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Bao S, Chen B, Zhang Y, Ren L, Xin C, Ding W, Yang S, Zhang W. A comprehensive review on the ultrasound-enhanced leaching recovery of valuable metals: Applications, mechanisms and prospects. Ultrason Sonochem 2023; 98:106525. [PMID: 37453257 PMCID: PMC10371852 DOI: 10.1016/j.ultsonch.2023.106525] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 06/29/2023] [Accepted: 07/09/2023] [Indexed: 07/18/2023]
Abstract
In recent two decades, ultrasound has been broadly applied to the hydrometallurgical leaching process to recover valuable metals within raw materials, aiming to solve the shortcomings of the conventional leaching process, including relatively low leaching recovery, long leaching duration, high reagent usage, high energy consumption and so on. The present work focuses on a comprehensive overview of the ultrasound-enhanced leaching of various metals, such as common nonferrous and ferrous metals, rare metals, rare earth elements, and precious metals, from raw metal ores and secondary resources. Moreover, the enhanced leaching mechanisms by ultrasound are discussed in detail and summarized based on the improvement of leaching kinetics, enhancement of the mass transfer and diffusion of lixiviants, and promotion of the oxidative conversion of metals from insoluble to soluble states. Lastly, the challenges and outlooks of future research on the leaching recovery for valuable metals with the assistance of ultrasound irradiation are proposed.
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Affiliation(s)
- Shenxu Bao
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, PR China; Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan 430070, PR China; State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control, Wuhan University of Science and Technology, Wuhan 430081, PR China.
| | - Bo Chen
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, PR China.
| | - Yimin Zhang
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, PR China; Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan 430070, PR China; State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control, Wuhan University of Science and Technology, Wuhan 430081, PR China; Hubei Collaborative Innovation Center for High Efficient Utilization of Vanadium Resources, Wuhan University of Science and Technology, Wuhan 430081, PR China
| | - Liuyi Ren
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, PR China; Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan 430070, PR China
| | - Chunfu Xin
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, PR China
| | - Wei Ding
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, PR China
| | - Siyuan Yang
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, PR China; Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan 430070, PR China
| | - Wencai Zhang
- Department of Mining and Minerals Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24060, USA
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Bu X, Tong Z, Bilal M, Ren X, Ni M, Ni C, Xie G. Effect of ultrasound power on HCl leaching kinetics of impurity removal of aphanitic graphite. Ultrason Sonochem 2023; 95:106415. [PMID: 37098313 PMCID: PMC10149312 DOI: 10.1016/j.ultsonch.2023.106415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 04/11/2023] [Accepted: 04/17/2023] [Indexed: 05/04/2023]
Abstract
This study aimed to investigate the effect of ultrasonic power and temperature on the impurity removal rate during conventional and ultrasonic-assisted leaching of aphanitic graphite. The results showed that the ash removal rate increased gradually (∼50 %) with the increase in ultrasonic power and temperature but deteriorated at high power and temperature. The unreacted shrinkage core model was found to fit the experimental results better than other models. The Arrhenius equation was used to calculate the finger front factor and activation energy under different ultrasonic power conditions. The ultrasonic leaching process was significantly influenced by temperature, and the enhancement of the leaching reaction rate constant by ultrasound was mainly reflected in the increase of the pre-exponential factor A. Ultrasound treatment improved the efficiency of impurity mineral removal by destroying the inert layer formed on the graphite surface, promoting particle fragmentation, and generating oxidation radicals. The poor reactivity of hydrochloric acid with quartz and some silicate minerals is a bottleneck limiting the further improvement of impurity removal efficiency in ultrasound-assisted aphanitic graphite. Finally, the study suggests that introducing fluoride salts may be a promising method for deep impurity removal in the ultrasound-assisted hydrochloric acid leaching process of aphanitic graphite.
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Affiliation(s)
- Xiangning Bu
- Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou 221116, China.
| | - Zheng Tong
- Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou 221116, China
| | - Muhammad Bilal
- Department of Mining Engineering, Balochistan University of Information Technology, Engineering and Management Sciences (BUITEMS), Quetta, Pakistan
| | - Xibing Ren
- Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou 221116, China
| | - Mengqian Ni
- Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou 221116, China
| | - Chao Ni
- Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou 221116, China
| | - Guangyuan Xie
- Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou 221116, China
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Wu H, Zhang T, Lai X, Yu H, Li D, Zheng H, Chen H, Ohl C, Li Y. Influence of Surface Tension on Dynamic Characteristics of Single Bubble in Free-Field Exposed to Ultrasound. Micromachines 2022; 13:782. [PMID: 35630249 PMCID: PMC9147617 DOI: 10.3390/mi13050782] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 05/09/2022] [Accepted: 05/10/2022] [Indexed: 02/04/2023]
Abstract
The motion of bubbles in an ultrasonic field is a fundamental physical mechanism in most applications of acoustic cavitation. In these applications, surface-active solutes, which could lower the surface tension of the liquid, are always utilized to improve efficiency by reducing the cavitation threshold. This paper examines the influence of liquids’ surface tension on single micro-bubbles motion in an ultrasonic field. A novel experimental system based on high-speed photography has been designed to investigate the temporary evolution of a single bubble in the free-field exposed to a 20.43 kHz ultrasound in liquids with different surface tensions. In addition, the R-P equations in the liquid with different surface tension are solved. It is found that the influences of the surface tension on the bubble dynamics are obvious, which reflect on the changes in the maximum size and speed of the bubble margin during bubble oscillating, as well as the weaker stability of the bubble in the liquid with low surface tension, especially for the oscillating bubble with higher speed. These effects of the surface tension on the bubble dynamics can explain the mechanism of surfactants for promoting acoustic cavitation in numerous application fields.
