Composition and light absorption of N-containing aromatic compounds in organic aerosols from laboratory biomass burning.

ABSTRACT: This study seeks to understand the compositional details of N-containing aromatic compounds (NACs) emitted during biomass burning (BB) and their contribution to light-absorbing organic carbon (OC), also termed brown carbon (BrC). Three laboratory BB experiments were conducted with two U.S. pine forest understory fuels typical of those consumed during prescribed fires. During the experiments, submicron aerosol particles were collected on filter media and subsequently extracted with methanol and examined for their optical and chemical properties. Significant correlations (p < 0.05) were observed between BrC absorption and elemental carbon (EC)/OC ratios for individual burns data. However, the pooled experimental data indicated that the BB BrC absorption depends on more than the BB fir

SUBMITTER: Xie M 

PROVIDER: S-EPMC6733279 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature