Abstract A theoretical analysis is performed employing the film model for the isothermal absorption and self-decomposition of ozone in aqueous solutions with interfacial resistance, which is inversely proportional to the interfacial mass transfer coefficient ks. A closed-form solution has been obtained. The effects of system parameters on the ozone mass transfer rate are examined. These parameters include the interfacial resistance (1/ks), the acidic and basic self-decomposition reaction rate parameters (Mm 0.5, Mn 0.5.; Mm = [2DAkmCAi m-1/(m+1)]/(kL 0)2, Mn=(2DAknCAi n-1/(n+1))/(kL 0)2, the reaction orders (m,n), the pH value of solution, and the liquid-phase mass transfer coefficient (kL 0). The results indicate that the reduction effect of the interfacial resistance on the absorption rate is most significant for the situation with the larger values of Mm and Mn as well as with higher pH values. Also, for any particular finite value of kL 0/ks, the reduction effect encountered is greater for a gas liqui...