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Drinking water and biofilm disinfection by Fenton-like reaction

Abstract : A Fenton-like disinfection process was conducted with Fenton's reagent (H2O2) at pH 3 or 5 on autochthonous drinking water biofilms grown on corroded or non-corroded pipe material. The biofilm disinfection by Fenton-like oxidation was limited by the low content of iron and copper in the biomass grown on non-corroded plumbing. It was slightly improved by spiking the distribution system with some additional iron source (soluble iron II or ferrihydrite particles appeared as interesting candidates). However successful in situ disinfection of biofilms was only achieved in fully corroded cast iron pipes using H2O2 and adjusting the pH to 5. These new results provide additional support for the use of Fenton's processes for cleaning drinking water distribution systems contaminated with biological agents or organics.
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F. Gosselin, L.M. Madeira, T. Juhna, J.C. Block. Drinking water and biofilm disinfection by Fenton-like reaction. Water Research, IWA Publishing, 2013, 47 (15), pp.5631 - 5638. ⟨10.1016/j.watres.2013.06.036⟩. ⟨hal-01498647⟩



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