不同水平的PFOS对有氧颗粒污泥的压力:对性能,AGS结构,社区继承和微生物相互作用反应的见解
Kening Wang1, Yan Huang1, Minglu Zhang2
1Beijing Engineering Research Center of Environmental Material for Water Purification, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
The Science of the total environment
|October 11, 2023
概括
暴露在 perfluorooctane 硫酸 (PFOS) 中会通过减少污染物去除和改变微生物相互作用来损害有氧颗粒污泥 (AGS). 稀有物种在PFOS压力下对系统稳定至关重要.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 环境工程 环境工程
背景情况:
- perfluorooctane sulfonic acid (PFOS) 具有环境风险,但其对有氧颗粒污泥 (AGS) 微生物群落的影响尚不清楚.
- 调查AGS对PFOS的反应对于了解废水处理效率至关重要.
研究的目的:
- 调查PFOS对AGS粒子结构,污染物去除和微生物社区相互作用的影响.
- 为了阐明稀有微生物物种在PFOS压力下的AGS中的作用.
主要方法:
- 有氧颗粒污泥系统暴露于不同的PFOS度 (0.1和1 mg/L).
- 使用质量平衡和网络分析评估颗粒大小,污染物去除 (总,总),微生物活动 (脱,吸收/释放),细胞外聚合物 (EPS) 生产和微生物网络相互作用.
主要成果:
- PFOS的去除主要是通过吸附 (>85%).
- PFOS降低了AGS粒子大小,抑制了和的去除,并降低了微生物的活动.
- PFOS增加了EPS (特别是蛋白质) 产量,降低了颗粒的疏水性,改变了微生物相互作用,增加了竞争并减缓了信息传输.
- 罕见的微生物物种在社区信息交换中发挥了重要作用,并充当种子库,在PFOS压力下转化为关键物种.
结论:
- 通过破坏微生物社区的结构和功能,PFOS会对AGS的性能产生负面影响.
- 稀有微生物物种对于AGS在环境压力下的弹性和稳定至关重要.
- 了解这些微生物动态是管理废水处理中的PFOS污染的关键.
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