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Wei X, Liu D, Huang W, Huang W, Lei Z. Simultaneously enhanced Cu bioleaching from E-wastes and recovered Cu ions by direct current electric field in a bioelectrical reactor. BIORESOURCE TECHNOLOGY 2020; 298:122566. [PMID: 31848043 DOI: 10.1016/j.biortech.2019.122566] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 12/02/2019] [Accepted: 12/03/2019] [Indexed: 06/10/2023]
Abstract
In this study, a proof-of-concept of bioleaching and recovery of copper (Cu) from E-wastes assisted by direct current (DC) electric field was proved in a bioelectrical reactor. Results showed that 40 mA electric current application could not only significantly shorten the leaching time of Cu from 5 (control) to 3 days with 100% leaching efficiency, but also recover about 97% leached Cu ions within 4 days. DC electric field improved the activity and growth of iron oxidizing bacteria and facilitated Fe2+ oxidation, which resulted in effective leaching of Cu from printed circuit boards (PCBs). The functional Acidithiobacillus was selectively enriched by DC electric field for enhancing the efficiency of bioleaching. At the same time, the leached Cu ions were rapidly electrodeposited on the cathode, achieving the recovery of Cu. Hence, this work provided a novel strategy for metals bioleaching and recovery from E-wastes.
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Affiliation(s)
- Xiaocheng Wei
- Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, College of Environmental Science and Engineering, Nankai University, No. 94, Weijin Road, Nankai District, Tianjin 300350, China
| | - Dongfang Liu
- Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, College of Environmental Science and Engineering, Nankai University, No. 94, Weijin Road, Nankai District, Tianjin 300350, China
| | - Wenli Huang
- Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, College of Environmental Science and Engineering, Nankai University, No. 94, Weijin Road, Nankai District, Tianjin 300350, China.
| | - Weiwei Huang
- College of Ecology and Environment, Hainan University, No. 58. Renmin Road, Meilan District, Haikou 570228, China
| | - Zhongfang Lei
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305 8572, Japan
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Ishii T, Kawaichi S, Nakagawa H, Hashimoto K, Nakamura R. From chemolithoautotrophs to electrolithoautotrophs: CO2 fixation by Fe(II)-oxidizing bacteria coupled with direct uptake of electrons from solid electron sources. Front Microbiol 2015; 6:994. [PMID: 26500609 PMCID: PMC4593280 DOI: 10.3389/fmicb.2015.00994] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Accepted: 09/07/2015] [Indexed: 11/22/2022] Open
Abstract
At deep-sea vent systems, hydrothermal emissions rich in reductive chemicals replace solar energy as fuels to support microbial carbon assimilation. Until recently, all the microbial components at vent systems have been assumed to be fostered by the primary production of chemolithoautotrophs; however, both the laboratory and on-site studies demonstrated electrical current generation at vent systems and have suggested that a portion of microbial carbon assimilation is stimulated by the direct uptake of electrons from electrically conductive minerals. Here we show that chemolithoautotrophic Fe(II)-oxidizing bacterium, Acidithiobacillus ferrooxidans, switches the electron source for carbon assimilation from diffusible Fe2+ ions to an electrode under the condition that electrical current is the only source of energy and electrons. Site-specific marking of a cytochrome aa3 complex (aa3 complex) and a cytochrome bc1 complex (bc1 complex) in viable cells demonstrated that the electrons taken directly from an electrode are used for O2 reduction via a down-hill pathway, which generates proton motive force that is used for pushing the electrons to NAD+ through a bc1 complex. Activation of carbon dioxide fixation by a direct electron uptake was also confirmed by the clear potential dependency of cell growth. These results reveal a previously unknown bioenergetic versatility of Fe(II)-oxidizing bacteria to use solid electron sources and will help with understanding carbon assimilation of microbial components living in electronically conductive chimney habitats.
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Affiliation(s)
- Takumi Ishii
- Department of Applied Chemistry, School of Engineering, The University of Tokyo Tokyo, Japan
| | - Satoshi Kawaichi
- Biofunctional Catalyst Research Team, RIKEN Center for Sustainable Resource Science Saitama, Japan
| | - Hirotaka Nakagawa
- Department of Applied Chemistry, School of Engineering, The University of Tokyo Tokyo, Japan
| | - Kazuhito Hashimoto
- Department of Applied Chemistry, School of Engineering, The University of Tokyo Tokyo, Japan
| | - Ryuhei Nakamura
- Biofunctional Catalyst Research Team, RIKEN Center for Sustainable Resource Science Saitama, Japan
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Yin X, Qiao S, Zhou J. Using electric field to enhance the activity of anammox bacteria. Appl Microbiol Biotechnol 2015; 99:6921-30. [DOI: 10.1007/s00253-015-6631-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Revised: 04/18/2015] [Accepted: 04/22/2015] [Indexed: 05/28/2023]
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Qiao S, Yin X, Zhou J, Furukawa K. Inhibition and recovery of continuous electric field application on the activity of anammox biomass. Biodegradation 2013; 25:505-13. [PMID: 24258098 DOI: 10.1007/s10532-013-9677-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Accepted: 11/15/2013] [Indexed: 11/26/2022]
Abstract
In this study, the effects of electric field on the activity of anammox biomass were investigated. In batch mode, experimental results demonstrated that the nitrogen removal rate enhanced by 25.6 % compared with the control experiment at the electric field of 2 V/cm with application time of 20 min. However, continuous application (24 h) of electric field impacted a mal-effect on anammox biomass during the intensity between 1 and 4 V/cm. After the electric field was removed, the activity of anammox biomass could recover within 2 weeks. This implied that the mal-effect of electric field on anammox biomass was reversible. The decrease of heme c contents and crude enzyme activity demonstrated to be the main reason for the depress of the anammox biomass activity. Transmission electron microscope observation also proved the morphological change of anammox biomass under electric field.
