW as soaking agent and AD accelerant (PCO2-MCO2). The application of CO2-NW and O2-NW as AD accelerants increased bacterial diversity and relative abundance of Methanosaeta. This study suggested that using NW could enhance soaking pretreatment and methane production of rice straw in two-step AD; however, combined treatment with inoculum and NW or microbubble water in the pretreatment needs to compare in future.
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Affiliation(s)
- Enzhen Wang
- College of Engineering (Key Laboratory for Clean Renewable Energy Utilization Technology, Ministry of Agriculture), China Agricultural University, Beijing 100083, PR China
| | - Hui Sun
- College of Mechanical & Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, PR China
| | - Penghui Chen
- College of Engineering (Key Laboratory for Clean Renewable Energy Utilization Technology, Ministry of Agriculture), China Agricultural University, Beijing 100083, PR China
| | - Yonghui Zheng
- College of Engineering (Key Laboratory for Clean Renewable Energy Utilization Technology, Ministry of Agriculture), China Agricultural University, Beijing 100083, PR China
| | - Jianbin Guo
- College of Engineering (Key Laboratory for Clean Renewable Energy Utilization Technology, Ministry of Agriculture), China Agricultural University, Beijing 100083, PR China.
| | - Renjie Dong
- College of Engineering (Key Laboratory for Clean Renewable Energy Utilization Technology, Ministry of Agriculture), China Agricultural University, Beijing 100083, PR China
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Senthilkumar G, Aravind Kumar J. Nanobubbles: a promising efficient tool for therapeutic delivery of antibacterial agents for the Staphylococcus aureus infections. APPLIED NANOSCIENCE 2023:1-14. [PMID: 37362151 PMCID: PMC10141880 DOI: 10.1007/s13204-023-02854-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 04/14/2023] [Indexed: 06/28/2023]
Abstract
The current research is focused to address the implementation of nanobubbles technology to antibacterial agents against Staphylococcus aureus infections. Nanobubbles technology is a novel, latest research employed in many medical fields including drug discovery. In this present work, supramolecular nanoliquid formulation of potential antiseptic agent chloroxylenol-based Dettol and its enhanced antibacterial activity, biocompatibility assessment was studied. Nanobubble technology was adopted to prepare nanoformulation (NB-D) using a household hand mixer under thermostatically controlled conditions. A high-stability nanoformulation with high potential antibacterial activity against human pathogenic strains of Pseudomonas aeruginosa and Staphylococcus aureus was produced by the nanobubbles created in the antiseptic solution. The overall vitality of both strains was significantly reduced in all dose tests on NB-D treatment as a result of the antibacterial activity as assessed by the well-diffusion assay, turbidometric microdilution assay, biofilm inhibition assay, and total count reduction assay. Biocompatibility of the NB-D formulation was studied by the determination of cytotoxicity against HaCaT-human keratinocytes and hemocytes. NB-D treatment did not induce any notable cytotoxic effect on HaCaT cells by showing none of the changes in cell morphology and architecture. No toxic effect on the hematocytes was observed in NB-D treatment. The enhanced antibacterial activity and best biocompatibility of NB-D result shows that the nanobubble technology could be used as an effective strategy for the formulation of antiseptics or disinfectants against high health risk infectious organisms. The novelty of the work is the formation of supramolecular nanoformulation on antiseptic agent which promised the results enhanced than the raw antiseptic agent.
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Affiliation(s)
- G. Senthilkumar
- Department of Mechanical Engineering, Sathyabama Institute of Science and Technology, Chennai, 600119 India
| | - J. Aravind Kumar
- Department of Energy and Environmental Engineering, Saveetha School of Engineering, SIMATS, Chennai, 602105 India
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Jing Z, Lin Y, Cheng C, Li X, Liu J, Jin T, Hu W, Ma Y, Zhao J, Wang S. Fast Formation of Hydrate Induced by Micro-Nano Bubbles: A Review of Current Status. Processes (Basel) 2023. [DOI: 10.3390/pr11041019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023] Open
Abstract
Hydrate-based technologies have excellent application potential in gas separation, gas storage, transportation, and seawater desalination, etc. However, the long induction time and the slow formation rate are critical factors affecting the application of hydrate-based technologies. Micro-nano bubbles (MNBs) can dramatically increase the formation rate of hydrates owing to their advantages of providing more nucleation sites, enhancing mass transfer, and increasing the gas–liquid interface and gas solubility. Initially, the review examines key performance MNBs on hydrate formation and dissociation processes. Specifically, a qualitative and quantitative assembly of the formation and residence characteristics of MNBs during hydrate dissociation is conducted. A review of the MNB characterization techniques to identify bubble size, rising velocity, and bubble stability is also included. Moreover, the advantages of MNBs in reinforcing hydrate formation and their internal relationship with the memory effect are summarized. Finally, combining with the current MNBs to reinforce hydrate formation technology, a new technology of gas hydrate formation by MNBs combined with ultrasound is proposed. It is anticipated that the use of MNBs could be a promising sustainable and low-cost hydrate-based technology.
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Hansen HHWB, Cha H, Ouyang L, Zhang J, Jin B, Stratton H, Nguyen NT, An H. Nanobubble technologies: Applications in therapy from molecular to cellular level. Biotechnol Adv 2023; 63:108091. [PMID: 36592661 DOI: 10.1016/j.biotechadv.2022.108091] [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: 12/02/2022] [Accepted: 12/27/2022] [Indexed: 12/31/2022]
Abstract
Nanobubbles are gaseous entities suspended in bulk liquids that have widespread beneficial usage in many industries. Nanobubbles are already proving to be versatile in furthering the effectiveness of disease treatment on cellular and molecular levels. They are functionalized with biocompatible and stealth surfaces to aid in the delivery of drugs. At the same time, nanobubbles serve as imaging agents due to the echogenic properties of the gas core, which can also be utilized for controlled and targeted delivery. This review provides an overview of the biomedical applications of nanobubbles, covering their preparation and characterization methods, discussing where the research is currently focused, and how they will help shape the future of biomedicine.
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Affiliation(s)
- Helena H W B Hansen
- Queensland Micro and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia
| | - Haotian Cha
- Queensland Micro and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia
| | - Lingxi Ouyang
- Queensland Micro and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia
| | - Jun Zhang
- Queensland Micro and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia
| | - Bo Jin
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Helen Stratton
- School of Environment and Science, Griffith University, Nathan, QLD 4111, Australia
| | - Nam-Trung Nguyen
- Queensland Micro and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia.
| | - Hongjie An
- Queensland Micro and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia.
