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Liu H, Yu Y, Jiang S, Sun H, Zhang W, Chen J, Chen D. Enhancement of gaseous chlorobenzene biodegradation and power generation in a microbial fuel cell by bifunctional Acinetobacter sp. HY-99C. CHEMOSPHERE 2024; 350:141105. [PMID: 38171394 DOI: 10.1016/j.chemosphere.2023.141105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 12/11/2023] [Accepted: 12/31/2023] [Indexed: 01/05/2024]
Abstract
The efficient biodegradation of volatile chlorinated hydrocarbons using microbial fuel cells (MFCs) offers a feasible approach for purifying waste gas and alleviating energy crises. However, power generation is limited by poor pollutant biodegradation and slow electron transfer. The bifunctional bacterium Acinetobacter sp. HY-99C was screened and used to improve the performance of a conventional MFC. The inoculation of strain HY-99C into the conventional MFC promoted the formation of a compact biofilm with high metabolic activity and an enriched bifunctional genus (Acinetobacter), which resulted in the accelerated decomposition of chlorinated aromatic compounds into biodegradable organic acids. This led to efficient chlorobenzene removal and power generation from the MFC, with a chlorobenzene elimination capacity of 70.8 g m-3 h-1 and power density of 89.6 mW m-2, which are improved over those of previously reported MFCs. This study provides novel insights into enhancing pollutant removal and power generation in MFCs.
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Affiliation(s)
- Haoyang Liu
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, School of Life Sciences, Taizhou University, Taizhou, 318000, China; College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Yang Yu
- Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, College of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan, 316022, China; National & Local Joint Engineering Research Center of Harbor Oil & Gas Storage and Transportation Technology, College of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan, 316022, China
| | - Shengtao Jiang
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, School of Life Sciences, Taizhou University, Taizhou, 318000, China
| | - Haimin Sun
- Zhejiang Zhonglan Environmental Technology Co., Ltd, China
| | - Weixi Zhang
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Jianmeng Chen
- Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, College of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan, 316022, China; College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China; National & Local Joint Engineering Research Center of Harbor Oil & Gas Storage and Transportation Technology, College of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan, 316022, China
| | - Dongzhi Chen
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, School of Life Sciences, Taizhou University, Taizhou, 318000, China; Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, College of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan, 316022, China; College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China; National & Local Joint Engineering Research Center of Harbor Oil & Gas Storage and Transportation Technology, College of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan, 316022, China.
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Yang Z, Peng X, Zheng J, Wang Z. Plasma synthesis of oxygen vacancy-rich CuO/Cu 2(OH) 3NO 3 heterostructure nanosheets for boosting degradation performance. Phys Chem Chem Phys 2023; 25:29108-29119. [PMID: 37869910 DOI: 10.1039/d3cp03918h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2023]
Abstract
Defect regulation and the construction of a heterojunction structure are effective strategies to improve the catalytic activity of catalysts. In this work, the rapid conversion of CuO to Cu2(OH)3NO3 was achieved by fixing nitrogen in air as NO3- using dielectric barrier discharge (DBD) plasma. This innovative approach resulted in the successful synthesis of a CuO/Cu2(OH)3NO3 nanosheet heterostructure. Notably, the samples prepared using plasma exhibit thinner thickness and larger specific surface area. Importantly, oxygen vacancies are introduced, simultaneously forming heterojunction interfaces within the CuO/Cu2(OH)3NO3 structure. CuO/Cu2(OH)3NO3 using plasma effectively degraded 96% of methyl orange within 8 min in the dark. The degradation rate is 81 and 23 times that of CuO and Cu2(OH)3NO3 using hydrothermal methods, respectively. The high catalytic activity is attributed to the large specific surface area, the abundance of active sites, and the synergy between oxygen vacancies and the strong heterojunction interfacial interactions, which accelerate the transfer of electrons and the production of reactive oxygen species (˙O2- and ˙OH). The mechanism of plasma preparation was proposed on account of microstructure characterization and online mass spectroscopy, which indicated that gas etching, gas expansion, and the repulsive force of electrons play key roles in plasma exfoliation.
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Affiliation(s)
- Zikun Yang
- National Engineering Research Center of Industry Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, China.
| | - Xiangfeng Peng
- National Engineering Research Center of Industry Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, China.
| | - Jingxuan Zheng
- National Engineering Research Center of Industry Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, China.
| | - Zhao Wang
- National Engineering Research Center of Industry Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, China.
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