101
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Li J, Wang J, Zhao X, Wang W, Liu D, Chen S, Ye X, Ding T. Inactivation of
Staphylococcus aureus
and
Escherichia coli
in milk by different processing sequences of ultrasound and heat. J Food Saf 2018. [DOI: 10.1111/jfs.12614] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jiao Li
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and EquipmentZhejiang University Hangzhou Zhejiang China
- Key Laboratory for Agro‐Products Postharvest Handling of Ministry of AgricultureZhejiang Key Laboratory for Agro‐Food Processing Hangzhou Zhejiang China
| | - Jun Wang
- College of Food Science and Engineering, Qingdao Agricultural University Qingdao Shandong China
| | - Xihong Zhao
- Key Laboratory for Green Chemical Process of Ministry of EducationSchool of Chemical Engineering and Pharmacy, Wuhan Institute of Technology Wuhan China
| | - Wenjun Wang
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and EquipmentZhejiang University Hangzhou Zhejiang China
- Key Laboratory for Agro‐Products Postharvest Handling of Ministry of AgricultureZhejiang Key Laboratory for Agro‐Food Processing Hangzhou Zhejiang China
| | - Donghong Liu
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and EquipmentZhejiang University Hangzhou Zhejiang China
- Key Laboratory for Agro‐Products Postharvest Handling of Ministry of AgricultureZhejiang Key Laboratory for Agro‐Food Processing Hangzhou Zhejiang China
| | - Shiguo Chen
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and EquipmentZhejiang University Hangzhou Zhejiang China
- Key Laboratory for Agro‐Products Postharvest Handling of Ministry of AgricultureZhejiang Key Laboratory for Agro‐Food Processing Hangzhou Zhejiang China
| | - Xingqian Ye
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and EquipmentZhejiang University Hangzhou Zhejiang China
- Key Laboratory for Agro‐Products Postharvest Handling of Ministry of AgricultureZhejiang Key Laboratory for Agro‐Food Processing Hangzhou Zhejiang China
| | - Tian Ding
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and EquipmentZhejiang University Hangzhou Zhejiang China
- Key Laboratory for Agro‐Products Postharvest Handling of Ministry of AgricultureZhejiang Key Laboratory for Agro‐Food Processing Hangzhou Zhejiang China
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102
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MUATASIM R, MA H, YANG X. Effect of multimode ultrasound assisted extraction on the yield of crude polysaccharides from Lycium Barbarum (Goji). FOOD SCIENCE AND TECHNOLOGY 2018. [DOI: 10.1590/1678-457x.14417] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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103
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Possible Effects and Mechanisms of Ultrasonic Cavitation on Oxide Inclusions during Direct-Chill Casting of an Al Alloy. METALS 2018. [DOI: 10.3390/met8100814] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Oxide films or inclusions can reduce the continuity and integrity of materials and they always lead to a significant reduction in the mechanical properties of an aluminum alloy. They can greatly reduce the plastic flow behavior of materials, thus affecting the subsequent processing performance. Therefore, an effective ultrasonic assisted preparation technology has been applied to industrial manufacturing of large-scale aluminum alloy ingots (with diameter: Φ = 1250 mm and height: h = 3750 mm). However, the mechanisms of ultrasonic purification on the large-scale ingots are not clear. Therefore, a number of aluminum alloy casting experiments were carried out to produce a conventional hot top semi-continuous ingot (CHTI) and an ultrasonic hot top semi-continuous ingot (UHTI) in this work. The microstructures of CHTI and UHTI were analyzed by optical microscopy (OM) and scanning electron microscopy (SEM). The results indicated that there were some oxide film defects in the CHTI but some finely dispersed inclusion particles were discovered in the UHTI. The X-ray diffraction (XRD) data showed that the component of inclusion was Al2O3. According to the different cavitation effects of the different areas of the molten aluminum, the process of ultrasonic purification was divided into three periods and the mechanisms in each period were separately studied.