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Min HS, Kim JH. Study of the Extraction Kinetics and Calculation of Effective Diffusivity and Mass Transfer Coefficient in Negative Pressure Cavitation Extraction of Paclitaxel from Taxus chinensis. BIOTECHNOL BIOPROC E 2022. [DOI: 10.1007/s12257-021-0311-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Yuan M, Kang Y, Shi H, Li D, Li H. Experimental Investigation on the Characteristic of Hydrodynamic-Acoustic Cavitation (HAC). JMSE 2022; 10:309. [DOI: 10.3390/jmse10030309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
This study aimed to investigate the Cavitation dynamics of Hydrodynamic-acoustic cavitation by employing experimental methods. The spatial distribution of cavitation clouds, the temporal and spatial distribution achieved by cavitation clouds, and the main flow structure in the flow field were extracted and analyzed by complying with the cavitating flow image captured with the high-speed camera. As indicated from the results, the widened cavitation region and the strength of cavitation under the synergy of ultrasound were reported. When the inlet pressure is 2 MPa, the average value of the volume-averaging cavitation intensity variable is 0.029, 0.058, and 0.092, respectively, and the corresponding growth rate is 95% and 58.5%. By adopting the Proper Orthogonal Decomposition method (POD), the ultrasound was revealed to primarily enhance the cavitation intensity by downregulating the cavitation threshold other than altering the large-scale vortex structure in the flow field. The high-frequency pressure pulsation of ultrasound strengthened the instability exhibited by the shear layer and induced small-scale vortex structures at the shear layer, which was suggested to be the more violently shed and collapse.
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Rokhsar Talabazar F, Jafarpour M, Zuvin M, Chen H, Gevari MT, Villanueva LG, Grishenkov D, Koşar A, Ghorbani M. Design and fabrication of a vigorous "cavitation-on-a-chip" device with a multiple microchannel configuration. Microsyst Nanoeng 2021; 7:44. [PMID: 34567757 PMCID: PMC8433160 DOI: 10.1038/s41378-021-00270-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 03/20/2021] [Accepted: 03/21/2021] [Indexed: 05/28/2023]
Abstract
Hydrodynamic cavitation is one of the major phase change phenomena and occurs with a sudden decrease in the local static pressure within a fluid. With the emergence of microelectromechanical systems (MEMS), high-speed microfluidic devices have attracted considerable attention and been implemented in many fields, including cavitation applications. In this study, a new generation of 'cavitation-on-a-chip' devices with eight parallel structured microchannels is proposed. This new device is designed with the motivation of decreasing the upstream pressure (input energy) required for facile hydrodynamic cavitation inception. Water and a poly(vinyl alcohol) (PVA) microbubble (MB) suspension are used as the working fluids. The results show that the cavitation inception upstream pressure can be reduced with the proposed device in comparison with previous studies with a single flow restrictive element. Furthermore, using PVA MBs further results in a reduction in the upstream pressure required for cavitation inception. In this new device, different cavitating flow patterns with various intensities can be observed at a constant cavitation number and fixed upstream pressure within the same device. Moreover, cavitating flows intensify faster in the proposed device for both water and the water-PVA MB suspension in comparison to previous studies. Due to these features, this next-generation 'cavitation-on-a-chip' device has a high potential for implementation in applications involving microfluidic/organ-on-a-chip devices, such as integrated drug release and tissue engineering.
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Affiliation(s)
- Farzad Rokhsar Talabazar
- Faculty of Engineering and Natural Science, Sabanci University, Tuzla, Istanbul Turkey
- Sabanci University Nanotechnology Research and Application Center, Tuzla, Istanbul Turkey
| | - Mohammad Jafarpour
- Faculty of Engineering and Natural Science, Sabanci University, Tuzla, Istanbul Turkey
- Sabanci University Nanotechnology Research and Application Center, Tuzla, Istanbul Turkey
| | - Merve Zuvin
- Faculty of Engineering and Natural Science, Sabanci University, Tuzla, Istanbul Turkey
- Advanced NEMS Laboratory, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Hongjian Chen
- Department of Biomedical Engineering and Health Systems, KTH Royal Institute of Technology, SE-141 57 Stockholm, Sweden
| | - Moein Talebian Gevari
- Division of Solid State Electronics, Department of Electrical Engineering, The Ångström Laboratory, Uppsala University, Uppsala, Sweden
| | - Luis Guillermo Villanueva
- Advanced NEMS Laboratory, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Dmitry Grishenkov
- Department of Biomedical Engineering and Health Systems, KTH Royal Institute of Technology, SE-141 57 Stockholm, Sweden
| | - Ali Koşar
- Faculty of Engineering and Natural Science, Sabanci University, Tuzla, Istanbul Turkey
- Sabanci University Nanotechnology Research and Application Center, Tuzla, Istanbul Turkey
- Center of Excellence for Functional Surfaces and Interfaces for Nano-Diagnostics (EFSUN), Sabanci University, Orhanli, Tuzla, Istanbul Turkey
| | - Morteza Ghorbani
- Sabanci University Nanotechnology Research and Application Center, Tuzla, Istanbul Turkey
- Department of Biomedical Engineering and Health Systems, KTH Royal Institute of Technology, SE-141 57 Stockholm, Sweden
- Center of Excellence for Functional Surfaces and Interfaces for Nano-Diagnostics (EFSUN), Sabanci University, Orhanli, Tuzla, Istanbul Turkey
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