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.
Int J Environ Res Public Health. 2020 Jan 28;17(3):806. doi: 10.3390/ijerph17030806.
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 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 , etc.
微生物燃料电池 (MFC) 的发电效率低一直是其进一步发展的障碍。本研究试图通过向厌氧阳极室中添加不同剂量的零价铁来提高 MFC 的启动和发电能力。结果表明，添加 0.5 g 零价铁的 A2 的电压（289.6 mV）高于未添加零价铁的对照反应器（A4）的电压（197.1 mV）。A2 获得了 27.3 mW/m 的最大功率密度。CV 分析表明，A2 具有更高的氧化还原电位，因此表现出更强的氧化性能。同时，电化学阻抗分析（EIS）也表明，添加零价铁的碳纤维毡的 RCT 值（0.01-0.03 Ω）普遍较低。此外，SEM 图像进一步证明并说明了 A2 具有比其他反应器中更紧密和密集的网格以及分层结构，而不是相对较宽松的生物膜。高通量测序分析还表明，零价铁增加了一些功能微生物群落的丰度，例如 ，等。
