(A) Cell viability of THP-1 under different concentrations of SAMCC0.5. Cell culture time: 48 h. The concentration of viable cells with 0.5 mg/mL 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) as inspection agent and cells in the culture medium were observed under a microscope. (B) Cell viability of THP-1 under different concentrations of CoCl2. Cell culture time: 48 h. (C) Long-term degradation tests of totally 600 mg L−1 phenol with 300 mg L−1 SAMCC0.5, 300 mg L−1 Co–N–C, and 30 times equivalent CoCl2 as catalyst. Dosage: PMS: 200 mg L−1 every round, phenol: 20 mg L−1 every round, aqueous solution: 100 mL. (D) Degradation rate of different model pollutants in the SAMCC0.5–PMS system. Dosage: catalyst: 300 mg L−1PMS: 200 mg L−1, aqueous solution: 100 mL, reaction time: 30 min, model pollutants: 20 mg L−1.