Reactivity of Performic Acid with Organic and Inorganic Compounds: From Oxidation Kinetics to Reaction Pathways
- Christelle Nabintu KajokaChristelle Nabintu KajokaLEESU, Ecole des Ponts, Univ Paris Est Creteil, F-94010 Creteil, FranceMore by Christelle Nabintu Kajoka
- Johnny GasperiJohnny GasperiLEE - Laboratoire Eau et Environnement, Université Gustave Eiffel, F-44344 Bouguenais, FranceMore by Johnny Gasperi
- Stephan BrosillonStephan BrosillonIEM - Institut Européen des Membranes, Université de Montpellier, F-34090 Montpellier, FranceMore by Stephan Brosillon
- Emilie CauposEmilie CauposLEESU, Ecole des Ponts, Univ Paris Est Creteil, F-94010 Creteil, FranceMore by Emilie Caupos
- Emmanuelle MeboldEmmanuelle MeboldObservatoire des Sciences de l’Univers OSU-EFLUVE, plateforme PRAMMICS, Université Paris Est Créteil, CNRS, F-94010 Créteil, FranceMore by Emmanuelle Mebold
- Marcos OliveiraMarcos OliveiraSIAAP - Service Public de l’assainissement Francilien (SIAAP), Direction Innovation, F-92700 Colombes, FranceMore by Marcos Oliveira
- Vincent RocherVincent RocherSIAAP - Service Public de l’assainissement Francilien (SIAAP), Direction Innovation, F-92700 Colombes, FranceMore by Vincent Rocher
- Ghassan ChebboGhassan ChebboLEESU, Ecole des Ponts, Univ Paris Est Creteil, F-94010 Creteil, FranceMore by Ghassan Chebbo
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- Julien Le Roux*
Performic acid (PFA) has gained interest as an alternative chemical disinfectant for wastewater (WW) treatment, but its reactivity with WW constituents remains poorly understood. This study evaluated PFA’s ability to oxidize 45 inorganic and organic compounds commonly found in WW (amino acids, simple organic compounds with specific functional groups, e.g., amines and phenolic compounds, and pharmaceutical micropollutants). PFA does not react with most major ions, except for iodide ions, and reacts with iron(II) in the absence of phosphate buffer. While many organic molecules do not react with PFA, compounds containing reduced-sulfur moieties (e.g., thioether or thiol) are the most reactive (i.e., ranitidine, benzenethiol, and 3-mercaptophenol), followed by compounds with tertiary amine groups (e.g., lidocaine). The reactions follow second-order kinetics with respect to both organic compounds and PFA concentrations. Similar trends were observed in real WW effluents, although removals of pharmaceuticals were lower than expected due to the probable consumption of PFA by WW constituents (dissolved organic carbon, other micropollutants, or transition metals). The results highlight PFA’s selective reactivity with specific functional groups and a low transformation of compounds mostly through oxygen addition (e.g., S-oxide or sulfonyl compounds formed from thiol and thioether moieties and N-oxides from amine groups) with similar mechanisms to peracetic acid.
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