Abstract:Metallurgical slag, as a solid waste generated by the metallurgical industry, has the characteristics of complex composition and difficult treatment, which brings difficulties for its resource utilization. The application of metallurgical slag as a catalyst to treat organic wastewater through the advanced oxidation process of persulfate is an effective way to realize the resource utilization of metallurgical slag. The latest research progress on the activation of persulfate at home and abroad by metallurgical slag, including steel slag, copper slag, electrolytic manganese residue and red mud, was reviewed. In addition, the strengthening strategy of persulfate process activated by metallurgical slag was described. Finally, the existing problems in current application and future research directions of metallurgical slag as persulfate catalyst were analyzed, so as to promote the development of related work.