Bicarbonate-Activated Hydrogen Peroxide for an Azo Dye Degradation: Experimental Design

The present study investigated the degradation of an aqueous Allura Red AC (AR–AC) solution by activating hydrogen peroxide with bicarbonate using cobalt ion (Co2+) as catalyst. Four independent variables (H2O2, NaHCO3, Co2+, and dye concentrations) were analyzed in composite central design (CCD). AR–AC was optimized response surface methodology (RSM). Under optimal conditions (41.86 mg/L AR–AC, 5.58 mM H2O2, 2.00 9.00 µM Co2+), decolorization > 99.86%, mineralization (CO2 to conversion) 12.99%, total nitrogen removal 51.97% achieved. predicted values for three consistent experimental values, determination coefficients (R2) greater than 0.9053. Because ions are a source water pollution, after oxidation, these adsorbed on sodium bentonite (Na–Bent), obtaining final concentration <0.01 mg/L. Bicarbonate-activated is potential technology wastewater treatment that operates at alkaline pH ambient temperature.