Estudio de la degradación del colorante azul BRL mediante fotocatálisis heterogénea con TiO2 irradiado con electrones acelerados

Abstract

Some studies with gamma and electron-beam irradiation demonstrated an improvement of the photocatalytic activity of TiO2, when this material was treated with electron-beam irradiation. However, it has not so far been reported a detailed study of this effect in the degradation of certain contaminants, as azo dyes. Therefore, this research proposes the use of electron-beam-irradiated microparticulate TiO2 by the degradation of 50 mg L-1 of Direct Blue 1 through photocatalysis. Doses of 5, 10 and 20 kGy were tested. The photodegradation was followed through spectrophotometric methods and the determination of COD and TOC. The obtained results showed an increase of the rate constant when TiO2 was irradiated: 7,71% for 10 kGy. Also, the treatments carried out with irradiated and unirradiated TiO2 don’t reflected statistical significant differences between in adsorption. There was scarce mineralization