Method for degrading HEDP by anion-activated PMS and application thereof
An oxidation system constructed using sodium bicarbonate, bromide, and potassium persulfate degrades HEDP under mild conditions, solving the problems of high energy consumption and secondary pollution associated with traditional methods. This achieves efficient and economical HEDP degradation and phosphorus resource recovery.
Patent Information
- Application Number
- CN202610599706.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-30
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies are insufficient for the efficient removal of hydroxyethylidene diphosphonic acid (HEDP) from industrial wastewater. HEDP is chemically stable, and traditional activation methods are energy-intensive or may cause secondary pollution from metal ions. Bromine ion-activated PMS is not ideal for the degradation of HEDP.
A synergistic oxidation system was constructed using sodium bicarbonate and bromide to provide bromide and bicarbonate ions, along with potassium persulfate, to degrade HEDP under mild conditions. Seawater was used to replace part of the activator, and the reaction was carried out in a continuous flow reactor.
It achieves efficient, economical, and environmentally friendly HEDP degradation, with harmless byproducts, simple reaction conditions, and easy promotion and application. Furthermore, it can recover phosphorus resources by adjusting the generated struvite.
Smart Images
Figure CN122403670A_ABST