The reusability of the ZnO@N-doped C for the adsorption and photodegradation of MeB and the concentration of FLU decreased after adsorption to 70%, 70%, 68%, and 92 % alongside cycles 1-4, respectively. The ZnO@N-doped C was efficient for the adsorption of MeB dye, and the reuse of the catalyst would reduce the adsorption efficiency. Also, the adsorption efficiency of the reused catalyst towards FLU decreased to some extent. The decrease in the adsorption efficiency is due to reducing the active sites in the reused catalyst. Of course, this removal of MeB was sufficient after adsorption and degradation alongside the four cycles. The removal approach was > 96% alongside four cycles. The reused catalyst was not sufficient in photodegradation of FLU, and the removal efficiencies along sides four cycles were 96.1%, 72.1%, 57.0%, and 34.9%, respectively.