In this undergraduate thesis, Fe2O3 catalysts on carbon nanotubes (NTC) were synthesized for the Fenton and photo-Fenton reaction in order to treatment of wastewater form microbiological labs containing dyes and pathogens. Carbon nanotubes were obtained by the catalytic Vapour Deposition technique at 700 ° C using a catalyst of Ni, Cu and Al. The effect of reactant gas flow, the use of diluent gas and the reaction time was studied. The catalysts (1, 3 and 5 % of Fe) were obtained by the incipient wetness impregnation technique. The NTC and the supported catalysts were characterized by Proximal Analysis, Scanning Electron Microscopy (SEM) and transmission (TEM), X -ray Dispersive Spectroscopy (EDS), Raman and X-ray diffraction (XRD). The catalytic tests were conducted in a batch reactor operated at room temperature, a 33 factorial design was employed in order to select the variables, the H2O2 concentration, the mass of the catalyst and the Fe nominal content were studied. Subsequently, experiments as a function of time with the treatments that showed the best results were performed. The percentage color and Total Organic Carbon abetement and the inactivation of E.coli was assessed.