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 prevents the activation of the radical mechanism of oxidation. Results indicate that the pH influences the system reactivity and that only a partial chlorine release is observed for lengthy ozonation too, after the complete substrate disappearance. For adopted experimental conditions the oxidation process develops under a quasi-diffusional regime of absorption with reaction, a transition domain between kinetic and diffusional regimes in which ozone and dissolved substances react exclusively in the liquid film. A proper mathematical model has been developed and used to simulate the system behaviour
Andreozzi
R
R
Fac. di Ingegneria, Dip. di Ingegneria Chimica, Univ. degli Studi di Napoli "Federico II", p.le V. Tecchio, 80-80125, Napoli, Italy. andreo@hp3.irc.na.cnr.it
Marotta
R
R
D002733:Chlorophenols / Q000493:pharmacokinetics*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D010084:Oxidation-Reduction; D010126:Ozone / Q000378:metabolism*; D014877:Water Pollution, Chemical / Q000517:prevention & control*; D014881:Water Supply / Q000592:standards
D002733:Chlorophenols; C029107:4-chlorophenol; D010126:Ozone