The influence of phosphates on the decomposition of ozone in water: Chain process inhibition
ABSTRACT The addition of phosphates was found to decrease the rate of the decomposition of ozone in water; they accepted hydroxyl radicals
and thereby inhibited chain ozone decomposition. The presence of phosphates decreased the order of the reaction from second
for pure water to one-and-a-half. The rate constants for ozone decomposition in the presence of various phosphate concentrations
increased as pH grew from 4 to 9.
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ABSTRACT: Ozonation of benzaldehyde in its aqueous solutions based on mechanistic approach and incorporating ozone decomposition model is presented in this work. As the basis the modiﬁed and extended HSB model of ozone decomposition with phosphates and carbonates reactions included has been applied. It was then tuned with the literature data and the results of our own measurements on ozone decay in aqueous solutions. The model was extended to model benzaldehyde oxidation reactions in the aqueous solutions. Model predictions compare favorably against experimental data obtained in the range of pH 2.3 to 8 with or without radical scavenger (t-butanol).Ozone Science and Engineering 11/2013; 35(6):489–500. · 0.81 Impact Factor