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Prakash R, Lee J, Moon Y, Pradhan D, Kim SH, Lee HY, Lee J. Experimental Investigation of Cavitation Bulk Nanobubbles Characteristics: Effects of pH and Surface-Active Agents. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:1968-1986. [PMID: 36692411 DOI: 10.1021/acs.langmuir.2c03027] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Nanobubbles (NBs) have a widespread application in antimicrobial activity, wastewater treatment, and ecological restoration due to numerous peculiar characteristics, such as small diameter, long-term stability, and ability to produce hydroxyl radicals. Despite significant applications, only limited comprehensive investigations are available on the role of surfactants and pH in NBs characteristics. Therefore, this study examines the effects of different surfactants (i.e., anionic, cationic, and nonionic) and pH medium on bulk NB formation, diameter, concentration, bubble size distribution (BSD), ζ-potential, and stability. The effect of surfactant at concentrations above and below the critical micelle concentration was investigated. NBs were generated in deionized (DI) water using a piezoelectric transducer. The stability of NBs was assessed by tracking the variation in diameter and concentration over time. In a neutral medium, the diameter of NBs is smaller than in other surfactant or pH mediums. The diameter, concentration, BSD, and stability of NBs are strongly influenced by the ζ-potential rather than the solution medium. BSD curve shifts to a smaller bubble diameter when the magnitude of ζ-potential is high in any solution. In pure water, surfactant, and pH mediums, NBs have existed for a long time. NBs have a shorter life span in environments with a pH ≤ 3. Surfactant adsorption on the surface of NBs increases with increasing surfactant concentration up to a certain limit, beyond which it declines substantially. The Derjaguin-Landau-Verwey-Overbeek (DLVO) theory was used to interpret the NBs stability, resulting in a total potential energy barrier that is positive and greater than 45.55 kBT for 6 ≤ pH ≤ 11, whereas for pH < 6, the potential energy barrier essentially vanishes. Moreover, an effort has also been made to explicate the plausible prospect of ion distribution and its alignment surrounding NBs in cationic and anionic surfactants. This study will extend the in-depth investigation of NBs for industrial applications involving NBs.
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Affiliation(s)
- Ritesh Prakash
- Microfluidic Convergence Laboratory, Institute of Quantum Biophysics, Sungkyunkwan University, Suwon16419, Republic of Korea
| | - Jinseok Lee
- Microfluidic Convergence Laboratory, School of Mechanical Engineering, Sungkyunkwan University, Suwon16419, Republic of Korea
| | - Youngkwang Moon
- Microfluidic Convergence Laboratory, School of Mechanical Engineering, Sungkyunkwan University, Suwon16419, Republic of Korea
| | - Diva Pradhan
- Microfluidic Convergence Laboratory, School of Mechanical Engineering, Sungkyunkwan University, Suwon16419, Republic of Korea
| | - Seung-Hyun Kim
- School of Engineering, Brown University, Providence, Rhode Island02912, United States
| | - Ho-Yong Lee
- Department of Material Science and Engineering, Sunmoon University, Asan31460, Republic of Korea
| | - Jinkee Lee
- Microfluidic Convergence Laboratory, Institute of Quantum Biophysics, Sungkyunkwan University, Suwon16419, Republic of Korea
- Microfluidic Convergence Laboratory, School of Mechanical Engineering, Sungkyunkwan University, Suwon16419, Republic of Korea
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Uchida T, Fukushi Y. Effect of Polyphenols on the Ice-Nucleation Activity of Ultrafine Bubbles. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:205. [PMID: 36616115 PMCID: PMC9823398 DOI: 10.3390/nano13010205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 12/18/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
Ultrafine bubbles (UFBs) in water provide a large amount of gas and a large gas-liquid interfacial area, and can release energy through their collapse. Such features may promote ice nucleation. Here, we examined the nucleation of ice in solutions containing polyphenols and UFBs. To reduce the likelihood of nucleation occurring on the container walls over that in previous studies, we used a much larger sample volume of 1 mL. In our experiments, UFBs (when present) had a number concentration of 108 mL-1. We quantified changes to the nucleation activity by examining the shift in the cumulative freezing (nucleation) probability distribution. Compared to pure water, this freezing curve shifts approximately 0.6 °C higher with the UFBs. Then, to the water, we added three polyphenols (tannic acid TA, tea catechin TC, and oligonol OLG), chosen because they had been reported to reduce the ice-nucleation activity of heterogeneous ice nuclei (e.g., AgI). We found experimentally that, without UFBs, all polyphenols instead shift the pure-water freezing curve to a higher temperature. Then, when UFBs are added, the additional temperature shift in the freezing curve is slightly higher for OLG, essentially unchanged for TA, and slightly lower for TC. To help to explain these differences, we examined the UFB size distributions using dynamic light scattering and freeze-fractured replicas with transmission electron microscopy, finding that OLG and TC alter the UFBs, but that TA does not.
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Affiliation(s)
- Tsutomu Uchida
- Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Yukiharu Fukushi
- Faculty of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
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Bai M, Liu Z, Zhan L, Yuan M, Yu H. Effect of pore size distribution and colloidal fines of porous media on the transport behavior of micro-nano-bubbles. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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13
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Hong SN, Ri JH, Mun SY, Yu CJ. Revealing the influence of porosity and temperature on transport properties of nanobubble solution with molecular dynamics simulations. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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14
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Sun X, Chen J, Fan W, Liu S, Kamruzzaman M. Production of Reactive Oxygen Species via Nanobubble Water Improves Radish Seed Water Absorption and the Expression of Aquaporin Genes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:11724-11731. [PMID: 36103666 DOI: 10.1021/acs.langmuir.2c01860] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Nanobubbles (NBs) stimulate seed germination; however, the mechanism of the promotion effect of NBs remains unclear. The impact of NBs on seed water absorption was investigated; we subsequently studied the genes associated with the response of radish seeds to NB water and used RNA sequencing to generate their expression profiles, especially those of aquaporin genes. NB water significantly promoted germination. The times at which 50% of the germinating seeds achieved germination (T50) for the submerged radish seeds in NB and control water were 11.6 and 17.4 h, respectively. NB water-germinated radish seeds showed a water uptake rate coefficient that was 15% higher than that of those germinated in control water. Through GO enrichment and cluster analyses, it was evident that NB water significantly increased the level of expression of the genes associated with the following activities: oxidoreductase, peroxidase, and antioxidant. Our results demonstrated that NB water increases the water uptake rate of radish seeds via two mechanisms. The NB water-produced exogenous hydroxyl radical (•OH) increases the seed coat's water permeability and enhances cell wall loosening, and NB water increases the aquaporin gene expression level of radish seeds.
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Affiliation(s)
- Xiaohong Sun
- Institute of Biotechnology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Jingrao Chen
- Institute of Biotechnology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Wenhong Fan
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, China
| | - Shu Liu
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, China
| | - Mohammed Kamruzzaman
- Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, 1304 West Pennsylvania Avenue, Urbana, Illinois 61801, United States
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15
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Inami W, Hara N, Kawata Y, Kobayashi H, Fujita T. High resolution imaging of ultrafine bubbles in water by Atmospheric SEM-CL. Micron 2022; 162:103351. [PMID: 36174306 DOI: 10.1016/j.micron.2022.103351] [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: 06/06/2022] [Revised: 08/31/2022] [Accepted: 09/15/2022] [Indexed: 11/17/2022]
Abstract
Various analytical methods such as high-resolution observation of ultrafine bubbles in water are required to clarify the mechanisms and interrelationships of various effects brought about by ultrafine bubbles. In this study, we used atmospheric scanning electron microscopy-cathodoluminescence (ASEM-CL) method for observing ultrafine bubbles in water. ASEM can observe samples in water, and the fine electron beam provides high spatial resolution. Furthermore, the gas in the bubble can be estimated from the CL emission spectrum. We have measured characteristics such as bubble size and particle number density. Also, the CL spectra has shown that the ultrafine bubbles contained nitrogen.
