The reuse of effluent water is one of the main challenges to achieve a more sustainable development. Dyes from the textile industry can percolate, contaminate soils and affect water courses. Advanced Oxidative Processes (AOP), such as heterogeneous photocatalysis with UV light radiation and metallic nanoparticles, generate reactive oxygen species and hydroxyl radicals that can reduce effluent pollutants. This work synthesized zinc oxide (ZnO-NP) and titanium dioxide (TiO2-NP) nanoparticles in order to photodegrade methylene blue and tartrazine yellow dyes. The crystallographic and morphological characterization of the nanoparticles was performed by X-ray diffraction and high resolution scanning electron microscopy. The syntheses produced nanometric particles. The methylene blue dye had greater degradation by TiO2-NP (82 to 85%), whereas the tartrazine yellow dye with ZnO-NP (79.6% removal). It is concluded that the nanoparticles combined with POA are an effective alternative for the photocatalytic degradation of dyes.
RESUMO -O objetivo deste trabalho foi verificar o processo de urbanização prudentino no sentido da zona leste em sua relação com a indisponibilidade de pleno saneamento básico, levando a um quadro de contaminação das águas subterrâneas. Para tanto, utilizou-se, como indicadores da qualidade da água, parâmetros químicos e microbiológicos como o pH, condutividade, concentração de nitrato e coliformes fecais e totais. A pesquisa se pautou, em sua metodologia, por uma análise bibliográfica acerca do problema ora delineado, posteriormente se desenvolvendo mediante pesquisa experimental realizada nas regiões periféricas da zona leste prudentina. Assim, obteve-se resultados que demonstram a presença de compostos químicos e microbiológicos indesejáveis, com enfoque da inadequação quanto ao nitrogênio albuminoide e coliformes fecais e totais. Palavras-chave: águas subterrâneas; urbanização; uso da água.
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