Figure 4 Catalytic performance of SA-Cu-NC (A) BPA degradation in various systems. (B) Effect of PMS concentration on BPA degradation. (C) Effect of pH values on BPA degradation. (D) Degradation of different pollutants in the SA-Cu-NC+PMS system. Reaction conditions: [catalyst] = 0.04 g L −1 , [BPA] 0  = [2,4-DCP] 0  = [PhOH] 0  = [2-CP] 0  = [BA] 0  = [NB] 0  = [IBU] 0  = 50 μM (if any), [PMS] 0  = 1.0 mM, initial pH = 5.8 if not otherwise specified, Temp = 30°C.