▎ 摘　　要

Recently, peroxymonosulfate-based advanced oxidation process has been widely applied in the removal of refractory organic pollutants. In the present study, cobalt-doped graphene aerogel (Co-GA) composites have been fabricated as a promising activator for peroxymonosulfate (PMS) via in-situ synthesis successfully. The physical-chemical properties of composite catalysts were carefully characterized and the activation performance was evaluated by the degradation of sulfamonomethoxine (SMM), ciprofloxacin (CIP), sulfanilamide (SN) and rhodamine B (RhB) aqueous solution, respectively. The results showed that Co-GA could effectively degrade refractory organics and keep macroscopic morphology intact under the reaction conditions of 15 mg/L simulated wastewater, 0.3 g/L PMS, 0.2 g/L Co-GA. Furthermore, the effect of reaction parameters on SMM degradation was investigated. Co-GA/PMS system exhibited consistent performance over a wide pH range (3-11). The degradation mechanism of SMM is free radical oxidation dominated by sulfate radical (SO4 center dot-) combined with non-radical reaction initiated by GA. Benefiting from its flexibility and recyclability, the as-prepared Co-GA is suitable for practical wastewater purification.