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This study prepares a magnetite (Fe 3 O 4 )-based Fenton-like catalyst based on the residual carbon separated from coal gasification slag as a support by the chemical precipitation method. The catalysts are characterized using XRD, SEM-EDX, and N 2  adsorption-desorption methods. In the process, the adsorption capacity, catalytic activity under various conditions, and catalyst reusability were evaluated with methylene blue as the target pollutant. According to SEM results, Fe 3 O 4  particles are attached to the pore and surface of the residual carbon support and have good dispersion. BET findings demonstrate that Fe 3 O 4 /residual carbon catalyst has a greater surface area and pore volume than residual carbon support. The removal efficiency of MB by adsorption of Fe 3 O 4 /residual carbon catalyst is less than 10% after 120 min. But 2.4Fe-UC catalyst shows 2-h removal rates of 98% when the optimum removal efficiency of MB is under the following conditions: 2.5 mmol/L H 2 O 2 , 0.2 g/L catalysts for 50 mg/L MB at an initial pH of 3. Notably, outstanding catalytic stability and reusability of the 2.4Fe-RC catalyst have been revealed as it can be reused 6 times with&gt;80% of the MB removal efficiency.

Preparation of heterogeneous Fenton catalyst with residual carbon separated from coal gasification slag as carrier