Hydroxyl radical scavenging by solid mineral surfaces in oxidative treatment systems: Rate constants and implications.

ABSTRACT: Advanced oxidation treatment processes used in various applications to treat contaminated soil, water, and groundwater involve powerful radical intermediates, including hydroxyl radicals (•OH). Inefficiency in •OH-driven treatment systems involves scavenging reactions where •OH react with non-target species in the aqueous and solid phases. Here, •OH were generated in iron (Fe)- and UV-activated hydrogen peroxide (Fe-AHP, UV-AHP) systems where the loss of rhodamine B served as a quantitative metric for •OH activity. Kinetic analysis methods were developed to estimate the specific •OH surface scavenging rate constant (k_≡S). In the Fe-AHP system, k_≡S for silica (2.85 × 10⁶ 1/m² × s) and alumina (3.92 × 10⁶ 1/m² × s) were simila

SUBMITTER: Rusevova Crincoli K 

PROVIDER: S-EPMC7530771 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature