Uso de fotólise direta e h2o2/uv em solução aquosa contendo o corante violeta cristal

In this work, the Crystal Violet (CV) dye discoloration was investigated by direct photolysis and photoassisted peroxidation in a reactor open to the atmosphere under UV irradiation, having as source of radiation a lamp without bulb mercury vapor of 125W E27. The optimal range of photolysis of VC dye was 7,0 x 10 -6 mol.L -1 , featuring a percentage of discoloration around 12, 37 and 25% larger compared to the other concentrations, and the monitoring of the variation of the Absorbance x Time (min) through the curves confirmed that in fact this was the concentration that most discolored. The effect of H 2 O 2 on discoloration of the aqueous dye solution at 9,0 x 10 -6 mol.L -1 was analyzed, and it was concluded that the addition of this oxidant it benefited the photolysis process.