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Affiliation(s)
- Wataru Inami
- Shizuoka University, Graduate School of Science and Technology, Hamamatsu 4328561, Japan; Shizuoka University, Research Institute of Electronics, Hamamatsu 4328011, Japan.
| | - Naoto Hara
- Shizuoka University, Graduate School of Science and Technology, Hamamatsu 4328561, Japan
| | - Yoshimasa Kawata
- Shizuoka University, Graduate School of Science and Technology, Hamamatsu 4328561, Japan; Shizuoka University, Research Institute of Electronics, Hamamatsu 4328011, Japan
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16
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Proliferative effects of nanobubbles on fibroblasts. Biomed Eng Lett 2022; 12:393-400. [PMID: 36238371 PMCID: PMC9550906 DOI: 10.1007/s13534-022-00242-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 06/29/2022] [Accepted: 07/19/2022] [Indexed: 11/27/2022] Open
Abstract
In recent years, the potential of nanobubbles (NBs) for biological activation has been actively investigated. In this study, we investigated the proliferative effects of nitrogen NBs (N-NBs) on fibroblast cells using cell assays with image analysis and flow cytometry. A high concentration of N-NBs (more than 4 × 108 NBs/mL) was generated in Dulbecco’s modified Eagle’s medium (DMEM) using a gas–liquid mixing method. In image analysis, the cells were counted and compared, which showed an 11% increase in cell number in the culture medium with N-NBs. However, in two further cell cytometry analyses, the effect of nanobubbles on cell division was found to be insignificant (approximately 2%); as there is insufficient evidence that N-NB is involved in cell division mechanism, further studies are needed to determine whether NB affects other cellular mechanisms such as apoptosis. This study presents the first successful attempt of directly generating and quantifying N-NBs in a culture medium for cell culture. The findings suggest that the N-NBs in the culture medium can potentially facilitate cell proliferation.
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17
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Ulatowski K, Wierzchowski K, Fiuk J, Sobieszuk P. Effect of Nanobubble Presence on Murine Fibroblasts and Human Leukemia Cell Cultures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:8575-8584. [PMID: 35776689 PMCID: PMC9301908 DOI: 10.1021/acs.langmuir.2c00819] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Nanobubbles can enhance both the proliferation and metabolic activity of microorganisms (mainly bacteria) and the growth of the whole higher organisms such as mice, fish, or plants. The critical fact is that nanobubbles of different gases can affect given cells differently. As animal cell cultures are used in industry and research studies, investigations of their interactions with nanobubbles should be carried out. This study aims to uncover whether the presence of nanobubbles improves the proliferation rate and metabolic activity of L929 fibroblasts and HL60 leukemia cells as exemplary animal cell lines of adherent and non-adherent cells, respectively. The long-term (8-day) cultures of both L929 and HL-60 cells with nanobubble addition to the appropriate medium were carried out. The medium was not exchanged for the whole duration of the culture. Nanobubbles of two gases - oxygen and nitrogen - were dispersed in the appropriate media and then used to culture cells. The density and viability of cells were assessed microscopically while their metabolic activity was determined using PrestoBlue or XTT assays. Additionally, we have performed the analysis of substrate consumption rate during the growth and activity of lactate dehydrogenase. We have shown that nanodispersion of both gases enhances the proliferation rate and metabolic activity of L929. For HL-60 cultures, reference cultures exhibited better viability, cell density, and metabolic activity than those with either oxygen or nitrogen nanobubbles. Obtained results clearly show that nanobubble dispersions of both oxygen and nitrogen positively affect the cultures of L929 while inhibiting the growth of HL-60 cells. We suspect that a similar positive effect would be visible for other adherent cells, similar to L929. Such results are promising for intensifying the growth of animal or human cells in routine cell cultures.
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18
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Pal P, Anantharaman H. CO2 nanobubbles utility for enhanced plant growth and productivity: Recent advances in agriculture. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2022.102008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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Babu KS, Amamcharla JK. Generation methods, stability, detection techniques, and applications of bulk nanobubbles in agro-food industries: a review and future perspective. Crit Rev Food Sci Nutr 2022; 63:9262-9281. [PMID: 35467989 DOI: 10.1080/10408398.2022.2067119] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Nanobubble (NB) technologies have received considerable attention for various applications due to their low cost, eco-friendliness, scale-up potential, process control, and unique physical characteristics. NB stands for nanoscopic gaseous cavities, typically <1 μm in diameter. NBs can exist on surfaces (surface or interfacial NBs) and be dispersed in a bulk liquid phase (bulk NBs). Compared to the microbubbles, NBs exhibit high specific surface area, negative surface charge, and better adsorption. Bulk NBs can be generated by hydrodynamic/acoustic cavitation, electrolysis, water-solvent mixing, nano-membrane filtration, and so on. NBs exhibit extraordinary longevity compared to microbubbles, prompting the interest of the scientific community aiming for potential applications including medicine, agriculture, food, wastewater treatment, surface cleaning, and so on. Based on the limited amount of research work available regarding the influence of NBs on food matrices, further research, however, needs to be done to provide more insights into its applications in food industries. This review provides an overview of the generation methods for NBs, techniques to evaluate them, and a discussion of their stability and several applications in various fields of science were discussed. However, recent studies have revealed that, despite the many benefits of NB technologies, several NB generating approaches are still limited in their application in specific agro-food industries. Further study should focus on process optimization, integrating various NB generation techniques/combining with other emerging technologies in order to achieve rapid technical progress and industrialization of NB-based technologies.HighlightsNanobubbles (NBs) are stable spherical entities of gas within liquid and are operationally defined as having diameters less than 1 µm.Currently, various reported theories still lack the ability to explain the evidence and stability of NBs in water, numerous NB applications have emerged due to the unique properties of NBs.NB technologies can be applied to various food and dairy products (e.g. yogurt and ice cream) and other potential applications, including agriculture (e.g. seed germination and plant growth), wastewater treatment, surface cleaning, and so on.
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Affiliation(s)
- Karthik S Babu
- Department of Animal Sciences and Industry/Food Science Institute, Kansas State University, Manhattan, Kansas, USA
| | - Jayendra K Amamcharla
- Department of Animal Sciences and Industry/Food Science Institute, Kansas State University, Manhattan, Kansas, USA
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20
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Abstract
Nanobubbles are nanoscopic gaseous domains than can exist on solid surfaces or in bulk liquids. They have attracted significant attention in the last decade due to their long-time (meta)stability and ready potential for real-world applications, especially in environmental engineering and more sustainable ecosystems, water treatment, irrigation, and crop growth. After reviewing important nano-bubble science and activity, with some of the latest promising results in agriculture, we point out important directions in applications of nano-bubble phenomena for boosting sustainability, with viewpoints on how to revolutionise best-practice environmental and green sustainability, taking into account economic drivers and impacts. More specifically, it is pointed out how nanobubbles may be used as delivery vehicles, or “nano-carriers”, for nutrients or other agents to specific targets in a variety of ecosystems of environmental relevance, and how core this is to realising a vision of ultra-dense NBs in shaping a positive and lasting impact on ecosystems and our natural environment.
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21
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Application of Micro- and Nano-Bubbles as a Tool to Improve the Rheological and Microstructural Properties of Formulated Greek-Style Yogurts. Foods 2022; 11:foods11040619. [PMID: 35206095 PMCID: PMC8871219 DOI: 10.3390/foods11040619] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/11/2022] [Accepted: 02/17/2022] [Indexed: 11/17/2022] Open
Abstract
The objective of this study was to develop an alternative novel process technology for enhancing the rheological and functional properties of Greek-style yogurt (GSY). The GSY was formulated and prepared in the lab using micellar casein concentrate as a source of protein to achieve a protein content of 10% (w/w). The changes in physicochemical, microstructural, rheological, and functional properties of control (C-GSY) and micro- and nano-bubbles-treated GSY (MNB-GSY) were studied and compared before and after storage for 1, 2, 3, and 4 weeks. Before storage, the apparent viscosity at 100 s−1 (η100) was 1.09 Pa·s for C-GSY and 0.71 Pa·s for MNB-GSY. Incorporation of MNBs into GSY significantly (p < 0.05) decreased the η100 by 30% on 1 week of storage. Additionally, the η100 of MNB-GSY was lesser than C-GSY on week 2, 3, and 4 of storage. Notable microstructural changes and significant rheological differences were observed between the C-GSY and MNB-GSY samples. Differences were also noticed in syneresis, which was lower for the MNB-GSY compared with the control. Overall, the incorporation of MNBs into GSY showed considerable improvements in rheological and functional properties. Additionally, it’s a simple, cost-effective process to implement in existing GSY production plants.