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104
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Wang Q, Qin X, Liang Z, Li S, Cai J, Zhu Z, Liu G. HPLC–DAD–ESI–MS2 analysis of phytochemicals from Sichuan red orange peel using ultrasound-assisted extraction. FOOD BIOSCI 2018. [DOI: 10.1016/j.fbio.2018.07.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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105
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Nazari R, Rajić L, Xue Y, Zhou W, Alshawabkeh AN. Degradation of 4-Chlorophenol in Aqueous Solution by Sono-Electro-Fenton Process. INT J ELECTROCHEM SC 2018; 13:9214-9230. [PMID: 30568538 PMCID: PMC6296483 DOI: 10.20964/2018.09.46] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Electro-Fenton (EF) and ultrasound radiation (US) have been of interest for the removal of chlorinated compounds from water. This study evaluates the effects of different parameters on sono-electro-Fenton (SEF) for degradation of 4-chlorophenol (4-CP) in an aqueous solution. This study uses pulsing US waves along with Pd-catalyzed EF to degrade contaminants in water while maintaining temperature. The usage of pulsing US waves along with Pd catalyzed EF to remove contaminants while maintaining temperature has not been reported previously. SEF ability to degrade 4-CP was compared with the performance of each process (EF and sonolysis) alone. Initial pH, current density, background electrolyte, Fe2+ concentration, Pd/Al2O3 catalyst concentration, US waves, and sonifier amplitude were optimized in a two electrode (Ti/mixed metal oxide or Ti/MMO) batch system. The degradation of 4-CP increased from 1.85% by US to 83% by EF to nearly >99.9% by coupled SEF. With US radiation under 70% amplitude and 1:10 ON/OFF ratio, the removal rate of 4-CP increased to 98% compared to 62% under EF alone within the first 120 min in the presence of 80 mg L-1 Fe2+, 16.94 mA cm-2 of current density, 1 g L-1 Pd/Al2O3 catalyst (10 mg Pd), and initial pH of 3. However, the degradation rate decreased after 120 min of treatment, and complete 4-CP removal was observed after 300 minutes. The sonolysis impacted the 4-CP removal under coupled SEF, mostly due to the contribution of mass transfer (micromixing), while radical formation was found to be absent under the conditions tested (20kHz). The pulsed US was found to increase the temperature by only 8.7°C, which was found not to impact the 4-CP volatilization or degradation. These results imply that low-level US frequency through pulses is a practical and efficient approach to support electro-Fenton reaction, improving reaction rates without the need for electrolyte cooling.
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Affiliation(s)
- Roya Nazari
- Department of Civil and Environmental Engineering, Northeastern University, 400 Snell Engineering, 360 Huntington Avenue, Boston, MA 02115, USA
| | - Ljiljana Rajić
- Department of Civil and Environmental Engineering, Northeastern University, 400 Snell Engineering, 360 Huntington Avenue, Boston, MA 02115, USA
| | - Yunfei Xue
- Department of Civil and Environmental Engineering, Northeastern University, 400 Snell Engineering, 360 Huntington Avenue, Boston, MA 02115, USA.,State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, P.R. China
| | - Wei Zhou
- Department of Civil and Environmental Engineering, Northeastern University, 400 Snell Engineering, 360 Huntington Avenue, Boston, MA 02115, USA.,Department of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P.R. China
| | - Akram N Alshawabkeh
- Department of Civil and Environmental Engineering, Northeastern University, 400 Snell Engineering, 360 Huntington Avenue, Boston, MA 02115, USA
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106
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Pawar SV, Rathod VK. Ultrasound assisted process intensification of uricase and alkaline protease enzyme co-production in Bacillus licheniformis. ULTRASONICS SONOCHEMISTRY 2018; 45:173-179. [PMID: 29705310 DOI: 10.1016/j.ultsonch.2018.03.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 03/07/2018] [Accepted: 03/10/2018] [Indexed: 06/08/2023]
Abstract
Low energy ultrasound irradiation was used to enhance co-production of enzymes uricase and alkaline protease using Bacillus licheniformis NRRL 14209. Production of uricase and alkaline protease was evaluated for different ultrasound parameters such as ultrasound power, time of irradiation, duty cycle and growth stage of organisms at which irradiation is carried out. Maximum uricase production of 0.825 U/mL and alkaline protease of 0.646 U/mL have been obtained when fermentation broth was irradiated at 6 h of growth stage with 60 W power for 15 min of duration having 40% of duty cycle. The enzyme yield was found to be enhanced by a factor of 1.9-3.8 and 1.2-2.2 for uricase and alkaline protease respectively. Nevertheless, intracellular uricase was also observed in a fermentation broth after ultrasonic process intensification. The results indicate the effectiveness of low frequency ultrasound in improving enzyme yields with a vision of commercial applicability of the process.
