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聚乙烯纳米塑料对生物去除和微生物细胞外聚合物的影响机制

Zichen Shuai^1,2,3, Hua Zhang^1,2,3, Jinfeng Zhang^1,2,3

¹School of Environmental and Energy Engineering, Anhui Jianzhu University, Hefei, P.R. China.

Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering

|January 13, 2026

概括

聚乙烯纳米塑料 (PE-NPs) 通过破坏微生物群落和代谢过程,损害了生物去除 (BPR). 本研究量化了PE-NP对BPR效率和废水质量的影响.

科学领域:

环境科学环境科学
环境微生物学环境微生物学
水处理技术水处理技术

背景情况:

新出现的污染物如聚乙烯纳米塑料 (PE-NPs) 对废水处理过程构成风险.
生物去除 (BPR) 对于营养管理至关重要,但易受化学破坏的影响.

研究的目的:

调查PE-NP对BPR效率和机制的影响.
阐明PE-NP对微生物群落结构和BPR系统中的功能的影响.

主要方法:

BPR系统对不同度的PE-NP (0-20 mg/L) 的实验暴露.
分析了去除效率,废水化学氧气需求 (COD) 和聚酸 (PHA) 合成/消费.
细胞外聚合物物质 (EPS) 和细胞内活性氧物种 (ROS) 水平的表征.
使用高通量测序和光谱技术 (F-EEM,FTIR) 进行微生物社区分析.

主要成果:

增加PE-NP度导致的去除减少,并增加了废水COD.
PE-NPs改变了PHA代谢,减少了总EPS,并提高了细胞内ROS水平.
光谱分析显示了EPS组成和蛋白质构成的变化.
微生物社区的转移有利于糖原积聚生物 (GAO) 而不是积聚生物 (PAO),影响营养循环.

结论:

通过诱导氧化应激,改变EPS特性和转移微生物群落,PE-NP破坏了BPR.
这些影响使碳和代谢脱,导致BPR性能恶化.
了解这些影响对于管理废水处理中的纳米塑料污染至关重要.

关键词:

聚乙烯纳米塑料是一种聚乙烯纳米塑料.生物去除生物去除细胞外聚合物质 (EPS) 是一种细胞外聚合物.蛋白质二次结构蛋白质二次结构

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