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22
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Affiliation(s)
- Ananda J. Jadhav
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Mostafa Barigou
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
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23
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Wang Y, Wang S, Sun J, Dai H, Zhang B, Xiang W, Hu Z, Li P, Yang J, Zhang W. Nanobubbles promote nutrient utilization and plant growth in rice by upregulating nutrient uptake genes and stimulating growth hormone production. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 800:149627. [PMID: 34426308 DOI: 10.1016/j.scitotenv.2021.149627] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 08/05/2021] [Accepted: 08/09/2021] [Indexed: 06/13/2023]
Abstract
Excessive application of chemical fertilizers can lead to serious environmental problems. In this study, we explored the use of nanobubble water for irrigation of crop rice as a means of reducing fertilizer use. The effect of nanobubbles on plant growth and nutrient uptake was evaluated in the laboratory, while crop yield and the efficiency of fertilizer use were evaluated in a field study. The laboratory experiments indicated that nanobubbles significantly improve plant height and root length in rice seedlings. Nanobubble treatment stimulated synthesis of the growth hormone gibberellin and upregulated the plant nutrient absorption genes OsBT, PiT-1 and SKOR, resulting in increased nutrient uptake and utilization by the roots. The field experiments verified the laboratory observations, showing that nanobubble treatment significantly increases rice yield by almost 8% when using similar levels of fertilizer as controls. Moreover, the same yield as controls was achieved with approximately 25% less fertilizer. As well as their impact on growth hormones and nutrient absorption genes, nanobubbles, due to hydrophobic and surface charge properties, enhance the release and absorption of soil nutrients, thereby reducing fertilizer demand. Overall, this study highlights a new and sustainable water irrigation strategy for enhancing crop yield and reducing chemical fertilizer waste.
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Affiliation(s)
- Ying Wang
- Research Center for Ecological Science and Technology, Fudan Zhangjiang Institute, 351 Guoshoujing Road, Shanghai 201203, China; Ministry of Education, Key Laboratory for Biodiversity Science and Ecological Engineering, Department of Ecology and Evolutionary Biology, School of Life Sciences, Fudan University, 2005 Songhu Road, Shanghai 200438, China.
| | - Shuo Wang
- School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Jingjing Sun
- Shanghai Jincui Agriculture Company, Jinyang Road, Yangwan Village, Shanghai 201718, China
| | - Hengren Dai
- Shanghai Jincui Agriculture Company, Jinyang Road, Yangwan Village, Shanghai 201718, China
| | - Beijun Zhang
- Shanghai Jincui Agriculture Company, Jinyang Road, Yangwan Village, Shanghai 201718, China
| | - Weidong Xiang
- Research Center for Ecological Science and Technology, Fudan Zhangjiang Institute, 351 Guoshoujing Road, Shanghai 201203, China
| | - Zixin Hu
- State Key Laboratory of Genetic Engineering and Innovation Center of Genetics and Development, School of Life Sciences, Fudan University, 2005 Songhu Road, Shanghai 200438, China; Human Phenome Institute, Fudan University, 825 Zhangheng Road, Shanghai 201203, China
| | - Pan Li
- School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China.
| | - Jinshui Yang
- State Key Laboratory of Genetic Engineering, Institute of Genetics, School of Life Sciences, Fudan University, 2005 Songhu Road, Shanghai 200438, China
| | - Wen Zhang
- Department of Civil and Environmental Engineering, New Jersey Institute of Technology, Newark, NJ 07102, United States
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24
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Renard C, Leclercq L, Cottet H. Generation and characterization of air micro-bubbles in highly hydrophobic capillaries. Electrophoresis 2021; 43:767-775. [PMID: 34752637 DOI: 10.1002/elps.202100171] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 08/07/2021] [Accepted: 10/04/2021] [Indexed: 11/12/2022]
Abstract
The generation of air microbubbles in microfluidic systems or in capillaries could be of great interest for transportation (single cell analysis, organite transportation) or for liquid compartmentation. The physicochemical characterization of air bubbles and a better understanding of the process leading to bubble generation during electrophoresis is also interesting in a theoretical point of view. In this work, the generation of microbubbles on hydrophobic Glaco™ coated capillaries has been studied in water-based electrolyte. Air bubbles were generated at the detection window and the required experimental parameters for microbubbles generation have been identified. Generated bubbles migrated against the electroosmotic flow, as would do strongly negatively charged solutes, under constant electric field. They have been characterized in terms of dimensions, electrophoretic mobility, and apparent charge.
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Affiliation(s)
- Charly Renard
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France
| | - Laurent Leclercq
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France
| | - Hervé Cottet
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France
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25
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Soyluoglu M, Kim D, Zaker Y, Karanfil T. Stability of Oxygen Nanobubbles under Freshwater Conditions. WATER RESEARCH 2021; 206:117749. [PMID: 34678695 DOI: 10.1016/j.watres.2021.117749] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 10/03/2021] [Accepted: 10/06/2021] [Indexed: 06/13/2023]
Abstract
The use of nanobubbles (NBs) has gained significant attention in various applications (e.g., aeration in biological water treatment, water disinfection, membrane defouling, and ground water and sediment remediation) in recent decades because of their superior characteristics such as the improved mass transfer at the gas-liquid interfaces, their lifetime up to a couple of weeks, the formation of reactive oxygen species (ROS) with high oxidative potential. However, there is a lack of information about the effect of various factors on the stability of NBs for a long storage period under freshwater conditions. In this study, a comprehensive investigation was conducted to systematically examine the stability of oxygen NBs in water under various conditions which are closely related to a typical freshwater or the drinking water treatment. The oxygen NB stability in water was evaluated by monitoring the change in the bubble concentrations, size distribution, average diameter, and zeta potential for 60 days of storage time under different pH, hardness, ionic strength, natural organic matter (NOM), chlorine, and temperature conditions. In addition, the formation of hydroxyl radical (•OH) was investigated using disodium terephthalate which form fluorescent adducts with •OH in the presence of oxygen NBs. Among the parameters investigated, the impacts of cations, low pH, and high SUVA254 NOM on the stability of oxygen NBs were more significant than other conditions. The half-lives of oxygen NBs under various conditions follow the order Ca2+ < Na+ < pH 3 < high SUVA254 NOM < pH 5 < 30 °C. Oxygen NBs were more stable in softwater than hardwater. Oxygen NBs were relatively stable for 3 days regardless of pH. For a longer storage period, oxygen NBs disappeared faster at pH 3 than at high pH. High SUVA254 NOM destabilized NBs more than low SUVA254 NOM, indicating the impact of hydrophobicity on the NB stability. The temperature effect on the NB stability was negligible for a short storage time, while higher temperature destabilized oxygen NBs for a longer storage time. One of the main disappearance pathway of oxygen NBs in water was found to be coalescing, rising, and leaving the container, which would be promoted greatly by cations, low pH and NOM with high aromaticity. The formation of hydroxyl radical in NB solutions was detected at pH 3 by a florescent probe molecule. When oxygen NBs are released in water bodies, high calcium, high SUVA254 NOM, and low pH would significantly reduce the availability of NBs and their residence time in freshwater.
