微塑料加速化,塑造微生物群落,并在化过程中改变抗生素耐药性
Yang Wang1, Peikun Yuan1, Pin Gao2
1College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
The Science of the total environment
|December 31, 2024
概括
微塑料通过促进微生物活动和丰富抗生素耐药性基因 (ARG) 来影响废水化. 可生物降解的多乳酸MP特别增加了ARG和致病细菌,造成了环境问题.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 环境化学环境化学
背景情况:
- 微塑料 (MP) 和抗生素耐药性基因 (ARG) 是废水处理厂 (WWTP) 中普遍存在的新兴污染物.
- 由于MP和ARG同时出现,人们对它们对WWTP流程和公共卫生的综合影响感到担忧.
研究的目的:
- 研究不同类型的MPs (聚乙烯,聚乙烯化物,聚乳酸) 对化性能的影响.
- 分析MPs对微生物群落和化过程中的ARG丰富的影响.
- 在化污泥和MP生物膜中识别ARG的潜在微生物宿主.
主要方法:
- 实验性研究,将化污泥暴露在各种MP (PE,PVC,PLA) 中.
- 测量化速率 (氨氧化,酸盐生产).
- 使用分子技术分析微生物群落组成.
- 通过qPCR对ARG和整合酶基因 (intI1) 的量化.
- 差异分解和网络分析,以评估MP,微生物群落和ARG之间的关系.
主要成果:
- 议员们提高了化率,增加了氨氧化和酸盐生产率.
- 在化污泥和生物膜中,MPs,特别是PLA,选择性丰富的ARG和intI1基因.
- 与PE (23.9%) 和PVC (21.4%) 相比,PLA-MPs显著增加了intI1的丰度 (51.6%).
- 微生物社区分析显示,Nitrospira和Nitrosomonas的丰富,Nitrosomonas和致病细菌被确定为潜在的ARG宿主.
结论:
- 议员可以影响WWTP中的化效率和微生物社区结构.
- MPs作为ARG的载体,可生物降解的PLA显示出对ARG丰富的明显影响.
- 研究结果强调需要考虑可生物降解的MPs对环境的影响,特别是关于ARG传播和潜在的致病性.
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