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Li X, Wang Y, Liu C, Wei H, Xu J, Lu C, Kou J, Sun LB. Enhanced Hydrogen Production via Photothermal-Coupled Ultrasound Pyrolysis of Waste Bio-Oil. Chem Asian J 2024:e202400764. [PMID: 39136385 DOI: 10.1002/asia.202400764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2024] [Revised: 07/30/2024] [Indexed: 09/25/2024]
Abstract
The creation of hydrogen using the lower-cost feedstock, waste organics (WOs), e. g. kitchen waste bio-oil, is a win-win solution, because it can both solve energy problems and reduce environmental pollution. Ultrasound has received considerable interest in organic decomposition; however, the application of ultrasound alone is not a good choice for the hydrogen production from WOs, because of the energy consumption and efficiency. To boost the hydrogen production based on ultrasonic cavitation cracking of bio-oil, photothermal materials are introduced into the hydrogen production system to form localized hot spots. Materials carbon black (CB), carbon nanotubes (CNT), and silicon dioxide (SiO2) all exhibit significant enhancing effects on the hydrogen production from bio-oil, and the CB exhibits the most significant strengthening effect among these materials. When the dosage of CB is 5 mg, hydrogen production rate is 180.1 μmol h-1, representing a notable 1.7-fold increase compared to the production rate without CB. In the presence of light and ultrasound, the hydrogen production rate can be increased by 66.7-fold compared to the situation where only light is present without ultrasound.
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Affiliation(s)
- Xiaoxiao Li
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, 210009, P. R. China
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China
| | - Yuebing Wang
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, 210009, P. R. China
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China
| | - Chunxue Liu
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, 210009, P. R. China
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China
| | - Huimin Wei
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, 210009, P. R. China
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China
| | - Jinshan Xu
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, 210009, P. R. China
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China
| | - Chunhua Lu
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, 210009, P. R. China
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China
| | - Jiahui Kou
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, 210009, P. R. China
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China
| | - Lin-Bing Sun
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China
- College of Chemical Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China
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2
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Xiao J, Guo S, Wang D, An Q. Fenton-Like Reaction: Recent Advances and New Trends. Chemistry 2024; 30:e202304337. [PMID: 38373023 DOI: 10.1002/chem.202304337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 02/15/2024] [Accepted: 02/16/2024] [Indexed: 02/20/2024]
Abstract
The Fenton reaction refers to the reaction in which ferrous ions (Fe2+) produce hydroxyl radicals and other reactive oxidizing substances by decomposing hydrogen peroxide (H2O2). This paper reviews the mechanism, application system, and materials employed in the Fenton reaction including conventional homogeneous and non-homogeneous Fenton reactions as well as photo-, electrically-, ultrasonically-, and piezoelectrically-triggered Fenton reactions, and summarizes the applications in the degradation of soil oil pollutions, landfill leachate, textile wastewater, and antibiotics from a practical point of view. The mineralization paths of typical pollutant are elucidated with relevant case studies. The paper concludes with a summary and outlook of the further development of Fenton-like reactions.
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Affiliation(s)
- Jiaying Xiao
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing), 100083, China
| | - Sufang Guo
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing), 100083, China
| | - Dong Wang
- SINOPEC (Beijing) Research Institute of Chemical Industry Co., Ltd
| | - Qi An
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing), 100083, China
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3
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Kalidass J, Sivasankar T. Mesoporous core/shell MnFe2O4 nanocomposite derived from facile sonoelectrochemical process: An eco-friendly method for rapid synthesis and versatile industrial applications. J Taiwan Inst Chem Eng 2023. [DOI: 10.1016/j.jtice.2023.104766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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4
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Mieles-Gómez L, Quintana SE, García-Zapateiro LA. Ultrasound-Assisted Extraction of Mango ( Mangifera indica) Kernel Starch: Chemical, Techno-Functional, and Pasting Properties. Gels 2023; 9:gels9020136. [PMID: 36826306 PMCID: PMC9956994 DOI: 10.3390/gels9020136] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 01/31/2023] [Accepted: 02/02/2023] [Indexed: 02/09/2023] Open
Abstract
(1) Background: Starch is the main component of mango (Mangifera indica) kernel, making it an alternative to obtain an ingredient from a non-conventional source with potential application in food and other industrial applications; however, reports on the use of new extraction techniques for this material are scarce. The main objective of this research was to evaluate the effect of ultrasound-assisted extraction (UAE) on the yield, chemical, techno-functional, rheological, and pasting properties of starch isolated from a non-conventional source such as a mango kernel. (2) Methods: Different power sonication conditions (120, 300, and 480 W) and sonication time (10, 20, and 30 min) were evaluated along with a control treatment (extracted by the wet milling method). (3) Results: Ultrasound-assisted extraction increases starch yield, with the highest values (54%) at 480 W and 20 min. A significant increase in the amylose content, water-holding capacity, oil-holding capacity, solubility, and swelling power of ultrasonically extracted starches was observed. Similarly, mango kernel starch (MKS) exhibited interesting antioxidant properties. The sol-gel transition temperature and pasting parameters, such as the breakdown viscosity (BD) and the setback viscosity (SB), decreased with ultrasound application; (4) Conclusion: indicating that ultrasound caused changes in physical, chemical, techno-functional, rheological, and pasting properties, depending on the power and time of sonication, so it can be used as an alternative starch extraction and modification technique, for example, for potential application in thermally processed food products such as baked goods, canned foods, and frozen foods.
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Raspe DT, da Silva C, Cláudio da Costa S. Compounds from Stevia rebaudiana Bertoni leaves: An overview of non-conventional extraction methods and challenges. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.101593] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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6
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Li S, Zhao S, Pei J, Wang H, Meng H, Vrouwenvelder JS, Li Z. Stimuli-Responsive Lysozyme Nanocapsule Engineered Microfiltration Membranes with a Dual-Function of Anti-Adhesion and Antibacteria for Biofouling Mitigation. ACS APPLIED MATERIALS & INTERFACES 2021; 13:32205-32216. [PMID: 34225456 DOI: 10.1021/acsami.1c07445] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Biofouling remains as a persistent problem impeding the applications of membranes for water and wastewater treatment. Green anti-biofouling of membranes made of natural and environmentally friendly materials and methods is a promising strategy to tackle this problem. Herein, we have developed a functionalized PVDF membrane with stimuli-responsive lysozyme nanocapsules (NCP). These nanocapsules can responsively release lysozyme according to environmental stimuli (pH and redox) induced by bacteria. Results showed that (i) the surface of the functionalized membrane with NCP had enhanced hydrophilicity, reduced roughness, and negative charge, (ii) a remarkable reduction of adsorption of proteins, polysaccharides, and bacteria was achieved by the functionalized membrane, and (iii) the colony forming unit (CFU) of bacteria on a membrane surface was reduced more than 80% within 24 h of contact. In addition, the NCP membrane showed excellent anti-biofouling activity regarding the bacterial viability being 12.5 and 8.3% on the membrane after filtration with 108 CFU mL-1 Escherichia coli and Staphylococcus aureus solution as feed, respectively. The coating layer and assembled nanocapsules endowed the membrane with improved lysozyme stability, anti-adhesion performance, and antibacterial activity. Stimuli-responsive lysozyme nanocapsule engineered microfiltration membranes show great potential for anti-biofouling in future practical application.
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Affiliation(s)
- Sihang Li
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Shuzhen Zhao
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jianfei Pei
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Haihua Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Huanna Meng
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Johannes S Vrouwenvelder
- Water Desalination and Reuse Center, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Zhenyu Li
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
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Zhang X, Zhu X, Cao Y, Zhang K, Huang Y, Yang F, Ren X. Analysis of the Influencing Factors of the Hydroxyl Radical Yield in a Hydrodynamic Cavitation Bubble of a Chitosan Solution Based on a Numerical Simulation. ACS OMEGA 2021; 6:3736-3744. [PMID: 33644528 PMCID: PMC7906497 DOI: 10.1021/acsomega.0c05335] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 01/14/2021] [Indexed: 06/12/2023]
Abstract
In this paper, the hydroxyl radical yield of a cavitation bubble and its influencing factors in the process of chitosan degradation with hydrodynamic cavitation in a single-hole orifice plate was investigated by a numerical simulation method. The hydroxyl radical yield of the cavitation bubble was calculated and analyzed by the Gilmore equation as the dynamic equation combined with the mass transfer equation, heat transfer equation, energy balance equation, and the principle of Gibbs free energy minimization. The influence of geometric parameters of the orifice plate and operating parameters on the formation of hydroxyl radicals was investigated. The results showed that the hydroxyl radicals produced at the moment of cavitation bubble collapse increased with the increase of the initial radius (R 0), upstream inlet pressure (P 1), downstream recovery pressure (P 2), downstream pipe diameter (d p), and the ratio of the orifice diameter to the pipe diameter (β). The simulation results provide a certain basis for the regulation of hydrodynamic cavitation degradation of chitosan.