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Affiliation(s)
- Shweta V Pawar
- Department of Chemical Engineering, Institute of Chemical Technology, N.P. Marg, Matunga, Mumbai, India
| | - Virendra K Rathod
- Department of Chemical Engineering, Institute of Chemical Technology, N.P. Marg, Matunga, Mumbai, India.
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107
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Lais H, Lowe PS, Gan TH, Wrobel LC. Numerical modelling of acoustic pressure fields to optimize the ultrasonic cleaning technique for cylinders. ULTRASONICS SONOCHEMISTRY 2018; 45:7-16. [PMID: 29705327 DOI: 10.1016/j.ultsonch.2018.02.045] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Revised: 02/09/2018] [Accepted: 02/26/2018] [Indexed: 05/28/2023]
Abstract
Fouling build up is a well-known problem in the offshore industry. Accumulation of fouling occurs in different structures, e.g. offshore pipes, ship hulls, floating production platforms. The type of fouling that accumulates is dependent on environmental conditions surrounding the structure itself. Current methods deployed for fouling removal span across hydraulic, chemical and manual, all sharing the common disadvantage of necessitating halting production for the cleaning process to commence. Conventionally, ultrasound is used in ultrasonic baths to clean a submerged component by the generation and implosion of cavitation bubbles on the fouled surface; this method is particularly used in Reverse Osmosis applications. However, this requires the submersion of the fouled structure and thus may require a halt to production. Large fouled structures such as pipelines may not be accommodated. The application of high power ultrasonics is proposed in this work as a means to remove fouling on a structure whilst in operation. The work presented in this paper consists of the development of a finite element analysis model based on successful cleaning results from a pipe fouled with calcite on the inner pipe wall. A Polytec 3D Laser Doppler Vibrometer was used in this investigation to study the fouling removal process. Results show the potential of high power ultrasonics for fouling removal in pipe structures from the wave propagation across the structure under excitation, and are used to validate a COMSOL model to determine cleaning patterns based on pressure and displacement distributions for future transducer array design and optimization.
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Affiliation(s)
- Habiba Lais
- Brunel Innovation Centre, Granta Park, Great Abington, Cambridge CB21 6AL, UK; Brunel University, Kingston Lane, Uxbridge, Middlesex UB8 3PH, UK.
| | - Premesh S Lowe
- Brunel Innovation Centre, Granta Park, Great Abington, Cambridge CB21 6AL, UK
| | - Tat-Hean Gan
- Brunel Innovation Centre, Granta Park, Great Abington, Cambridge CB21 6AL, UK.
