Research on TiO2/UV-Fenton Catalytic Oxidation of Azocarmine G Dye Wastewater

In this paper, the synergetic action of UV-Fenton catalytic oxidation and nano-TiO₂ photocatalytic to treat Azocarmine G dye wastewater was researched. The results show that the best conditions for the treatment of 250mL Azocarmine G dye wastewater are: the dosage of 30% H₂O₂ is 1mL; the dosage of 0.1mol/L FeSO₄·7H₂O is 3mL; the dosage of nano- TiO₂ is 1g; pH is 4; illumination distance is 21cm. In this case the decolorization rate of dye wastewater will reach 98% and COD removal rate will reach 80%. The best molar ratio of H₂O₂ and Fe²⁺ and light intensity of the reaction are also discussed.