Study on degradation performance and exothermic law of Fe3O4 @MSCe/H2O2 multiphase Fenton system

Abstract:

In this paper, a semi-coke with a particle size of 5-8 mm was used as a carrier to prepare a semi-coke loaded Fe₃O₄ composite material (Fe₃O₄@MSCe). The physicochemical properties and valence bond structure of the sample were characterized by SEM, XPS, XRD and FTIR, and the decomposition performance and heat release law of Fe₃O₄@MSCe/H₂O₂ multiphase Fenton system were studied. The results show that Fe₃O₄@MSCe retains the porous morphology of the semi-coke, and Fe₃O₄ is uniformly and firmly supported on the surface of the semi-coke particles. Under the alkaline conditions of pH=7.8～11.2, both maintain good decomposition activity. In the case of [H₂O₂] =0.25 mol/L, Fe3O4@MSCe dosage is 533 g·L^-1, pH=7.8, T₀=30 ℃, 300 mL o-phenylenediamine solution with a concentration of 0.04 mol·L^-1 decomposition, the rate is 90.9%, and the temperature rise value of the solution is 7.1 ℃. It shows good decomposition performance and exothermic characteristics, which provides technical support for solving the problems of the existing Fenton technology and the energy utilization of sewage treatment.