Photooxidation Contribution Study on the Decomposition of Azo Dyes in Aqueous Solutions by VUV-Based AOPs

Table 4

Summarized result for comparison among treatment efficiencies of dyes by various AOPs.

Items	Acid Orange 8	Acid Blue 29	Acid Blue 113
Condition	[Dye] = 0.0523 mM, [H2O2] = 100 mg/L, [TiO2] = 0.5 g/L, VUV intensity = 110 V, 25°C, 400 rpm
pH 3	VUV/H2O2 > VUV/TiO2 > VUV/TiO2/H2O2 > VUV only	VUV/TiO2/H2O2 > VUV/TiO2 > VUV/H2O2 > VUV only	VUV/TiO2/H2O2 > VUV/TiO2 > VUV/H2O2 > VUV only
pH 7	VUV/H2O2 > VUV/TiO2 > VUV/TiO2/H2O2 > VUV only
pH 11	VUV/H2O2 > VUV only > VUV/TiO2 > VUV/TiO2/H2O2