Hydroxyl radical generation in peroxymonocarbonate/Co²⁺ systems: kinetic and mechanistic insights.

ABSTRACT: This study investigates the generation of hydroxyl radicals (˙OH) in a peroxymonocarbonate (PMC)-based advanced oxidation process (AOP) catalyzed by Co²⁺. Steady-state ˙OH concentrations ([˙OH]_ss) were quantified using terephthalic acid (TA) as a probe. The presence of PMC alone had negligible effect on ˙OH production, whereas Co²⁺ markedly enhanced radical formation. Specifically, [˙OH]_ss increased from 4.03 × 10^-17 M in the H₂O₂-only system to 2.25 × 10^-16 M in H₂O₂ + Co²⁺, and from 2.26 × 10^-17 M in PMC-only to 3.38 × 10^-16 M in PMC/Co²⁺. This enhancement is attributed to a Fenton-like mechanism involving Co²⁺. Kinetic analy

SUBMITTER: Vu TT 

PROVIDER: S-EPMC12606412 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature