PH Affects the Spontaneous Formation of H₂O₂ at the Air-Water Interfaces.

ABSTRACT: Recent studies have shown that the air-water interface of aqueous microdroplets is a source of OH radicals and hydrogen peroxide in the atmosphere. Several parameters such as droplet size, salt, and organic content have been suggested to play key roles in the formation of these oxidants. In this study, we focus on the effect of acidity on the spontaneous interfacial hydrogen peroxide formation of salt-containing droplets. Na₂SO₄, NaCl, and NaBr bulk solutions, at the range of pH 4 to 9.5, were nebulized, using ultra high-purity N₂/O₂ (80%/20%), and H₂O₂ was measured in the collected droplets. All of the experiments were performed in T = 292 ± 1 K and humidity levels of 90 ± 2%. For Na₂SO₄ and NaC

SUBMITTER: Angelaki M 

PROVIDER: S-EPMC11440490 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature