Tartrazine is the most consumed food coloring in the Moroccan market, its elimination by photodegradation was investigated under UV light 25watt and 220 volts. The process was carried out at a different pH, the catalyst dose TiO2 (rutile and anatase), the concentration of the dye, the effect of H202 and the effect of metal ions Al3 + and Cu2 +. It was found that under the effect of H202 in%, the color of the dye solution became colorless after 80 min with a loss of 99% of .the molecule observed phenomenon is described by a pseudo-first order kinetics . In order to determine the quality of waste water, a measurement of the chemical oxygen demand was performed both before and after treatment and a significant reduction of values was observed, implying good potential for this technique to suppress tartrazine aqueous solutions.
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