Comoo4Sponge as a Novel Catalyst for Peroxymonosulfate(Pms) Activation To Efficiently Degrade Sulfadimethoxine

Due to synergy effect, bimetallic oxides used as catalysts for the activation of peroxymonosulfate (PMS) to eliminate organic contaminants have been widely investigated. However, the difficulty in catalyst separation from water in the practical field greatly limit their application. In the present study, CoMoO 4 was fabricated and attached to melamine sponge to elimination of sulfadimethoxine (SDM) through activating PMS, which greatly simplified its separation and recycling operation. Various characterization technologies and experimental designs were performed to investigate the physicochemical properties and catalytic performance of CoMoO 4 @sponge material. Over 98% of SDM (30 mg/L) was degraded by both CoMoO 4 @sponge and PMS within 10 min. CoMoO 4 @sponge also showed extremely excellent stability and reusability. Within 10 min, approximately 98% of SDM was degraded from the first to the third cycle. Even in the forth and fifth cycles, more than 90% of SDM were still decomposed. In addition, the system of CoMoO 4 @sponge/PMS possessed the strong anti-interference ability and no obvious decline of SDM degradation was observed in a actual water environment as compared to control. SO 4 •− , •OH and 1 O 2 was confirmed to be responsible for the SDM degradation. With the help of the determination of the intermediate products of SDM degradation via HPLC-TOF-MS 2 , the possible paths of the SDM degradation were inferred. This study may provide a new strategy to fabricate the catalysts with excellent catalytic performance and simple separation for PMS activation to remove organic pollutants from water