Efficient inactivation of antibiotic resistant bacteria by iron-modified biochar and persulfate system: Potential for controlling antimicrobial resistance spread and mechanism insights
文献类型： 外文期刊
作者： Duan, Ran 1 ; Ma, Shuanglong 1 ; Ma, Yanbing 1 ; Xu, Shengjun 3 ; Li, Guangxin 1 ; Fu, Haichao 1 ; Wu, Xujin 2 ; Du, Jinge 4 ; Zhao, Peng 1 ;
作者机构： 1.Henan Agr Univ, Coll Resources & Environm, Key Lab Soil Pollut Control & Remediat Henan Prov, Zhengzhou 450002, Peoples R China
2.Henan Acad Agr Sci, Inst Qual & Safety Agroprod, Henan Key Lab Qual & Safety & Proc Agroprod, Zhengzhou 450002, Peoples R China
3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, 18 Shuangqing Rd, Beijing 100085, Peoples R China
4.Xinxiang Med Univ, Sch Publ Hlth, Xinxiang 453003, Peoples R China
关键词： Iron-modified biochar; Persulfate-based advanced oxidation processes; Antibiotic resistant bacteria inactivation; Inhibition mechanism
期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：11.3； 五年影响因子：12.4 ）
ISSN： 0304-3894
年卷期： 2025 年 492 卷
页码：
收录情况： SCI
摘要： Antimicrobial resistance (AMR) is a critical global health threat, further intensified by the widespread dissemination of plasmid-encoded antibiotic resistance genes (ARGs), which poses a significant challenge to the "One Health" concept. Persulfate-based advanced oxidation processes (PS-AOPs) have emerged as effective disinfection methods, capable of degrading antibiotics, inactivating bacteria, and eliminating ARGs, whereas their efficacy towards blocking ARGs horizontal transfer remains elusive. This work constructed a series of Fe-modified soybean straw biochar (FeSSB) as persulfate (PS) activators through Fe-modification and temperature regulation. Among the tested systems, FeSSB800/PS achieved complete inactivation of antibiotic resistant bacteria (ARB) with a 7.04-log reduction within 60 min, outperforming others. FeSSB800, featuring the highest exposed-Fe(II) sites, most C--O groups, and lowest charge transfer resistance, obtaining optimal PS activation and reactive species generation, which caused irreversible damage to ARB cells and significantly inhibited the transformation and conjugation efficiency of plasmid RP4. The inhibition mechanism is driven by the aggressive action of free radicals, which injure cell envelopes, induce oxidative stress, disrupt ATP synthesis, and alter intercellular adhesion. These findings underscore the potential of PS-AOPs as a promising strategy to mitigate AMR by simultaneously inactivating ARB and impeding ARGs dissemination.
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