DATA & FILE OVERVIEW  1. Description of dataset  These data were generated to investigate the catalytic activity of the LaFeO3-RM/BS system.    All experiments were carried out in 250 mL beakers at 25\2≧ under mechanical stirring with a double-blade impeller (300 r/min) to ensure full blending and sufficient contact with air. The beakers were covered with aluminum foil to avoid light.  2. File List:   File 1 Name: YaoLi-Data of experiments-ESM1   File 1 Description: Batch experiments for degradation of dye wastewater in LaFeO3-RM/BS system     File 2 Name: YaoLi-Data of experiments-ESM2   File 2 Description: Intermediates measured by GC-MS     File 3 Name: YaoLi-Data of experiments-ESM3   File 3 Description: The leaching of metal ions measured by ICP-OES   DATA-SPECIFIC INFORMATION 1. Number of variables:7 2. Variable List: Absorbance: Measured by UV spectrophotometer removal rate: It is obtained by the calculation formula of the absorbance Retention time: Peak dwell times obtained by GC-MS S1: Leaching of the first measurement S2: Leaching of the second measurement S3: Leaching of the thrid measurement ppm: mg/l 3. Abbreviations used:   MB: methylene blue BS: bisulfite RM@LF: The catalyst LaFeO3-RM    ND: not detected