植物微生物燃料电池中的薇甘菊生物发电和生物修复潜力

IF 8 Q1 ENERGY & FUELS
Debajyoti Bose , Riya Bhattacharya , Pranathi Ganti , Alwiya Rizvi , Gopinath Halder , Arjun Sarkar
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引用次数: 0

摘要

在 p-MFC 中,活体植物在生物电化学回路中进行光合作用。植物从根部排出有机废料。在根瘤菌圈中,细菌通过氧化消耗这些废物,而大气则将其还原。这种氧化还原反应和光合作用可作为生物电加以利用。在这项研究中,利用植物 Withania somnifera (L.) Dunal 的根部渗出物和土壤中的有机物产生生物电。在多次循环操作之间,开路电压达到 930±21 mV。随着植物废弃物的富集,电池电压进一步增至 1260±140 mV。记录的峰值电压为 1400 mV。石墨纤维毡电极确保了微生物的均匀生长,在富集和未富集的情况下,功率密度分别达到 57 mW/m2 和 84 mW/m2。ATR-FTIR 显示,附着在土壤中碳基质上的特定化合物以及富集物中的多糖成分完全降解。此外,这项研究还监测了土壤 pH 值及其均匀性的变化,光合有效辐射、湿度和空气中二氧化碳含量的影响,以及这些因素如何影响植物生长,并最终影响根瘤层的微生物,从而实现生物修复和生物发电。扫描电子显微镜成像提供了更多证据,证明电化学活性土壤细菌的存在、厌氧环境和电极特性对导电生物膜的发展至关重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Bioelectricity production and bioremediation potential of Withania somnifera in plant microbial fuel cells

In p-MFCs living plants photosynthesize within a bio-electrochemical circuit. The plant exudes organic waste material from the roots. In the rhizosphere, bacteria consume these wastes by oxidizing them in contrast to the atmosphere that reduces it. This redox reaction along with photosynthesis can be harnessed as bioelectricity. In this work, the plant Withania somnifera (L.) Dunal was used for generating bioelectricity from the root exudates and organic matter available in the soil. An open circuit voltage of 930±21 mV was achieved between multiple cycles of operation. The cell voltage further increased to 1260±140 mV with enrichment in the form of discards from vegetable matter. The peak recorded voltage was 1400 mV. Graphite fibre felt electrodes ensured uniform microbial growth with power densities that were achieved at 57 mW/m2 and 84 mW/m2 with and without enrichment respectively. ATR-FTIR demonstrated complete degradation of specific compounds attached to the carbon matrix in the soil along with the polysaccharide content from the enrichments. Additionally, this work also monitored the changes in soil pH and its homogeneity, the impact of photosynthetically active radiation, humidity, and the presence of CO2 in the air, and how it affects plant growth and ultimately the microbes at the rhizosphere which accounted for the bioremediation and the resultant bioelectricity production. SEM imaging provided additional evidence that the presence of electrochemically active soil bacteria, an anaerobic environment, and electrode characteristics are crucial for the development of conductive biofilms.

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来源期刊
Energy nexus
Energy nexus Energy (General), Ecological Modelling, Renewable Energy, Sustainability and the Environment, Water Science and Technology, Agricultural and Biological Sciences (General)
CiteScore
7.70
自引率
0.00%
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0
审稿时长
109 days
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