%0 Journal Article %T Boron doped diamond electrooxidation of 6:2 fluorotelomers and perfluorocarboxylic acids. Application to industrial wastewaters treatment %+ Universidad de Cantabria [Santander] %+ Laboratoire d'hydrologie de Nancy (LHN) %A Gomez-Ruiz, Beatriz %A Gómez-Lavín, Sonia %A Diban, Nazely %A Boiteux, Virginie %A Colin, Adeline %A Dauchy, Xavier %A Urtiaga, Ane %< avec comité de lecture %@ 1572-6657 %J Journal of Electroanalytical Chemistry %I Elsevier %V 798 %P 51-57 %8 2017-08 %D 2017 %R 10.1016/j.jelechem.2017.05.033 %K Poly- and perfluoroalkyl substances (PFASs) %K 6:2 FTSA and 6:2 FTAB %K Perfluorocarboxylic acids %K Electrochemical oxidation %K Boron doped diamond anode %K Industrial wastewater %Z Chemical Sciences/Organic chemistryJournal articles %X 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 alkylbetaine (6:2 FTAB, 1111 μg/L), 6:2 fluorotelomer sulfonic acid (6:2 FTSA, 242.5 μg/L) and 6:2 fluorotelomer sulfonamide propyl N,N dimethylamine (M4, 34.4 μg/L) were the most abundant PFASs in the industrial wastewater, that also contained perfluorocarboxylic acids (ΣPFCAs, 12.2 μg/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/cm2, in a commercial cell equipped with a boron doped diamond (BDD) anode (70 cm2). 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. %G English %L anses-03440876 %U https://anses.hal.science/anses-03440876 %~ ANSES %~ AGREENIUM %~ TEST3-HALCNRS