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Adding Zero-Valent Iron to Enhance Electricity Generation during MFC Start-Up

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  • Chao Li

    (Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China
    College of Environment, Hohai University, Nanjing 210098, China)

  • Kang Zhou

    (Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China
    College of Environment, Hohai University, Nanjing 210098, China)

  • Hanyue He

    (Jiangsu Yuzhi River Basin Management Technology Research Institute, Nanjing 210000, China)

  • Jiashun Cao

    (Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China
    College of Environment, Hohai University, Nanjing 210098, China)

  • Shihua Zhou

    (Third Design and Research Institute, Shanghai Municipal Engineering Design and Research General Institute, Shanghai 200092, China)

Abstract

The low power generation efficiency of microbial fuel cells (MFCs) is always a barrier to further development. An attempt to enhance the start-up and electricity generation of MFCs was investigated by adding different doses of zero-valent iron into anaerobic anode chambers in this study. The results showed that the voltage (289.6 mV) of A2 with 0.5 g of zero-valent iron added was higher than the reference reactor (197.1 mV) without dosing zero-valent iron (A4). The maximum power density of 27.3 mW/m 2 was obtained in A2. CV analysis demonstrated that A2 possessed a higher oxidation–reduction potential, hence showing a stronger oxidizing property. Meanwhile, electrochemical impedance analysis (EIS) also manifested that values of RCT of carbon felts with zero-valent iron supplemented (0.01–0.03 Ω) were generally lower. What is more, SEM images further proved and illustrated that A2 had compact and dense meshes with a hierarchical structure rather than a relatively looser biofilm in the other reactors. High-throughput sequencing analysis also indicated that zero-valent iron increased the abundance of some functional microbial communities, such as Acinetobacter, Ignavibacteriales, Shewanella , etc.

Suggested Citation

  • Chao Li & Kang Zhou & Hanyue He & Jiashun Cao & Shihua Zhou, 2020. "Adding Zero-Valent Iron to Enhance Electricity Generation during MFC Start-Up," IJERPH, MDPI, vol. 17(3), pages 1-15, January.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:3:p:806-:d:313696
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    References listed on IDEAS

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    1. Kumar, Ravinder & Singh, Lakhveer & Zularisam, A.W., 2016. "Exoelectrogens: Recent advances in molecular drivers involved in extracellular electron transfer and strategies used to improve it for microbial fuel cell applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 56(C), pages 1322-1336.
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    2. Md Tabish Noori & Dayakar Thatikayala & Booki Min, 2022. "Bioelectrochemical Remediation for the Removal of Petroleum Hydrocarbon Contaminants in Soil," Energies, MDPI, vol. 15(22), pages 1-22, November.

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