1：Experimental Design and Method Selection:

The study used a chemical co-precipitation method to synthesize TiO2/Fe2O3/PAC and TiO2/Fe2O3/zeolite catalysts at a Fe3+/TiO2 molar ratio of

2：Photocatalytic degradation experiments were conducted in a batch reactor with UV light and H2O2, using response surface methodology (Box-Behnken design) to optimize parameters. Sample Selection and Data Sources:

Synthetic cyanide-contaminated water was prepared using sodium cyanide.

3：List of Experimental Equipment and Materials:

Equipment included XRD (Bruker D-8 Advance), XRF (Bruker S4-Pioneer), FESEM (Nanosem 450), TEM (Philips EM 208S), FTIR (Jasco 6300), BET (Belsorp mini), PL (Varian Cary Eclipse), UV lamp (SNXIN Co., 8W, 254 nm), stirrer-heater, muffle furnace, electric oven, and centrifuge. Materials included powder activated carbon (PAC, Merck), natural zeolite, titanium tetrachloride (TiCl4, Merck), iron(III) chloride (FeCl3, Merck), sodium cyanide (Merck), hydrogen peroxide (H2O2, Merck), and chemicals for pH adjustment (NaCl, HCl, Merck).

4：Experimental Procedures and Operational Workflow:

Catalysts were synthesized by suspending PAC or zeolite in deionized water, adding TiCl4 and FeCl3, adjusting pH to

5：5, stirring at 70°C for 4h, filtering, washing, drying at 80°C, and calcining at 400°C. Photocatalytic experiments involved adding catalyst and H2O2 to cyanide solution, irradiating with UV light for 60-180 min, filtering, and measuring cyanide concentration. Data Analysis Methods:

Cyanide degradation efficiency was calculated using a formula. RSM was used for statistical analysis and optimization. Kinetics were modeled using first-order kinetics. Data were analyzed with ANOVA and other statistical tools.