[微塑料诱导的泥颗粒潜力的变化和微生物丰富特征]
Qing-Fan Xie1, Nan Yu1, Ni Zhang1,2
1College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China.
Huan jing ke xue= Huanjing kexue
|July 12, 2023
概括
聚乙烯二甲酸微塑料 (PET-MPs) 通过增加细胞外聚合物物质 (EPS) 来加速污泥颗粒化. 然而,暴露于微塑料会损害废水处理性能和微生物多样性.
科学领域:
- 环境科学 环境科学
- 环境工程环境工程
- 微生物学 微生物学
背景情况:
- 微塑料 (MP) 是污水处理厂中的新兴污染物.
- 在废水处理中对MP的研究主要集中在污染水平和分布上,而不是它们对污泥颗粒化的影响.
- MPs对污泥颗粒化的影响仍然没有得到充分的研究.
研究的目的:
- 为了研究聚乙烯二甲微塑料 (PET-MPs) 对污泥颗粒化过程的影响.
- 分析PET-MPs对系统运行性能,细胞外聚合物物质 (EPS) 组成以及微生物社区在颗粒化过程中的丰富的影响.
主要方法:
- 使用PET-MPs进行了微塑料暴露测试.
- 分析了泥颗粒,系统运行性能,EPS成分和微生物菌群丰富度.
- 使用高通量测序来评估微生物群落的多样性和组成.
主要成果:
- PET-MPs显著加速了污泥颗粒化,颗粒化速率和EPS分泌与颗粒大小成比例.
- 增加EPS,特别是PN,增强了污泥表面的疏水性,协同促进颗粒型污泥的形成.
- 持续暴露于MP会降低除污染性能,抑制污染物降解,并导致酸的积累.
- 微生物群落的多样性减少,占主导地位的细菌类和家族的变化影响了营养去除过程.
结论:
- PET-MPs可以通过EPS生产和增加疏水性来增强污泥颗粒化.
- 然而,微塑料污染对废水处理效率和微生物社区结构产生了负面影响.
- 需要进一步的研究来了解和减轻微塑料在废水处理系统中的不利影响.
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