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You J, Ye L, Kong X, Duan Y, Zhao J, Chen J, Chen D. Efficient biodechlorination at the Fe 3O 4-based silicone powder modified chlorobenzene-affinity anode. JOURNAL OF HAZARDOUS MATERIALS 2023; 457:131794. [PMID: 37315409 DOI: 10.1016/j.jhazmat.2023.131794] [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: 03/17/2023] [Revised: 05/14/2023] [Accepted: 06/05/2023] [Indexed: 06/16/2023]
Abstract
The treatment of chlorinated volatile organic compounds faces challenges of secondary pollution and less-efficiency due to the substitution of chlorine. Microbial fuel cells (MFCs) provide a promising opportunity for its abatement. In this study, a novel Fe3O4 nanoparticles and silicone-based powder (SP) were integrated and immobilized on carbon felt (CF+Fe3O4@SP), which was further used as anode in the chlorobenzene (CB) powered MFC. Owing to the cooperation between SP and Fe3O4, the anode exhibited excellent performance for both biodechlorination and power generation. The results indicated that the CF+Fe3O4@SP anode loaded MFC achieved 98.5% removal of 200 mg/L CB within 28 h, and the maximum power density was 675.9 mW/m3, which was a 45.6% increase compared to that of the bare CF anode. Microbial community analysis indicated that the genera Comamonadaceae, Pandoraea, Obscuribacteraceae, and Truepera were dominated, especially, the Comamonadaceae and Obscuribacteraceae showed outstanding affinity for Fe3O4 and SP, respectively. Moreover, the proportion of live bacteria, secretion of extracellular polymer substances, and protein content in the extracellular polymer substances were significantly increased by modifying Fe3O4@SP onto the carbon-based anode. Thus, this study provides new insights into the development of MFCs for refractory and hydrophobic volatile organic compounds removal.
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Affiliation(s)
- Juping You
- Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, Zhejiang Ocean University, Zhoushan 316022, China
| | - Lei Ye
- Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, Zhejiang Ocean University, Zhoushan 316022, China
| | - Xianwang Kong
- Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, Zhejiang Ocean University, Zhoushan 316022, China
| | - Yuqi Duan
- Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, Zhejiang Ocean University, Zhoushan 316022, China
| | - Jingkai Zhao
- Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, Zhejiang Ocean University, Zhoushan 316022, China; College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jianmeng Chen
- Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, Zhejiang Ocean University, Zhoushan 316022, China; College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Dongzhi Chen
- Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, Zhejiang Ocean University, Zhoushan 316022, China.
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Du J, Niu Y, Wu H, Konnerup D, Wu S, Ramírez-Vargas CA, Yang Y, Brix H, Arias CA. Effects of electroconductive materials on treatment performance and microbial community structure in biofilter systems with silicone tubings. CHEMOSPHERE 2022; 307:135828. [PMID: 35944690 DOI: 10.1016/j.chemosphere.2022.135828] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 06/19/2022] [Accepted: 07/22/2022] [Indexed: 06/15/2023]
Abstract
Biofilter systems coupling with microbial electrochemical technology can enhance the removal performance of pollutants. In this study, two types of coke (PK-A and PK-LSN) were used as electroconductive substrates in biofilter systems with silicone tubings. The results showed that the silicone tubings were beneficial for removing NH4+-N. The PK-A systems reached removal efficiencies up to 83.5-85.3% for NH4+-N without aeration. Compared to gravel systems, significantly higher removal efficiencies of NO3--N (84.8-95.4%) were obtained in coke systems, and better removal of PO43--P (91.9-95.7%) was also simultaneously achieved in PK-A systems. Redundancy analysis (RDA) indicated that the better performances of coke systems rely on the functions of both electroactive (Trichococcus and Sulfurovum) and non-electroactive bacteria (Clostridium_sensu_stricto_1, Propionicicella, and Acinetobacter). These findings highlight the important contribution of silicone tubings to oxygen supply and provide useful guidance for the application of coke in composite matrix systems.
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Affiliation(s)
- Jingjing Du
- School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, China; Department of Biology, Aarhus University, Aarhus, Denmark; Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Henan Province, China.
| | - Yulong Niu
- School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, China
| | - Haiming Wu
- Department of Biology, Aarhus University, Aarhus, Denmark; School of Environmental Science & Engineering, Shandong University, Qingdao, China
| | - Dennis Konnerup
- Department of Food Science, Aarhus University, Aarhus, Denmark
| | - Shubiao Wu
- Department of Agroecology, Aarhus University, Tjele, Denmark
| | - Carlos A Ramírez-Vargas
- Department of Biology, Aarhus University, Aarhus, Denmark; Aarhus University Centre for Water Technology (WATEC), Aarhus University, Aarhus, Denmark
| | - Yanqin Yang
- School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, China; Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Henan Province, China
| | - Hans Brix
- Department of Biology, Aarhus University, Aarhus, Denmark; Aarhus University Centre for Water Technology (WATEC), Aarhus University, Aarhus, Denmark
| | - Carlos A Arias
- Department of Biology, Aarhus University, Aarhus, Denmark; Aarhus University Centre for Water Technology (WATEC), Aarhus University, Aarhus, Denmark
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3D Flower-Like FeWO 4/CeO 2 Hierarchical Architectures on rGO for Durable and High-Performance Microalgae Biophotovoltaic Fuel Cells. Appl Biochem Biotechnol 2020; 192:751-769. [PMID: 32557232 DOI: 10.1007/s12010-020-03352-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 05/22/2020] [Indexed: 01/06/2023]
Abstract
A facile chemical reduction approach is adopted for the synthesis of iron tungstate (FeWO4)/ceria (CeO2)-decorated reduced graphene oxide (rGO) nanocomposite. Surface morphological studies of rGO/FeWO4/CeO2 composite reveal the formation of hierarchical FeWO4 flower-like microstructures on rGO sheets, in which the CeO2 nanoparticles are decorated over the FeWO4 microstructures. The distinct anodic peaks observed for the cyclic voltammograms of studied electrodes under light/dark regimes validate the electroactive proteins present in the microalgae. With the cumulative endeavors of three-dimensional FeWO4 microstructures, phase effect between rGO sheet and FeWO4/CeO2, highly exposed surface area, and light harvesting property of CeO2 nanoparticles, the relevant rGO/FeWO4/CeO2 nanocomposite demonstrates high power and stable biophotovoltaic energy generation compared with those of previous reports. Thus, these findings construct a distinct horizon to tailor a ternary nanocomposite with high electrochemical activity for the construction of cost-efficient and environmentally benign fuel cells.
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