Biotransformation of AFFF Component 6:2 Fluorotelomer Thioether Amido Sulfonate Generates 6:2 Fluorotelomer Thioether Carboxylate under Sulfate-Reducing Conditions
Abstract
The fate of per- and polyfluoroalkyl substances (PFASs) in aqueous film-forming foams (AFFFs) under anaerobic conditions has not been well characterized, leaving major gaps in our understanding of PFAS fate and transformation at contaminated sites. In this study, the biotransformation of 6:2 fluorotelomer thioether amido sulfonate (6:2 FtTAoS), a component of several AFFF formulations, was investigated under sulfate-reducing conditions in microcosms inoculated with either pristine or AFFF-impacted solids. To identify the transformation products, we used high-resolution mass spectrometry and employed suspect-screening and nontargeted compound identification methods. These analyses demonstrated that 6:2 FtTAoS was transformed primarily to a stable polyfluoroalkyl compound, 6:2 fluorotelomer thioether propionate (6:2 FtTP). It did not undergo further reactions to produce the perfluoroalkyl carboxylates and fluorotelomer sulfonates and carboxylates that were observed during aerobic transformations. Here, the 6:2 FtTP was recalcitrant to biotransformation, indicating the stability of the thioether group under sulfate-reducing conditions. The total oxidizable precursor (TOP) assay was used to assess the presence of other PFASs. Although nearly all of the PFAS mass initially present was recovered from the pristine microcosms, only 67% of the initial PFAS mass was recovered from the contaminated microcosms, suggesting the formation of volatile biotransformation products or those that couldmore »
- Authors:
-
- Univ. of California, Berkeley, CA (United States)
- Exponent, Pasadena, CA (United States)
- Arcadis, San Francisco, CA (United States)
- Chinese Academy of Forestry, Beijing (China)
- Univ. of Auckland (New Zealand)
- Aarhus Univ. (Denmark)
- Oregon State Univ., Corvallis, OR (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1479405
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Environmental Science & Technology Letters (Online)
- Additional Journal Information:
- Journal Name: Environmental Science & Technology Letters (Online); Journal Volume: 5; Journal Issue: 5; Journal ID: ISSN 2328-8930
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES
Citation Formats
Yi, Shan, Harding-Marjanovic, Katie C., Houtz, Erika F., Gao, Ying, Lawrence, Jennifer E., Nichiporuk, Rita V., Iavarone, Anthony T., Zhuang, Wei-Qin, Hansen, Martin, Field, Jennifer A., Sedlak, David L., and Alvarez-Cohen, Lisa. Biotransformation of AFFF Component 6:2 Fluorotelomer Thioether Amido Sulfonate Generates 6:2 Fluorotelomer Thioether Carboxylate under Sulfate-Reducing Conditions. United States: N. p., 2018.
Web. doi:10.1021/acs.estlett.8b00148.
Yi, Shan, Harding-Marjanovic, Katie C., Houtz, Erika F., Gao, Ying, Lawrence, Jennifer E., Nichiporuk, Rita V., Iavarone, Anthony T., Zhuang, Wei-Qin, Hansen, Martin, Field, Jennifer A., Sedlak, David L., & Alvarez-Cohen, Lisa. Biotransformation of AFFF Component 6:2 Fluorotelomer Thioether Amido Sulfonate Generates 6:2 Fluorotelomer Thioether Carboxylate under Sulfate-Reducing Conditions. United States. https://doi.org/10.1021/acs.estlett.8b00148
Yi, Shan, Harding-Marjanovic, Katie C., Houtz, Erika F., Gao, Ying, Lawrence, Jennifer E., Nichiporuk, Rita V., Iavarone, Anthony T., Zhuang, Wei-Qin, Hansen, Martin, Field, Jennifer A., Sedlak, David L., and Alvarez-Cohen, Lisa. Wed .
"Biotransformation of AFFF Component 6:2 Fluorotelomer Thioether Amido Sulfonate Generates 6:2 Fluorotelomer Thioether Carboxylate under Sulfate-Reducing Conditions". United States. https://doi.org/10.1021/acs.estlett.8b00148. https://www.osti.gov/servlets/purl/1479405.
@article{osti_1479405,
title = {Biotransformation of AFFF Component 6:2 Fluorotelomer Thioether Amido Sulfonate Generates 6:2 Fluorotelomer Thioether Carboxylate under Sulfate-Reducing Conditions},
author = {Yi, Shan and Harding-Marjanovic, Katie C. and Houtz, Erika F. and Gao, Ying and Lawrence, Jennifer E. and Nichiporuk, Rita V. and Iavarone, Anthony T. and Zhuang, Wei-Qin and Hansen, Martin and Field, Jennifer A. and Sedlak, David L. and Alvarez-Cohen, Lisa},
abstractNote = {The fate of per- and polyfluoroalkyl substances (PFASs) in aqueous film-forming foams (AFFFs) under anaerobic conditions has not been well characterized, leaving major gaps in our understanding of PFAS fate and transformation at contaminated sites. In this study, the biotransformation of 6:2 fluorotelomer thioether amido sulfonate (6:2 FtTAoS), a component of several AFFF formulations, was investigated under sulfate-reducing conditions in microcosms inoculated with either pristine or AFFF-impacted solids. To identify the transformation products, we used high-resolution mass spectrometry and employed suspect-screening and nontargeted compound identification methods. These analyses demonstrated that 6:2 FtTAoS was transformed primarily to a stable polyfluoroalkyl compound, 6:2 fluorotelomer thioether propionate (6:2 FtTP). It did not undergo further reactions to produce the perfluoroalkyl carboxylates and fluorotelomer sulfonates and carboxylates that were observed during aerobic transformations. Here, the 6:2 FtTP was recalcitrant to biotransformation, indicating the stability of the thioether group under sulfate-reducing conditions. The total oxidizable precursor (TOP) assay was used to assess the presence of other PFASs. Although nearly all of the PFAS mass initially present was recovered from the pristine microcosms, only 67% of the initial PFAS mass was recovered from the contaminated microcosms, suggesting the formation of volatile biotransformation products or those that could not be detected by the TOP assay.},
doi = {10.1021/acs.estlett.8b00148},
journal = {Environmental Science & Technology Letters (Online)},
number = 5,
volume = 5,
place = {United States},
year = {Wed Apr 04 00:00:00 EDT 2018},
month = {Wed Apr 04 00:00:00 EDT 2018}
}
Web of Science