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THE EFFECT OF DNOM PROPERTIES ON THE KINETICS OF OZONE DECOMPOSITION AND HYDROXYL RADICAL SCAVENGING
Citation:
Elovitz*, M S. AND U. von Gunten. THE EFFECT OF DNOM PROPERTIES ON THE KINETICS OF OZONE DECOMPOSITION AND HYDROXYL RADICAL SCAVENGING. 217th National American Chemical Society Meeting.
Description:
The influence of temperature, pH, alkalinity, and type and concentration of the dissolved organic matter (DOM) on the rate of ozone (O3) decomposition, O3-exposure, *OH-exposure and the ratio R ct of the concentrations of *OH and O3 has been studied. For a standardized single ozone dose of 1 mg/L in all experiments, considerable variations in O 3-exposure and *OH-exposure were found. This has important implications for water treatment plants regarding the efficiency of oxidation and disinfection by O 3. In oligotrophic surface waters and groundwaters, minimal calibration experiments are needed to model and control the ozonation process, whereas in eutrophic surface waters more frequent measurements of O 3 kinetics and R ct values are required to evaluate seasonal variations.