Preparation of silicon-based Fenton-like catalyst carriers based on decarbonized coal gasification fine slag for the degradation of tetracycline hydrochloride

A silicon-based Fenton-like catalyst carrier based on decarbonized coal gasification fine slag (DGFS) was prepared through a process of acid leaching and calcination. Compared with other preparation methods, it has the advantages of simplicity and low cost. The specific surface area and pore volume of the carrier were optimized through single-factor experiments. At the same time, altering the crystal structure through calcination increased its reactivity and strength. Subsequently, Fe2+ was loaded onto the carrier to prepare the metal-carriered Fenton-like catalyst Fe-DSCC, which was then used for the catalytic oxidation degradation of tetracycline hydrochloride (TCH) in water. The results showed that the DGFS-based catalyst carrier (DSCC) prepared under the optimal conditions described in this paper had a specific surface area of 252.40 m2/g and a pore volume of 0.122 cm³/g, higher than most existing Fenton-like catalyst carriers. DSCC is enriched in amorphous structures and functional groups, such as hydroxyl groups, which facilitate the functional modification of the carrier surface. At the same time, the crystal structure of DSCC increases its mechanical strength. Without the involvement of photo- or electo-oxidation, the catalytic oxidation degradation efficiency of TCH by Fe-DSCC within 2 h was 92.49%, showing excellent catalytic oxidation performance. The degradation process is consistent with Bradley fitting. This study provides a new possibility for the high-value utilization of DGFS, the optimization of Fenton-like catalysts, and the removal of TCH pollutants in water.