羟胺强化流通式电芬顿降解邻苯二甲酸二甲酯的效能和促进机制OA

The Electro-Fenton(EF)process represents a significant advancement in Fenton reaction technology,effectively addressing the inherent risks of H2O2 transportation and storage in traditional Fenton systems while minimizing iron sludge generation.A flow-through EF system incorporating hydroxylamine sulfate as a selective ligand for Fe3+was developed.Hydroxylamine exhibited selectivity toward Fe³⁺ while leveraging its reducing properties to promote the Fe³⁺/Fe²⁺cycle,thereby enhancing DMP degradation efficiency.The promoting mechanism of hydroxylamine in DMP degradation within the flow-through electro-Fenton system was also explored.The investigations revealed that the introduction of hydroxylamine into a circulating electro-Fenton system achieved 90％Fe3+-to-Fe2+conversion efficiency,reduced iron dosage to 20 µmol‧L-1 and extended operational pH range to 3-7.In addition,the system maintained stable degradation efficiency across 20 operational cycles under interference from NO3-,Cl-,PO43-and humic acid,and demonstrated versatile plasticizer degradation capabilities.Thus,a novel strategy for optimizing homogeneous flow-through EF systems was provided.