Fotodegradación con TiO2 del colorante Rojo Amaranto en aguas

Abstract

Introduction: Sensitivized biodegradation, with TiO2 and sun light, is a technique which can be used as a depuration system by itself, or as a tertiary process, especially for industrial remains treatment. Photocatalytical technologies are very promising for their application on the solving of water contamination problems. Those technologies are very well regarded to be implemented, because the use of sun light reduces in a great measure the costs of the treatment. The use of this technique to degrade and mineralize the Amaranth Red Dye, can be implemented as a more appropriate alternative than other traditional oxidation processes. Objective: To study heterogeneous catalysis of Amaranth Red dye, by the use of a sun light collector and titanium oxide as a catalyst. Materials and methods: For the photocatalysis process, a composed cylinder parabolic sunlight collector (CPC) was used and the conditions under which the higher measurements of color removal were gotten were analyzed. The variables analyzed for this purpose were the concentration of the catalyst (TiO2), the hydrogen peroxide concentration and the relation between both of them before the degradation and mineralization of the color. Results:For this work synthetic solutions dyed with 100mg/L Amaranth Red color prepared with potable water. The most influent parameter on the degradation percentages reached, is the use of TiO2 mixed with hydrogen peroxide. The maximum degradation percentage obtained was 93.48% for titanium dioxide concentration of 150mg/L and 2 ml/L of hydrogen peroxide. Conclussion: The used of appropriate concentrations of TiO2 and H2O2 allows to obtain good degradation and mineralization percentages of the Amaranth Red Dye contained in water.