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Affiliation(s)
- Meryem Soyluoglu
- Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, SC 29625 United States of America
| | - Daekyun Kim
- Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, SC 29625 United States of America
| | - Yeakub Zaker
- Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, SC 29625 United States of America
| | - Tanju Karanfil
- Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, SC 29625 United States of America.
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26
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Kyzas GZ, Mitropoulos AC. From Bubbles to Nanobubbles. NANOMATERIALS 2021; 11:nano11102592. [PMID: 34685033 PMCID: PMC8540996 DOI: 10.3390/nano11102592] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 09/21/2021] [Accepted: 09/29/2021] [Indexed: 01/04/2023]
Abstract
Nanobubbles are classified into surface and bulk. The main difference between them is that the former is immobile, whereas the latter is mobile. The existence of sNBs has already been proven by atomic force microscopy, but the existence of bNBs is still open to discussion; there are strong indications, however, of its existence. The longevity of NBs is a long-standing problem. Theories as to the stability of sNBs reside on their immobile nature, whereas for bNBs, the landscape is not clear at the moment. In this preliminary communication, we explore the possibility of stabilizing a bNB by Brownian motion. It is shown that a fractal walk under specific conditions may leave the size of the bubble invariant.
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27
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Ito M, Sugai Y. Nanobubbles activate anaerobic growth and metabolism of Pseudomonas aeruginosa. Sci Rep 2021; 11:16858. [PMID: 34413439 PMCID: PMC8376943 DOI: 10.1038/s41598-021-96503-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 08/09/2021] [Indexed: 11/09/2022] Open
Abstract
The effect of nanobubbles on anaerobic growth and metabolism of Pseudomonas aeruginosa was investigated. P. aeruginosa grew earlier in the culture medium containing nanobubbles and the bacterial cell concentration in that culture medium was increased a few times higher compared to the medium without nanobubbles under anaerobic condition. Both gas and protein, which are the metabolites of P. aeruginosa, were remarkably produced in the culture medium containing nanobubbles whereas those metabolites were little detected in the medium without nanobubbles, indicating nanobubbles activated anaerobic growth and metabolism of P. aeruginosa. The carbon dioxide nanobubbles came to be positively charged by adsorbing cations and delivered ferrous ions, one of the trace essential elements for bacterial growth, to the microbial cells, which activated the growth and metabolism of P. aeruginosa. The oxygen nanobubbles activated the activities of P. aeruginosa as an oxygen source.
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Affiliation(s)
- Miu Ito
- Department of Earth Resources Engineering, Graduate School of Engineering, Kyushu University, 744, Motooka, Nishiku, Fukuoka, 8190395, Japan
| | - Yuichi Sugai
- Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, 744, Motooka, Nishiku, Fukuoka, 8190395, Japan.
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28
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Fan Y, Yang X, Lei Z, Zhang Z, Kobayashi M, Adachi Y, Shimizu K. Alleviation of ammonia inhibition via nano-bubble water supplementation during anaerobic digestion of ammonia-rich swine manure: Buffering capacity promotion and methane production enhancement. BIORESOURCE TECHNOLOGY 2021; 333:125131. [PMID: 33894452 DOI: 10.1016/j.biortech.2021.125131] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 03/28/2021] [Accepted: 04/01/2021] [Indexed: 06/12/2023]
Abstract
Anaerobic digestion (AD) of ammonia-rich swine manure (SM) with nano-bubble water (NBW) supplementation was studied in this work with the expectation of ammonia inhibition alleviation, buffering capacity promotion, and methane production enhancement. Results indicated that cumulative methane yield was elevated by 12.3-38.7% in NBW groups. Besides, the reduced methane production rate and elongated lag phase under ammonia inhibition were increased and shortened by NBW supplementation, respectively. The rapid increase of total alkalinity (TA) and partial alkalinity (PA) could be observed with NBW supplementation, as well as the rapid decline of VFA/TA, thus improved buffering capacity and alleviated ammonia inhibition. Moreover, higher level of extracellular hydrolases and coenzyme F420 could be detected in NBW groups. In conclusion, NBW with higher mobility and zeta potential (absolute value) could be a promising strategy for the alleviation of ammonia suppression during the AD of SM.
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Affiliation(s)
- Yujie Fan
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Xiaojing Yang
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Zhongfang Lei
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Zhenya Zhang
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Motoyoshi Kobayashi
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Yasuhisa Adachi
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Kazuya Shimizu
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
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29
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Phan K, Truong T, Wang Y, Bhandari B. Effect of CO
2
nanobubbles incorporation on the viscosity reduction of fruit juice concentrate and vegetable oil. Int J Food Sci Technol 2021. [DOI: 10.1111/ijfs.15240] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Khanh Phan
- School of Agriculture and Food Sciences The University of Queensland Brisbane Queensland 4072 Australia
| | - Tuyen Truong
- School of Agriculture and Food Sciences The University of Queensland Brisbane Queensland 4072 Australia
- School of Science RMIT University Melbourne Victoria 3083 Australia
| | - Yong Wang
- School of Chemical Engineering The University of New South Wales Sydney New South Wales 2052 Australia
| | - Bhesh Bhandari
- School of Agriculture and Food Sciences The University of Queensland Brisbane Queensland 4072 Australia
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30
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Wu J, Zhang K, Cen C, Wu X, Mao R, Zheng Y. Role of bulk nanobubbles in removing organic pollutants in wastewater treatment. AMB Express 2021; 11:96. [PMID: 34184137 PMCID: PMC8239109 DOI: 10.1186/s13568-021-01254-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 06/15/2021] [Indexed: 02/06/2023] Open
Abstract
The occurrence of a variety of organic pollutants has complicated wastewater treatment; thus, the search for sustainable and effective treatment technology has drawn significant attention. In recent years, bulk nanobubbles, which have extraordinary properties differing from those of microbubbles, including high stability and long residence times in water, large specific surface areas, high gas transfer efficiency and interface potential, and the capability to generate free radicals, have shown attractive technological advantages and promising application prospects for wastewater treatment. In this review, the basic characteristics of bulk nanobubbles are summarized in detail, and recent findings related to their implementation pathways and mechanisms in organic wastewater treatment are systematically discussed, which includes improving the air flotation process, increasing water aeration to promote aerobic biological technologies including biological activated carbon, activated sludge, and membrane bioreactors, and generating active free radicals that oxidise organic compounds. Finally, the current technological difficulties of bulk nanobubbles are analysed, and future focus areas for research on bulk nanobubble technology are also proposed.
