چكيده به لاتين
In this research, the photocatalytic degradation process of phenol by designing and fabricating an photo-activated reactor to overcome the existing limitations including light distribution and mass transfer was studied. In addition, a stable organic-metal framework photo catalyst was used in the experiments. The synthesized catalyst were characterized by EDX, FE-SEM, XRD, VSM, FTIR, and DRS. The central composite design (CCD) approach-based response surface methodology (RSM) analysis was applied to statistically specify the effect of important process variables. The operating parameters such as pH, amount of catalyst, amount of persulfate, initial phenol concentration and reaction time were optimized. Photocatalytic degradation of phenol was performed by using NiFe2O4/C catalyst which is derived from organic metal structure (Fe/Ni MIL-88) in the presence of visible light. The results showed that the highest photocatalytic degradation efficiency of phenol was about 96.69% which was obtained at optimum value of operating parameters. The optimum value of operating parameters were the 16 mg catalyst, 4 mg ammonium persulfate, the irradiation time of 125 min, pH of 9, and phenol initial concentration of 12 mg/L. According to the photocatalytic mechanism, the presence of ammonium-sulfate and the formation of sulfate radicals has a very important role in the photocatalytic degradation of phenols. In addition, the hydrodynamic of photocatalytic degradation of phenol and its removal from water was simulated by using COMSOL Multi-physics 5.6 software. The simulation results were compared to experimental results and the mesh density was reviewed.