| | - Luiz C Wrobel
- Brunel University, Kingston Lane, Uxbridge, Middlesex UB8 3PH, UK
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108
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Terán Hilares R, Kamoei DV, Ahmed MA, da Silva SS, Han JI, Santos JCD. A new approach for bioethanol production from sugarcane bagasse using hydrodynamic cavitation assisted-pretreatment and column reactors. ULTRASONICS SONOCHEMISTRY 2018; 43:219-226. [PMID: 29555278 DOI: 10.1016/j.ultsonch.2018.01.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 01/17/2018] [Accepted: 01/20/2018] [Indexed: 06/08/2023]
Abstract
Hydrodynamic cavitation (HC) was adopted to assist alkaline-hydrogen peroxide pretreatment of sugarcane bagasse (SCB). In the following condition: 0.29 M of NaOH, 0.78% (v/v) of H2O2, 9.95 min of process time and 3 bar of inlet pressure, 95.4% of digestibility of cellulosic fraction was achieved. To take the best use of the pretreated biomass, the overall process was intensified by way of employing a packed bed flow-through column reactor and thus enabling to handle a high solid loading of 20%, thereby leading to cellulose and hemicellulose conversions to 74.7% and 75%, respectively. In the fermentation step, a bubble column reactor was introduced to maximize ethanol production from the pretreated SCB by Scheffersomyces stipitis NRRL-Y7124, resulting in 31.50 g/L of ethanol, 0.49 g/g of ethanol yield and 0.68 g/L.h of productivity. All this showed that our HC-assisted NaOH-H2O2 pretreatment strategy along with the process intensification approach might offer an option for SCB-based biorefineries.
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Affiliation(s)
- Ruly Terán Hilares
- Department of Biotechnology, Engineering School of Lorena, University of São Paulo, CEP 12602-810, Brazil.
| | - Douglas Viana Kamoei
- Department of Biotechnology, Engineering School of Lorena, University of São Paulo, CEP 12602-810, Brazil
| | - Muhammad Ajaz Ahmed
- Department of Civil and Environmental Engineering, KAIST, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea
| | - Silvio Silvério da Silva
- Department of Biotechnology, Engineering School of Lorena, University of São Paulo, CEP 12602-810, Brazil
| | - Jong-In Han
- Department of Civil and Environmental Engineering, KAIST, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea
| | - Júlio César Dos Santos
- Department of Biotechnology, Engineering School of Lorena, University of São Paulo, CEP 12602-810, Brazil
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109
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Yi C, Lu Q, Wang Y, Wang Y, Yang B. Degradation of organic wastewater by hydrodynamic cavitation combined with acoustic cavitation. ULTRASONICS SONOCHEMISTRY 2018; 43:156-165. [PMID: 29555271 DOI: 10.1016/j.ultsonch.2018.01.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 12/30/2017] [Accepted: 01/10/2018] [Indexed: 05/14/2023]
Abstract
In this paper, the decomposition of Rhodamine B (RhB) by hydrodynamic cavitation (HC), acoustic cavitation (AC) and the combination of these individual methods (HAC) have been investigated. The degradation of 20 L RhB aqueous solution was carried out in a self-designed HAC reactor, where hydrodynamic cavitation and acoustic cavitation could take place in the same space simultaneously. The effects of initial concentration, inlet pressure, solution temperature and ultrasonic power were studied and discussed. Obvious synergies were found in the HAC process. The combined method achieved the best conversion, and the synergistic effect in HAC was even up to 119% with the ultrasonic power of 220 W in a treatment time of 30 min. The time-independent synergistic factor based on rate constant was introduced and the maximum value reached 40% in the HAC system. Besides, the hybrid HAC method showed great superiority in energy efficiency at lower ultrasonic power (88-176 W). Therefore, HAC technology can be visualized as a promising method for wastewater treatment with good scale-up possibilities.
