Preparation of Fe3O4@CSAC catalyst and its degradation performance and heat release mechanisms in sewage degradation

To investigate the exothermic characteristics of a heterogeneous Fenton system during the degradation of organic sewage and provide technical support for energy recovery in sewage treatment, the catalyst Fe3O4@CSAC (coconut shell-activated carbon) was prepared. Subsequently, both the degradation performance and exothermic behaviour of the (Fe3O4@CSAC)-H2O2 heterogeneous Fenton-like system in the degradation of sewage were studied. The results demonstrated that the (Fe3O4@CSAC)-H2O2 heterogeneous Fenton-like system exhibited a high degradation rate for sewage and released a significant amount of heat during the degradation process, making it suitable for energy recovery through a sewage-source heat pump. These findings showed that the concentration of added Fe3O4@CSAC and H2O2 significantly influenced the heat release in the reaction system, underscoring its potential for sustainable and adaptable applications in sewage treatment processes.