Abstract
This research investigates the kinetics and mechanisms of the reactions between dissolved ozone and mono-chlorophenols in distilled water. The stoichiometric determination indicates that three moles of ozone are required for complete conversion of each mole of chlorophenol. A stopped-flow spectrophotometer system was applied to obtain the kinetic data. p-Chlorophenol is the most reactive of the three isomers with ozone yielding second order rate constants of 10800–56000 1/ M s as the temperature increases from 10 to 35°C. The ozonation reaction is first order in ozone, and independent of the concentration of o- or m-chlorophenol. The kinetic results suggest that the reactions of the three isomers are governed by different pathways though all of the ozonation reactions might be initiated by electrophilic addition.
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