与废水相关的塑料球:微生物病原体的隐藏息地?
Ingun Lund Witsø1, Adelle Basson1, Marina Aspholm1
1Faculty of Veterinary Medicine, Food Safety Unit, Norwegian University of Life Sciences, Ås, Norway.
PloS one
|November 6, 2024
概括
废水中的微塑料含有诸如大肠杆菌和诺罗病毒等病原体,对人类健康和水的再利用构成风险. 有效的废水处理和塑料废物管理对于公众健康和环境安全至关重要.
科学领域:
- 环境微生物学环境微生物学
- 公共卫生 公共卫生
- 水的质量 水的质量
背景情况:
- 污水处理厂 (WWTP) 是微塑料的来源,这些微塑料形成称为塑球的生物膜.
- 塑球可能藏和传播人类病原体,造成健康风险.
- 塑料球在病原体传播中的作用需要进一步研究.
研究的目的:
- 为了识别食物传播的病原体,并在废水塑圈内表征微生物群落.
- 评估废水处理过程中微塑料上的病原体生存率.
- 了解废水环境和塑料类型如何影响塑料圈的组成.
主要方法:
- 在原始和经过处理的废水中对聚烯,PVC和HDPE上的塑料球进行分析.
- 使用培养,定量逆转录PCR (RT‒qPCR) 和16S rRNA amplicon测序.
- 研究了细菌和病毒病原体,以及微生物社区的多样性.
主要成果:
- 通过RT‒qPCR检测到由食物传播的病原体 (Listeria monocytogenes,大肠杆菌,诺罗病毒,腺病毒).
- 活性的克莱布西拉肺炎菌和阿辛托巴克特菌 spp. 在原始和经过处理的废水中的塑料球中发现.
- 废水环境和暴露时间对塑层的多样性和组成产生了重大影响;塑料类型的影响较小.
结论:
- 废水塑料球可以容纳和传播致病微生物,挑战水的再利用.
- 病原性细菌可能会在这些生物膜中存活下来废水处理.
- 改善微塑料的清除和废物管理对于减轻塑料相关病原体对公众健康的风险至关重要.
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