Evolution of Singlet Oxygen by Activating Peroxydisulfate and Peroxymonosulfate: A Review.

Advanced oxidation processes (AOPs) based on peroxydisulfate (PDS) or peroxymonosulfate (PMS) activation have attracted much research attention in the last decade for the degradation of recalcitrant organic contaminants. Sulfate (SO) and hydroxyl (OH) radicals are most frequently generated from catalytic PDS/PMS decomposition by thermal, base, irradiation, transition metals and carbon materials. In addition, increasingly more recent studies have reported the involvement of singlet oxygen (O) during PDS/PMS-based AOPs.

Periodate activation with manganese oxides for sulfanilamide degradation.

This study presents a novel periodate oxidation system mediated by manganese oxides for the rapid removal of aqueous contaminants. The catalytic activation of periodate on manganese oxides was demonstrated as an efficient advanced oxidation system for degradation of sulfanilamide. The reactivity of manganese oxides with different Mn valence followed the order of MnO>MnO>MnO, all of which showed extraordinary reusability during repeated activation of periodate.