Biochar reversed antibiotic resistance genes spread in biodegradable microplastics and Cu co-contaminated soil by lowering Cu bio-availability and regulating denitrification process
文献类型： 外文期刊
作者： Wang, Zhenyu 1 ; Sun, Ying 3 ; Wang, Xuejiang 1 ; Xia, Siqing 1 ; Zhao, Jianfu 1 ;
作者机构： 1.Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, Peoples R China
2.Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China
3.Shanghai Acad Agr Sci, Inst Agr Sci & Technol Informat, Shanghai 201403, Peoples R China
关键词： Soil remediation; Cu immobilization; PBAT microplastics; Nitrogen conversion; ARGs propagation; 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 2 期
页码：
收录情况： SCI
摘要： This study first revealed how biochar affected antibiotic resistance genes (ARGs) development in Cucontaminated soil coexisting with biodegradable microplastics via microcosm experiments. Results indicated that biodegradable microplastics exacerbated ARGs spread in Cu-contaminated soil by increasing Cu bioavailability, which heightened selective pressure on microbes, and by accelerating the denitrification process, as denitrification genes were closely linked to ARGs. Fortunately, biochar amendment decreased the total ARGs abundance by 41.73 % in co-contaminated soil. The passivation of biochar reduced the proportion of bioavailable Cu by 5.39 %. The denitrification process was also diminished, with a 17.85 % reduction in denitrification genes copies. Additionally, biochar altered the dominant denitrifying genera in soil, shifting from ARGs hosts (e.g., Acinetobacter and Bacillus) to non-hosts (Comamonas). Overall, these findings suggested that biochar adoption could promote Cu immobilization and regulate soil denitrification process, making it an effective strategy to mitigate the ARGs transmission in biodegradable microplastics and Cu co-contaminated soil.
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