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Affiliation(s)
- Jiajia Wu
- College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 310058 China
| | - Kejia Zhang
- College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 310058 China
| | - Cheng Cen
- College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 310058 China
| | - Xiaogang Wu
- College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 310058 China
| | - Ruyin Mao
- College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 310058 China
| | - Yingying Zheng
- College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 310058 China
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31
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Dhungana P, Bhandari B. Development of a continuous membrane nanobubble generation method applicable in liquid food processing. Int J Food Sci Technol 2021. [DOI: 10.1111/ijfs.15182] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pramesh Dhungana
- ARC Dairy Innovation Hub School of Agriculture and Food Sciences The University of Queensland St Lucia QLD‐4072 Australia
| | - Bhesh Bhandari
- ARC Dairy Innovation Hub School of Agriculture and Food Sciences The University of Queensland St Lucia QLD‐4072 Australia
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32
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Jadhav AJ, Ferraro G, Barigou M. Generation of Bulk Nanobubbles Using a High-Shear Rotor–Stator Device. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c01233] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ananda J. Jadhav
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K
| | - Gianluca Ferraro
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K
| | - Mostafa Barigou
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K
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33
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Chuenchart W, Karki R, Shitanaka T, Marcelino KR, Lu H, Khanal SK. Nanobubble technology in anaerobic digestion: A review. BIORESOURCE TECHNOLOGY 2021; 329:124916. [PMID: 33730622 DOI: 10.1016/j.biortech.2021.124916] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/22/2021] [Accepted: 02/24/2021] [Indexed: 06/12/2023]
Abstract
Nanobubble technology has significant potential to improve the anaerobic digestion (AD) process by ameliorating the rate-limiting steps of hydrolysis and methanogenesis, as well as providing process stability by reducing sulfide and volatile fatty acid (VFA) levels. Nanobubbles (NB) can enhance substrate accessibility, digestibility, and enzymatic activity due to their minuscule size, high electrostatic interaction, and ability to generate reactive oxygen species. Air- and O2-NB can create a microaerobic environment for higher efficiency of the electron transport system, thereby reducing VFAs through enhanced facultative bacterial activity. Additionally, H2- and CO2-NB can improve hydrogenotrophic methanogenesis. Recently, several studies have employed NB technology in the AD process. There is, however, a lack of concise, synthesized information on NB applications to the AD process. This review provides an in-depth discussion on the NB-integrated AD process and the putative mechanisms involved. General discussions on other potential applications and future research directions are also provided.
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Affiliation(s)
- Wachiranon Chuenchart
- Department of Civil and Environmental Engineering, University of Hawai'i at Mānoa, 2540 Dole Street, Honolulu, HI 96822, United States
| | - Renisha Karki
- Department of Molecular Biosciences and Bioengineering, University of Hawai'i at Mānoa, 1955 East-West Road, Honolulu, HI 96822, United States
| | - Ty Shitanaka
- Department of Molecular Biosciences and Bioengineering, University of Hawai'i at Mānoa, 1955 East-West Road, Honolulu, HI 96822, United States
| | - Kyle Rafael Marcelino
- Department of Civil and Environmental Engineering, University of Hawai'i at Mānoa, 2540 Dole Street, Honolulu, HI 96822, United States
| | - Hui Lu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, China
| | - Samir Kumar Khanal
- Department of Civil and Environmental Engineering, University of Hawai'i at Mānoa, 2540 Dole Street, Honolulu, HI 96822, United States; Department of Molecular Biosciences and Bioengineering, University of Hawai'i at Mānoa, 1955 East-West Road, Honolulu, HI 96822, United States.
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34
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Mechanical Strength and Hydration Characteristics of Cement Mixture with Highly Concentrated Hydrogen Nanobubble Water. MATERIALS 2021; 14:ma14112735. [PMID: 34067284 PMCID: PMC8196820 DOI: 10.3390/ma14112735] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 05/15/2021] [Accepted: 05/19/2021] [Indexed: 11/27/2022]
Abstract
In this study, highly concentrated hydrogen nanobubble water was utilized as the blending water for cement mortar to improve its compressive and flexural strengths. Highly concentrated nanobubbles can be obtained through osmosis. This concentration was maintained by sustaining the osmotic time. The mortar specimens were cured for 28 days, in which the nanobubble concentration was increased. This improved their flexural strength by 2.25–13.48% and compressive strength by 6.41–11.22%, as compared to those afforded by plain water. The nanobubbles were densified at high concentrations, which caused a decrease in their diameter. This increased the probability of collisions with the cement particles and accelerated the hydration and pozzolanic reactions, which facilitated an increase in the strength of cement. Thermogravimetric analysis and scanning electron microscopy were used to confirm the development of calcium silicate hydrate (C-S-H) and hydration products with an increase in the nanobubble concentration. Quantitative analysis of the hydration products and the degree of hydration were calculated by mineralogical analysis.
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35
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Kim TK, Kim T, Lee I, Choi K, Zoh KD. Removal of tetramethylammonium hydroxide (TMAH) in semiconductor wastewater using the nano-ozone H 2O 2 process. JOURNAL OF HAZARDOUS MATERIALS 2021; 409:123759. [PMID: 33451854 DOI: 10.1016/j.jhazmat.2020.123759] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 08/13/2020] [Accepted: 08/19/2020] [Indexed: 06/12/2023]
Abstract
In this study, we used a nano-ozone bubble to enhance the efficiency of the ozone/H2O2 process for the degradation of tetramethylammonium hydroxide (TMAH) found in semiconductor wastewater at high levels. The nano-ozone bubble significantly increased ozone mass transfer rate compared to that of the macro-ozone bubble. The half-life of nano-ozone bubbles was 23 times longer than that of the nano-ozone bubbles. Due to the high ozone mass transfer rate and its durability, the nano-ozone bubble increased the TMAH degradation rate compared to that of the macro-ozone. The addition of H2O2 significantly increased the TMAH degradation rate constant by OH production during the nano-ozone bubbles/H2O2 process. The optimum conditions for TMAH removal was 25 °C and pH 10. Within 90 min of the nano-ozone/H2O2 process, TOC removal was 65 % while 80 % of nitrogen was converted into nitrate (NO3-) with 95 % of TMAM removal. Decreases in acute (40-fold) and chronic (2-fold) toxicity were achieved after applying the nano-ozone/H2O2 process to TMAH containing wastewater. However, there was no significant chronic toxicity decrease during the nano-ozone/H2O2 process of TMAH.
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Affiliation(s)
- Tae-Kyoung Kim
- Department of Environmental Health Sciences, School of Public Health, Seoul National University, Seoul, Republic of Korea; Environmental Fate and Exposure Research Group, Korea Institute of Toxicology, Jinju, Republic of Korea
| | - Taeyeon Kim
- Department of Environmental Health Sciences, School of Public Health, Seoul National University, Seoul, Republic of Korea
| | - Inae Lee
- Department of Environmental Health Sciences, School of Public Health, Seoul National University, Seoul, Republic of Korea
| | - Kyungho Choi
- Department of Environmental Health Sciences, School of Public Health, Seoul National University, Seoul, Republic of Korea
| | - Kyung-Duk Zoh
- Department of Environmental Health Sciences, School of Public Health, Seoul National University, Seoul, Republic of Korea.
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36
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Takahashi M, Shirai Y, Sugawa S. Free-Radical Generation from Bulk Nanobubbles in Aqueous Electrolyte Solutions: ESR Spin-Trap Observation of Microbubble-Treated Water. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:5005-5011. [PMID: 33857377 DOI: 10.1021/acs.langmuir.1c00469] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Microbubbles are very fine bubbles that shrink and collapse underwater within several minutes, leading to the generation of free radicals. Electron spin resonance spectroscopy (ESR) confirmed the generation of hydroxyl radicals under strongly acidic conditions. The drastic environmental change caused by the collapse of the microbubbles may trigger radical generation via the dispersion of the elevated chemical potential that had accumulated around the gas-water interface. The present study also confirmed the generation of ESR signals from the microbubble-treated waters even after several months had elapsed following the dispersion of the microbubbles. Bulk nanobubbles were expected to be the source of the spin-adducts of hydroxyl radicals. Such microbubble stabilization and conversion might be caused by the formation of solid microbubble shells generated by iron ions in the condensed ionic cloud around the microbubble. Therefore, the addition of a strong acid might cause drastic changes in the environment and destroy the stabilized condition. This would restart the collapsing process, leading to hydroxyl radical generation.
