ABSTRACT
The kinetics of heterogeneous reactions is governed by absorption theories of gases in liquids accompanied by chemical reactions. The fundamentals of these theories are necessary to understand the phenomena developing during the ozonation of compounds in water. The necessary steps for studying the kinetics of gas-liquid reactions are described below. Since ozone reactions can be considered irreversible, isothermic, and second-order1 (for a general ozone-B reaction) or pseudo first-order (the ozone decomposition reaction), the discussion that follows mainly refers to this type of gas-liquid reaction. Nonetheless, some fundamental aspects on series-parallel reactions are also given. Note that ozonation of compounds in water yields a series of by-products that also react with ozone. Therefore, the kinetics of seriesparallel gas-liquid reactions constitutes another part of this study. As a first step, the physical absorption of a gas in a liquid is discussed below.
