对轮胎添加剂对活性污泥系统的影响的洞察:处理性能,细胞外聚合物质和微生物社区
Hao Han1, Shuailing Wang1, Lele Zhou1
1School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China.
Bioresource technology
|January 22, 2026
概括
轮胎添加剂,特别是 (MIX) 和6PPD-Q的混合物,通过减少去除和改变微生物群落,损害了废水处理. 这些污染物会导致氧化应激和酶干扰,影响系统的整体性能.
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:
- 轮胎添加剂 (TA) 是常见的环境污染物.
- 它们对对废水处理至关重要的活性污泥系统的影响尚未完全理解.
研究的目的:
- 研究常见的TA及其衍生物对活性污泥性能和微生物生态的影响.
- 阐明在环境相关度下观察到的影响背后的机制.
主要方法:
- 在160天的时间里,对7个TA及其衍生物在活性污泥上的系统研究.
- 使用3D光技术分析了去除效率,微生物基因丰度 (amoA,nirK,nirS,nosZ),氧化应激标记物 (ROS,LDH,ATP),污泥特性 (沉降性,MLVSS,水性),微生物群落结构和细胞外聚合物质 (EPS) 的分析.
- 分子对接,以评估6PPD-Q与关键酶的结合亲和力.
主要成果:
- 一种TA (MIX) 和6PPD-Q的混合物在20.0μg/L时显著抑制了去除 (NH4+-N减少12-14%,总减少18-23%).
- 这些化合物诱导了氧化应激,抑制了ATP合成,并恶化了污泥沉积能力.
- 微生物群落发生了转变,有利于耐受性属和减少关键的去除的细菌,与减少的EPS蛋白质含量和6PPD-Q的酶结合有关.
结论:
- 即使在环境度下,MIX和6PPD-Q也对活性污泥系统构成重大风险.
- 观察到的影响是由氧化应激,破坏微生物循环和潜在的酶干扰介导的.
- 调查结果为评估废水处理中的轮胎污染物的生态风险提供了关键数据.
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