Abstract
Ozone decomposition in pure water, H2O2 aqueous solution, and water with ethanol admixture is investigated. It is found that, in the presence of H2O2, ozone decomposes significantly faster than in pure water owing to its interaction with H2O2. The effective rate constant (k = (0.023 ± 0.002) l/(mol s)) is determined, which is much higher than the overall rate constant of ozone decomposition in water, but much lower than the specific rate of ozone decomposition in water in the presence of common organic admixtures (fulvic acids, ethanol). It is concluded that at the combined use of O3 and H2O2 for the decomposition of organic admixtures in water, the contribution of their interaction with each other is little.
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