Advanced oxidation processes are a set of chemical treatment methods and procedures used to remove pollutants present in wastewater by oxidation through the reaction whichinvolvesthe formation of hydroxyl radicals (OH-). The advantages and drawbacks of these processes are highlighted, while some of challenges, such as: the decrease of operational cost andthe adoption of strategies for processes integration are ongoing. These processes are sensitive to variations in temperature, pH, pollutant concentration, ozone concentration and the amount of catalyst used. In order to remove these shortcomings, in this paper we propose the preparation of heterogeneous cationic catalysts, based on chemically modified composites materials of the smectite type (Montmorillonite) with copper and zinc, and testing this catalyst in order to obtain a total mineralization of Malachite Green dye from solutions. Montmorillonite is a smectite clay extracted from bentonite, which is distinguished by two tetrahedron sheets arranged in the hexagonal rings. By catalytic ozonation processes can be achieved a partial or a total mineralization of dyes into CO2 and water only if are added a optimum amounts of catalyst and oxidizing agent, and find the optimum pH, time and concentration of the organic substrate, as presented in Fig.1. [1]. Figure 1. Catalytic ozonation of Malachite Green dye 5 x 10-5 M, Catalystdose: 0, 5, 10, 20, 30, 40 mg/L-1, O3dose: 0.5 g.h-1