解读纳米过中微/纳米塑料诱导的膜生物污染:超基因组洞察力和空间驱动的缓解
Xinhui Liu1, Yu Yang1, Nigel J D Graham2
1School of Environment, Beijing Normal University, Beijing, 100875, China.
Water research
|April 25, 2025
概括
微/纳米塑料 (MNP) 通过改变微生物群落和代谢途径,显著恶化纳米过 (NF) 膜生物污染. 新型穿孔柱间隔器通过改善水力动力学和减少MNP沉积,有效地减轻了这种生物污染.
科学领域:
- 环境科学 环境科学
- 水处理技术 水处理技术
- 微生物学 微生物学
背景情况:
- 纳米过 (NF) 有效地去除微/纳米塑料 (MNP),但它们对NF膜生物污染的影响尚不清楚.
- 生物污染会影响污水处理中的膜性能和运行效率.
研究的目的:
- 研究MNP对NF膜生物污染的尺寸和度相关影响.
- 阐明MNP对微生物群落结构和生物膜中的代谢途径的影响.
- 评估新型穿孔柱间隔器 (PCS) 在缓解MNP诱导的生物污染方面的有效性.
主要方法:
- 研究了MNP对处理二次废水污水的NF膜的尺寸 (20 nm-25 μm) 和度依赖 (0.1-50 mg·L-1) 的影响.
- 利用元基因组分析来评估微生物社区结构和代谢途径.
- 评估了膜模块中新型穿孔柱间隔器 (PCS) 的性能.
主要成果:
- MNPs增加了生物膜生物质 (19.3%-76.7%) 并加速了透流量下降,80nmNP在0.1 mg·L-1时导致最严重的生物污染.
- 确定了主要的属:Acinetobacter,Novosphingobium和Asticcacaulis,它们表现出MNP的耐受性和高代谢性.
- MNPs上调调节了外聚糖和氨酸生物合成,定数感应,并抑制了细胞运动途径.
- PCS显著增强了水力动力学,减少了压力下降,并消除了MNP沉积,减轻了生物污染.
结论:
- 在NF生物膜中,MNP显著改变了微生物群落和代谢功能,加剧了生物污染.
- 了解MNP-生物污染相互作用对于可持续的NF运营至关重要.
- 穿孔柱间隔器在二次废水过中为控制MNP生物污染提供了一个有希望的策略.
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