Characterization of organic nitrogen in aerosols at a forest site in the southern Appalachian Mountains.

ABSTRACT: This study investigates the composition of organic particulate matter in PM_2.5 in a remote montane forest in the southeastern US, focusing on the role of organic nitrogen (N) in sulfur-containing secondary organic aerosol (nitrooxy-organosulfates) and aerosols associated with biomass burning (nitro-aromatics). Bulk water-soluble organic N (WSON) represented ~ 14% w/w of water-soluble total N (WSTN) in PM_2.5 on average across seasonal measurement campaigns conducted in the spring, summer, and fall of 2015. The largest contributions of WSON to WSTN were observed in spring (~ 18% w/w) and the lowest in the fall (~ 10% w/w). On average, identified nitro-aromatic and nitrooxy-organosulfate compounds accounted for a small fraction of WSON, ranging from

SUBMITTER: Chen X 

PROVIDER: S-EPMC7377252 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature