Investigation of the mechanism of phytate-modified biochar-catalyzed persulfate degradation of Ponceau 2R

Abstract The mechanism of oxidation and degradation effect phytate-modified biochar catalyzed persulfate on Ponceau 2R was investigated. Chemical-structural properties biochar, such as surface morphology oxygen-containing functional groups were characterized. results suggest that modified has better performance than unmodified the generated at 500 ? pyrolysis temperature can catalyze peroxymonosulfate (PMS) system with high efficiency, in large pH scope. And by biochar-catalyzed PMS generation (BC-PMS) researched. It revealed PBC300 (phytate-modified pyrolyzed 300 °C), PBC500 PBC700 700 °C) may have metaphosphoric acid linked to oxygen atoms a bridging manner catalyzing production hydroxyl radicals PMS. catalyzes singlet through its structural defects, is main catalytic product PBC700.