New perspectives on the removal of 17β-Estradiol using biochar-immobilized microbial agents: Driving role of quorum sensing in abundant species

文献类型： 外文期刊

第一作者： Liu, Jiaxin

作者： Liu, Jiaxin;Dai, Jingtong;Yan, Chaoqun;Zhang, Shulin;Li, Yanglong;Liu, Huakang;Xu, Heng;Ouyang, Yuyuan;Wang, Keke

作者机构：

关键词： 17 beta-Estradiol-contaminated soil; Microbial immobilization on biochar; Bioremediation mechanism; Microbial co-occurrence network; Microbial assembly

期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：13.2； 五年影响因子：13.5 ）

ISSN： 1385-8947

年卷期： 2025 年 519 卷

页码：

收录情况： SCI

摘要： Due to its environmental persistence, propensity for soil accumulation, and potent endocrine-disrupting effects, 17(3-estradiol (E2) has emerged as a pervasive global contaminant, critically endangering ecosystems and human health. This study evaluated the E2 degradation efficiency and underlying mechanisms under biocharimmobilized Rhodococcus sp. HD1 in E2-contaminated soil. After 20 days, the biochar-immobilized Rhodococcus sp. HD1 showed an excellent E2 degradation capacity of 98.8%. Meanwhile, this treatment markedly affected the soil microbial ecological network, reducing network size (average path length: 4.449) and modularity (modularity: 0.467) while enhancing its complexity and connectivity (nodes: 645, edges: 12063), thus significantly influencing the community composition of abundant and rare species. Stochastic processes primarily influenced the assembly of rare species (dispersal limitation: 100%), while deterministic processes mainly mediated the assembly of abundant species (heterogeneous selection: 83%). Furthermore, quorum sensing (QS) functioned as a key factor that enhanced the regulatory role of abundant species on the activity of oxidoreductases, such as polyphenol oxidase and dehydrogenase, by modulating signal transduction systems and organic matter degradation pathways, thus facilitating E2 degradation. This study provided novel insights into the mechanisms underlying E2 bioremediation and offered a theoretical framework for managing E2 contamination in soil ecosystems.

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