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生物固体中的PFAS:土地应用后的积累特征和命运概况

Berrin Tansel¹, Yelena Katsenovich², Natalia Soares Quinete³

¹Florida International University, Civil and Environmental Engineering Department, USA.

Journal of environmental management

|September 7, 2024

概括

在废水处理过程中,和多基物质 (PFAS) 积聚在生物固体中. 这些生物固体的土地应用可能会导致PFAS动员,因为它们的溶解度很高.

科学领域:

环境化学环境化学
水处理技术水处理技术
土壤科学土壤科学

背景情况:

生物固体的土地应用是有利于农业的实践.
污水处理厂 (WWTPs) 从各种来源接收到多和多基物质 (PFAS).
聚甲酸可以积聚在污水污泥中,形成生物固体.

研究的目的:

评估来自迈阿密-戴德水和下水道局 (MDWASD) 的两个水处理厂的生物固体中的PFAS水平.
在污泥处理过程中评估PFAS分区和命运.
确定土地应用后从生物固体中调动PFAS的潜力.

主要方法:

在加厚,无氧消化和脱水后收集的生物固体样本.
在污泥样本上进行了为期30天的批量漏试验.
分析了40种不同的PFAS化合物的液体和固体分数.

主要成果:

在活性污泥过程中,PFAS会积聚在固体上.
污泥消化将一些PFAS释放到液态阶段.
脱水会降低生物固体中的PFAS含量,但40个PFAS中24个被检测到.
在接收垃圾填埋污水的WWTP生物固体中发现了更高的PFAS含量.

结论:

生物固体中的大部分PFAS是高度溶解的,易于调动.
生物固体的土地应用可能导致环境PFAS污染.
了解PFAS分区对于管理生物固体至关重要.

关键词:

生物固体是一种生物固体.减少水分的使用.消化的污泥污泥.在PFAS的命运.聚和 perfluoroalkyl 物质的使用情况.污水处理污水处理污水处理

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