数字农科院2.0

Response of biocurrent conduction to soil microenvironment

文献类型： 外文期刊

作者： Side Yang;Danfeng Li;Xin Yu;Mohan Bai;Huike Ye;Yang Sun;Lixia Zhao;Yali Chen;Xiaojing Li;Yongtao Li

作者机构：

关键词： Biocurrent;Environmental factors;Extracellular electron transfer;Microbial electrochemical system;Soil

期刊名称： Electrochemistry Communications

ISSN： 1388-2481

年卷期： 2024 年 161 卷

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： The biocurrent generated by soil extracellular electron transfer (EET) partly drives biogeochemical cycles and controls soil quality. However, it is unclear how the soil abiotic and biotic conditions affect the biocurrent conduction. In this study, the response relationship of soil microenvironment and in-situ biocurrent was studied. The results showed that red soil exhibited the optimal electron transfer efficiency, as evidenced by the maximum current density and accumulated charge output, with increments of 56–93 % and 80–2800 %, respectively, compared with the other five types of soils. Soil physicochemical properties were the most important factor on the biocurrent generation, and further the quantity and bioavailability of dissolved organic matter, NH4+-N content, and lower pH were predictive indicators for the exoelectrogenic processes of soils. In addition, the high soil biocurrent was likely determined by a complex synergistic network of the transformation of carbon and nitrogen, electroactive bacteria involving the functions of cell wall/membrane and cytochrome enzyme metabolism and transport related EET process. Overall, we provide an insight into the relationship among soil biocurrent conduction, physicochemical properties, bacteria community and metabolic function, and a support for bioelectrochemical technology application.

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