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Affiliation(s)
- Chunhai Yi
- School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
| | - Qianqian Lu
- School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Yun Wang
- Zhejiang Institute of Mechanical and Electrical Engineering Co., LTD, Hangzhou, Zhejiang 310051, China
| | - Yixuan Wang
- School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Bolun Yang
- School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
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110
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Preparing graphene oxide–copper composite material from spent lithium ion batteries and catalytic performance analysis. RESEARCH ON CHEMICAL INTERMEDIATES 2018. [DOI: 10.1007/s11164-018-3410-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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111
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Liao X, Li J, Suo Y, Chen S, Ye X, Liu D, Ding T. Multiple action sites of ultrasound on Escherichia coli and Staphylococcus aureus. FOOD SCIENCE AND HUMAN WELLNESS 2018. [DOI: 10.1016/j.fshw.2018.01.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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112
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Zhang Y, Gao Y, Du X. Stability mechanisms of oscillating vapor bubbles in acoustic fields. ULTRASONICS SONOCHEMISTRY 2018; 40:808-814. [PMID: 28946489 DOI: 10.1016/j.ultsonch.2017.08.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 08/14/2017] [Accepted: 08/27/2017] [Indexed: 05/27/2023]
Abstract
Vapor bubble instability could enhance the sonochemical activities and accelerate the reaction rate. In the present paper, vapor bubble instability in acoustic fields is investigated through combining both the spherical and stiffness stabilities within a wide range of parameter zone (consisting of bubble radius, acoustic frequency and pressure amplitude) in order to determine the stability states of vapor bubbles. The status of bubble oscillations are divided into four zones in terms of their stability characteristics. Influences of several paramount parameters on the bubble stability are demonstrated in detail. Different orders of spherical instability are quantitatively given together with cases in high-frequency and low-frequency limits. The practical applications of the present work are twofold: identification of the parameter zones with rapid sonochemical reactions; validity of the spherical bubble assumption for simplification of the numerical studies.
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Affiliation(s)
- Yuning Zhang
- Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, Ministry of Education, North China Electric Power University, Beijing 102206, China.
| | - Yuhang Gao
- Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, Ministry of Education, North China Electric Power University, Beijing 102206, China
| | - Xiaoze Du
- Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, Ministry of Education, North China Electric Power University, Beijing 102206, China
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113
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Ji R, Virot M, Pflieger R, Podor R, Le Goff X, Nikitenko SI. Controlled "golf ball shape" structuring of Mg surface under acoustic cavitation. ULTRASONICS SONOCHEMISTRY 2018; 40:30-40. [PMID: 28946429 DOI: 10.1016/j.ultsonch.2017.06.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 06/21/2017] [Accepted: 06/22/2017] [Indexed: 06/07/2023]
Abstract
This manuscript describes the original structuring of Mg materials under ultrasound irradiation in mild conditions. Golf ball like extended structures can be prepared in dilute oxalic solutions at 20°C under high frequency ultrasound (200kHz). An original approach carried out through iterative 3D reconstruction of sonicated surfaces is used to describe surface evolutions and characterize the formed microstructures. A combination of SEM, ICP-AES, contact-angle measurements, and 3D image analyses allows to characterize the roughness and mass loss evolutions, and investigate the mechanism of formation for such architectures. A screening of the sonication experiments clearly points out an ultrasound frequency dependency for the effects generated at the surface. 200kHz sonication in 0.01M oxalic acid provides an unprecedented manufacturing of Mg samples which result from a controlled and localized dissolution of the material and characterized by a strong wetting surface with a roughness of 170nm. The additional formation of newly formed secondary phases appearing with surface dissolution progress is also deciphered. More generally, the ultrasonic procedure used to prepare these engineered surfaces opens new alternatives for the nano- and micro-structuring of metallic materials which may exhibit advanced physical and chemical properties of potential interest for a large community.
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Affiliation(s)
- Ran Ji
- Université de Montpellier, Institut de Chimie Séparative de Marcoule (ICSM), UMR 5257, CEA-CNRS-UM-ENSCM, Lab. Sonochemistry in Complex Fluids (LSFC) and Lab. Study of Matter in Environmental Conditions (L2ME), Site de Marcoule, BP17171, 30207 Bagnols sur Cèze Cedex, France
| | - Matthieu Virot
- Université de Montpellier, Institut de Chimie Séparative de Marcoule (ICSM), UMR 5257, CEA-CNRS-UM-ENSCM, Lab. Sonochemistry in Complex Fluids (LSFC) and Lab. Study of Matter in Environmental Conditions (L2ME), Site de Marcoule, BP17171, 30207 Bagnols sur Cèze Cedex, France.
