废水处理性能和细菌群体对原始和老化聚乙烯微塑料的反应,用于批量反应堆的测序
Menglong Li1, Yizhen Cao1, Xiaojing Yang1
1Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Chemical Engineering, Ocean and Life Sciences, Dalian University of Technology, Panjin 124221, China.
Bioresource technology
|January 8, 2025
概括
微塑料 (MPs) 通过抑制污染物去除和改变细菌群落,对废水处理产生负面影响. 老年国会议员带来更大的风险,影响污泥度和代谢基因.
科学领域:
- 环境科学 环境科学
- 环境化学环境化学
- 微生物学 微生物学
背景情况:
- 微塑料 (MP) 是广泛存在的环境污染物,经常在废水中检测到.
- 废水处理厂 (WWTP) 是MP命运和运输的关键接口.
- 老化过程显著改变了MP的特性,可能会影响其对环境的影响.
研究的目的:
- 调查原始和老化的聚乙烯 (PVC) MPs 对WWTP性能的影响.
- 分析PVC MPs对废水细菌群落和代谢的影响.
- 了解MP老化如何影响其与生物处理过程的相互作用.
主要方法:
- 芬顿老化用于修改PVCMP,改变其表面和化学特性.
- 该研究评估了原始和老化的PVC MPs对化学氧气需求 (COD) 和氨- (NH4+-N) 除去的影响.
- 分析了细菌社区结构,细胞外聚合物质 (EPS) 生产和代谢基因丰度.
主要成果:
- 芬顿老化使PVC MP表面变粗,并改变了它们的化学特性.
- 原始和老化PVCMP都降低了COD和NH4+-N的去除效率,降低了污泥度.
- PVC MPs增加了松散结合的EPS,降低了紧密结合的EPS蛋白质含量,并转移了细菌群落,有利于EPS生产者而不是去除的生产者.
结论:
- 聚乙烯 (PVC) 的MP,尤其是老式的MP,大大降低了废水处理效率.
- PVC MPs的存在会破坏微生物群落的结构和功能,影响去除.
- 调查结果强调,需要在对WWTP的环境风险评估中考虑老年议员.
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