Characterization of isoprene-derived secondary organic aerosols at a rural site in North China Plain with implications for anthropogenic pollution effects.

ABSTRACT: Isoprene is the most abundant non-methane volatile organic compound (VOC) and the largest contributor to secondary organic aerosol (SOA) burden on a global scale. In order to examine the influence of high concentrations of anthropogenic pollutants on isoprene-derived SOA (SOA _i ) formation, summertime PM_2.5 filter samples were collected with a three-hour sampling interval at a rural site in the North China Plain (NCP), and determined for SOA _i tracers and other chemical species. RO₂+NO pathway derived 2-methylglyceric acid presented a relatively higher contribution to the SOA _i due to the high-NOx (~20 ppb) conditions in the NCP that suppressed the reactive uptake of RO₂+HO₂ reaction derived isoprene epoxydiols. C

SUBMITTER: Li J 

PROVIDER: S-EPMC5765163 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature