水成膜泡沫(AFFF)改良土壤微生态系统中 15 类全氟化烷基和多氟化烷基物质的命运与转化

IF 10.8 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL
Sheng Dong, Peng-Fei Yan, Katherine E. Manz, Linda M. Abriola, Kurt D. Pennell, Natalie L. Cápiro
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引用次数: 0

摘要

水成膜泡沫(afff)中的全氟烷基和多氟烷基物质(PFAS)的环境命运,特别是那些通过电化学氟化(ECF)工艺合成的物质,在很大程度上仍然未知。本研究评估了经历史上使用的AFFF配方(3M Light WaterTM)修正的好氧土壤微生物中AFFF衍生的ECF-based前体的转化。在308天的培养过程中,通过可疑筛选/非靶向分析(SSA/NTA)鉴定或初步鉴定了15类PFAS,包括AFFF成分和转化产物。该研究表明,afff衍生的基于ecf的前体是全氟烷烃磺酰胺(FASAs)和全氟烷基酸(PFAAs)的来源,这些物质通常在afff影响的部位检测到。时间采样提供了多种前体生物转化的证据,包括三甲基或二甲基氨丙基全氟烷烃磺酰胺。此外,发现以ecf为基础的前体的环境稳定性(即抗转化性)取决于结构特征,包括全氟烷基链长、磺酰胺或羧酰胺基团的存在以及附着在氮原子上的官能团(例如,羧基烷基的一个分支)。这些发现为afff衍生的PFAS和其他结构类似的基于ecf的PFAS的转化途径提供了见解,这将支持在遗留afff影响的地点管理和修复PFAS污染。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Fate and Transformation of 15 Classes of Per- and Polyfluoroalkyl Substances in Aqueous Film-Forming Foam (AFFF)-Amended Soil Microcosms

Fate and Transformation of 15 Classes of Per- and Polyfluoroalkyl Substances in Aqueous Film-Forming Foam (AFFF)-Amended Soil Microcosms
The environmental fate of per- and polyfluoroalkyl substances (PFAS) in aqueous film-forming foams (AFFFs), especially those synthesized by electrochemical fluorination (ECF) processes, remains largely unknown. This study evaluated the transformation of AFFF-derived ECF-based precursors in aerobic soil microcosms amended with a historically used AFFF formulation (3M Light WaterTM). Fifteen classes of PFAS, including AFFF components and transformation products, were identified or tentatively identified by suspect screening/nontargeted analysis (SSA/NTA) throughout a 308-day incubation. This study demonstrates that AFFF-derived ECF-based precursors serve as sources of perfluoroalkane sulfonamides (FASAs) and perfluoroalkyl acids (PFAAs), which are commonly detected at AFFF-impacted sites. Temporal sampling provided evidence for biotransformation of multiple precursors including tri- or dimethyl ammonio propyl perfluoroalkane sulfonamides. Additionally, the environmental stability (i.e., resistance to transformation) of ECF-based precursors was found to depend upon structural characteristics, including perfluoroalkyl chain length, presence of sulfonamide or carboxamide groups, and functional groups (e.g., a branch of carboxyalkyl group) attached to the nitrogen atoms. These findings provide insights into the transformation pathways of AFFF-derived PFAS and other structurally similar ECF-based PFAS, which will support the management and remediation of PFAS contamination at legacy AFFF-impacted sites.
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来源期刊
环境科学与技术
环境科学与技术 环境科学-工程:环境
CiteScore
17.50
自引率
9.60%
发文量
12359
审稿时长
2.8 months
期刊介绍: Environmental Science & Technology (ES&T) is a co-sponsored academic and technical magazine by the Hubei Provincial Environmental Protection Bureau and the Hubei Provincial Academy of Environmental Sciences. Environmental Science & Technology (ES&T) holds the status of Chinese core journals, scientific papers source journals of China, Chinese Science Citation Database source journals, and Chinese Academic Journal Comprehensive Evaluation Database source journals. This publication focuses on the academic field of environmental protection, featuring articles related to environmental protection and technical advancements.
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