Abstract
In this research, the advanced oxidative processe (AOP), Photo-Fenton was applied and kinetics studies were realized by the photodegradation of bright blue FCF, ponceau 4R red and tartrazine yellow food dyes. The AOP Photo-Fenton (combining iron/hydrogen peroxide (H2O2, 36% v/v) /ultraviolet (UV) light, processes were studied. The reaction time, concentration and time of exposure to UV light were evaluated for the food dyes described with both AOP. The results exhibited good effectiveness by Photo-Fenton in the photodegradation of bright blue FCF, ponceau 4R red and tartrazine yellow food dyes. The Photo-Fenton (Fe/H2O2/UV light) exposed high photodegradation in shorter reaction time for all food dyes studied. The kinetics studies performed from the photodegradation food dyes data, showed exponential behavior of the concentration as a function of time, given the first-order exponential with good correlation coefficient, R2 = 0,99 for bright blue FCF, ponceau 4R red and tartrazine yellow food dyes. Thus, we can highlight that the Photo-Fenton stand out as an important methodology for treating industrial effluents containing food dyes, combining the advantages of ease, effectiveness and low cost in the process.
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