Top-down versus bottom-up oxidation of a neonicotinoid pesticide by OH radicals.

ABSTRACT: Emerging contaminants (EC) distributed on surfaces in the environment can be oxidized by gas phase species (top-down) or by oxidants generated by the underlying substrate (bottom-up). One class of EC is the neonicotinoid (NN) pesticides that are widely distributed in air, water, and on plant and soil surfaces as well as on airborne dust and building materials. This study investigates the OH oxidation of the systemic NN pesticide acetamiprid (ACM) at room temperature. ACM on particles and as thin films on solid substrates were oxidized by OH radicals either from the gas phase or from an underlying TiO₂ or NaNO₂ substrate, and for comparison, in the aqueous phase. The site of OH attack is both the secondary >CH₂ group as well as the primary -CH₃ gr

SUBMITTER: Wang X 

PROVIDER: S-EPMC10873643 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature