Monodisperse-porous Mn₅O₈ microspheres as an efficient catalyst for fast degradation of organic pollutants via peroxymonosulfate activation

Abstract

Monodisperse-porous Mn5O8 microspheres with multiple oxidation states, were used as an efficient heterogeneous catalyst for fast degradation of organic pollutants via peroxymonosulfate (PMS) activation. The presence of Mn(II), Mn(III), and...

In situ synthesis of CoFe-LDH on biochar for peroxymonosulfate activation toward sulfamethoxazole degradation: cooperation of radical and non-radical pathways

“…In general, TBA, p -BQ or l -AA and l -His or FFA can be utilized to quench ˙OH ( k 2 (TBA, ˙OH) = (3.8–7.6) × 10 7 M −1 s −1 ),O 2 ˙ − ( k 2 ( p -BQ, O 2 ˙ − ) = 2.9 × 10 9 M −1 s −1 ) and 1 O 2 ( k 2 (FFA, 1 O 2 ) = 1.2 × 10 8 M −1 s −1 , k 2 ( l -His, 1 O 2 ) = 3.2 × 10 7 M −1 s −1 ), respectively. 3,43–46 Moreover, MeOH is found to be capable of scavenging both ˙OH and SO 4 ˙ − with a reaction rate constant of 9.7 × 10 8 M −1 s −1 and 2.5 × 10 7 M −1 s −1 , respectively. 47 As shown in Fig.…”