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Affiliation(s)
- Xiangyu Zhang
- Guangxi
Key Laboratory of Green Processing of Sugar Resources, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, P. R. China
- School
of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, P. R. China
| | - Xinfeng Zhu
- Guangxi
Key Laboratory of Green Processing of Sugar Resources, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, P. R. China
- School
of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, P. R. China
| | - Yan Cao
- Guangxi
Key Laboratory of Green Processing of Sugar Resources, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, P. R. China
- School
of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, P. R. China
| | - Kunming Zhang
- Guangxi
Key Laboratory of Green Processing of Sugar Resources, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, P. R. China
- School
of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, P. R. China
| | - Yongchun Huang
- Guangxi
Key Laboratory of Green Processing of Sugar Resources, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, P. R. China
- School
of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, P. R. China
| | - Feng Yang
- Guangxi
Key Laboratory of Green Processing of Sugar Resources, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, P. R. China
- School
of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, P. R. China
| | - Xian’e Ren
- Guangxi
Key Laboratory of Green Processing of Sugar Resources, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, P. R. China
- School
of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, P. R. China
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Patil PB, Bhandari VM, Ranade VV. Improving efficiency for removal of ammoniacal nitrogen from wastewaters using hydrodynamic cavitation. ULTRASONICS SONOCHEMISTRY 2021; 70:105306. [PMID: 32795930 PMCID: PMC7786615 DOI: 10.1016/j.ultsonch.2020.105306] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Revised: 07/24/2020] [Accepted: 08/06/2020] [Indexed: 05/24/2023]
Abstract
The present study reports significant improvements in the removal of ammoniacal nitrogen from wastewater which is an important problem for many industries such as dyes and pigment, distilleries and fisheries. Pilot plant studies (capacity, 1 m3/h) on synthetic wastewater using 4-amino phenol as model nitrogen containing organic compound and two real industrial effluents of high ammoniacal nitrogen content were carried out using hydrodynamic cavitation. Two reactor geometries were evaluated for increased efficiency in removal-orifice and vortex diode. Effect of initial concentration (100-500 mg/L), effect of pressure drop (0.5-5 bar) and nature of cavitating device (linear and vortex flow for cavitation) were evaluated along with effect of salt content, effect of hydrogen peroxide addition and aeration. Initial concentration was found to have significant impact on the extent of removal: ~ 5 g/m3 removal for initial concentration of 100 mg/L and up to 12 g/m3 removal at high concentration of 500 mg/L. Interestingly, significant improvement of the order of magnitude (up to 8 times) in removal of ammoniacal nitrogen could be obtained by sparging air or oxygen in hydrodynamic cavitation and a very high removal of above 80% could be achieved. The removal of ammoniacal nitrogen by vortex diode was also found to be effective in the industrial wastewaters and results on two different effluent samples of distillery industry indicated up to 75% removal, though with longer time of treatment compared to that of synthetic wastewater. The developed methodology of hydrodynamic cavitation technology with aeration and vortex diode as a cavitating device was found to be highly effective for improving the efficiency of the conventional cavitation methods and hence can be highly useful in industrial wastewater treatment, specifically for the removal of ammoniacal nitrogen.
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Affiliation(s)
- Pravin B Patil
- Chemical Engineering & Process Development Division, CSIR-National Chemical Laboratory, Pune 411 008, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-National Chemical Laboratory, Pune 411 008, India
| | - Vinay M Bhandari
- Chemical Engineering & Process Development Division, CSIR-National Chemical Laboratory, Pune 411 008, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-National Chemical Laboratory, Pune 411 008, India.
| | - Vivek V Ranade
- Chemical Engineering & Process Development Division, CSIR-National Chemical Laboratory, Pune 411 008, India
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Batghare AH, Roy K, Moholkar VS. Investigations in physical mechanism of ultrasound-assisted antisolvent batch crystallization of lactose monohydrate from aqueous solutions. ULTRASONICS SONOCHEMISTRY 2020; 67:105127. [PMID: 32334378 DOI: 10.1016/j.ultsonch.2020.105127] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 03/21/2020] [Accepted: 04/07/2020] [Indexed: 05/28/2023]
Abstract
Sonication is known to enhance crystallization of lactose from aqueous solutions. This study has attempted to reveal the mechanistic features of antisolvent crystallization of lactose monohydrate from aqueous solutions. Experiments were conducted in three protocols, viz. mechanical stirring, mechanical stirring with sonication and sonication at elevated static pressure. Mechanical stirring provided macroconvection while sonication induced microconvection in the system. Other experimental parameters were initial lactose concentration and rate of antisolvent (ethanol) addition. Kinetic parameters of crystallization were coupled with simulations of bubble dynamics. The growth rate of crystals, rate of nucleation, average size of crystal crop and total lactose yield in different protocols were related to nature of convection in the medium. Macroconvection assisted nucleation but could not give high growth rate. Microconvection comprised of microstreaming due to ultrasound and acoustic (or shock) waves due to transient cavitation. Sonication at atmospheric static pressure enhanced growth rate but reduced nucleation. However, with elimination of cavitation at elevated static pressure, sonication enhanced both nucleation and growth rate resulting in almost complete lactose recovery.
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Affiliation(s)
- Amit H Batghare
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Kuldeep Roy
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Vijayanand S Moholkar
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India.
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10
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Cui R, Zhu F. Effect of ultrasound on structural and physicochemical properties of sweetpotato and wheat flours. ULTRASONICS SONOCHEMISTRY 2020; 66:105118. [PMID: 32272332 DOI: 10.1016/j.ultsonch.2020.105118] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 03/12/2020] [Accepted: 03/30/2020] [Indexed: 06/11/2023]
Abstract
Ultrasound technologies are increasingly used for modification of physicochemical properties of food systems. Effects of ultrasound (20 kHz, 750 W) up to 20 h on physicochemical properties of two varieties of sweetpotato flour were studied and compared with those of commercial wheat flour. Ultrasound induced structural modifications on starch granules mainly in the morphological changes of granules and reduction of the crystallinity. Longer treatment significantly decreased enthalpy change of gelatinization, pasting viscosities, gelling capacity, while increasing in vitro starch digestibility of raw flour. Besides, prolonged treatment reduced total phenolic contents and in vitro antioxidant activities of sweetpotato flours, mainly due to pyrolysis and release of hydroxyl radicals caused by cavitation. The extents of these changes were seen to depend on the treatment time and indicated degradation and modifications of the chemical components (e.g., starch and polyphenol) of flours. This study suggests that ultrasound processing as a non-thermal and energy-saving technique has potential to modify flour functionalities.
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Affiliation(s)
- Rongbin Cui
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Fan Zhu
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
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Mechanistic study of sulfadiazine degradation by ultrasound-assisted Fenton-persulfate system using yolk-shell Fe3O4@hollow@mSiO2 nanoparticles. Chem Eng Sci 2020. [DOI: 10.1016/j.ces.2020.115522] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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12
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Zhou YN, Li JJ, Wu YY, Luo ZH. Role of External Field in Polymerization: Mechanism and Kinetics. Chem Rev 2020; 120:2950-3048. [PMID: 32083844 DOI: 10.1021/acs.chemrev.9b00744] [Citation(s) in RCA: 99] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The past decades have witnessed an increasing interest in developing advanced polymerization techniques subjected to external fields. Various physical modulations, such as temperature, light, electricity, magnetic field, ultrasound, and microwave irradiation, are noninvasive means, having superb but distinct abilities to regulate polymerizations in terms of process intensification and spatial and temporal controls. Gas as an emerging regulator plays a distinctive role in controlling polymerization and resembles a physical regulator in some cases. This review provides a systematic overview of seven types of external-field-regulated polymerizations, ranging from chain-growth to step-growth polymerization. A detailed account of the relevant mechanism and kinetics is provided to better understand the role of each external field in polymerization. In addition, given the crucial role of modeling and simulation in mechanisms and kinetics investigation, an overview of model construction and typical numerical methods used in this field as well as highlights of the interaction between experiment and simulation toward kinetics in the existing systems are given. At the end, limitations and future perspectives for this field are critically discussed. This state-of-the-art research progress not only provides the fundamental principles underlying external-field-regulated polymerizations but also stimulates new development of advanced polymerization methods.
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Affiliation(s)
- Yin-Ning Zhou
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Jin-Jin Li
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Yi-Yang Wu
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Zheng-Hong Luo
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
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13
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Mechanistic investigations in ultrasound-induced intensification of fermentative riboflavin production. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.biteb.2020.100380] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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14
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Zheng ZY, Xie G, Li L, Liu WL. The joint effect of ultrasound and magnetic Fe3O4 nanoparticles on the yield of 2,6-dimethoxy-ρ-benzoquinone from fermented wheat germ: Comparison of evolutionary algorithms and interactive analysis of paired-factors. Food Chem 2020; 302:125275. [DOI: 10.1016/j.foodchem.2019.125275] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 07/15/2019] [Accepted: 07/26/2019] [Indexed: 12/18/2022]
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15
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Rahimi M, Shahhosseini S, Sobati MA, Movahedirad S, Khodaei B, Hassanzadeh H. A novel multi-probe continuous flow ultrasound assisted oxidative desulfurization reactor; experimental investigation and simulation. ULTRASONICS SONOCHEMISTRY 2019; 56:264-273. [PMID: 31101262 DOI: 10.1016/j.ultsonch.2019.04.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 04/08/2019] [Accepted: 04/10/2019] [Indexed: 06/09/2023]
Abstract
In this work, a cylindrical multi-probe continuous flow system with different injection strategies was exploited to study ultrasound assisted oxidative desulfurization process. The effects of nozzle number, nozzle diameter, ultrasonic power and volumetric flow rate (residence time) on the desulfurization efficiency of the diesel fuel were investigated. It was found that the sulfur removal increases by increasing the nozzle diameter when the flow rate is fixed. Sulfur removal was increased by increasing the residence time, for all types of the nozzles. Injection of the aqueous phase below the horn tip in the active zone provides the conditions by which the higher interfacial area between the phases and thus greater conversion rate can be obtained. The results indicated that over 97% sulfur removal was achieved using the double-nozzle injection with nozzle diameter of 1.5 mm, residence time of 15 min, electrical power of 277.2 W and volumetric flow rates of the aqueous and oil phases 48.89 and 244.44 mL/min, respectively. The simulation results showed that choosing a proper injection strategy has an impact on the hydrodynamic and flow pattern induced by ultrasonic field and in turn could effectively influence the mixing of the two-immiscible phases. A more uniform distribution of the aqueous-phase volume fraction was observed in the system with double-nozzle injection in comparison with the single nozzle injection.
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Affiliation(s)
- Masoud Rahimi
- Process Simulation and Control Research Laboratory, School of Chemical Engineering, Iran University of Science and Technology, 16846 Tehran, Iran; School of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16765-163, Tehran, Iran
| | - Shahrokh Shahhosseini
- Process Simulation and Control Research Laboratory, School of Chemical Engineering, Iran University of Science and Technology, 16846 Tehran, Iran; School of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16765-163, Tehran, Iran.
| | - Mohammad Amin Sobati
- Process Simulation and Control Research Laboratory, School of Chemical Engineering, Iran University of Science and Technology, 16846 Tehran, Iran; School of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16765-163, Tehran, Iran
| | - Salman Movahedirad
- Process Simulation and Control Research Laboratory, School of Chemical Engineering, Iran University of Science and Technology, 16846 Tehran, Iran; School of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16765-163, Tehran, Iran
| | - Behrang Khodaei
- Process Simulation and Control Research Laboratory, School of Chemical Engineering, Iran University of Science and Technology, 16846 Tehran, Iran; School of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16765-163, Tehran, Iran
| | - Hossein Hassanzadeh
- Process Simulation and Control Research Laboratory, School of Chemical Engineering, Iran University of Science and Technology, 16846 Tehran, Iran; School of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16765-163, Tehran, Iran
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16
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Bian C, Zhou Y, Luo Z. Mechanistic and kinetic investigation of Cu(II)‐catalyzed controlled radical polymerization enabled by ultrasound irradiation. AIChE J 2019. [DOI: 10.1002/aic.16746] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Chao Bian
- Department of Chemical Engineering School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University Shanghai People's Republic of China
| | - Yin‐Ning Zhou
- Department of Chemical Engineering School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University Shanghai People's Republic of China
| | - Zheng‐Hong Luo
- Department of Chemical Engineering School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University Shanghai People's Republic of China
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17
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Xu S, Bi H, Liu G, Su B. Integration of catalytic ozonation and adsorption processes for increased efficiency of textile wastewater treatment. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2019; 91:650-660. [PMID: 30859663 DOI: 10.1002/wer.1102] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 03/04/2019] [Accepted: 03/05/2019] [Indexed: 06/09/2023]
Abstract
Advanced and optimized textile wastewater treatment by catalytic ozonation and activated carbon (AC) adsorption was investigated. Scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy indicated that Mn and Ce oxides were successfully loaded on the γ-Al2 O3 support, and MnO2 , Mn2 O3 , CeO2 , and Ce2 O3 were the main components of the catalyst. Actual textile wastewater from biochemical effluent was used as experiment wastewater. The removal efficiencies of chemical oxygen demand (COD) and chromaticity were approximately 30.6% (414-287 mg/L on average) and 99.3% (4,033 times to 27 times on average), respectively during the 30-day on-site continuous-flow test with an ozone dosage, contact time, and gas-liquid ratio of 100 mg/L, 15.7 min, and 2.9, respectively. Following 1 g/L AC adsorption, the effluent COD concentration was reduced to 40 mg/L. By contrast, AC adsorption without catalytic ozonation as pretreatment required 10 g/L AC dosage to achieve similar treatment results. Gas chromatography-mass spectrometry analyses indicated that volatile phenols, sulfides, and aniline in wastewater were completely removed after treatment. Inductively coupled plasma results further showed that the active components of MnOx -CeOx in the catalyst were stable after continuous use for 60 days. PRACTITIONER POINTS: Mesoporous catalyst synthesized by impregnating MnOx -CeOx on γ-Al2 O3 support. Catalytic ozonation and AC adsorption were combined to degrade organics. Maximum degradation of COD and chromaticity by optimizing process variables. The efficiency of the method was compared to that of single AC adsorption.
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Affiliation(s)
- Shengkai Xu
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, China
| | - Huaqi Bi
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, China
| | - Guangqing Liu
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, China
| | - Bensheng Su
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, China
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18
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Truong T, Palmer M, Bansal N, Bhandari B. Effect of dissolved carbon dioxide on the sonocrystallisation and physical properties of anhydrous milk fat. Int Dairy J 2019. [DOI: 10.1016/j.idairyj.2019.02.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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19
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Li X, Mettu S, Martin GJO, Ashokkumar M, Lin CSK. Ultrasonic pretreatment of food waste to accelerate enzymatic hydrolysis for glucose production. ULTRASONICS SONOCHEMISTRY 2019; 53:77-82. [PMID: 30642800 DOI: 10.1016/j.ultsonch.2018.12.035] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 11/24/2018] [Accepted: 12/24/2018] [Indexed: 06/09/2023]
Abstract
Recovering valuable materials from food waste by applying the concept of a bio-refinery is attracting considerable interest. To this effect, we investigated the possibility of enhancing the enzymatic hydrolysis of food waste using ultrasonic technology. The effect of pre-treating blended food waste with high-intensity ultrasound (20 kHz) on subsequent hydrolysis by glucoamylase was investigated as a function of sonication time and temperature. Particle sizing by laser diffraction, and imaging via scanning electronic microscopy showed that ultrasonic pre-treatment could reduce the particle size of the blended food waste significantly, resulting in a better interaction with the enzyme. As a consequence, the glucose yield of enzymatic hydrolysis was ∼10% higher for food waste pre-sonicated using the most intensive ultrasonication conditions studied (5 min sonication at a power of 0.8 W/mL at 20 °C) than for the untreated control. In addition, the time required to achieve high yields of glucose could be more than halved using ultrasonic pre-treatment. This could enable the hydrolysis reactor size or the enzyme usage to be reduced by more than 50%. Therefore, an ultrasound-assisted bioconversion process from food waste into a value-added product has been demonstrated.
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Affiliation(s)
- Xiaotong Li
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
| | - Srinivas Mettu
- School of Chemistry, The University of Melbourne, VIC 3010, Australia; Algal Processing Group, Department of Chemical Engineering, The University of Melbourne, VIC 3010, Australia
| | - Gregory J O Martin
- Algal Processing Group, Department of Chemical Engineering, The University of Melbourne, VIC 3010, Australia
| | | | - Carol Sze Ki Lin
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong.
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20
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Rahimi M, Shahhosseini S, Movahedirad S. Hydrodynamic and mass transfer investigation of oxidative desulfurization of a model fuel using an ultrasound horn reactor. ULTRASONICS SONOCHEMISTRY 2019; 52:77-87. [PMID: 30477791 DOI: 10.1016/j.ultsonch.2018.11.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 10/18/2018] [Accepted: 11/06/2018] [Indexed: 05/27/2023]
Abstract
Ultrasound assisted oxidative desulfurization (UAOD) is a promising technology, which can result in ultra-low sulfur fuels in order to reduce the environmental crisis. Most of the researches have been conducted with the experimental approaches. In the present study, a computational fluid dynamic (CFD) model has been developed to investigate the hydrodynamics as well as the reactions involved in a sonoreactor. The results indicate that the physical and chemical effects associated with the ultrasonic field can contribute to the enhancement of the reaction and sulfur removal rates. However, the physical effects are predominant as compared to the chemical effects. Indeed, homogenous mixing and fine micro-emulsification caused by the physical effects lead to increase the interfacial area and mass transfer rate between the immiscible aqueous and oil phases. The dibenzothiophene concentration predicted by the simulation was in a reasonably good agreement with the corresponding experimental data. Another key hydrodynamic parameter induced by ultrasonic field was turbulent kinetic energy, which can play an important role in the sulfur removal rate. The results indicate the higher desulfurization efficiency has been attained at the regions with the higher velocity fluctuations.
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Affiliation(s)
- Masoud Rahimi
- School of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16765-163, Tehran, Iran
| | - Shahrokh Shahhosseini
- School of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16765-163, Tehran, Iran.
| | - Salman Movahedirad
- School of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16765-163, Tehran, Iran
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21
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Borah AJ, Agarwal M, Goyal A, Moholkar VS. Physical insights of ultrasound-assisted ethanol production from composite feedstock of invasive weeds. ULTRASONICS SONOCHEMISTRY 2019; 51:378-385. [PMID: 30097257 DOI: 10.1016/j.ultsonch.2018.07.046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 07/29/2018] [Accepted: 07/31/2018] [Indexed: 06/08/2023]
Abstract
Invasive weeds ubiquitously found in terrestrial and aquatic ecosystems form potential feedstock for lignocellulosic ethanol production. The present study has reported a bioprocess for production of ethanol using mixed feedstock of 8 invasive weeds found in India. The feedstock was subjected to pretreatment comprising dilute acid hydrolysis (for hydrolysis of hemicellulosic fraction), alkaline delignification and enzymatic hydrolysis of cellulosic fraction. Pentose-rich and hexose-rich hydrolyzates obtained from pretreatment were fermented separately using microbial cultures of S. cerevisiae and C. shehatae. Fermentation mixture was sonicated at 35 kHz at 10% duty cycle. The time profiles of total reducing sugars, ethanol and biomass was fitted to a kinetic model using Genetic Algorithm. Sonication boosted the kinetics of fermentation 2-fold. The net bioethanol yield of the process was ∼220 g/kg raw biomass (with contributions of 86.8 and 133 g/kg raw biomass from pentose and hexose fermentations, respectively). Comparative evaluation of parameters of kinetic model under control and test conditions revealed several beneficial influences of sonication on both pentose and hexose fermentation systems such as faster transport of nutrients, substrate and products across cell membrane, rise in Monod saturation constant for substrate with concurrent reduction in substrate inhibition, and reduction of energy requirements for cell maintenance. Flow cytometry analysis of native and ultrasound-treated cells revealed no adverse influence of sonication on cell viability.
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Affiliation(s)
- Arup Jyoti Borah
- Center for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Mayank Agarwal
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Arun Goyal
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Vijayanand S Moholkar
- Center for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India; Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India.
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22
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Batghare AH, Pati S, Roy K, Moholkar VS. Mechanistic investigations in ultrasound-assisted extraction of astaxanthin from Phaffia rhodozyma MTCC 7536. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.biteb.2018.10.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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23
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Kerabchi N, Merouani S, Hamdaoui O. Liquid depth effect on the acoustic generation of hydroxyl radical for large scale sonochemical reactors. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2018.05.039] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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24
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Dikshit PK, Kharmawlong GJ, Moholkar VS. Investigations in sonication-induced intensification of crude glycerol fermentation to dihydroxyacetone by free and immobilized Gluconobacter oxydans. BIORESOURCE TECHNOLOGY 2018; 256:302-311. [PMID: 29455098 DOI: 10.1016/j.biortech.2018.02.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Revised: 02/02/2018] [Accepted: 02/05/2018] [Indexed: 06/08/2023]
Abstract
This study reports crude glycerol fermentation by G. oxydans for dihydroxyacetone (DHA) production, and intensification of fermentation with sonication. Fermentation was carried out using both free and immobilized cells (on polyurethane foam support) for initial glycerol concentrations of 20, 30 and 50 g/L. Sonication at 20% duty cycle enhanced glycerol consumption by 60-84% with no significant change in cell morphology. Lesser DHA yield in crude glycerol fermentation was attributed to possible formation of inhibitory products. Slight reduction in DHA yield for initial glycerol concentration of 50 g/L was attributed to substrate inhibition. Higher DHA productivity was obtained for immobilized cells. Circular dichroism analysis of intracellular proteins obtained from ultrasound-treated G. oxydans revealed significant reduction in α-helix and β-sheet content. These conformational changes in protein structure could augment activity of intracellular glycerol dehydrogenase, which is manifested in terms of enhanced metabolism of glycerol by G. oxydans.
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Affiliation(s)
- Pritam Kumar Dikshit
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Gracel Joe Kharmawlong
- Department of Chemical Engineering, National Institute of Technology (NIT), Tiruchirapalli 620 015, Tamil Nadu, India
| | - Vijayanand S Moholkar
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India.
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25
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Poddar MK, Arjmand M, Sundararaj U, Moholkar VS. Ultrasound-assisted synthesis and characterization of magnetite nanoparticles and poly(methyl methacrylate)/magnetite nanocomposites. ULTRASONICS SONOCHEMISTRY 2018; 43:38-51. [PMID: 29555287 DOI: 10.1016/j.ultsonch.2017.12.035] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 12/17/2017] [Accepted: 12/17/2017] [Indexed: 06/08/2023]
Abstract
Poly(methyl methacrylate)/magnetite (PMMA/Fe3O4) nanocomposites were prepared with a two-step technique involving sonication. Fe3O4 nanoparticles were synthesized by ultrasound-assisted co-precipitation, and then PMMA/Fe3O4 (1-5 wt%) nanocomposites were synthesized via ultrasound-assisted in-situ emulsion polymerization. Best physical properties of the nanocomposites for different Fe3O4 loadings were: tensile strength (2 wt%) = 40.28 MPa, Young's modulus (2 wt%) = 2.4 GPa, percentage elongation (2 wt%) = 2.24%, glass transition temperature (2 wt%) = 122.5 °C, thermal inflection point (2 wt%) = 383 °C, electrical conductivity (5 wt%) = 2.0 × 10-13 S/cm, coercivity = 59.85 Oe (2 wt%), magnetic saturation (5 wt%) = 5.12 emu/g, magnetic remanence (5 wt%) = 0.56 emu/g, and electromagnetic interference shielding effectiveness (5 wt%) = 1.45 dB. This unique combination of physical properties at relatively low Fe3O4 loading is attributed to ultrasound-mediated uniform dispersion of the nanofiller in the polymer matrix.
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Affiliation(s)
- Maneesh Kumar Poddar
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Mohammad Arjmand
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr NW Calgary, Alberta T2N 1N4, Canada
| | - Uttandaraman Sundararaj
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr NW Calgary, Alberta T2N 1N4, Canada
| | - Vijayanand S Moholkar
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India.
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26
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Harifi T, Montazer M. Application of sonochemical technique for sustainable surface modification of polyester fibers resulting in durable nano-sonofinishing. ULTRASONICS SONOCHEMISTRY 2017; 37:158-168. [PMID: 28427619 DOI: 10.1016/j.ultsonch.2017.01.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Revised: 12/31/2016] [Accepted: 01/05/2017] [Indexed: 06/07/2023]
Abstract
In this study firstly we aimed at introducing the effects of ultrasound and sonochemistry in surface modification of polyester fibers. For this purpose, surface modification of polyester fibers was achieved by ultrasound, and contact angle and water spreading time measurements were used to confirm the treatment efficiency. Hydroxylation of terephthalate was occurred by hydroxyl radicals formed during water sonolysis, forming functional groups on polyester surface, as confirmed by XPS analysis, improving the wettability. Creation of hydroxyl groups under sono surface modification was further assessed by dyeing the samples with reactive dye. Secondly, we investigated the durable nano-sono-finishing of polyester fibers by nano TiO2 particles under ultrasonic bath. Washing durability of the sono-synthesized TiO2 nanoparticles was evaluated confirming the effective role of sonochemical technique in polyester surface modification. Thirdly, the self-cleaning activity of sono-synthesized nano TiO2 treated samples toward degradation of Methylene Blue stain was superior to coating of fabric with commercial nano TiO2 using identical procedure.
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Affiliation(s)
- Tina Harifi
- Department of Textile Engineering, Functional Fibrous Structures & Environmental Enhancement (FFSEE), Amirkabir University of Technology, Tehran, Iran
| | - Majid Montazer
- Department of Textile Engineering, Functional Fibrous Structures & Environmental Enhancement (FFSEE), Amirkabir Nanotechnology Research Institute (ANTRI), Amirkabir University of Technology, Tehran, Iran.
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27
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Pawar SK, Mahulkar AV, Pandit AB, Roy K, Moholkar VS. Sonochemical effect induced by hydrodynamic cavitation: Comparison of venturi/orifice flow geometries. AIChE J 2017. [DOI: 10.1002/aic.15812] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sandip K. Pawar
- Dept. of Chemical Engineering; Institute of Chemical Technology (ICT); Matunga, Mumbai Maharashtra 400 019 India
| | - Amit V. Mahulkar
- Dept. of Chemical Engineering; Institute of Chemical Technology (ICT); Matunga, Mumbai Maharashtra 400 019 India
| | - Aniruddha B. Pandit
- Dept. of Chemical Engineering; Institute of Chemical Technology (ICT); Matunga, Mumbai Maharashtra 400 019 India
| | - Kuldeep Roy
- Dept.of Chemical Engineering; Indian Institute of Technology Guwahati; Guwahati Assam 781 039 India
| | - Vijayanand S. Moholkar
- Dept.of Chemical Engineering; Indian Institute of Technology Guwahati; Guwahati Assam 781 039 India
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28
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Sharma S, Kumar Poddar M, Moholkar VS. Enhancement of thermal and mechanical properties of poly(MMA-co-BA)/Cloisite 30B nanocomposites by ultrasound-assisted in-situ emulsion polymerization. ULTRASONICS SONOCHEMISTRY 2017; 36:212-225. [PMID: 28069204 DOI: 10.1016/j.ultsonch.2016.11.029] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2016] [Revised: 09/16/2016] [Accepted: 11/25/2016] [Indexed: 06/06/2023]
Abstract
This study reports synthesis and characterization of poly(MMA-co-BA)/Cloisite 30B (organo-modified montmorillonite clay) nanocomposites by ultrasound-assisted in-situ emulsion polymerization. Copolymers have been synthesized with MMA:BA monomer ratio of 4:1, and varying clay loading (1-5wt% monomer). The poly(MMA-co-BA)/Cloisite 30B nanocomposites have been characterized for their thermal and mechanical properties. Ultrasonically synthesized nanocomposites have been revealed to possess higher thermal degradation resistance and mechanical strength than the nanocomposites synthesized using conventional techniques. These properties, however, show an optimum (or maxima) with clay loading. The maximum values of thermal and mechanical properties of the nanocomposites with optimum clay loading are as follows. Thermal degradation temperatures: T10%=320°C (4wt%), T50=373°C (4wt%), maximum degradation temperature=384°C (4wt%); glass transition temperature=64.8°C (4wt%); tensile strength=20MPa (2wt%), Young's modulus=1.31GPa (2wt%), Percentage elongation=17.5% (1wt%). Enhanced properties of poly(MMA-co-BA)/Cloisite 30B nanocomposites are attributed to effective exfoliation and dispersion of clay nanoparticles in copolymer matrix due to intense micro-convection induced by ultrasound and cavitation. Clay platelets help in effective heat absorption with maximum surface interaction/adhesion that results in increased thermal resistivity of nanocomposites. Hindered motion of the copolymer chains due to clay platelets results in enhancement of tensile strength and Young's modulus of nanocomposite. Rheological (liquid) study of the nanocomposites reveals that nanocomposites have higher yield stress and infinite shear viscosity than neat copolymer. Nonetheless, nanocomposites still display shear thinning behavior - which is typical of the neat copolymer.
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Affiliation(s)
- Sachin Sharma
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Maneesh Kumar Poddar
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Vijayanand S Moholkar
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
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29
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Juliano P, Augustin MA, Xu XQ, Mawson R, Knoerzer K. Advances in high frequency ultrasound separation of particulates from biomass. ULTRASONICS SONOCHEMISTRY 2017; 35:577-590. [PMID: 27217305 DOI: 10.1016/j.ultsonch.2016.04.032] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 04/03/2016] [Accepted: 04/28/2016] [Indexed: 06/05/2023]
Abstract
In recent years the use of high frequency ultrasound standing waves (megasonics) for droplet or cell separation from biomass has emerged beyond the microfluidics scale into the litre to industrial scale applications. The principle for this separation technology relies on the differential positioning of individual droplets or particles across an ultrasonic standing wave field within the reactor and subsequent biomass material predisposition for separation via rapid droplet agglomeration or coalescence into larger entities. Large scale transducers have been characterised with sonochemiluminescence and hydrophones to enable better reactor designs. High frequency enhanced separation technology has been demonstrated at industrial scale for oil recovery in the palm oil industry and at litre scale to assist olive oil, coconut oil and milk fat separation. Other applications include algal cell dewatering and milk fat globule fractionation. Frequency selection depends on the material properties and structure in the biomass mixture. Higher frequencies (1 and 2MHz) have proven preferable for better separation of materials with smaller sized droplets such as milk fat globules. For palm oil and olive oil, separation has been demonstrated within the 400-600kHz region, which has high radical production, without detectable impact on product quality.
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Affiliation(s)
- Pablo Juliano
- CSIRO Food and Nutrition, 671 Sneydes Rd, Werribee, VIC 3030, Australia.
| | - Mary Ann Augustin
- CSIRO Food and Nutrition, 671 Sneydes Rd, Werribee, VIC 3030, Australia
| | - Xin-Qing Xu
- CSIRO Food and Nutrition, 671 Sneydes Rd, Werribee, VIC 3030, Australia
| | - Raymond Mawson
- CSIRO Food and Nutrition, 671 Sneydes Rd, Werribee, VIC 3030, Australia
| | - Kai Knoerzer
- CSIRO Food and Nutrition, 671 Sneydes Rd, Werribee, VIC 3030, Australia
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30
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Gao Z, Zheng J, Chen L. Ultrasonic accelerates asparagine-glucose non-enzymatic browning reaction without acrylamide formation. ULTRASONICS SONOCHEMISTRY 2017; 34:626-630. [PMID: 27773289 DOI: 10.1016/j.ultsonch.2016.06.041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Revised: 06/29/2016] [Accepted: 06/30/2016] [Indexed: 06/06/2023]
Abstract
Ultrasonic accelerated the asparagine-glucose non-enzymatic browning reaction with significant decrease of glucose and asparagine concentrations, and marked increase of intermediate products (UV-absorbance value at 294nm, Abs294), melanoidins (UV-absorbance value at 420nm, Abs420) and in vitro antioxidant activity (DPPH free radical scavenging activity). As the ultrasonic intensity was 17.83W/cm2, the asparagine-glucose solution's Abs294, Abs420 and antioxidant activity increased from 0 to 1.26, 0.88 and 21.56%, respectively, and the glucose and asparagine concentrations of the asparagine-glucose solution reduced 58.97 and 12.57%, respectively. The high performance liquid chromatography (HPLC)-Diode Array Detector (DAD) analyses showed that no acrylamide was detected after 50-min ultrasonic reaction. This study suggested that ultrasonic at higher intensity was a potential method to accelerate the non-enzymatic browning reaction in the asparagine-glucose solution without acrylamide production.
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Affiliation(s)
- Zhiqiang Gao
- Department of Food and Biology Engineering, Zhangzhou Institute of Technology, Zhangzhou, China.
| | - Junfeng Zheng
- Department of Food and Biology Engineering, Zhangzhou Institute of Technology, Zhangzhou, China
| | - Lian Chen
- Department of Food and Biology Engineering, Zhangzhou Institute of Technology, Zhangzhou, China
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31
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Borah AJ, Agarwal M, Poudyal M, Goyal A, Moholkar VS. Mechanistic investigation in ultrasound induced enhancement of enzymatic hydrolysis of invasive biomass species. BIORESOURCE TECHNOLOGY 2016; 213:342-349. [PMID: 26898160 DOI: 10.1016/j.biortech.2016.02.024] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2016] [Revised: 02/05/2016] [Accepted: 02/06/2016] [Indexed: 06/05/2023]
Abstract
This study has assessed four invasive weeds, viz. Saccharum spontaneum (SS), Mikania micrantha (MM), Lantana camara (LC) and Eichhornia crassipes (EC) for enzymatic hydrolysis prior to bioalcohol fermentation. Enzymatic hydrolysis of pretreated biomasses of weeds has been conducted with mechanical agitation and sonication under constant (non-optimum) conditions. Profiles of total reducible sugar release have been fitted to HCH-1 model of enzymatic hydrolysis using Genetic Algorithm. Trends in parameters of this model reveal physical mechanism of ultrasound-induced enhancement of enzymatic hydrolysis. Sonication accelerates hydrolysis kinetics by ∼10-fold. This effect is contributed by several causes, attributed to intense micro-convection generated during sonication: (1) increase in reaction velocity, (2) increase in enzyme-substrate affinity, (3) reduction in product inhibition, and (4) enhancement of enzyme activity due to conformational changes in its secondary structure. Enhancement effect of sonication is revealed to be independent of conditions of enzymatic hydrolysis - whether optimum or non-optimum.
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Affiliation(s)
- Arup Jyoti Borah
- Center for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Mayank Agarwal
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Manisha Poudyal
- Department of Molecular Biology and Biotechnology, Tezpur University, Napaam, Tezpur 784028, Assam, India
| | - Arun Goyal
- Center for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India; Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Vijayanand S Moholkar
- Center for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India; Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India.
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32
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Poddar MK, Sharma S, Moholkar VS. Sonochemical Synthesis of PMMA/Cloisite 30B Nanocomposites: A Mechanistic Investigation. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/masy.201500009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Maneesh Kumar Poddar
- Department of Chemical Engineering; Indian Institute of Technology Guwahati; Guwahati 781 039 Assam India
| | - Sachin Sharma
- Department of Chemical Engineering; Indian Institute of Technology Guwahati; Guwahati 781 039 Assam India
| | - Vijayanand S. Moholkar
- Department of Chemical Engineering; Indian Institute of Technology Guwahati; Guwahati 781 039 Assam India
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33
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Recrystallization of phenacetin and sulfathiazole using the sonocrystallization process. J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2015.08.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Borah AJ, Singh S, Goyal A, Moholkar VS. An assessment of the potential of invasive weeds as multiple feedstocks for biofuel production. RSC Adv 2016. [DOI: 10.1039/c5ra27787f] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The present study assessed the feasibility of five invasive weeds, namely, Arundo donax, Saccharum spontaneum, Mikania mikrantha, Lantana camara and Eichhornia crasspies, as a feedstock for biofuels production.
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Affiliation(s)
- Arup Jyoti Borah
- Center for Energy
- Indian Institute of Technology Guwahati
- Guwahati-781 039
- India
| | - Shuchi Singh
- Center for Energy
- Indian Institute of Technology Guwahati
- Guwahati-781 039
- India
| | - Arun Goyal
- Center for Energy
- Indian Institute of Technology Guwahati
- Guwahati-781 039
- India
- Department of Biosciences and Bioengineering
| | - Vijayanand S. Moholkar
- Center for Energy
- Indian Institute of Technology Guwahati
- Guwahati-781 039
- India
- Department of Chemical Engineering
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35
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Ranjan A, Singh S, Malani RS, Moholkar VS. Ultrasound-assisted bioalcohol synthesis: review and analysis. RSC Adv 2016. [DOI: 10.1039/c6ra11580b] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The present article highlights the efficacy of ultrasound in the intensification of all the steps of bioalcohol synthesis with a critical analysis of the literature.
