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<p>Plant-microbial fuel cells (PMFCs) are an emerging technology that integrates plant and electroactive bacterial for bioelectricity generation; however, under real conditions, their performance can be influenced by external environmental factors such as climatic conditions. In this study, <i>Philodendron cordatum</i> (PMFC 1) and <i>Juncus effusus</i> (PMFC 2) were planted directly in PMFC systems operated under real environmental conditions. The plants released root exudates into the anodic chambers, which served as a carbon source for <i>Geobacter sulfurreducens</i>. The systems were monitored considering environmental parameters such as solar radiation (850–1112&#xa0;W/m2), wind speed (2–34.5&#xa0;km/h), relative humidity (5–67%), and dissolved oxygen (0.4–6.9&#xa0;mg/L), determining their impact on voltage generation and electrochemical behavior. PMFCs performance were affected by plant species and the diffusion of atmospheric oxygen, which penetrated to the anodic chambers of the PMFCs causing fluctuations in the voltages, inhibition of <i>Geobacter sulfurreducens</i> and a partial nitrification process. The PMFC 2 achieved a maximum power density of 54&#xa0;mW/m2 and lower internal resistance (130&#xa0;Ω), while PMFC 1 showed a power density of 38&#xa0;mW/m2 and internal resistance of 180&#xa0;Ω. Enhanced charge transfer and redox activity were observed in PMFC 2, which suggests the development of a well-established electroactive biofilm on the anode surface, facilitating more efficient electron transfer processes. These results demonstrate the feasibility of PMFCs as a sustainable energy source in environments with variable environmental conditions, expanding their applicability in real-world scenarios.</p> Graphical abstract <p></p>

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Effect of uncontrolled environmental conditions on bioelectricity production using plant-microbial fuel cell eco-technology inoculated with Geobacter sulfurreducens

  • 期刊论文

  • 发表日期：

    2025年7月24日

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  • Edson Baltazar Estrada-Arriaga,
  • Andrea Alondra Torres-Álvarez,
  • Oscar Guadarrama-Pérez,
  • Karen Y. Bahena-Rabadan,
  • Cornelio Morales-Morales

摘要

Plant-microbial fuel cells (PMFCs) are an emerging technology that integrates plant and electroactive bacterial for bioelectricity generation; however, under real conditions, their performance can be influenced by external environmental factors such as climatic conditions. In this study, Philodendron cordatum (PMFC 1) and Juncus effusus (PMFC 2) were planted directly in PMFC systems operated under real environmental conditions. The plants released root exudates into the anodic chambers, which served as a carbon source for Geobacter sulfurreducens. The systems were monitored considering environmental parameters such as solar radiation (850–1112 W/m2), wind speed (2–34.5 km/h), relative humidity (5–67%), and dissolved oxygen (0.4–6.9 mg/L), determining their impact on voltage generation and electrochemical behavior. PMFCs performance were affected by plant species and the diffusion of atmospheric oxygen, which penetrated to the anodic chambers of the PMFCs causing fluctuations in the voltages, inhibition of Geobacter sulfurreducens and a partial nitrification process. The PMFC 2 achieved a maximum power density of 54 mW/m2 and lower internal resistance (130 Ω), while PMFC 1 showed a power density of 38 mW/m2 and internal resistance of 180 Ω. Enhanced charge transfer and redox activity were observed in PMFC 2, which suggests the development of a well-established electroactive biofilm on the anode surface, facilitating more efficient electron transfer processes. These results demonstrate the feasibility of PMFCs as a sustainable energy source in environments with variable environmental conditions, expanding their applicability in real-world scenarios.

Graphical abstract