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Affiliation(s)
- Masayoshi Takahashi
- New Industry Creation Hatchery Center, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
| | - Yasuyuki Shirai
- New Industry Creation Hatchery Center, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
| | - Shigetoshi Sugawa
- New Industry Creation Hatchery Center, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
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37
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Fan Y, Yang X, Lei Z, Adachi Y, Kobayashi M, Zhang Z, Shimizu K. Novel insight into enhanced recoverability of acidic inhibition to anaerobic digestion with nano-bubble water supplementation. BIORESOURCE TECHNOLOGY 2021; 326:124782. [PMID: 33535153 DOI: 10.1016/j.biortech.2021.124782] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 01/20/2021] [Accepted: 01/23/2021] [Indexed: 06/12/2023]
Abstract
Nano-bubble water (NBW) has been proven to be effective in promoting organics utilization and CH4 production during anaerobic digestion (AD) process, suggesting its potential in improving the stability of the AD process and thereby alleviating acidic inhibition. In this work, the effect of NBW on digestion stability and CH4 production was investigated to evaluate the ability of NBW on AD recovery from acidic inhibition. Results showed that NBW supplementation increased the total alkalinity (TA) and partial alkalinity (PA), and reduced the ratio of VFA/TA, thus maintained the stability of the AD process. Generation/consumption of VFAs was also enhanced with NBW supplementation under acidic inhibition with pH values of 5.5, 6.0 and 6.5. The cumulative CH4 production was 246-257 mL/g-VS in NBW groups, which was 12.1-17.2% higher than the control. Moreover, with NBW supplementation, the maximum CH4 production rate was raised according to the modeling results.
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Affiliation(s)
- Yujie Fan
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Xiaojing Yang
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Zhongfang Lei
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Yasuhisa Adachi
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Motoyoshi Kobayashi
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Zhenya Zhang
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Kazuya Shimizu
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
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38
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Svetovoy VB. Spontaneous chemical reactions between hydrogen and oxygen in nanobubbles. Curr Opin Colloid Interface Sci 2021. [DOI: 10.1016/j.cocis.2021.101423] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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39
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Aluthgun Hewage S, Batagoda JH, Meegoda JN. Remediation of contaminated sediments containing both organic and inorganic chemicals using ultrasound and ozone nanobubbles. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 274:116538. [PMID: 33540254 DOI: 10.1016/j.envpol.2021.116538] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 01/02/2021] [Accepted: 01/17/2021] [Indexed: 06/12/2023]
Abstract
Most river sediments are contaminated with organic and inorganic pollutants and cause significant environmental damage and health risks. This research is evaluated an in-situ sediment remediation method using ultrasound and ozone nanobubbles to remove organic and inorganic chemicals in contaminated sediments. Contaminated sediment is prepared by mixing synthetic fine sediment with an organic (p-terphenyl) and an inorganic chemical (chromium). The prepared contaminated sediment is treated with ultrasound and ozone nanobubbles under different operating conditions. For the samples with the maximum initial concentration of 4211 mg/kg Cr and 1875 mg/kg p-terphenyl, average removal efficiencies are 71% and 60%, respectively, with 240 min of sonication with 2-min pulses, whereas 97.5% and 91.5% removal efficiencies are obtained for the same, respectively, as a single contaminant in the sediment. For the same maximum concentrations, the highest removal of p-terphenyl is 82.7% with 127.2 J/ml high energy density, and for Cr, it is 77.1% using the highest number of the treatment cycle and ozone usage with 78.75/ml energy density. The Cr highest removal efficiency of 87.2% is recorded with the reduced initial concentration of 1227 mg/kg with the highest treatment cycles. The Cr removal efficiency depends on the availability of oxidizing agents and the number of washing cycles of sediments, whereas P-terphenyl degradation is most likely influenced by the combined effects of oxidation and ultrasound-assisted pyrolysis and combustion of organics.
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Affiliation(s)
- Shaini Aluthgun Hewage
- Department of Civil & Environmental Engineering, New Jersey Institute of Technology, Newark, NJ, 07102, United States
| | - Janitha H Batagoda
- Department of Civil & Environmental Engineering, New Jersey Institute of Technology, Newark, NJ, 07102, United States
| | - Jay N Meegoda
- Department of Civil & Environmental Engineering, New Jersey Institute of Technology, Newark, NJ, 07102, United States.
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40
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Multiplicity of thermodynamic states of van der Waals gas in nanobubbles. Chin J Chem Eng 2021. [DOI: 10.1016/j.cjche.2020.07.056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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41
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Tian Y, Zhang Z, Zhu Z, Sun DW. Effects of nano-bubbles and constant/variable-frequency ultrasound-assisted freezing on freezing behaviour of viscous food model systems. J FOOD ENG 2021. [DOI: 10.1016/j.jfoodeng.2020.110284] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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42
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Hewage SA, Kewalramani J, Meegoda JN. Stability of nanobubbles in different salts solutions. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.125669] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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43
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Xiao L, Sun S, Li K, Lei Z, Shimizu K, Zhang Z, Adachi Y. Effects of nanobubble water supplementation on biomass accumulation during mycelium cultivation of Cordyceps militaris and the antioxidant activities of extracted polysaccharides. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.biteb.2020.100600] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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44
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Lee JI, Yim BS, Kim JM. Effect of dissolved-gas concentration on bulk nanobubbles generation using ultrasonication. Sci Rep 2020; 10:18816. [PMID: 33139819 PMCID: PMC7608667 DOI: 10.1038/s41598-020-75818-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 09/24/2020] [Indexed: 11/24/2022] Open
Abstract
In this study, the effects of dissolved-gas concentration in liquid water on the nucleation and growth of bubbles and nanobubble (NB) generation were investigated by measuring the concentration and size distribution of NBs. Three types of liquids with different dissolved-gas concentrations—undersaturated, saturated, and supersaturated deionized (DI) water—were prepared, and NBs were generated via ultrasonic irradiation. As the dissolved-gas concentration increased, a large number of bubbles with relatively large diameters (several tens of micrometers or more) were generated, but the NB concentration decreased. The surface tension decreased with an increase in the dissolved gas concentration, and thus, the tensile strength which required for bubble growth became lower. Therefore, there were barely any NBs in supersaturated conditions because of the accelerated nucleation and bubble growth.
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Affiliation(s)
- Jeong Il Lee
- School of Mechanical Engineering, Chung-Ang University, Seoul, 156-756, Korea
| | - Byung-Seung Yim
- School of Mechanical System Engineering, Kangwon National University, Gangwon-do, 25913, Korea.
| | - Jong-Min Kim
- School of Mechanical Engineering, Chung-Ang University, Seoul, 156-756, Korea.
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45
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Fan Y, Lei Z, Yang X, Kobayashi M, Adachi Y, Zhang Z, Shimizu K. Effect of nano-bubble water on high solid anaerobic digestion of pig manure: Focus on digestion stability, methanogenesis performance and related mechanisms. BIORESOURCE TECHNOLOGY 2020; 315:123793. [PMID: 32659421 DOI: 10.1016/j.biortech.2020.123793] [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: 05/31/2020] [Revised: 07/01/2020] [Accepted: 07/02/2020] [Indexed: 06/11/2023]
Abstract
In this study, high solid anaerobic digestion of pig manure (PM) under nano-bubble water (NBW) addition was investigated with focus on digestion stability, methanogenesis performance and related mechanisms. Volatile fatty acids (VFAs) inhibition occurred when total solids (TS) was about 8% without NBW addition, which was alleviated with improved digestion stability under NBW addition, facilitating the process of high solids anaerobic digestion (HSAD). The cumulative CH4 yield, on the other hand, was 201-230 mL/g-VS in the NBW reactors at TS of 3-6%, about 20.3-25.0% higher than the control reactors. At the same time, with higher water mobility and zeta potential, NBW was found to promote the consumption of soluble proteins/carbohydrates during the above AD process.
