室内环境二氧化硫对表面细菌群落的破坏
Wing Lam Chan1, Yin Hau Lam1, Zhancong Liang1
1School of Energy and Environment, City University of Hong Kong, Hong Kong SAR, China.
Environmental science & technology
|December 4, 2025
概括
室内二氧化硫 (SO2) 在典型水平影响室内细菌. 即使是低度也显著降低了细菌的生存能力,并改变了表面上的微生物群落,特别是在干燥,缺乏营养的条件下.
科学领域:
- 环境微生物学 环境微生物学
- 空气质量研究 空气质量研究
- 微生物生态学 微生物生态学
背景情况:
- 室内二氧化硫 (SO2) 是一个普遍存在的空气污染物.
- 在典型的室内度下 (≤100 ppb) 对表面相关细菌的影响尚不清楚.
- 以前的研究集中在高消毒剂度 (≥100 ppm) 上.
研究的目的:
- 研究室内SO2对细菌活力,生物膜形成和社区组成的影响.
- 探索不同营养水平和相对湿度 (RH) 的这些影响.
- 为了区分控制的实验室条件和现实世界的表面之间的反应.
主要方法:
- 使用大肠杆菌 (Escherichia coli) 的控制室实验.
- 在不同的RH (20%-97%) 和营养条件下,暴露于不同SO2度 (≤100ppb) 的情况.
- 对真实世界厨房表面上的细菌群体的分析.
主要成果:
- 杀菌作用在低营养,低RH (20%) 和低细胞密度条件下的松散粘附细菌中最为明显.
- ≥30 ppb SO2 在低细胞密度和营养水平下显著降低了RH水平的生存能力.
- 生物膜抑制需要更高的SO2度 (100ppb).
- 厨房表面的细菌数量在表面下降了30ppb,在≤60%的RH下,在非表面下降了≥10ppb.
- SO2降低了细菌多样性和改变了30ppb的社区组成,无论表面类型或RH.
结论:
- 室内典型水平的环境SO2对室内表面微生物群落有着显著的,未被认可的影响.
- 细菌活力和社区结构对SO2敏感,特别是在特定的环境条件下.
- 这些发现强调了室内环境中低水平的SO2暴露的生态相关性.
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