Estudo da eficiência da aplicação da fotólise e dos processos oxidativos avançados para a degradação dos compostos recalcitrantes: Metribuzin, Carbofurano E 2,4 D.

Abstract

It is currently possible to observe the growing advance of chemical pollution in Brazil, which is linked to a problem that arises with the inappropriate use of pesticides in agriculture, such as Metribuzin, which is a selective herbicide, Carbofuran, which is a chemical agent that acts as an insecticide, and 2,4 D, which is a hormonal herbicide. This is because they have a great potential to pollute soil and water, in addition to there already being studies that mention the relationship between environmental contamination by pesticides and the development of chronic diseases, such as: the emergence of cancer, respiratory problems, Parkinson's disease, among others. Thus, the present study evaluated the efficiency of the application of photolysis and advanced oxidative processes (UV/H2O2 and UV/TiO2) for the degradation of persistent compounds in water. The study showed that the UV/H2O2 and UV/TiO2 processes presented positive results for the degradation of all pesticides analyzed, however, photolysis was only efficient in the degradation of Metribuzin. Considering that conventional water treatments are not efficient in removing persistent compounds, it is suggested that the conventional water treatment system be improved for potable purposes, with the complementary use of Advanced Oxidative Processes and ultraviolet radiation.