Photolysis of methylene blue dye in a continuous flow reactor: Influence of brackish water Fernando Luiz Camacho Martins, Caroline Cruz Cézar Machado, Karina Tamião de Campos Roseno

Abstract

Textile and other industries use methylene blue (AM) as a dye, and often this dye is improperly discarded by the economic impracticability of the prevention methods or even by failures in the dyeing processes targeting the sewage networks. In the coastal region, there is water infiltration of the groundwater in the sewage network. Conventional treatments of ETEs-Sewage Treatment Stations are not able to remove much of these dyes, which can be found in water bodies. The present work had as objective to evaluate the efficiency of the Advanced Oxidative Process (AOP) of Fotolysis by artificial irradiation (UV-Ultraviolet) in the degradation of AM dye in fresh and brackish water solution with salinity of 20%. For this purpose a continuous flow tubular reactor with a UV lamp installed in the central part of the interior was used. The results showed that salinity contributed to the degradation of the dye.