| | - Rachel Pflieger
- Université de Montpellier, Institut de Chimie Séparative de Marcoule (ICSM), UMR 5257, CEA-CNRS-UM-ENSCM, Lab. Sonochemistry in Complex Fluids (LSFC) and Lab. Study of Matter in Environmental Conditions (L2ME), Site de Marcoule, BP17171, 30207 Bagnols sur Cèze Cedex, France
| | - Renaud Podor
- Université de Montpellier, Institut de Chimie Séparative de Marcoule (ICSM), UMR 5257, CEA-CNRS-UM-ENSCM, Lab. Sonochemistry in Complex Fluids (LSFC) and Lab. Study of Matter in Environmental Conditions (L2ME), Site de Marcoule, BP17171, 30207 Bagnols sur Cèze Cedex, France
| | - Xavier Le Goff
- Université de Montpellier, Institut de Chimie Séparative de Marcoule (ICSM), UMR 5257, CEA-CNRS-UM-ENSCM, Lab. Sonochemistry in Complex Fluids (LSFC) and Lab. Study of Matter in Environmental Conditions (L2ME), Site de Marcoule, BP17171, 30207 Bagnols sur Cèze Cedex, France
| | - Sergey I Nikitenko
- Université de Montpellier, Institut de Chimie Séparative de Marcoule (ICSM), UMR 5257, CEA-CNRS-UM-ENSCM, Lab. Sonochemistry in Complex Fluids (LSFC) and Lab. Study of Matter in Environmental Conditions (L2ME), Site de Marcoule, BP17171, 30207 Bagnols sur Cèze Cedex, France
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114
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Misra NN, Martynenko A, Chemat F, Paniwnyk L, Barba FJ, Jambrak AR. Thermodynamics, transport phenomena, and electrochemistry of external field-assisted nonthermal food technologies. Crit Rev Food Sci Nutr 2017; 58:1832-1863. [DOI: 10.1080/10408398.2017.1287660] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- N. N. Misra
- GTECH, Research & Development, General Mills India Private Limited, Mumbai, India
| | - Alex Martynenko
- Department of Engineering, Faculty of Agriculture, Dalhousie University, Canada
| | - Farid Chemat
- Avignon University, INRA, Green Extraction Team, Avignon, France
| | - Larysa Paniwnyk
- Faculty of Health and Life Sciences, Coventry University, U.K
| | - Francisco J. Barba
- Faculty of Pharmacy, Preventive Medicine & Public Health, Food Science, Toxicology & Forensic Medicine Department, University of València, València, Spain
| | - Anet Režek Jambrak
- Faculty of Food Technology & Biotechnology, University of Zagreb, Zagreb, Croatia
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115
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Mirzadeh E, Akhbari K, Phuruangrat A, Costantino F. A survey on the effects of ultrasonic irradiation, reaction time and concentration of initial reagents on formation of kinetically or thermodynamically stable copper(I) metal-organic nanomaterials. ULTRASONICS SONOCHEMISTRY 2017; 35:382-388. [PMID: 27771269 DOI: 10.1016/j.ultsonch.2016.10.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 10/15/2016] [Accepted: 10/16/2016] [Indexed: 06/06/2023]
Abstract
In order to evaluation the effects of ultrasonic irradiations, concentration of initial reagents and reaction time on formation [Cu4(MBT)4] or [Cu6(MBT)6] copper(I) metal-organic nanomaterials, [HMBT=2-Mercaptobenzothiazole], we designed some experiments and synthesized six samples under different conditions. These nanostructures were characterized by IR spectroscopy, X-ray powder diffraction (XRD) and Scanning Electron Microscopy (SEM). It seems that the tetranuclear cluster of [Cu4(MBT)4] (2) is the kinetically stable product which is formed at the initial time of the reaction and as the time went, it converts to thermodynamically stable product of [Cu6(MBT)6] (1) with hexanuclear cluster unit. In the samples which synthesized with low concentration of initial reagents, against to those synthesized with high concentration of initial reagents, the ultrasonic irradiation does not have any effect on formation of any special morphology.
