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Rodriguez SY, Cantú ME, Garcia-Reyes B, Garza-Gonzalez MT, Meza-Escalante ER, Serrano D, Alvarez LH. Biotransformation of 4-nitrophenol by co-immobilized Geobacter sulfurreducens and anthraquinone-2-sulfonate in barium alginate beads. CHEMOSPHERE 2019; 221:219-225. [PMID: 30640004 DOI: 10.1016/j.chemosphere.2019.01.041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2018] [Revised: 12/13/2018] [Accepted: 01/06/2019] [Indexed: 05/17/2023]
Abstract
Geobacter sulfurreducens and anthraquinone-2-sulfonate (AQS) were used suspended and immobilized in barium alginate during the biotransformation of 4-nitrophenol (4-NP). The assays were conducted at different concentrations of 4-NP (50-400 mg/L) and AQS, either in suspended (0-400 μM) or immobilized form (0 or 760 μM), and under different pH values (5-9). G. sulfurreducens showed low capacity to reduce 4-NP in absence of AQS, especially at the highest concentrations of the contaminant. AQS improved the reduction rates from 0.0086 h-1, without AQS, to 0.149 h-1 at 400 μM AQS, which represent an increment of 17.3-fold. The co-immobilization of AQS and G. sulfurreducens in barium alginate beads (AQSi-Gi) increased the reduction rates up to 4.8- and 7.2-fold, compared to incubations with G. sulfurreducens in suspended and immobilized form, but in absence of AQS. AQSi-Gi provides to G. sulfurreducens a barrier against the possibly inhibiting effects of 4-NP.
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Affiliation(s)
- Sujei Y Rodriguez
- Universidad Autonoma de Nuevo Leon (UANL), Facultad de Ciencias Quimicas, Av. Universidad S/N, Cd. Universitaria, San Nicolas de los Garza, 66455, Nuevo Leon, Mexico
| | - Maria E Cantú
- Universidad Autonoma de Nuevo Leon (UANL), Facultad de Ciencias Quimicas, Av. Universidad S/N, Cd. Universitaria, San Nicolas de los Garza, 66455, Nuevo Leon, Mexico
| | - Bernardo Garcia-Reyes
- Universidad Autonoma de Nuevo Leon (UANL), Facultad de Ciencias Quimicas, Av. Universidad S/N, Cd. Universitaria, San Nicolas de los Garza, 66455, Nuevo Leon, Mexico
| | - Maria T Garza-Gonzalez
- Universidad Autonoma de Nuevo Leon (UANL), Facultad de Ciencias Quimicas, Av. Universidad S/N, Cd. Universitaria, San Nicolas de los Garza, 66455, Nuevo Leon, Mexico
| | - Edna R Meza-Escalante
- Instituto Tecnologico de Sonora (ITSON), Departamento de Ciencias del Agua y Medio Ambiente, 5 de Febrero 818 Sur, C.P. 85000, Cuidad Obregon, Sonora, Mexico
| | - Denisse Serrano
- Instituto Tecnologico de Sonora (ITSON), Departamento de Ciencias del Agua y Medio Ambiente, 5 de Febrero 818 Sur, C.P. 85000, Cuidad Obregon, Sonora, Mexico
| | - Luis H Alvarez
- Universidad Autonoma de Nuevo Leon (UANL), Facultad de Ciencias Quimicas, Av. Universidad S/N, Cd. Universitaria, San Nicolas de los Garza, 66455, Nuevo Leon, Mexico; Instituto Tecnologico de Sonora (ITSON), Departamento de Ciencias Agronomicas y Veterinarias, 5 de Febrero 818 Sur, C.P. 85000, Cuidad Obregon, Sonora, Mexico.