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Affiliation(s)
- Amrita Ranjan
- Center for Energy
- Indian Institute of Technology Guwahati
- Guwahati-781 039
- India
- Instituto de Biología Molecular y Celular de Plantas (IBMCP)
| | - Shuchi Singh
- Center for Energy
- Indian Institute of Technology Guwahati
- Guwahati-781 039
- India
| | - Ritesh S. Malani
- Center for Energy
- Indian Institute of Technology Guwahati
- Guwahati-781 039
- India
| | - Vijayanand S. Moholkar
- Center for Energy
- Indian Institute of Technology Guwahati
- Guwahati-781 039
- India
- Department of Chemical Engineering
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36
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Behzadnia A, Montazer M, Rad MM. Simultaneous sonosynthesis and sonofabrication of N-doped ZnO/TiO2 core-shell nanocomposite on wool fabric: Introducing various properties specially nano photo bleaching. ULTRASONICS SONOCHEMISTRY 2015; 27:10-21. [PMID: 26186815 DOI: 10.1016/j.ultsonch.2015.04.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Revised: 03/15/2015] [Accepted: 04/17/2015] [Indexed: 06/04/2023]
Abstract
In this study, N-doped ZnO/TiO2 core-shell nanocomposite was successfully sonosynthesized and sonofabricated on wool fabric through a facile one-step method under ambient pressure and low temperature (75-80°C) as a novel photo-catalyst nanocomposite on textile material. The differences between crystalline phase transformation of conventional and ultrasound synthesized N-ZnO/TiO2 has been compared. The influence of different zinc acetate and titanium isopropoxide precursors in the formation of nanocomposite was studied and optimized through response surface methodology. The photocatalytic activity of the sonofabricated catalyst on the wool fabric surface was evaluated through decomposition of Methylene Blue as a model compound under sunlight irradiation. Also, N-doped ZnO/TiO2 nanocomposite sonosynthesized on wool fabric led to photo bleaching of wool fabric due to decomposition of the naturally occurred pigments under daylight irradiation. Further, yellowness index, antibacterial and antifungal activity against Escherichia coli, Staphylococcus aureus and Candida albicans, cell viability, char residual, alkali solubility, mechanical properties and water drop absorption time on the treated wool fabrics were evaluated. Also, the acid solubility of the synthesized nanopowder obtained from sonobath after treatment was characterized in acetic acid indicating higher acid resistance on N-doped ZnO/TiO2 nanocomposite.
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Affiliation(s)
- Amir Behzadnia
- Department of Textile Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Majid Montazer
- Department of Textile Engineering, Functional Fibrous Structures & Environmental Enhancement (FFSEE), Amirkabir University, Tehran, Iran.
| | - Mahnaz Mahmoudi Rad
- Skin Research Centre, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Behzadnia A, Montazer M, Rad MM. In situ photo sonosynthesis and characterize nonmetal/metal dual doped honeycomb-like ZnO nanocomposites on wool fabric. ULTRASONICS SONOCHEMISTRY 2015; 27:200-209. [PMID: 26186838 DOI: 10.1016/j.ultsonch.2015.05.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 05/18/2015] [Accepted: 05/19/2015] [Indexed: 06/04/2023]
Abstract
In this work, nonmetal/metal dual-doped honeycomb-like N-Ag/ZnO nanocomposites were successfully photo sonosynthesized and sonoimmobilized on wool fabric through a facile one-step method under ambient pressure at low temperature as a novel photo-catalyst nanocomposite on textile material. Introducing nitrogen and silver on the sonoprepared nano ZnO particles led to superior photocatalytic activity. The homogenous distribution of the honeycomb-like nanocomposites on the fiber surface was confirmed by FE-SEM, EDX and X-ray mapping. X-ray diffraction patterns also proved the presence of silver metal with a crystal size of 54Å on the photo sonotreated sample with nonmetal/metal dual-doped honeycomb-like N-Ag/ZnO nanocomposites. The defect analysis based on XPS confirmed the composition of the nanocomposite. Ultraviolet-blocking was examined through reflectance spectra in the range of 200-800 nm showing reasonable transmittance property. The sonoloaded wool sample indicated excellent antibacterial/antifungal properties with low negative effect on human dermal fibroblasts. The role of both zinc acetate and silver nitrate concentration on diverse properties of the fabric was investigated and the optimized conditions introduced using response surface methodology. Finally a superior quality wool fabric with multifunctional properties was introduced for using special clothing in different environment.
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Affiliation(s)
- Amir Behzadnia
- Department of Textile Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Majid Montazer
- Department of Textile Engineering, Functional Fibrous Structures & Environmental Enhancement (FFSEE), Amirkabir University, Tehran, Iran.
| | - Mahnaz Mahmoudi Rad
- Skin Research Centre, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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38
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Bhasarkar J, Borah AJ, Goswami P, Moholkar VS. Mechanistic analysis of ultrasound assisted enzymatic desulfurization of liquid fuels using horseradish peroxidase. BIORESOURCE TECHNOLOGY 2015; 196:88-98. [PMID: 26231128 DOI: 10.1016/j.biortech.2015.07.063] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 07/17/2015] [Accepted: 07/18/2015] [Indexed: 06/04/2023]
Abstract
This study has attempted to gain physical insight into ultrasound-assisted enzymatic desulfurization using system comprising horseradish peroxidase enzyme and dibenzothiophene (DBT). Desulfurization pathway (comprising DBT-sulfoxide and DBT-sulfone as intermediates and 4-methoxy benzoic acid as final product) has been established with GC-MS analysis. Intrinsic fluorescence and circular dichroism spectra of ultrasound-treated enzyme reveal conformational changes in secondary structure (reduction in α-helix and β-conformations and increase in random coil content) leading to enhancement in activity. Concurrent analysis of desulfurization profiles, Arrhenius and thermodynamic parameters, and simulations of cavitation bubble dynamics reveal that strong micro-convection generated by sonication enhances enzyme activity and desulfurization kinetics. Parallel oxidation of DBT by radicals generated from transient cavitation gives further boost to desulfurization kinetics. However, random motion of enzyme molecules induced by shock waves reduces frequency factor and limits the ultrasonic enhancement of enzymatic desulfurization.
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Affiliation(s)
- Jaykumar Bhasarkar
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Arup Jyoti Borah
- Center for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Pranab Goswami
- Center for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India; Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Vijayanand S Moholkar
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India; Center for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India.
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39
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Mostafaei M, Ghobadian B, Barzegar M, Banakar A. Optimization of ultrasonic assisted continuous production of biodiesel using response surface methodology. ULTRASONICS SONOCHEMISTRY 2015; 27:54-61. [PMID: 26186820 DOI: 10.1016/j.ultsonch.2015.04.036] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 04/27/2015] [Accepted: 04/28/2015] [Indexed: 06/04/2023]
Abstract
This paper evaluates and optimizes the continuous production of biodiesel from waste cooking oil. In this research work, methanol and potassium hydroxide were used as catalyst engaging response surface methodology. For this purpose, the central composite experimental design (CCED), the effects of various factors such as irradiation distance, probe diameter, ultrasonic amplitude, vibration pulse and material flow into the reactor on reaction yield were studied to optimize the process. The results showed that all of the considered parameters affect the reaction efficiency significantly. The optimum combination of the findings include: irradiation distance which was 75 mm, probe diameter of 28 mm, ultrasonic amplitude of 56%, vibration pulse of 62% and flow rate of 50 ml/min that caused the reaction yield of 91.6% and energy consumption of 102.8 W. To verify this optimized combination, three tests were carried out. The results showed an average efficiency of 91.12% and 102.4 W power consumption which is well matched with the model's predictions.
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Affiliation(s)
- M Mostafaei
- Dept. of Mechanics Engineering of Agricultural Machinery, Tarbiat Modares University, Islamic Republic of Iran
| | - B Ghobadian
- Dept. of Mechanics Engineering of Agricultural Machinery, Tarbiat Modares University, Islamic Republic of Iran.
| | - M Barzegar
- Dept. of Food Science and Technology, Tarbiat Modares University, Islamic Republic of Iran
| | - A Banakar
- Dept. of Mechanics Engineering of Agricultural Machinery, Tarbiat Modares University, Islamic Republic of Iran
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40
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Harifi T, Montazer M. A robust super-paramagnetic TiO2:Fe3O4:Ag nanocomposite with enhanced photo and bio activities on polyester fabric via one step sonosynthesis. ULTRASONICS SONOCHEMISTRY 2015; 27:543-551. [PMID: 25899439 DOI: 10.1016/j.ultsonch.2015.04.008] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Revised: 04/08/2015] [Accepted: 04/08/2015] [Indexed: 06/04/2023]
Abstract
High intensity ultrasound was used for the synthesis and simultaneous deposition of TiO2:Fe3O4:Ag nanocomposites on polyester surface providing a feasible route for imparting magnetic and enhanced antibacterial and self-cleaning activities with controllable hydrophilicity/hydrophobicity at low temperature. Synergistic impact of sonochemistry and physical effects of ultrasound originating from implosive collapse of bubbles were responsible for the formation and adsorption of nanomaterials on the fabric surface during ultrasound irradiation. The increase in photocatalytic activity of TiO2 was obtained attributing to the co-operation of iron oxide and silver nanoparticles nucleated on TiO2 surface boosting the electron-hole pair separation and prolonging their recombination rate. The process was further optimized in terms of reagents concentrations including Fe(2+)/TiO2 and Ag/TiO2 molar ratios using central composite design in order to achieve the best self-cleaning property of the treated fabric. The magnetic measurements indicated the super-paramagnetic behavior of the treated fabric with saturation magnetization of 4.5 (emu/g). Findings suggest the potential of the proposed facial method in producing an intelligent fabric with durable multi-functional activities that can be suitable for various applications including medical, military, bio-separation, bio-sensors, magneto graphic printing, magnetic screens and magnetic filters.
