Ozonation of p-chlorophenol in aqueous solution

The ozonation of p-chlorophenol (CHP) in aqueous solution has been studied in the pH range 2.0-8.0, in the presence of tert-butyl alcohol, which preve nts the activation of the radical mechanism of oxidation. Results indicate that the pH influences the system reactivity and that only a partial chlori ne release is observed for lengthy ozonation too, after the complete substr ate disappearance. For adopted experimental conditions the oxidation proces s develops under a quasi-diffusional regime of absorption with reaction, a transition domain between kinetic and diffusional regimes in which ozone an d dissolved substances react exclusively in the liquid film. A proper mathe matical model has been developed and used to simulate the system behaviour (C) 1999 Elsevier Science B.V. All rights reserved.