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Xu B, Lan JC, Sun Q, Hsueh C, Chen BY. Deciphering optimal biostimulation strategy of supplementing anthocyanin-abundant plant extracts for bioelectricity extraction in microbial fuel cells. BIOTECHNOLOGY FOR BIOFUELS 2019; 12:46. [PMID: 30867679 PMCID: PMC6396463 DOI: 10.1186/s13068-019-1385-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 02/20/2019] [Indexed: 05/06/2023]
Abstract
BACKGROUND Microbial fuel cells (MFCs) are effective biofuel devices that use indigenous microbes to directly convert chemical energy from organics oxidation into bioelectric energy. To maximize energy-converting efficiency for bioelectricity generation in MFCs, redox mediators (RMs) (e.g., extracts obtained from plant resource-Camellia green tea) have been explored for optimal stimulation upon electron transfer (ET) capabilities. Anthocyanins are natural antioxidants widely used in food science and medicinal industry. This first-attempt study revealed optimal strategies to augment extracts of anthocyanin-rich herbs (Lycium ruthenicum Murr., Clitoria ternatea Linn. and Vaccinium Spp.) as biofuel sources of catalytic RMs for stimulating bioenergy extraction in MFCs. RESULTS This work showed that extracts of anthocyanin-rich herbs were promising electroactive RMs. The maximal power density of MFCs supplemented with extract of L. ruthenicum Murr. was achieved, suggesting that extract of L. ruthenicum Murr. would be the most electrochemically appropriate RMs. Compared to C. ternatea Linn. and Vaccinium Spp., L. ruthenicum Murr. evidently owned the most significant redox-mediating capability to stimulate bioenergy extraction likely due to significantly high contents of polyphenols (e.g., anthocyanin). Evidently, increases in adenosine triphosphate (ATP) content directly responded to supplementation of anthocyanin-rich herbal extracts. It strongly suggested that the electron-shuttling characteristics of RMs upon electroactive microorganisms could effectively promote the electron transfer capability to maximize bioenergy extraction in MFCs. CONCLUSION Anthocyanin as the main water-soluble vacuolar pigments in plant products were very electroactive for not only excellent antioxidant activities, but also promising electron-shuttling capabilities for renewable biofuel applications. This work also suggested the electron-shuttling mechanism of RMs that could possibly promote electron transport phenomena through microbial cell membrane, further influencing the electron transport chain for efficient bioenergy generation.
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Affiliation(s)
- Bin Xu
- State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering, and Research Center for Learning Science, Southeast University, Nanjing, 210096 People’s Republic of China
- Department of Chemical and Materials Engineering, National I-Lan University, Yilan, 26047 Taiwan
| | - John Chiwei Lan
- Biorefinery and Bioprocess Engineering Laboratory, Department of Chemical Engineering and Materials Science, Yuan Ze University, Chungli, Taoyuan, 32003 Taiwan
| | - Qingjiang Sun
- State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering, and Research Center for Learning Science, Southeast University, Nanjing, 210096 People’s Republic of China
| | - Chungchuan Hsueh
- Department of Chemical and Materials Engineering, National I-Lan University, Yilan, 26047 Taiwan
| | - Bor-Yann Chen
- Department of Chemical and Materials Engineering, National I-Lan University, Yilan, 26047 Taiwan
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Liu SR, Cai LF, Wang LY, Yi XF, Peng YJ, He N, Wu X, Wang YP. Polydopamine coating on individual cells for enhanced extracellular electron transfer. Chem Commun (Camb) 2019; 55:10535-10538. [DOI: 10.1039/c9cc03847g] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The double-mediator electron transport pathway was achieved by PDA coating on the surface of individual cells to facilitate EET.
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Affiliation(s)
- Shu-Rui Liu
- Department of Chemical and Biochemical Engineering
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
- P. R. China
| | - Li-Fang Cai
- Department of Chemical and Biochemical Engineering
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
- P. R. China
| | - Liu-Ying Wang
- Department of Chemical and Biochemical Engineering
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
- P. R. China
| | - Xiao-Feng Yi
- Department of Chemical and Biochemical Engineering
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
- P. R. China
| | - Ya-Juan Peng
- Department of Chemical and Biochemical Engineering
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
- P. R. China
| | - Ning He
- Department of Chemical and Biochemical Engineering
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
- P. R. China
| | - Xuee Wu
- Department of Chemical and Biochemical Engineering
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
- P. R. China
| | - Yuan-Peng Wang
- Department of Chemical and Biochemical Engineering
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
- P. R. China
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