مهدي شهرياري سرچشمه

This study investigated the decolorization of Allura Red (AR) using a hydrodynamic cavitation-based AOP combined with hydrogen peroxide, sodium persulfate, and UV radiation. To eva‎luate the impact of key variables and achieve maximum decolorization, experiments were designed using the Box-Behnken Design (BBD) for three primary variables including hydrogen peroxide concentration (0-70 ppm), sodium persulfate concentration (0-200 ppm), and UV power (0-32 watt). Results revealed that at the optimal conditions of 41.3 ppm hydrogen peroxide, 197 ppm sodium persulfate, and 32 watt UV radiation, a decolorization efficiency of 99.23% was achieved. The selected combined process exhibited a first-order reaction rate constant of 80.53 × 10-3 min-1, an energy yield of 9.90 × 10-3 mg/kJ, and a synergy factor of 6.059. To assess the effect of initial dye concentration, Allura Red concentrations of 15 ppm and 40 ppm were experimented under optimal conditions, resulting in decolorization efficiencies of 99.99% and 83.42%, respectively. Furthermore, tert-butanol and ethanol were used as radical scavengers to investigate the contribution of hydroxyl and sulfate radicals, reducing decolorization to 74.53% and 53.10%, respectively. Finally, a comprehensive economic assessment based on the Cost Effectiveness Ratio (CER) was conducted to compare all processes. The CER value for the selected process was calculated to be 0.024.

اكسيداسيون پيشرفته , كاويتاسيون هيدورديناميك , سرخ آلورا , هيدروژن پراكسيد , سديم پرسولفات , اشعه فرابنفش

Advanced Oxidation Process , Hydrodynamic Cavitation , Allura red , Hydrogen peroxide , Sodium persulfate , Ultraviolet radiation

Mahdi Shahryari Sarcheshmeh

Omid Vahidi, Soroush Baradaran