Stability and Biotransformation of 6:2 Fluorotelomer Sulfonic Acid, Sulfonamide Amine Oxide, and Sulfonamide Alkylbetaine in Aerobic Sludge,Environmental Science & Technology

当前位置： X-MOL 学术 › Environ. Sci. Technol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Stability and Biotransformation of 6:2 Fluorotelomer Sulfonic Acid, Sulfonamide Amine Oxide, and Sulfonamide Alkylbetaine in Aerobic Sludge
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2024-01-04 , DOI: 10.1021/acs.est.3c05506
Bo Fang ₁ , Yaozhi Zhang ₁ , Hao Chen ₁ , Biting Qiao ₁ , Hao Yu ₁ , Maosen Zhao ₁ , Meng Gao ₁ , Xiaoxiao Li ₁ , Yiming Yao ₁ , Lingyan Zhu ₁ , Hongwen Sun ₁

Affiliation

The 6:2 fluorotelomer sulfonamide (6:2 FTSAm)-based compounds signify a prominent group of per- and polyfluoroalkyl substances (PFAS) widely used in contemporary aqueous film-forming foam (AFFF) formulations. Despite their widespread presence, the biotransformation behavior of these compounds in wastewater treatment plants remains uncertain. This study investigated the biotransformation of 6:2 FTSAm-based amine oxide (6:2 FTNO), alkylbetaine (6:2 FTAB), and 6:2 fluorotelomer sulfonic acid (6:2 FTSA) in aerobic sludge over a 100-day incubation period. The biotransformation of 6:2 fluorotelomer sulfonamide alkylamine (6:2 FTAA), a primary intermediate product of 6:2 FTNO, was indirectly assessed. Their stability was ranked based on the estimated half-lives (t_1/2): 6:2 FTAB (no obvious products were detected) ≫ 6:2 FTSA (t_1/2 ≈28.8 days) > 6:2 FTAA (t_1/2 ≈11.5 days) > 6:2 FTNO (t_1/2 ≈1.2 days). Seven transformation products of 6:2 FTSA and 15 products of 6:2 FTNO were identified through nontarget and suspect screening using high-resolution mass spectrometry. The transformation pathways of 6:2 FTNO and 6:2 FTSA in aerobic sludge were proposed. Interestingly, 6:2 FTSAm was hardly hydrolyzed to 6:2 FTSA and further biotransformed to perfluoroalkyl carboxylic acids (PFCAs). Furthermore, the novel pathways for the generation of perfluoroheptanoic acid (PFHpA) from 6:2 FTSA were revealed.

中文翻译：

6:2 氟调聚物磺酸、磺酰胺氧化胺和磺酰胺烷基甜菜碱在好氧污泥中的稳定性和生物转化

6:2 氟调聚物磺酰胺 (6:2 FTSAm) 基化合物是广泛用于当代水性成膜泡沫 (AFFF) 配方中的一类突出的全氟烷基物质和多氟烷基物质 (PFAS)。尽管它们广泛存在，但这些化合物在废水处理厂中的生物转化行为仍然不确定。本研究调查了 6:2 FTSAm 基氧化胺 (6:2 FTNO)、烷基甜菜碱 (6:2 FTAB) 和 6:2 氟调聚物磺酸 (6:2 FTSA) 在好氧污泥中 100 天的生物转化情况潜伏期。间接评估了 6:2 氟调聚物磺酰胺烷基胺 (6:2 FTAA)（6:2 FTNO 的主要中间产物）的生物转化。根据估计的半衰期 ( t _1/2 ) 对它们的稳定性进行排名： 6:2 FTAB（未检测到明显产物）≫ 6:2 FTSA ( t _1/2 ≈28.8 天) > 6:2 FTAA ( t _1/2 ≈11.5 天）> 6:2 FTNO（ t _1/2 ≈1.2 天）。使用高分辨率质谱法通过非目标和可疑筛选鉴定了 7 个 6:2 FTSA 转化产物和 15 个 6:2 FTNO 产物。提出了6:2 FTNO和6:2 FTSA在好氧污泥中的转化途径。有趣的是，6:2 FTSAm 几乎不会水解为 6:2 FTSA，并进一步生物转化为全氟烷基羧酸 (PFCA)。此外，还揭示了从 6:2 FTSA 生成全氟庚酸 (PFHpA) 的新途径。

更新日期：2024-01-04

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南