Preparation of Thermoplastic Polyurethane/Oleic Acid Modified <scp> Mn ₂ O ₃ </scp> @ <scp> Mn ₅ O ₈ </scp> Composite Fiber Membrane and Its Fenton Degradation on Semi‐Coking Wastewater

ABSTRACT The treatment of semi‐coking wastewater generated during the semicoke production process has long been a bottleneck restricting the development of the coal chemical industry. The Fenton reaction is recognized as one of the most effective strategies for addressing water pollution; however, the susceptibility to mineralization and poor reusability of highly active catalysts has limited their practical application. Herein, a thermoplastic polyurethane (TPU) doped with oleic acid modified Mn 2 O 3 @Mn 5 O 8 (Mn 2 O 3 @Mn 5 O 8 ‐OA) composite fiber membrane was prepared via melt‐blown spinning and blending using a melt‐blown pilot setup. This composite was employed to activate peroxymonosulfate (PMS) for the degradation of semi‐coking wastewater, achieving a maximum chemical oxygen demand (COD) removal efficiency of 72.4%. Material characterization confirmed successful catalyst immobilization and enhanced surface properties. Theoretical calculations provided molecular‐level insights into the adsorption behavior of phenol and its degradation intermediates. The TPU‐based membrane significantly improved catalyst stability and reusability while maintaining high catalytic activity, offering an effective strategy for advanced oxidation processes in complex wastewater treatment.