Arroyave Rojas, Joan AmirGarcés Giraldo, Luís FernandoArango Ruiz, Álvaro de JesúsAgudelo López, Carlota MarcelaMartínez Rivera, Carlos Andrés2012-08-102012-08-102012-08-101909-0455http://hdl.handle.net/10567/592Introduction. The prevention and control of environmental pollution is one of the main responsibilities and concerns of modern men. In recent years a great number of research works have been made for such a purpose, among these we can remark pollutants biodegradation works. This is an advanced technique that aims to reduce or eliminate persistent compounds such as Azo dyes. Objective. To evaluate the degradation of the tartrazine dye by the use of heterogeneous photocatalysis with titanium dioxide and an ultra-violet light lamp. Materials and methods. A factorial randomized experimental design was used. For developing the experiment we used an ultra violet light lamp, a glass container for keeping the tartrazine dye in an aqueous solution and treat it and a pump that allowed the re-circulation of the solution through the photoreactor system. The degradation of the tartrazine dye was determined by the use of ultra-violet/visible espectrophotometry. Results. A good tartrazine dye removal rate was obtained (100,0%) for the combination of chemical oxidation by the use of 0 mg/L of TiO2 and,4 %v/v of the oxidation agent hydrogen peroxide, and the experimental combination of the photo chemical process of heterogeneous photocatalysis with the experimental rehearsals of 50 mg/L of TiO2 and 0,2 %v/v H2O2 and 50 mg/L of TiO2 and 0,4 %v/v H2O2 for a removal rate of 100,0%. Conclusion. Advanced oxidation processes are adequate for removing and eliminating the tartrazine dye.esFotodegradaciónCorporación Universitaria LasallistaÁrea Metropolitana del Valle de AburráTartrazinaFotocatálisis heterogéneaAguas residualesContaminaciónTratamiento de aguas residualesColorante azoicoDióxido de titanio (TIO2)Peróxido de hidrógeno (H2O2)Industria alimenticiaArticle