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Affiliation(s)
- Elham Mirzadeh
- School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6455, Tehran, Islamic Republic of Iran
| | - Kamran Akhbari
- School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6455, Tehran, Islamic Republic of Iran.
| | - Anukorn Phuruangrat
- Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, Thailand
| | - Ferdinando Costantino
- Departement of Chemistry, Biology and Biotechnologies, University of Perugia, Perugia, Italy
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116
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Wu C, De Visscher A, Gates ID. Reactions of hydroxyl radicals with benzoic acid and benzoate. RSC Adv 2017. [DOI: 10.1039/c7ra05488b] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Density functional theory was used to study the mechanism and kinetics of benzoic acid with hydroxyl radicals in both gas and aqueous phases as well as benzoate with hydroxyl radicals in the aqueous phase at the M06-2X/6-311+G(d,p) level of theory.
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Affiliation(s)
- Chongchong Wu
- Department of Chemical and Petroleum Engineering
- University of Calgary
- Canada
| | - Alex De Visscher
- Department of Chemical and Petroleum Engineering
- University of Calgary
- Canada
- Department of Chemical and Materials Engineering
- Concordia University
| | - Ian Donald Gates
- Department of Chemical and Petroleum Engineering
- University of Calgary
- Canada
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117
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Merouani S, Hamdaoui O. The size of active bubbles for the production of hydrogen in sonochemical reaction field. ULTRASONICS SONOCHEMISTRY 2016; 32:320-327. [PMID: 27150777 DOI: 10.1016/j.ultsonch.2016.03.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 03/26/2016] [Accepted: 03/26/2016] [Indexed: 05/24/2023]
Abstract
The sonication of aqueous solution generates microscopic cavitation bubbles that may growth and violently collapse to produce highly reactive species (i.e. OH, HO2 and H2O2), hydrogen and emit light, sonoluminescence. The bubble size is a key parameter that influences the chemical activity of the system. This wok aims to study theoretically the size of active bubbles for the production of hydrogen in ultrasonic cavitation field in water using a single bubble sonochemistry model. The effect of several parameters such as frequency of ultrasound, acoustic intensity and liquid temperature on the range of sonochemically active bubbles for the production of hydrogen was clarified. The numerical simulation results showed that the size of active bubbles is an interval which includes an optimum value at which the production rate of H2 is maximal. It was shown that the range of ambient radius for an active bubble as well as the optimum bubble radius for the production of hydrogen increased with increasing acoustic intensity and decreased with increasing ultrasound frequency and bulk liquid temperature. It was found that the range of ambient bubble radius dependence of the operational conditions followed the same trend as those reported experimentally for sonoluminescing bubbles. Comparison with literature data showed a good agreement between the theoretical determined optimum bubble sizes for the production of hydrogen and the experimental reported sizes for sonoluminescing bubbles.
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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 Process Engineering, University of Constantine 3, 25000 Constantine, 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
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Nguyen DD, Ngo HH, Yoon YS, Chang SW, Bui HH. A new approach involving a multi transducer ultrasonic system for cleaning turbine engines' oil filters under practical conditions. ULTRASONICS 2016; 71:256-263. [PMID: 27423027 DOI: 10.1016/j.ultras.2016.07.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Revised: 06/22/2016] [Accepted: 07/05/2016] [Indexed: 06/06/2023]
Abstract
The purpose of this paper is to provide a green technology that can clean turbine engine oil filters effectively in ships using ultrasound, with ultrasonic devices having a frequency of 25kHz and different powers of 300W and 600W, respectively. The effects of temperature, ultrasonic cleaning times, pressure losses through the oil filter, solvent washing, and ultrasonic power devices were investigated. In addition, the cleaning efficiency of three modes (hand washing, preliminary washing and ultrasonic washing) were compared to assess their relative effectiveness. Experimental results revealed that the necessary ultrasonic time varied significantly depending on which solvent was used for washing. For instance, the optimum ultrasonic cleaning time was 50-60min when the oil filter was cleaned in a solvent of kerosene oil (KO) and over 80min when in a solvent of diesel oil (DO) using the same ultrasonic generator device (25kHz, 600W) and experimental conditions. Furthermore, microscopic examination did not reveal any damage or breakdown on or within the structure of the filter after ultrasonic cleaning, even in the filter's surfaces at a constantly low frequency of 25kHz and power specific capacity (100W/gal). Overall, it may be concluded that ultrasound-assisted oil filter washing is effective, requiring a significantly shorter time than manual washing. This ultrasonic method also shows promise as a green technology for washing oil filters in turbine engines in general and Vietnamese navy ships in particular, because of its high cleaning efficiency, operational simplicity and savings.
