@article{10902/11108,
year = {2017},
month = {8},
url = {http://hdl.handle.net/10902/11108},
abstract = {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.},
organization = {This work was supported by the Spanish Ministry of Economy and Competitiveness (CTM2013-44081-R and CTM2016-75509-R). B. Gomez also thanks the FPI postgraduate research grant (BES-2014-071045).},
publisher = {Elsevier Sequoia},
publisher = {Journal of Electroanalytical Chemistry, 2017, 798, 51-57},
title = {Boron doped diamond electrooxidation of 6:2 fluorotelomers and perfluorocarboxylic acids. Application to industrial wastewaters treatment},
author = {Gómez Ruiz, Beatriz and Gómez Lavín, Sonia and Diban Gómez, Nazely and Boiteux, Virginie and Colin, Adeline and Dauchy, Xavier and Urtiaga Mendia, Ana María},
}