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弱超声波增强了异质化-有氧化脱细菌在per-和多醇基物质应激下去除的作用

Jingshen Zhang¹, Jiahao Zhang², Mingyue Zhao³

¹Huang Huai Laboratory, Henan Academy of Sciences, Zhengzhou 450046, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.

Bioresource technology

|July 29, 2025

概括

透和多醇基物质 (PFAS),特别是 perfluorooctanoic 酸 (PFOA),破坏了废水中的生物去除. 微弱的超声波应用有效地减轻了PFOA.

科学领域:

环境微生物学环境微生物学
水处理技术水处理技术.
化学污染化学污染化学污染

背景情况:

和多基基物质 (PFAS) 是持久的环境污染物.
含有的废水处理依赖于生物去除 (BNR).
perfluorooctanoic 酸 (PFOA) 是一种常见的 PFAS,在废水中被检测到.

研究的目的:

为了研究PFOA对BNR的抑制作用,通过异质化-有氧脱细菌.
评估弱超声波在减轻PFOA对BNR的抑制作用中的有效性.

主要方法:

细菌暴露于不同度的PFOA (1 mg/L和100 mg/L).
评估去除的速度 (酸盐和氨).
转录组分析以评估与去除相关的基因表达.
在PFOA压力下使用弱超声波.
测量腺三酸酶活性和细胞外聚合物质 (EPS) 分泌.

主要成果:

酸显著降低了酸盐和氨去除率.
转录组分析显示,在PFOA压力下,去除基因的下调.
高度的PFOA诱导氧化应激和细胞膜损伤.
在1mg/L的PFOA压力下弱超声波应用增强了细菌生长,新陈代谢和EPS分泌.
超声波处理通过减轻PFOA毒性,提高了去除效率.

结论:

酸对废水中的生物除过程构成重大威胁.
弱超声波是一种可行的策略,可以抵消PFOA对BNR的有害影响.
这种方法为处理废水处理系统中PFAS污染的管理提供了一个实际的解决方案.

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