文献类型： 外文期刊
第一作者： An, Tianyi
作者： An, Tianyi;Liu, Yang;Chang, Yaofeng;Tang, Kai;Chen, Chongjun;Xie, Junxiang;Xie, Jiawei;Liu, Yuxue;Chen, Chongjun
作者机构：
关键词： Anammox; Cu 2+ inhibition; Magnetic biochar; Electron transfer capacity; Microbial community
期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 影响因子：7.2； 五年影响因子：7.6 ）
ISSN： 2213-2929
年卷期： 2025 年 13 卷 5 期
页码：
收录情况： SCI
摘要： This research investigated the role of magnetic biochar (FCS) in alleviating Cu2+ inhibition and modulating electron transfer capacity in anaerobic ammonium oxidation (anammox). Results showed that FCS significantly mitigated Cu2+ toxicity, maintaining higher total nitrogen removal efficiency (TNRE: 59.2 % at 12.0 mg/L Cu2+) compared to pyrolytic biochar (CS: 50.6 %) and control blank (CK: 47.4 %). FCS enhanced extracellular polymeric substance (EPS) production, particularly proteins (PN), which acted as a protective barrier against Cu2+ stress. Heme c levels in FCS reactors remained higher under Cu2+ stress, supporting Anammox bacteria (AnAOB) activity. Microbial analysis revealed FCS enriched Planctomycetes and fostered mutualistic interactions among Proteobacteria, Bacteroidetes, and Chloroflexi, enabling multi-pathway nitrogen removal. FCS also facilitated direct interspecies electron transfer (DIET) and stabilized microbial networks under Cu2+ stress. These findings highlight FCS as a promising strategy for enhancing Anammox resilience in Cu2+-contaminated wastewater.
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