A photocatalytic composite material, photocatalytic-biological synergistic degradation system and method
By loading BiOCl nanosheets and nitrogen-doped carbon quantum dots onto a biochar matrix in a hierarchical porous structure, and combining it with a photocatalytic-biological synergistic degradation system, the problems of insufficient adsorption-catalytic synergy and low biological treatment efficiency in sulfadiazine wastewater treatment were solved, achieving efficient and stable wastewater treatment results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SINOPHARM CHONGQING PHARMA & MEDICAL IND DESIGN INST
- Filing Date
- 2026-04-30
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, the treatment of sulfadiazine wastewater suffers from problems such as easy aggregation of photocatalytic materials, single pore size of biological carbon carriers, and slow mass transfer, resulting in insufficient adsorption-catalysis synergy, low sulfadiazine removal rate, and slow degradation rate. In biological treatment, antibiotics are highly toxic, traditional activated sludge methods are inefficient, bacterial agents have poor stability, and photocatalytic residual toxicity inhibits subsequent reactions. Synergistic technologies lack functional integration at the material level, resulting in low mass transfer efficiency, large equipment footprint, and poor material circulation stability.
BiOCl nanosheets and nitrogen-doped carbon quantum dots are loaded onto a biochar matrix to form a hierarchical porous structure. Combined with a photocatalytic-biological synergistic degradation system, efficient treatment is achieved through macroporous mass transfer, mesoporous adsorption, photocatalytic detoxification, pH adjustment, biodegradation, and byproduct adsorption.
It improves wastewater treatment capacity, with sulfadiazine degradation rate >90%, COD removal rate 78-92%, total nitrogen removal rate 75-80%, metabolic by-product removal rate >85%, bacterial agent activity retention rate >80%, and extends bacterial agent activity half-life, significantly improving degradation efficiency and stability.
Smart Images
Figure CN122399862A_ABST