Photoinitiated Degradation Kinetics of the Organic UV Filter Oxybenzone in Solutions and Aerosols: Impacts of Salt, Photosensitizers, and the Medium.

ABSTRACT: Organic UV filters like oxybenzone (BP3) in sunscreens are seawater pollutants suspected to transfer to the atmosphere via sea spray aerosol (SSA). This study examines the photoinitiated degradation of BP3 in artificial and real seawater compared to SSA mimics containing NaCl and 4-benzoylbenzoic acid (4-BBA). We investigated pure, binary, and ternary mixtures of BP3, NaCl, and 4-BBA using solar-simulated light to isolate the effects of salt and photosensitization on BP3 degradation. Results showed significantly faster degradation in the aerosol phase (J _eff,env ≈ 10^-3-10^-2 s^-1 or t _1/2 < 10 min) compared to bulk solutions (J _eff,env ≈ 10^-6 s^-1 or t _1/2 > 1 day). T

SUBMITTER: Cooper A 

PROVIDER: S-EPMC11555681 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature