Deciphering physicochemical properties and enhanced microbial electron transfer capacity by magnetic biochar
文献类型： 外文期刊
作者： An, Tianyi 1 ; Chang, Yaofeng 1 ; Xie, Junxiang 1 ; Cao, Qianfei 1 ; Liu, Yuxue 2 ; Chen, Chongjun 1 ;
作者机构： 1.Suzhou Univ Sci & Technol, Sch Environm Sci & Engn, Suzhou 215009, Peoples R China
2.Zhejiang Acad Agr Sci, Inst Environm Resource Soil & Fertilizer, Hangzhou 310021, Peoples R China
3.Jiangsu Collaborat Innovat Ctr Technol & Mat Water, Suzhou 215009, Peoples R China
4.Xuefu Rd 99, Suzhou 215009, Peoples R China
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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