ABSTRACT
Ozone decomposition in aqueous solutions has an special importance due to it’s employment, in large amounts, for waste waters’ treatment and purifying applications. The ozone decomposition may be accelerated by concatenated radical-type reactions, which are promoted or inhibited by some substances that may be found in water. The process’ global kinetic models concluded by different authors are not in good agreement, so the reaction orders as functions of the ozone’s concentration vary between 1 and 2 depending on the pH values (decomposition accelerates at high pH values) but also on the employed water’s purity. The partial reaction order’s value, at the ozonization of the CN− ions from the waste waters removed from Bozanta tailings dam, was between 0.9243 and 0.9668, and that of the apparent rate constant was 0.1652 up to 0.2231. The results acquired enabled to set the reaction conditions for the CN− ions from the waste waters removed from the Bozanta tailings dam.
