通过Fe/Mn纳米颗粒促进使用Comamonas testosteroni去除Bisphenol A的调节机制的新理解
Chao Xue1, Xiaonan Cai1, Ronghao Wu1
1School of Environmental and Resource Sciences, Fujian Normal University, Fujian Key Laboratory of Pollution Control and Resource Reuse, Fuzhou, Fujian Province 350117, PR China.
Journal of hazardous materials
|August 15, 2024
概括
绿色合成的铁/纳米粒子 (Fe/Mn NPs) 通过促进细菌生长和代谢活动,显著增强了BPA的去除. 这种纳米技术为高效的双A降解提供了一个有前途的解决方案.
科学领域:
- 环境科学 环境科学
- 纳米技术 纳米技术
- 微生物学 微生物学
背景情况:
- 双A (BPA) 是一种广泛存在的环境污染物,需要有效的整治策略.
- 降解红素的细菌,如Comamonas testosteroni FJ17,显示了BPA降解的潜力.
- 正在探索外源性促进剂以提高微生物降解效率.
研究的目的:
- 研究绿色合成的铁/纳米粒子 (Fe/Mn NPs) 作为康马莫纳斯丸子FJ17的促进剂的作用.
- 评估暴露于Fe/MnNP的细菌对双A (BPA) 的提升去除效率.
- 阐明Fe/Mn NP促进细菌活动和BPA降解的潜在机制.
主要方法:
- 进行了批量实验,以评估带有和没有Fe/Mn NP的BPA去除效率.
- 传输电子显微镜 (TEM) 和3D激发发射矩阵 (3D-EEM) 分析被用来研究细胞变化.
- 进行了电子转移能力,乳糖酶活性,LC-MS,毒性评估和转录组分析的分析.
主要成果:
- 在48小时后,Fe/Mn NPs暴露使BPA去除效率提高了20.9% (从72.70%到93.63%).
- Fe/Mn NPs促进了细菌细胞膜的加厚和细胞外聚合物质 (TB-EPS) 的分泌,增强了电子转移和乳酶活性.
- 转录组分析揭示了参与能源供应,营养物质运输和代谢途径的基因的显著上调,加速了细菌的增殖和BPA降解.
结论:
- 绿色合成的Fe/MnNP有效地作为外源性促进剂,显著增强由Comamonas testosteroni FJ17通过BPA去除的作用.
- Fe/Mn NPs提高了细菌的代谢能力,营养物质的运输和细胞结构,从而加速了BPA的降解和降低了副产品的毒性.
- 这项研究突出了Fe/Mn NP在开发用于持久有机污染物的先进生物修复技术方面的潜力.
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