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Affiliation(s)
- Tina Harifi
- Department of Textile Engineering, Amirkabir University of Technology, Functional Fibrous Structures & Environmental Enhancement (FFSEE), Tehran, Iran
| | - Majid Montazer
- Department of Textile Engineering, Amirkabir University of Technology, Functional Fibrous Structures & Environmental Enhancement (FFSEE), Tehran, Iran.
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41
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Actis Grande G, Giansetti M, Pezzin A, Rovero G, Sicardi S. Mapping of cavitational activity in a pilot plant dyeing equipment. ULTRASONICS SONOCHEMISTRY 2015; 27:440-448. [PMID: 26186865 DOI: 10.1016/j.ultsonch.2015.06.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Revised: 05/26/2015] [Accepted: 06/09/2015] [Indexed: 06/04/2023]
Abstract
A large number of papers of the literature quote dyeing intensification based on the application of ultrasound (US) in the dyeing liquor. Mass transfer mechanisms are described and quantified, nevertheless these experimental results in general refer to small laboratory apparatuses with a capacity of a few hundred millilitres and extremely high volumetric energy intensity. With the strategy of overcoming the scale-up inaccuracy consequent to the technological application of ultrasounds, a dyeing pilot-plant prototype of suitable liquor capacity (about 40 L) and properly simulating several liquor to textile hydraulic relationships was designed by including US transducers with different geometries. Optimal dyeing may be obtained by optimising the distance between transducer and textile material, the liquid height being a non-negligible operating parameter. Hence, mapping the cavitation energy in the machinery is expected to provide basic data on the intensity and distribution of the ultrasonic field in the aqueous liquor. A flat ultrasonic transducer (absorbed electrical power of 600 W), equipped with eight devices emitting at 25 kHz, was mounted horizontally at the equipment bottom. Considering industrial scale dyeing, liquor and textile substrate are reciprocally displaced to achieve a uniform colouration. In this technology a non uniform US field could affect the dyeing evenness to a large extent; hence, mapping the cavitation energy distribution in the machinery is expected to provide fundamental data and define optimal operating conditions. Local values of the cavitation intensity were recorded by using a carefully calibrated Ultrasonic Energy Meter, which is able to measure the power per unit surface generated by the cavitation implosion of bubbles. More than 200 measurements were recorded to define the map at each horizontal plane positioned at a different distance from the US transducer; tap water was heated at the same temperature used for dyeing tests (60°C). Different liquid flow rates were tested to investigate the effect of the hydrodynamics characterising the equipment. The mapping of the cavitation intensity in the pilot-plant machinery was performed to achieve with the following goals: (a) to evaluate the influence of turbulence on the cavitation intensity, and (b) to determine the optimal distance from the ultrasound device at which a fabric should be positioned, this parameter being a compromise between the cavitation intensity (higher next to the transducer) and the US field uniformity (achieved at some distance from this device). By carrying out dyeing tests of wool fabrics in the prototype unit, consistent results were confirmed by comparison with the mapping of cavitation intensity.
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Affiliation(s)
- G Actis Grande
- Politecnico di Torino, DISAT - Department of Applied Science and Technology, Corso Duca degli Abruzzi 24, 10129 Torino, Italy.
| | - M Giansetti
- Politecnico di Torino, DISAT - Department of Applied Science and Technology, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
| | - A Pezzin
- Politecnico di Torino, DISAT - Department of Applied Science and Technology, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
| | - G Rovero
- Politecnico di Torino, DISAT - Department of Applied Science and Technology, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
| | - S Sicardi
- Politecnico di Torino, DISAT - Department of Applied Science and Technology, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
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42
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Singh S, Agarwal M, Bhatt A, Goyal A, Moholkar VS. Ultrasound enhanced enzymatic hydrolysis of Parthenium hysterophorus: A mechanistic investigation. BIORESOURCE TECHNOLOGY 2015; 192:636-645. [PMID: 26094188 DOI: 10.1016/j.biortech.2015.06.031] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2015] [Revised: 06/05/2015] [Accepted: 06/06/2015] [Indexed: 06/04/2023]
Abstract
This study has attempted to establish the mechanism of the ultrasound-induced enhancement of enzymatic hydrolysis of pretreated and delignified biomass of Parthenium hysterophorus. A dual approach of statistical optimization of hydrolysis followed by application of sonication at optimum conditions has been adopted. The kinetics of hydrolysis shows a marked 6× increase with sonication, while net sugar yield shows marginal rise of ∼ 20%. The statistical experimental design reveals the hydrolysis process to be enzyme limited. Profile of sugar yield in ultrasound-assisted enzymatic hydrolysis has been analyzed using HCH-1 model coupled with Genetic Algorithm optimization. The trends in the kinetic and physiological parameters of HCH-1 model reveal that sonication enhances enzyme/substrate affinity and reaction velocity of hydrolysis. The product inhibition of enzyme in all forms (free, adsorbed, complexed) also reduces with ultrasound. These effects are attributed to intense micro-convection induced by ultrasound and cavitation in the liquid medium.
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Affiliation(s)
- Shuchi Singh
- Center for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Mayank Agarwal
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Aditya Bhatt
- Department of Chemical Engineering, National Institute of Technology Tiruchirappalli, Tiruchirappalli 620 015, Tamil Nadu, India
| | - Arun Goyal
- Center for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India; Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Vijayanand S Moholkar
- Center for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India; Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India.
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43
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Singh S, Agarwal M, Sarma S, Goyal A, Moholkar VS. Mechanistic insight into ultrasound induced enhancement of simultaneous saccharification and fermentation of Parthenium hysterophorus for ethanol production. ULTRASONICS SONOCHEMISTRY 2015; 26:249-256. [PMID: 25813894 DOI: 10.1016/j.ultsonch.2015.02.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 01/21/2015] [Accepted: 02/25/2015] [Indexed: 05/24/2023]
Abstract
This paper presents investigations into mechanism of ultrasound assisted bioethanol synthesis using Parthenium hysterophorus biomass through simultaneous saccharification and fermentation (SSF) mode. Approach of coupling experimental results to mathematical model for SSF using Genetic Algorithm based optimization has been adopted. Comparison of model parameters for experiments with mechanical shaking and sonication (10% duty cycle) give an interesting mechanistic account of influence of ultrasound on SSF system. A 4-fold rise in ethanol and cell mass productivity is seen with ultrasound. The analysis reveals following facets of influence of ultrasound on SSF: increase in Monod constant for glucose for cell growth, maximal specific growth rate and inhibition constant of cell growth by glucose and reduction in specific cell death rate. Values of inhibition constant of cell growth by ethanol (K3E), and constants for growth associated (a) and non-growth associated (b) ethanol production remained unaltered with sonication. Beneficial effects of ultrasound are attributed to enhanced cellulose hydrolysis, enhanced trans-membrane transport of substrate and products as well as dilution of the toxic substances due to micro-convection induced by ultrasound. Intrinsic physiological functioning of cells remained unaffected by ultrasound as indicated by unaltered values of K3E, a and b.
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Affiliation(s)
- Shuchi Singh
- Centre for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Mayank Agarwal
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Shyamali Sarma
- Centre for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Arun Goyal
- Centre for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India; Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India.
| | - Vijayanand S Moholkar
- Centre for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India; Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India.
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44
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Behzadnia A, Montazer M, Rad MM. In-situ sonosynthesis of nano N-doped ZnO on wool producing fabric with photo and bio activities, cell viability and enhanced mechanical properties. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015; 149:103-15. [DOI: 10.1016/j.jphotobiol.2015.05.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Revised: 05/04/2015] [Accepted: 05/06/2015] [Indexed: 10/23/2022]
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45
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Bhasarkar JB, Dikshit PK, Moholkar VS. Ultrasound assisted biodesulfurization of liquid fuel using free and immobilized cells of Rhodococcus rhodochrous MTCC 3552: A mechanistic investigation. BIORESOURCE TECHNOLOGY 2015; 187:369-378. [PMID: 25863901 DOI: 10.1016/j.biortech.2015.03.102] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 02/01/2015] [Accepted: 03/09/2015] [Indexed: 06/04/2023]
Abstract
This paper attempts to gain mechanistic insight into enhancement effect of sonication on biodesulfurization. The approach has been to fit Haldane kinetics model to dibenzothiophene (DBT) metabolism and analyze trends in model parameters concurrently with simulations of cavitation bubble dynamics. Mechanistic synergy between sonication and biodesulfurization is revealed to be of both physical and chemical nature. Generation of micro-turbulence in medium by sonication leads to fine emulsification and enhancement of DBT transport across organic/aqueous interphase. Microturbulence also enhances transport of substrate and product across cell wall that increases reaction velocity (Vmax). Michaelis constant (Km) and inhibition constant (KI), being intrinsic parameters, remain unaffected by sonication. Radicals produced by transient cavitation oxidize DBT to DBT-sulfoxide and DBT-sulfone (intermediates of metabolism), which contributes enhancement of biodesulfurization. However, high shear generated by ultrasound and cavitation has adverse effect on action of surfactant β-cyclodextrin for enhancement of interphase transport of DBT.
