The evaluation of improved degradation of Acid Black ATT dye in aqueous solution by hybrid photo-ozonation peroxymonosulfate process

Abstract

Abstract The present study was designed and conducted to simultaneously produce two sulfate and hydroxyl radicals for the decomposition of Acid Black ATT dye, which showed that UV radiation and ozonation alone cannot decompose and break down this dye compound completely. The UV/O3/PMS process is able to completely remove all dye concentrations from 10 to 30 mg / L in 10 minutes. Then, the effect of parameters such as contact time, pH, initial dye concentrations, different doses of persulfate, and ozone under ultraviolet radiation on dye removal was studied. Based on the results of this experiment, the optimal concentrations of variables include pH, ozone concentration, and persulfate concentration, and initial dye concentration includes 10, 20 mg /min, 0.4 mM L− 1, and 20 mg/ L, respectively. For every 0.1 mM increase in PMS concentration, the amount of dye removal increased by 14%. Based on the findings of this study, the combined UV/O3/PMS process can be concluded that the environmentally friendly hybrid technology of advanced sulfate-based oxidation removes contaminants resistant to aqueous media.