Degradation Efficiency and Kinetics Analysis of an Advanced Oxidation Process Utilizing Ozone, Hydrogen Peroxide and Persulfate to Degrade the Dye Rhodamine B

In this study, the effectiveness of a rhodamine B (RhB) dye degradation process at concentration 20 mg/L in different advanced oxidation processes—H2O2/UV, O3/UV and PDS/UV—has been studied. The use UV photo-assisted ozonation (O3/UV) proved to be most effective method RhB decolorization (90% after 30 min 100 mg/L). addition sulfate radical precursors (sodium persulfate, PDS) reaction environment did not give satisfactory effects (17% min), compared PDS/UV system (70% min). No was observed using hydrogen peroxide as sole reagent, whereas an effect on degree when rays strike sample with H2O2 (33% followed pseudo-first-order kinetics model. combined PDS/O3/UV has shown 60% color removal time initial mg/L. A similar obtained by only applying ozone or UV-activated but 2–5 times lower (20 results indicated that is promising for high concentrations (50–100 mg/L) comparing other alternative processes.