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Affiliation(s)
- Sen Qiao
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, People's Republic of China,
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Mogi T, Ishii T, Hashimoto K, Nakamura R. Low-voltage electrochemical CO2 reduction by bacterial voltage-multiplier circuits. Chem Commun (Camb) 2013; 49:3967-9. [PMID: 23302819 DOI: 10.1039/c2cc37986d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using the voltage-multiplying circuits of chemolitho-autotrophic Fe-oxidizing bacteria (Mariprofundus ferrooxydans), we describe an integrated bioelectrochemical system that affords simultaneous CO2 reduction and H2O oxidation at an external voltage of less than 1.24 V.
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Affiliation(s)
- Taketo Mogi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Tokyo 113-8656, Japan
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Sasaki D, Sasaki K, Watanabe A, Morita M, Igarashi Y, Ohmura N. Efficient production of methane from artificial garbage waste by a cylindrical bioelectrochemical reactor containing carbon fiber textiles. AMB Express 2013; 3:17. [PMID: 23497472 PMCID: PMC3608157 DOI: 10.1186/2191-0855-3-17] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Accepted: 03/01/2013] [Indexed: 11/30/2022] Open
Abstract
A cylindrical bioelectrochemical reactor (BER) containing carbon fiber textiles (CFT; BER + CFT) has characteristics of bioelectrochemical and packed-bed systems. In this study, utility of a cylindrical BER + CFT for degradation of a garbage slurry and recovery of biogas was investigated by applying 10% dog food slurry. The working electrode potential was electrochemically regulated at −0.8 V (vs. Ag/AgCl). Stable methane production of 9.37 L-CH4 · L−1 · day−1 and dichromate chemical oxygen demand (CODcr) removal of 62.5% were observed, even at a high organic loading rate (OLR) of 89.3 g-CODcr · L−1 · day−1. Given energy as methane (372.6 kJ · L−1 · day−1) was much higher than input electric energy to the working electrode (0.6 kJ · L−1 · day−1) at this OLR. Methanogens were highly retained in CFT by direct attachment to the cathodic working electrodes (52.3%; ratio of methanogens to prokaryotes), compared with the suspended fraction (31.2%), probably contributing to the acceleration of organic material degradation and removal of organic acids. These results provide insight into the application of cylindrical BER + CFT in efficient methane production from garbage waste including a high percentage of solid fraction.
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Sasaki D, Sasaki K, Morita M, Hirano SI, Matsumoto N, Ohmura N. Bioelectrochemical regulation accelerates facultatively syntrophic proteolysis. J Biosci Bioeng 2012; 114:59-63. [DOI: 10.1016/j.jbiosc.2012.02.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Revised: 01/31/2012] [Accepted: 02/15/2012] [Indexed: 12/01/2022]
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Li X, Liu Y, Zeng G, Niu Y, Xiao X, Xu W, Xia W, Zhu Y, Liu J. Direct current stimulation of Thiobacillus ferrooxidans bacterial metabolism in a bioelectrical reactor without cation-specific membrane. BIORESOURCE TECHNOLOGY 2010; 101:6035-6038. [PMID: 20227275 DOI: 10.1016/j.biortech.2010.02.094] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2009] [Revised: 02/23/2010] [Accepted: 02/23/2010] [Indexed: 05/28/2023]
Abstract
A bioelectrical reactor without cation-specific membrane was designed to test effects of direct electrical current on growth of Thiobacillus ferrooxidans bacterium. The results indicated that the cell significantly enhanced the growth of T. ferrooxidans. At a current of 30 mA, the maximum cells density reached 1.39 x 10(9)cells/mL within 84 h, which was 10 times faster than under a conventional cultivation method, in which electrical current is not used. A lag phase during the growth of T. ferrooxidans was observed when direct electrical current was applied, and the lag phase became longer under higher current intensity.
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Affiliation(s)
- Xin Li
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China.
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Thrash JC, Coates JD. Review: Direct and indirect electrical stimulation of microbial metabolism. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2008; 42:3921-31. [PMID: 18589946 DOI: 10.1021/es702668w] [Citation(s) in RCA: 193] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
All organisms require an electron donor and acceptor, frequently in chemical form, but an elegant alternative is to supply these via direct electrochemical means. Electricity has been used to stimulate microbial metabolism for over 50 years. Since the first report of oxygenating media using anodic oxygen generation from electrolysis in 1956, researchers have made use of applied power systems to supply energy for microbial respiratory processes from fermentations to anaerobic reduction of toxic pollutants. Bioelectrical reactors (BERs) have been utilized for culturing organisms, influencing metabolite production, and biotransformation of a wide array of compounds. Both enrichment and pure cultures have been cultivated in the presence of applied current, showcasing the applicative diversity of these systems. As the need for more environmentally conscious solutions to waste-treatment, remediation, and cultivation efforts increases, systems that supply energy to microorganisms without chemical amendment are becoming more attractive. Additionally, the essential flexibility of BERs offers an almost unlimited range of solutions for metabolic stimulation and downstream application.
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Affiliation(s)
- J Cameron Thrash
- Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley California 94720, USA
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