Estudo da inativação da bactéria salmonella sp. por fotólise e fotocatálise usando filmes de TiO2 obtidos eletroquimicamente

Abstract

Since the beginning of mankind, human being are an easy target for diseases transmitted by food and contaminated waters. Nowadays, with new technologies, there are many ways to eliminate these pathogenic bacteria. This thesis brings a study about the inhibition of the Salmonella sp. by photocatalysis, using titanium dioxide pure and modified with AgNO3 and NH4OH, as photocatalyst, under UV light for 2 hours, constant stirring. When compared with photolysis, the use of this photocatalyst has implied in drastic decrease of the microorganism growth during the first 30 minutes. The results show that TiO2 perfomed well as photocatalyst, wherein the modified films obtained the better results, due to doping and superficial area. That results leads to believe the process could be viable to remove pathogenic bacteria from effluents and residual waters.