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3859876 
Journal Article 
Boron doped diamond electrooxidation of 6:2 fluorotelomers and perfluorocarboxylic acids. Application to industrial wastewaters treatment 
Gomez-Ruiz, B; Gomez-Lavin, S; Diban, N; Boiteux, V; Colin, A; Dauchy, X; Urtiaga, Ane 
2017 
Journal of Electroanalytical Chemistry and Interfacial Electrochemistry
ISSN: 0022-0728 
Elsevier 
798 
Elsevier 
51-57 
The aim of this study was to determine the viability of electrochemical oxidation to degrade and mineralize poly and perfluoroalkyl substances (PFASs) in wastewaters from an industrial facility dedicated to the production of side-chain-fluorinated polymers and fluorotelomer-based products for fire-fighting foams. 6:2 fluorotelomer sulfonamide allcylbetaine (6:2 FTAB, 1111 mu g/L), 6:2 fluorotelomer sulfonic acid (6:2 FTSA, 242.5 mu g/L) and 6:2 fluorotelomer sulfonamide propyl N,N dimethylamine (M4, 34.4 mu g/L) were the most abundant PFASs in the industrial wastewater, that also contained perfluorocarboxylic acids (Sigma PFCAs, 12.2 mu g/L), high TOC and chloride as main anion. 2 L samples were treated in bench scale experiments performed at a current density of 50 mA/cm(2), in a commercial cell equipped with a boron doped diamond (BDD) anode (70 cm(2)). 97.1% of the initial PFASs content was removed after 8 h of electrochemical treatment. Furthermore, the TOC removal (82.5%) and the fluoride release confirmed the PFASs mineralization. Based on the evolution of the different PFASs, electrochemical degradation pathways were proposed. Fluorotelomers sulfonamides 6:2 FTAB and M4 would be degraded into 6:2 FTSA, which conversely would give rise to PFHpA and preferentially PFHxA. The latter PFCAs were transformed into shorter-chain PFCAs, and eventually into CO2 and fluoride. The reported results support the technical viability of BDD electrooxidation for the treatment of PFASs in industrial wastewater. 
Poly- and perfluoroalkyl substances (PFASs); 6:2 FTSA and 6:2 FTAB; Perfluorocarboxylic acids; Electrochemical oxidation; Boron doped diamond anode; Industrial wastewater 
PFAS
• FtS 6:2
     Literature Search
          WOS
• FtS 8:2
     Literature Search
          WOS
     Screening Results
          Excluded/Not on Topic
• ^Per- and Polyfluoroalkyl Substances (PFAS)
     PFOA (335-67-1) and PFOS (1763-23-1)
          Literature Search – Adverse outcome pathway (2015-present)
               WOS
     PFHpA (375-85-9)
          Literature Search
               WOS
     PFHxA (307-24-4)
          Literature Search
               WOS
     FtS 8:2 (39108-34-4)
          Literature Search
               WOS
     FtS 6:2 (27619-97-2)
          Literature Search
               WOS
• PFHpA
     Literature Search
          WOS
     Screening Results
          Excluded/Not on Topic
• PFOA (335-67-1) and PFOS (1763-23-1)
     Literature Search – Adverse outcome pathway (2015-present)
          WOS
     Screening Results
          Excluded/Not on Topic
     Literature Search Update (2013-2019)
          WOS