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Affiliation(s)
- Jaykumar B Bhasarkar
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Pritam Kumar Dikshit
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Vijayanand S Moholkar
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India.
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Merouani S, Ferkous H, Hamdaoui O, Rezgui Y, Guemini M. A method for predicting the number of active bubbles in sonochemical reactors. ULTRASONICS SONOCHEMISTRY 2015; 22:51-8. [PMID: 25127247 DOI: 10.1016/j.ultsonch.2014.07.015] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Revised: 06/13/2014] [Accepted: 07/21/2014] [Indexed: 05/24/2023]
Abstract
Knowledge of the number of active bubbles in acoustic cavitation field is very important for the prediction of the performance of ultrasonic reactors toward most chemical processes induced by ultrasound. The literature in this field is scarce, probably due to the complicated nature of the phenomena. We introduce here a relatively simple semi-empirical method for predicting the number of active bubbles in an acoustic cavitation field. By coupling the bubble dynamics in an acoustical field with chemical kinetics occurring in the bubble during oscillation, the amount of the radical species OH and HO2 and molecular H2O2 released by a single bubble was estimated. Knowing that the H2O2 measured experimentally during sonication of water comes from the recombination of hydroxyl (OH) and perhydroxyl (HO2) radicals in the liquid phase and assuming that in sonochemistry applications, the cavitation is transient and the bubble fragments at the first collapse, the number of bubbles formed per unit time per unit volume is then easily determined using material balances for H2O2, OH and HO2 in the liquid phase. The effect of ultrasonic frequency on the number of active bubbles was examined. It was shown that increasing ultrasonic frequency leads to a substantial increase in the number of bubbles formed in the reactor.
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Affiliation(s)
- Slimane Merouani
- Laboratory of Environmental Engineering, Department of Process Engineering, Faculty of Engineering, Badji Mokhtar - Annaba University, P.O. Box 12, 23000 Annaba, Algeria; Department of Chemical Engineering, Faculty of Pharmaceutical Engineering Process, University of Constantine 3, Constantine, Algeria
| | - Hamza Ferkous
- Laboratory of Environmental Engineering, Department of Process Engineering, Faculty of Engineering, Badji Mokhtar - Annaba University, P.O. Box 12, 23000 Annaba, Algeria
| | - Oualid Hamdaoui
- Laboratory of Environmental Engineering, Department of Process Engineering, Faculty of Engineering, Badji Mokhtar - Annaba University, P.O. Box 12, 23000 Annaba, Algeria.
| | - Yacine Rezgui
- Laboratory of Applied Chemistry and Materials Technology, University of Oum El-Bouaghi, P.O. Box 358, 04000 Oum El Bouaghi, Algeria
| | - Miloud Guemini
- Laboratory of Applied Chemistry and Materials Technology, University of Oum El-Bouaghi, P.O. Box 358, 04000 Oum El Bouaghi, Algeria
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47
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Bhasarkar JB, Singh M, Moholkar VS. Mechanistic insight into phase transfer agent assisted ultrasonic desulfurization. RSC Adv 2015. [DOI: 10.1039/c5ra12178g] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This paper attempts to gain physical insight into the phase transfer agent (PTA) assisted ultrasonic oxidative desulfurization process.
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Affiliation(s)
- Jaykumar B. Bhasarkar
- Department of Chemical Engineering
- Indian Institute of Technology Guwahati
- Guwahati – 781039
- India
| | - Mohit Singh
- Department of Chemical Engineering
- National Institute of Technology Tiruchirapalli
- Tiruchirapalli – 620015
- India
| | - Vijayanand S. Moholkar
- Department of Chemical Engineering
- Indian Institute of Technology Guwahati
- Guwahati – 781039
- India
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Hindryawati N, Maniam GP. Novel utilization of waste marine sponge (Demospongiae) as a catalyst in ultrasound-assisted transesterification of waste cooking oil. ULTRASONICS SONOCHEMISTRY 2015; 22:454-462. [PMID: 24842471 DOI: 10.1016/j.ultsonch.2014.04.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 04/21/2014] [Accepted: 04/21/2014] [Indexed: 06/03/2023]
Abstract
This study demonstrates the potential of Na-silica waste sponge as a source of low cost catalyst in the transesterification of waste cooking oil aided by ultrasound. In this work an environmentally friendly and efficient transesterification process using Na-loaded SiO2 from waste sponge skeletons as a solid catalyst is presented. The results showed that the methyl esters content of 98.4±0.4wt.% was obtainable in less than an hour (h) of reaction time at 55°C. Optimization of reaction parameters revealed that MeOH:oil, 9:1; catalyst, 3wt.% and reaction duration of 30min as optimum reaction conditions. The catalyst is able to tolerant free fatty acid and moisture content up to 6% and 8%, respectively. In addition, the catalyst can be reused for seven cycles while maintaining the methyl esters content at 86.3%. Ultrasound undoubtedly assisted in achieving this remarkable result in less than 1h reaction time. For the kinetics study at 50-60°C, a pseudo first order model was proposed, and the activation energy of the reaction is determined as 33.45kJ/mol using Arrhenius equation.
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Affiliation(s)
- Noor Hindryawati
- Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang, Lebuhraya Tun Razak, 26300 Gambang, Kuantan, Pahang, Malaysia; Faculty of Mathematics and Natural Sciences, Mulawarman University, Gunung Kelua, 75113 Samarinda, East Borneo, Indonesia
| | - Gaanty Pragas Maniam
- Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang, Lebuhraya Tun Razak, 26300 Gambang, Kuantan, Pahang, Malaysia; Central Laboratory, Universiti Malaysia Pahang, Lebuhraya Tun Razak, 26300 Gambang, Kuantan, Pahang, Malaysia.
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Chakma S, Moholkar VS. Investigation in mechanistic issues of sonocatalysis and sonophotocatalysis using pure and doped photocatalysts. ULTRASONICS SONOCHEMISTRY 2015; 22:287-99. [PMID: 24986798 DOI: 10.1016/j.ultsonch.2014.06.008] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2014] [Revised: 06/09/2014] [Accepted: 06/10/2014] [Indexed: 05/25/2023]
Abstract
This paper attempts to investigate the mechanistic issues of two hybrid advanced oxidation processes (HAOPs), viz. sonocatalysis and sonophotocatalysis, in which the two individual AOPs, viz. sonolysis and photocatalysis, are combined. Three photocatalysts, viz. pure ZnO and Fe-doped ZnO (with two protocols) have been employed. Fe-doped ZnO catalyst has been characterized using standard techniques. Decolorization of two textile dyes has been used as the model reaction. With experiments that alter the characteristics of ultrasound and cavitation phenomena in the medium, the exact synergy between the two AOPs has been determined using a quantitative yard stick. The results revealed a negative synergy between the two AOPs, which is an almost consistent result for decolorization of both dyes using all three photocatalysts. Fe-doping of ZnO catalyst helps in generation of more OH radicals that could augment decolorization. However, these radical mainly react with dye molecules adsorbed on catalyst surface. Intense shock waves generated by cavitation bubbles cause desorption of dye molecules from catalyst surface and reduce the probability of dye-radical interaction, thus reducing the net utility of photochemically generated OH radicals towards dye decolorization. This is rationale underlying the negative synergy between sonolysis and photocatalysis. Fe-doped ZnO catalyst increases the extent of decolorization, but the synergy between the two individual AOPs remains unaltered with doping.
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Affiliation(s)
- Sankar Chakma
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Vijayanand S Moholkar
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India.
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Singh S, Sarma S, Agarwal M, Goyal A, Moholkar VS. Ultrasound enhanced ethanol production from Parthenium hysterophorus: A mechanistic investigation. BIORESOURCE TECHNOLOGY 2014; 188:287-94. [PMID: 25555927 DOI: 10.1016/j.biortech.2014.12.038] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 12/10/2014] [Accepted: 12/12/2014] [Indexed: 05/24/2023]
Abstract
This study presents mechanistic investigations in ultrasound-assisted bioethanol fermentation using Parthenium hysterophorus biomass. Ultrasound (35 kHz, 10% duty cycle) has been used for sonication. Experimental results were fitted to mathematical model; the kinetic and physiological parameters in the model were obtained using Genetic Algorithm (GA) based optimization. In control experiments (mechanical shaking), maximum ethanol titer of 10.93 g/L and cell mass concentration of 5.26 g/L was obtained after 18 h. In test experiments (mechanical shaking and intermittent sonication), ethanol titer of 12.14 g/L and cell mass concentration of 5.7 g/L was obtained in 10h. This indicated ∼ 2 × enhanced productivity of ethanol and cell mass with sonication. Trends in model parameters obtained after fitting of model to experimental data essentially revealed that beneficial influence of ultrasound on fermentation is a manifestation of enhanced trans-membrane transportation and dilution of toxic substances due to strong micro-convection induced by ultrasound.
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Affiliation(s)
- Shuchi Singh
- Center for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Shyamali Sarma
- Center for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Mayank Agarwal
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Arun Goyal
- Center for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India; Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Vijayanand S Moholkar
- Center for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India; Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India.
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