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3859275 
Journal Article 
Aerobic biodegradation of 2 fluorotelomer sulfonamide-based aqueous film-forming foam components produces perfluoroalkyl carboxylates 
D'Agostino, LA; Mabury, SA 
2017 
Yes 
Environmental Toxicology and Chemistry
ISSN: 0730-7268
EISSN: 1552-8618 
36 
2012-2021 
English 
The biodegradation of 2 common fluorotelomer surfactants used in aqueous film forming foams (AFFFs), 6:2 fluorotelomer sulfonamide alkylamine (FTAA) and 6:2 fluorotelomer sulfonamide alkylbetaine (FTAB), was investigated over 109 d with aerobic wastewater-treatment plant (WWTP) sludge. Results show that biodegradation of 6:2 FTAA and 6:2 FTAB produces 6:2 fluorotelomer alcohol (FTOH), 6:2 fluorotelomer carboxylic acid (FTCA), 6:2 fluorotelomer unsaturated carboxylic acid (FTUCA), 5:3 FTCA, and short-chain perfluoroalkyl carboxylates (PFCAs). Additional degradation products included 6:2 fluorotelomer sulfonamide (FTSAm), which was a major degradation product in the presence of either active or sterilized sludge, whereas 6:2 fluorotelomer sulfonate (FTSA) production was measured with sterilized sludge only. Six additional degradation products were tentatively identified by quadrupole time-of-flight mass spectrometry (qTOF-MS) and attributed to N-dealkylation and oxidation of 6:2 FTAA. Environ Toxicol Chem 2017;9999:1-10. © 2017 SETAC. 
Aerobic biodegradation; Perfluoroalkyl substance; Contaminant of emerging concern; Aqueous film-forming foam 
PFAS
• 5:3 acid
     Literature Search
          Pubmed
     Screening Results
          Excluded/Not on Topic
• Additional PFAS (formerly XAgency)
     Literature Search November 2019
          PubMed
          ToxNet
     Not prioritized for screening
     2-Perfluorooctyl ethanoic acid
• Expanded PFAS SEM (formerly PFAS 430)
     Litsearch: September 2019
          PubMed
     Not prioritized for screening
     3:2 Fluorotelomer alcohol
     2H-Perfluoro-2-octenoic acid (6:2)
     2-(Perfluorohexyl)ethanoic acid
• FtOH 6:2
     Screening Results
          Excluded/Not on Topic
• ^Per- and Polyfluoroalkyl Substances (PFAS)
     FtS 6:2 (27619-97-2)
          Literature Search
               Pubmed
     FtOH 6:2 (647-42-7)
          Literature Search
               Pubmed
     5:3 acid (914637-49-3)
          Literature Search
               Pubmed
• PFAS Universe
     Data Source
          Web of Science
          Pubmed
     2-(Perfluorohexyl)ethanoic acid
     2-(Perfluorohexyl)ethanol
     2H,2H,3H,3H-Perfluorooctanoic acid
     2H-Perfluoro-2-octenoic acid (6:2)
• PFNA
     Litsearch Update 2017-2018
          Pubmed
          Toxline
     Literature Search
          Pubmed
          Toxline
     PFNA May 2019 Update
          Toxnet
     Title and Abstract Screening
          Excluded
               Not relevant to PECO