Temperature effect on phase state and reactivity controls atmospheric multiphase chemistry and transport of PAHs.

ABSTRACT: Polycyclic aromatic hydrocarbons like benzo(a)pyrene (BaP) in atmospheric particulate matter pose a threat to human health because of their high carcinogenicity. In the atmosphere, BaP is mainly degraded through a multiphase reaction with ozone, but the fate and atmospheric transport of BaP are poorly characterized. Earlier modeling studies used reaction rate coefficients determined in laboratory experiments at room temperature, which may overestimate/underestimate degradation rates when applied under atmospheric conditions. Moreover, the effects of diffusion on the particle bulk are not well constrained, leading to large discrepancies between model results and observations. We show how regional and global distributions and transport of BaP can be explained by a new kinetic scheme t

SUBMITTER: Mu Q 

PROVIDER: S-EPMC5943057 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature