Urban emissions of fine and ultrafine particulate matter in Los Angeles: Sources and variations in lung-deposited surface area.

ABSTRACT: Airborne particulate matter (PM) in urban environments poses significant health risks by penetrating the respiratory system, with concern over lung-deposited surface area (LDSA) as an indicator of particle exposure. This study aimed to investigate the diurnal trends and sources of LDSA, particle number concentration (PNC), elemental carbon (EC), and organic carbon (OC) concentrations in Los Angeles across different seasons to provide a comprehensive understanding of the contributions from primary and secondary sources of ultrafine particles (UFPs). Hourly measurements of PNC and LDSA were conducted using the DiSCmini and Scanning Mobility Particle Sizer (SMPS), while OC and EC concentrations were measured using the Sunset Lab EC/OC Monitor. The results showed distinct diurnal trends in PNC

SUBMITTER: Alramzi Y 

PROVIDER: S-EPMC11813679 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature