Synergistic effects of surfactant biostimulation and indigenous fungal bioaugmentation for enhanced bioremediation of PAH-contaminated soils

文献类型： 外文期刊

第一作者： Dai, Yeliang

作者： Dai, Yeliang;Wang, Shuang;Yang, Xiumin;Zhao, Xuan;Cheng, Xianghui;Li, Jibing;Luo, Chunling;Zhang, Gan;Dai, Yeliang;Zhao, Chunxia;Wang, Xiyu;Dai, Yeliang;Cai, Xixi;Wang, Shuang;Zhao, Xuan

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关键词： Indigenous fungal bioaugmentation; Surfactant biostimulation; Polycyclic aromatic hydrocarbons; Indigenous functional microorganism; Stable-isotope probing

期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：7.3； 五年影响因子：8.1 ）

ISSN： 0269-7491

年卷期： 2025 年 375 卷

页码：

收录情况： SCI

摘要： Surfactant biostimulation and autochthonous fungal bioaugmentation have emerged as promising strategies for the bioremediation of soils contaminated with polycyclic aromatic hydrocarbons (PAHs). However, the mechanisms driving their combined effects remain poorly understood. This study investigates the degradation mechanisms associated with bioaugmentation using the indigenous fungus Aspergillus fumigatus LJD-29 and surfactant Tween 80. By employing stable-isotope probing and high-throughput sequencing, we comprehensively assessed these processes. In our study, the results demonstrate that both Aspergillus fumigatus LJD-29 and Tween 80 significantly enhanced the degradation efficiency of phenanthrene and modified the microbial community composition, particularly among active degraders. Extracellular enzymes were identified as key players in the phenanthrene transformation process. Tween 80 improved the bioavailability of phenanthrene, stimulating the growth of native PAH degraders, with Pseudonocardia emerging as a prominent genus. Although the combined surfactant-fungal treatment did not substantially increase terminal degradation efficiency due to limitations in phenanthrene bioavailability, it accelerated the degradation rate. Additionally, Tween 80 helped restore the microbial community structure disrupted by fungal bioaugmentation. These findings provide valuable insights into the mechanisms of surfactant biostimulation and indigenous fungal bioaugmentation, highlighting the potential of this integrated bioremediation strategy for managing PAH-contaminated soils.

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