Catalytic Ozonation over CoFe2O4@MgO magnetic Core–shell Nanocatalyst: Synthesis, Cost Analysis and Process Optimization of Degradation of Color Effluent
摘要
This research aims to explore the catalytic performance of CoFe2O4@MgO core–shell nanoparticles in the degradation of acid red 14 (AR14) through the catalytic ozonation process (COP). The CoFe2O4@MgO and MgO nanoparticles were synthesized using the sol–gel method. Characterization techniques such as TEM, FESEM, EDS, XRD, FTIR, VSM, and N2 adsorption–desorption isotherms were employed to analyze these nanoparticles. The Box-Behnken design was utilized to model and optimize the AR14 degradation process using COP with CoFe2O4@MgO nanoparticles. Various factors, including the initial dye concentration, catalyst dosage, ozonation duration, and ozone inlet flow rate, were examined. A strong correlation was found between the model's predicted values for AR14 degradation efficiency (DE) and the experimental results (R2 = 0.98). The optimization indicated that the maximum DE reached 99.8% at an initial dye concentration of 100 mg L⁻1, catalyst dosage of 10 mg L−1, an ozonation time of 25.3 min, and an ozone mass flow rate of 6 mg min−1.