Synergistic removal of organics from semi-coke wastewater by persulfate and cyanide tailings

•Proposed a method of synergistic removing organics from semi-coke wastewater by persulphate and cyanide tailings.•Realized the deep treatment of semi-coke wastewater.•Proved the advanced oxidation and coagulation in the PS-CTs system.•Simultaneous realized the de-cyanidation of cyanide tailings in the PS-CTs system.