With the development of society and the needs of the people,dyes are widely used in textile,printing and leather processing industries,generating a large amount of dye-rich wastewater.Among them,azo dyes account for the highest proportion in the dye production and use market,and efficient technologies are urgently needed to eliminate such toxic pollutants.In this paper,the degradation and mineralization efficacy of two UV advanced oxidation processes,UV/PMS and UV/H2O2,on azo dye wastewater were compared and analyzed using Orange G as an example.The results demonstrated that the UV/PMS process was more advantageous under neutral conditions,removing 100％of the pollutants and 46.4％of the TOC in 20 min when the oxidant concentration was 5 mmol/L and the OG concentration was 50 mg/L.
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