The diversity of the structure of dyes represents an obstacle in deciding which technology would be the best example for their elimination from wastewater, and recently there has been a lot of interest in advanced oxidation processes and their mechanism of action, which consists in the release of reactive molecules containing oxygen. They must be present in sufficient quantities so that we can clean the sewage with them. Accordingly, the idea of combining environmentally friendly methods with feasible and cost-effective procedures was conceived, the most interesting example of which is cavitation. In the thesis, we wanted to develop a method that, together with hydrodynamic cavitation, could determine how much dye was successfully removed. We chose two dyes, Methylene blue and Reactive red 120, and diluted each individually to obtain solutions of different concentrations, whose absorbance was measured with a spectrophotometer and we also plotted the trendlines based on the obtained measurements. At the same time, we made solutions with different concentrations of hydrogen peroxide and also analyzed it in a spectrophotometer. In the second part of the experimental work, we focused on hydrodynamic cavitation and its effect on the removal of Reactive red 120 dye in the presence of hydrogen peroxide.
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