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在聚烯微塑料的急性抑制下,有氧颗粒污泥的反应:活性,聚合性能和微生物分析

Yushuang Gan¹, Bingrou Gong¹, Xiaohua Huang¹

¹College of Environment and Ecology, Chongqing University, Chongqing, 400045, China.

Environmental pollution (Barking, Essex : 1987)

|April 5, 2024

概括

聚烯微塑料 (PS-MPs) 通过减少去除和聚合,损害有氧颗粒污泥 (AGS). 虽然高度显示一些缓解,PS-MPs破坏微生物功能和损害AGS细胞.

科学领域:

环境科学环境科学
微生物学微生物学
废水处理废水处理

背景情况:

有氧颗粒污泥 (AGS) 对于高效的废水处理至关重要.
微塑料污染,特别是聚烯微塑料 (PS-MPs),对水生生态系统构成越来越大的威胁.
对于PS-MPs对AGS性能和微生物群落的影响尚未完全理解.

研究的目的:

研究急性聚乙烯微塑料 (PS-MP) 抑制对AGS活性,聚合,微生物群落和功能性蛋白质的影响.
确定PS-MPs对去除速率和关键酶活动的剂量依赖性抑制作用.
评估PS-MPs对AGS细胞完整性,细胞外聚合物质 (EPS) 和表面特性的影响.

主要方法:

暴露于不同度的PS-MPs (0-200 mg/L) 的AGS.
测量特定的去除速率,酶活性 (亚酸减少酶,亚酸减少酶),活性氧物种 (ROS) 和乳酸脱酶 (LDH).
对AGS的细胞外聚合物 (EPS) 含量,泽塔潜力,疏水性和表面热力学进行分析.

主要成果:

通过增加PS-MP度,消除的速率和酶活动受到抑制,分别在100 mg/L和50 mg/L时观察到显著效应.
增加的ROS和LDH水平表明PS-MP诱导的细胞损伤.
EPS含量,特别是多糖类,下降,AGS聚合受到负面影响.
微生物社区分析显示,抑制了去除的细菌,增强了细胞代谢和修复功能.

结论:

急性PS-MP暴露会对AGS的去除效率和聚合性能产生不利影响.
PS-MPs 破坏了 AGS 微生物社区的结构和功能,导致细胞损伤和改变了 EPS 组成.
这些发现为在微塑料污染下运行AGS反应堆提供了关键的理论支持.

关键词:

剧烈的抑制是急性抑制.有氧颗粒污泥的有氧颗粒污泥功能性蛋白质是一种功能性蛋白质.聚乙烯微塑料的微塑料.

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