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生物膜诱导的微塑料和微生物代谢物从饮用水分配系统中的聚烯随机管道释放

Jianing Xiu¹, Bing Geng², Mingkun Liu²

¹State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China.

|September 20, 2025

概括

塑料管道上的生物膜生长加速了材料的老化,并将有害化学物质释放到饮用水中. 这项研究揭示了微塑料和污染物释放的增加,这给水质带来了重大风险.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
微生物学微生物学

背景情况:

塑料管道,如聚烯随机共聚物 (PPR),在饮用水分配系统 (DWDS) 中很常见.
长期使用可能导致生物膜形成,改变管道材料并释放污染物.
生物膜诱导降解和相关风险的机制和程度尚未完全理解.

研究的目的:

为了研究PPR管道中生物膜介导的腐蚀.
量化微塑料 (MP) 和微生物代谢物释放量.
评估对饮用水安全的影响.

主要方法:

高分辨率扫描电子显微镜 (SEM) 用于表面分析.
流细胞计和16S rRNA测序用于微生物社区分析.
气色谱-质谱 (GC-MS) 用于代谢物识别和量化.

主要成果:

生物膜殖民导致了逐渐的PPR管道恶化:增加粗,微裂和孔隙.
微塑料的释放量增加了2.1倍,阻燃剂,甲酸盐和抗氧化剂的显著浸出.
鉴定出了由Sphingobium,Bradyrhizobium,Comonadaceae和Sediminibacterium主导的细菌群落,这些细菌群落与降解途径有关.

结论:

生物膜的发展通过腐蚀和生物化学降解加速了PPR管的老化.
高度释放的MP和污染物会给水质带来很大的风险.
迫切需要生物膜控制策略或改善DWDS中的管道材料.

关键词:

生物膜引起的腐蚀是生物膜引起的腐蚀.微生物的代谢产物微塑料释放的微塑料可以释放.聚烯随机管道聚烯随机管水分系统的水分系统.

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