Semi-volatile components of PM_2.5 in an urban environment: volatility profiles and associated oxidative potential.

ABSTRACT: The volatility profiles of PM_2.5 semi-volatile compounds and relationships to the oxidative potential of urban airborne particles were investigated in central Los Angeles, CA. Ambient and thermodenuded fine (PM_2.5) particles were collected during both warm and cold seasons by employing the Versatile Aerosol Concentration Enrichment System (VACES) combined with a thermodenuder. When operated at 50 °C and 100 °C, the VACES/thermodenuder system removed about 50% and 75% of the PM_2.5 volume concentration, respectively. Most of the quantified PM_2.5 semi-volatile species including organic carbon (OC), water soluble organic carbon (WSOC), polycyclic aromatic hydrocarbons (PAHs), organic acids, n-alkanes, and levoglucosan, as well as inorganic ions (i.e.

SUBMITTER: Pirhadi M 

PROVIDER: S-EPMC7311065 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature