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纳米气泡促进多环芳的微生物降解:增强排毒和优化降解途径

Jia Jie Zou¹, Chaomeng Dai², Jiajun Hu³

¹College of Civil Engineering, Tongji University, Shanghai, 200092, China; Shanghai Key Laboratory of Bio-Energy Crops, School of Life Sciences, Shanghai University, Shanghai, 200444, China.

Environmental research

|July 20, 2025

概括

纳米气泡通过克服微生物毒性,增强了多环芳 (PAH) 的生物降解. 这种环保策略促进了液体和土壤系统中的PAH降解,提供了具有成本效益的整治解决方案.

科学领域:

环境科学环境科学
生物技术是生物技术.
环境化学环境化学

背景情况:

多环芳 (PAH) 是持久性污染物,具有重大环境和健康风险.
微生物对PAHs的修复通常受到其固有的生物毒性所阻碍.
制定有效的策略来加强PAH生物降解对于环境保护至关重要.

研究的目的:

研究纳米气泡在增强PAHs生物降解方面的有效性.
阐明纳米泡减轻PAH毒性并改善微生物降解的机制.
评估纳米气泡在溶液阶段和土壤阶段修复系统中的性能.

主要方法:

在液体和土壤系统中进行了实验,使用了五种典型的PAHs (pyrene,antracene,phenanthrene,fluoranthene,benzo[a]pyrene).
纳米气泡被引入以评估它们对PAH降解率和微生物反应的影响.
进行了微生物表征,细胞外聚合物质 (EPS) 分泌,抗氧化剂生产和土壤基因组分析.

主要成果:

纳米气泡在液体系统中增加了32.3%-111.5%的PAH降解率,并在土壤系统中实现了81%的烯降解 (增加了108%).
纳米泡保留了细胞完整性,调节了跨膜运输,并刺激了排毒物质分泌,增强了微生物代谢过程.
土壤转基因组学揭示了PAH降解的功能基因增加,特别是最小步骤途径,并使细菌的数量增加了一倍.

结论:

纳米气泡是一种普遍有效的增强器,可以在不同的环境矩阵中促进PAH生物降解.
纳米气泡促进微生物排毒,并优化代谢途径,以有效降解PAH.
这项技术为污染土壤的修复提供了一个有前途的,环保和成本效益的生物增量策略.

关键词:

抗毒性机制抗毒性机制生物修复是一种生物修复.降解途径的降解途径这些是纳米泡.多环芳香碳化合物多环芳香碳化合物

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