Deciphering physicochemical properties and enhanced microbial electron transfer capacity by magnetic biochar

文献类型： 外文期刊

第一作者： An, Tianyi

作者： An, Tianyi;Chang, Yaofeng;Xie, Junxiang;Cao, Qianfei;Chen, Chongjun;Liu, Yuxue;Chen, Chongjun;Chen, Chongjun

作者机构：

关键词： Biochar; Magnetization; Sludge; Electron transfer capacity; Microbial community

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：11.889； 五年影响因子：11.139 ）

ISSN： 0960-8524

年卷期： 2022 年 363 卷

页码：

收录情况： SCI

摘要： Magnetic biochar is important for improving the electron transfer capacity (ETC) of microorganisms in waste-water treatment. In this study, three magnetic biochar under different pyrolysis temperatures (300, 500 and 700 ?) were prepared by co-precipitation, and their characteristics and impacts on mediating microbial ETC were investigated. Results indicated that magnetic biochar had a higher capacitance and conductivity than pyrolytic biochar, with the largest specific capacitance of 14.7F/g for FCS700 (magnetic biochar prepared at 700 ?). The addition of magnetic biochar could improve the nitrogen removal efficiency of a sludge-biochar system. The electron transfer resistance (Rct) of magnetic biochar was lower than pyrolytic biochar by 25.5 % (300 ?), 19.7 % (500 ?), and 11.6 % (700 ?), respectively. The structure of the microbial community in the sludge-biochar system differed significantly. Spearman correlation suggested that the electrochemical properties of biochar were an important factor affecting the structure of the microbial community.

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