Decoding the Primacy of Transportation Emissions of Formaldehyde Pollution in an Urban Atmosphere.

ABSTRACT: Understanding the differential impacts of emission sources of volatile organic compounds (VOCs) on formaldehyde (HCHO) levels is pivotal to effectively mitigating key photochemical radical precursors, thereby enhancing the regulation of atmospheric oxidation capacity (AOC) and ozone formation. This investigation systematically selected and analyzed year-long VOC measurements across three urban zones in Shenzhen, China. Photochemical age correction methods were implemented to develop the initial concentrations of VOCs before source apportionment; then Positive Matrix Factorization (PMF) modeling resolved six primary sources: solvent usage (28.6-47.9%), vehicle exhaust (24.2-31.2%), biogenic emission (13.8-18.1%), natural gas (8.5-16.3%), gasoline evaporation (3.2-8.9%), and biomass burning

SUBMITTER: Liu SQ 

PROVIDER: S-EPMC12390000 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature