The adsorption of the MeB and Flu mixture on ZnO@N-doped C was investigated. 50 mL of MeB (50 mg/L) and 50 mL of FLU (50 mg/L) were mixed, and 5 mg of ZnO@N-doped C was added to the mixture under stirring. The adsorption was investigated alongside four hours, where 5 mL of the reaction mixture was withdrawn at a given (t) reaction time. The catalyst was filtrated, and the UV-Vis spectra were collected using the UV-Vis spectrophotometer. The adsorption capacities were also investigated using 10 or 20 mg of ZnO@N-doped C. The photocatalytic degradation of residue was also investigated as previously described.