Kinetics of ozone decomposition and oxidation of a model organic compound in water

Abstract

The decomposition of ozone and oxidation of a model, polychlorinated organic compound, 2,3,4,5,6-pentachlorobiphenyl were studied. The parameters included self-decomposition of ozone at various pH values, mass transfer of ozone, and the rate of oxidation of 2,3,4,5,6-pentachlorobiphenyl. The decomposition of ozone follows a second-order reaction kinetics. Below pH 5, the rate of decomposition is not pH dependent and is slow. Above pH 5, the rate is pH sensitive and ko is specific to the ionic strength of the solution. The decomposition of 2,3,4,5,6-pentachlorobiphenyl follows pseudo-first-order reaction kinetics. The decomposition rate varies with temperature, ozone, and substrate concentration in a complex manner even though the dependence of the rate on ozone and substrate concentration is first-order dependent. © 1986.