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Affiliation(s)
- Yujie Fan
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Zhongfang Lei
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Xiaojing Yang
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Motoyoshi Kobayashi
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Yasuhisa Adachi
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Zhenya Zhang
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Kazuya Shimizu
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
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46
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Singh A, Sekhon AS, Unger P, Babb M, Yang Y, Michael M. Impact of gas micro-nano-bubbles on the efficacy of commonly used antimicrobials in the food industry. J Appl Microbiol 2020; 130:1092-1105. [PMID: 32889773 DOI: 10.1111/jam.14840] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 08/05/2020] [Accepted: 08/18/2020] [Indexed: 12/21/2022]
Abstract
AIM To study the impact of incorporating micro-nano-bubbles (MNBs) in commonly used food antimicrobials (AMs) against Escherichia coli O157:H7 (EC) and Listeria monocytogenes (LM). METHODS AND RESULTS Air, carbon dioxide (CO2 ) and nitrogen (N2 ) were used to incorporate MNBs in city water. AM solution (with or without MNBs) of 9 ml was individually taken into sterile test tubes and mixed with 1 ml of inoculum grown in brain heart infusion (BHI) broth to get the net AM concentrations of 28·4 ppm peracetic acid (PAA), 200 ppm chlorine (Cl2 ), 5·4% citric acid (CA) and 4·5% lactic acid (LA). After treatment time of 1·5 and 3·0 min, 1 ml of sample was neutralized using Dey-Engley neutralizing broth and plated on BHI agar. For EC, Cl2 -CO2 solutions resulted in significantly greater log reductions (5·2 logs) compared to that of Cl2 solutions without MNBs (3·8 logs). For LM, PAA-CO2 solutions resulted in significantly greater log reductions (4·4 logs) compared to that of PAA solutions without MNBs (1·7 logs). CONCLUSIONS This study demonstrated that the efficacy of Cl2 and PAA AM solutions could be increased by incorporating CO2 -MNBs against EC and LM in microbiological growth medium. SIGNIFICANCE AND IMPACT OF THE STUDY Incorporation of CO2 -MNBs in AM solutions could increase the efficacy of AMs against pathogens on/in food matrices, which should be tested in future research.
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Affiliation(s)
- A Singh
- School of Food Science, Washington State University, Pullman, WA, USA
| | - A S Sekhon
- School of Food Science, Washington State University, Pullman, WA, USA
| | - P Unger
- School of Food Science, Washington State University, Pullman, WA, USA
| | - M Babb
- School of Food Science, Washington State University, Pullman, WA, USA
| | - Y Yang
- School of Food Science, Washington State University, Pullman, WA, USA
| | - M Michael
- School of Food Science, Washington State University, Pullman, WA, USA
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47
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Ghaani MR, English NJ. Kinetic study on electro-nucleation of water in a heterogeneous propane nano-bubble system to form polycrystalline ice I c. J Chem Phys 2020; 153:084501. [PMID: 32872892 DOI: 10.1063/5.0017929] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Elucidating the underlying mechanisms of water solidification in heterogeneous systems is crucially important for a panoply of applications; gaining such an understanding has also proven to be very challenging to the community. Indeed, one such example lies in clarifying the thermodynamics and kinetics of electro-crystallization in heterogeneous systems, such as micro- and nano-bubble systems. Here, we employ non-equilibrium molecular dynamics of water in heterogeneous environments experiencing direct contact with a propane gas phase at various temperatures in externally applied static electric fields, elucidating significant external-field effects in inducing poly-crystalline cubic-ice formation. This is in stark contrast with recent work on homogeneous cubic-ice electro-nucleation to produce largely fault-free single crystals. We explore the kinetics of heterogeneous cubic-ice electro-nucleation under different field intensities and thermal conditions and provide an overview of time-dependent dynamics of evolution of polycrystallinity.
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Affiliation(s)
- Mohammad Reza Ghaani
- School of Chemical and Bioprocess Engineering, University College Dublin, Belfield, Dublin 4, Ireland
| | - Niall J English
- School of Chemical and Bioprocess Engineering, University College Dublin, Belfield, Dublin 4, Ireland
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48
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Ferraro G, Jadhav AJ, Barigou M. A Henry's law method for generating bulk nanobubbles. NANOSCALE 2020; 12:15869-15879. [PMID: 32696779 DOI: 10.1039/d0nr03332d] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A new technique for generating bulk nanobubble suspensions has been developed based on Henry's law which states that the amount of dissolved gas in a liquid is proportional to its partial pressure above the liquid. This principle which forms the basis of vacuum degasification has been exploited here to produce stable bulk nanobubbles in excess of 109 bubble mL-1 in pure water, through successive expansion/compression strokes inside a sealed syringe. We provide evidence that the observed nano-entities must be gas-filled nanobubbles by showing that: (i) they cannot be attributed to organic or inorganic impurities; (ii) they disappear gradually over time whilst their mean size remains unchanged; (iii) their number density depends on the concentration of dissolved gas in water and its solubility; and (iv) added sparging of gas enhances process yield. We study the properties of these nanobubbles including the effects of type of dissolved gas, water pH and the presence of different valence salts on their number density and stability. Given the potential of the technique for large scale production of nanobubble suspensions, we describe a successfully tested automated model and outline the basis for process scale-up.
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Affiliation(s)
- Gianluca Ferraro
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK.
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Guo Z, Hu B, Han H, Lei Z, Shimizu K, Zhang L, Zhang Z. Metagenomic insights into the effects of nanobubble water on the composition of gut microbiota in mice. Food Funct 2020; 11:7175-7182. [PMID: 32756645 DOI: 10.1039/d0fo01592j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The particular physicochemical and biological properties of nanobubbles (NBs) have prompted many researchers to conduct an in-depth study on their potential application in various fields. This study aims to investigate the effects of nanobubble water (NBW) on the community structure of the gut microbiota in mice. In this study, supplementation with nitrogen NBW (SD-N2 group), hydrogen NBW (SD-H2 group) and deionized water (SD-C group) to a standard diet of mice was performed for five weeks. The composition of fecal microbiota was analyzed by using 16S rRNA gene sequencing. Compared with the SD-C group, the species diversity of the fecal microbiota in mice in NBW groups was significantly increased. At the genus level, supplementation with nitrogen NBW to mice significantly increased the relative abundance of two beneficial genera Clostridium and Coprococcus (mean growth 6.3 times and 9.7 times, respectively), while supplementation with hydrogen NBW significantly decreased the relative abundance of two pathogenic genera Mucispirillum and Helicobacter (mean reduction rate 86% and 60%, respectively). These results demonstrate that supplementation with NBW might optimize the composition of gut microbiota in mice.
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Affiliation(s)
- Zitao Guo
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi 214122, China.
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Formation and Stability of Carbon Dioxide Nanobubbles for Potential Applications in Food Processing. FOOD ENGINEERING REVIEWS 2020. [DOI: 10.1007/s12393-020-09233-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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