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微塑料扰乱了生物膜系统中的去除,微生物群落和代谢机制

Tong Wu¹, Le Zhong¹, Jie Ding¹

¹State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.

Journal of hazardous materials

|July 6, 2023

概括

像聚钢和聚乙烯四甲酸盐这样的微塑料在生物膜系统中略有减少了总去除. 这些微塑料还会损害微生物细胞并改变代谢途径.

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:

微塑料 (MP) 是普遍存在的全球污染物,引发了人们对其对废水处理过程的影响的担忧.
在生物膜系统中,MPs对营养物质的去除和微生物代谢的影响仍然不太清楚.

研究的目的:

调查聚钢 (PS) 和聚乙烯四甲酸盐 (PET) 微塑料对生物膜系统性能的影响.
评估PS和PET对营养除去,微生物细胞完整性和转化代谢的影响.

主要方法:

生物膜系统暴露在不同度的PS和PET微塑料中.
监测了营养物质的去除 (氨,总,,化学氧气需求).
通过活性氧物种和乳酸脱酶水平评估微生物细胞损伤.
用转基因组分析来评估微生物结构和基因功能的变化.

主要成果:

100和1000μg/L的PS和PET对氨,和COD去除的影响最小.
在PS和PET的存在下,总去除减少了7.40-16.6%.
观察到显著的细胞和膜损伤,反应性氧物种和乳酸脱酶显著增加.
甲基因组分析揭示了微生物社区结构和功能的改变,其中关键的转换基因被抑制.

结论:

聚氨酸和聚乙烯四甲酸微塑料可以降低生物膜系统中总去除的效率.
微塑料诱导细胞损伤,并破坏关键的微生物途径,参与转化.
这项研究强调了微塑料污染对废水处理生物膜系统稳定性和性能的潜在风险.

关键词:

生物膜系统的生物膜系统.功能性基因是指功能性的基因.代谢过程中的代谢.微塑料是一种微塑料.的转换的转换.

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