The Decomposition of Ozone in Aqueous Solution^1,2

Abstract

The rate of decomposition of ozone in aqueous perchloric acid has been measured spectrophotometrically, iodometrically and manometrically, and found proportional to the three-halves power of the ozone concentration, in agreement with the reaction scheme proposed by J. Weiss. In connection with the kinetic experiments, the molar extinction coefficient of ozone at 260 m/ , and the Henry's law constant, have been determined for solutions of ozone in 0.01 M HClOi. As in the case of hydrogen peroxide, it is difficult to obtain reproducible rates of decomposition from day to day, and the greater (1)

Determinants of disinfectant pretreatment efficacy for nitrosamine control in chloraminated drinking water

“…Polymer doses given as dose of active ingredient. Utility Sample code (ε 260 ¼ 3000 M À1 cm À1 ) (Kilpatrick et al, 1956). Ozone was dosed at between 0.2 and 2.0 mg/L, and the residual was monitored by the indigo method (Bader and Hoigne, 1981) until it was undetectable (<0.1 mg/L).…”

Ozone Degrades into Hydroxyl Radical under Physiological Conditions

“…Other workers have suggested that H202 may be another intermediate of ozone decomposition (1,11,13,28). It is generally accepted that these reported free radicals are the reactant species in ozone toxicity (1,12,13,(15)(16)(17). Evidence for radical production however, usually was obtained under nonphysiological conditions using very high ozone concentrations and acidic (pH 2.0-4.5) or basic (concentrated KOH) conditions (15,28).…”

“…It is generally accepted that these reported free radicals are the reactant species in ozone toxicity (1,12,13,(15)(16)(17). Evidence for radical production however, usually was obtained under nonphysiological conditions using very high ozone concentrations and acidic (pH 2.0-4.5) or basic (concentrated KOH) conditions (15,28). ' Portions of this study were In the present study, mild ozone conditions were used at physiological pH values and ozone concentrations to facilitate the understanding of ozone degradation in biological systems.…”

Microbiologic Studies With Ozone. Quantitative Lethality of Ozone for Escherichia Coli

“…shown in figure 11. Spontaneous decomposition of ozone in aqueous solution has been Another factor that requires some knowlextensively studied with divergent results and edge, because of the role it plays in biologic concomitant theories to explain them (25)(26)(27)(28)(29)(30)(31)(32)(33) …”