Ozone Science and Engineering · 1992 · 18 citations · 6 references
Natural SciencesEnvironmental EngineeringEnvironmental SciencesEnvironmental ChemistryWater Quality EngineeringWater TreatmentAquatic ChemistryOxidation ReactionsOzone ChemistryReactive Oxygen SpeciesWater OxidationWater PollutionContinuous FlowNatural Water ChemistryOzonationOzoneOzone DecompositionOzone Decomposition KineticsOzone Reaction KineticsOzone-oxidation Chemistry
Abstract A laboratory study has been designed to investigate the decomposition of ozone in natural water and to determine its potential to produce hydroxyl free radicals for the oxidation of micropollutants during the ozonation process of drinking water. This report describes the first data obtained using a continuous flow reactor capable of observing reactions with relatively short time scales (Q = 34 mL/min; 1.4 < tc < 27 sec). Rates of ozone decay were studied in fulvic acid solution in the presence, or in the absence of radical scavenger (tert-butyl alcohol) or of promoter of ozone decomposition (formic acid), and a micropollutant of interest (tetrachloroethylene). Also, three natural waters were studied, illustrating that OH radical formation depends on chemical composition of the waters. Key Words: OzoneOzone Decomposition in Natural WatersHydroxyl Free RadicalsMicropollutant OxidationLaboratory StudiesContinuous Flow ReactorFulvic Acid SolutionsTetrachloroethylene (PCE)
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