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Affiliation(s)
- Dinh Duc Nguyen
- Department of Environmental Energy & Engineering, Kyonggi University, 443-760, Republic of Korea; Ho Chi Minh City University of Natural Resources and Environment, Viet Nam.
| | - Huu Hao Ngo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney (UTS), 15 Broadway, Ultimo, NSW 2007, Australia
| | - Yong Soo Yoon
- Department of Chemical Engineering, Dankook University, 448-701, Republic of Korea
| | - Soon Woong Chang
- Department of Environmental Energy & Engineering, Kyonggi University, 443-760, Republic of Korea
| | - Hong Ha Bui
- Institute for Tropicalization and Environment (ITE), Ho Chi Minh City, Viet Nam.
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119
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Gogate PR, Patil PN. Sonochemical Reactors. Top Curr Chem (Cham) 2016; 374:61. [DOI: 10.1007/s41061-016-0064-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2016] [Accepted: 08/05/2016] [Indexed: 11/29/2022]
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Qiu S, Xu S, Li G, Yang J. Synergetic Effect of Ultrasound, the Heterogeneous Fenton Reaction and Photocatalysis by TiO₂ Loaded on Nickel Foam on the Degradation of Pollutants. MATERIALS 2016; 9:ma9060457. [PMID: 28773580 PMCID: PMC5456745 DOI: 10.3390/ma9060457] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 05/04/2016] [Accepted: 05/17/2016] [Indexed: 12/03/2022]
Abstract
The synergistic effect of ultrasound, the heterogeneous Fenton reaction and photocatalysis was studied using a nickel foam (NF)-supporting TiO2 system and rhodamine B (RhB) as a target. The NF-supporting TiO2 system was prepared by depositing TiO2 on the skeleton of NF repeatedly and then calcining it. To optimize the conditions and parameters, the catalytic activity was tested in four systems (ultrasound alone (US), nickel foam (NF), US/NF and NF/US/H2O2). The optimal conditions were fixed at 0.1 g/mL NF, initial 5.00 mg/L RhB, 300 W ultrasonic power, pH = 3 and 5.00 mg/L H2O2. The effects of the dissolution of nickel from NF and quenching of the Fenton reaction were studied on degradation efficiency. When the heterogeneous Fenton reaction is combined with TiO2-photocatalysis, the pollutant removal efficiency is enhanced significantly. Through this synergistic effect, 22% and 80% acetochlor was degraded within 10 min and 80 min, respectively.
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Affiliation(s)
- Shan Qiu
- School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150006, China.
- State Laboratory of Urban Water Resources and Environment, Harbin Institute of Technology, Harbin 150006, China.
| | - Shanwen Xu
- School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150006, China.
- State Laboratory of Urban Water Resources and Environment, Harbin Institute of Technology, Harbin 150006, China.
| | - Guangming Li
- School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150006, China.
| | - Jixian Yang
- School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150006, China.
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Rivas DF, Verhaagen B. Preface to the Special Issue: Cleaning with bubbles. ULTRASONICS SONOCHEMISTRY 2016; 29:517-518. [PMID: 26585025 DOI: 10.1016/j.ultsonch.2015.11.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- David Fernández Rivas
- Mesoscale Chemical Systems Group, University of Twente, 7500AE Enschede, The Netherlands; BuBclean, Institutenweg 25, 7521PH Enschede, The Netherlands
| | - Bram Verhaagen
- BuBclean, Institutenweg 25, 7521PH Enschede, The Netherlands
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