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Cu(II) and Cr(VI) Removal in Tandem with Electricity Generation via Dual-Chamber Microbial Fuel Cells

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  • Hui Wang

    (State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
    Department of Municipal and Environmental Engineering, School of Water Resources and Hydro-Electric Engineering, Xi’an University of Technology, Xi’an 710048, China)

  • Yu Li

    (Department of Municipal and Environmental Engineering, School of Water Resources and Hydro-Electric Engineering, Xi’an University of Technology, Xi’an 710048, China)

  • Yue Mi

    (Department of Municipal and Environmental Engineering, School of Water Resources and Hydro-Electric Engineering, Xi’an University of Technology, Xi’an 710048, China)

  • Dongqi Wang

    (State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
    Department of Municipal and Environmental Engineering, School of Water Resources and Hydro-Electric Engineering, Xi’an University of Technology, Xi’an 710048, China)

  • Zhe Wang

    (State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
    Department of Municipal and Environmental Engineering, School of Water Resources and Hydro-Electric Engineering, Xi’an University of Technology, Xi’an 710048, China)

  • Haiyu Meng

    (State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
    Department of Municipal and Environmental Engineering, School of Water Resources and Hydro-Electric Engineering, Xi’an University of Technology, Xi’an 710048, China)

  • Chunbo Jiang

    (State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
    Department of Municipal and Environmental Engineering, School of Water Resources and Hydro-Electric Engineering, Xi’an University of Technology, Xi’an 710048, China)

  • Wen Dong

    (State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
    Department of Municipal and Environmental Engineering, School of Water Resources and Hydro-Electric Engineering, Xi’an University of Technology, Xi’an 710048, China)

  • Jiake Li

    (State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
    Department of Municipal and Environmental Engineering, School of Water Resources and Hydro-Electric Engineering, Xi’an University of Technology, Xi’an 710048, China)

  • Huaien Li

    (State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
    Department of Municipal and Environmental Engineering, School of Water Resources and Hydro-Electric Engineering, Xi’an University of Technology, Xi’an 710048, China)

Abstract

Microbial fuel cells (MFCs) have shown great advantages in electricity production, heavy metal removal, and energy recovery. However, the impact and mechanism of conflicting effects of numerous electron acceptors on heavy metal removal remain unknown. The effects of different initial heavy metal concentrations, cathodic dissolved oxygen, and electrode materials on the electricity generation and heavy metal removal efficiencies of Cu(II) and Cr(VI) were investigated in this study. When the initial concentration of Cr(VI) increased from 10 mg/L to 150 mg/L, the maximum voltage, coulomb efficiency, and maximum power density declined from 99 to 44 mV, 28.63% to 18.97%, and 14.29 to 0.62 mW/m 2 , and the removal efficiencies of Cu(II) and Cr(VI) decreased dramatically from 98.34% and 99.92% to 67.09% and 37.06%, respectively. Under anaerobic cathodic conditions, the removal efficiency and removal rate of Cu(II) and Cr(VI) were lower than those under aerobic conditions. When the cathode electrode was titanium sheet and graphite plate, the coulomb efficiency and maximum power density increased to 38.18%, 50.71%, 33.95 mW/m 2 , and 62.23 mW/m 2 . The removal efficiency and removal rates of Cu(II) and Cr(VI) were significantly increased to 98.09%, 86.13%, and 0.47, 0.50 mg/(L h) with a graphite plate, respectively. The pH of the cathode varied considerably greater as the MFC current increased. Cu(II) and Cr(VI) were removed and reduced to elemental Cu, Cu 2 O, and its oxides as well as Cr(OH) 3 and Cr 2 O 3 precipitates on the cathode electrode by cathodic bioelectrochemical reduction.

Suggested Citation

  • Hui Wang & Yu Li & Yue Mi & Dongqi Wang & Zhe Wang & Haiyu Meng & Chunbo Jiang & Wen Dong & Jiake Li & Huaien Li, 2023. "Cu(II) and Cr(VI) Removal in Tandem with Electricity Generation via Dual-Chamber Microbial Fuel Cells," Sustainability, MDPI, vol. 15(3), pages 1-13, January.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:3:p:2388-:d:1049761
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    References listed on IDEAS

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    1. Daniele Cecconet & Arianna Callegari & Andrea G. Capodaglio, 2018. "Bioelectrochemical Systems for Removal of Selected Metals and Perchlorate from Groundwater: A Review," Energies, MDPI, vol. 11(10), pages 1-21, October.
    2. Yifan Yu & Jafar Ali & Yuesuo Yang & Peijing Kuang & Wenjing Zhang & Ying Lu & Yan Li, 2022. "Synchronous Cr(VI) Remediation and Energy Production Using Microbial Fuel Cell from a Subsurface Environment: A Review," Energies, MDPI, vol. 15(6), pages 1-22, March.
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    Cited by:

    1. Xinglan Cui & Qingdong Miao & Xinyue Shi & Peng Zheng & Hongxia Li, 2023. "Accelerating Electricity Generation and Cr (VI) Removal Using Anatase–Biochar-Modified Cathode Microbial Fuel Cells," Sustainability, MDPI, vol. 15(16), pages 1-15, August.
    2. Liu, Hong-zhou & Chen, Tie-zhu & Wang, Nan & Zhang, Yu-rui & Li, Jian-chang, 2024. "A new strategy for improving MFC power output by shared electrode MFC–MEC coupling," Applied Energy, Elsevier, vol. 359(C).

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