Fenton process for removal of Sunset yellow as an edible dye

This research was designed to investigate the oxidation (decolorization/degradation) of Sunset Yellow azo dye which is used greatly as colorant in food and drug industries in aqueous solutions using Fenton (H2O2/Fe2+) reagent.The effect of operating parameters affecting the removal efficiency such as H2O2, Fe2+ and dye concentrations and pH were investigated and optimized.In order to optimize theparameters, the Taguchi fractional factorial design was used (4 factors in 4 levels).Optimum conditionsfor Fenton process were established as:(0.005 mmol Fe, 0.1 mmol H(2)O(2), 20 mg/L initial dye concentration and pH=3).The results showed that Fenton process have high ability in Sunset yellow removal, so this advanced oxidation process can be used for removal of Sunset yellow from waste waters.

Keywords:

Advanced oxidation process , Fenton , Sunset yellow , Experimental design , Taguchi