Measurement report: Oxidation potential of water-soluble aerosol components in the south and north of Beijing DOI Creative Commons
Wei Yuan, Ru‐Jin Huang, Chao Luo

et al.

Atmospheric chemistry and physics, Journal Year: 2024, Volume and Issue: 24(23), P. 13219 - 13230

Published: Nov. 29, 2024

Abstract. Water-soluble components significantly contribute to the oxidative potential (OP) of atmospheric fine particles (PM2.5), but our understanding water-soluble PM2.5 OP and its sources, as well relationship with components, is still limited. In this study, levels in wintertime south north Beijing, representing difference were measured dithiothreitol (DTT) assay. The volume-normalized DTT (DTTv) (3.5±1.2 nmol min−1 m−3) was comparable that (3.9±0.9 m−3), while mass-normalized (DTTm) (65±28 pmol µg−3) almost twice (36±14 µg−3). both DTTv better correlated soluble elements instead total elements. north, (mainly Mn, Co, Ni, Zn, As, Cd Pb) organic compounds, especially light-absorbing compounds (also known brown carbon), had positive correlations DTTv. However, south, mainly related Fe Pb. sources further resolved using matrix factorization (PMF) model. Traffic-related emissions (39 %) biomass burning (25 main traffic-related (>50 contributed most north. Our results indicate vehicle emission an important contributor Beijing ambient suggest more study needed understand intrinsic between compounds.

Language: Английский

Measurement report: Oxidation potential of water-soluble aerosol components in the south and north of Beijing DOI Creative Commons
Wei Yuan, Ru‐Jin Huang, Chao Luo

et al.

Atmospheric chemistry and physics, Journal Year: 2024, Volume and Issue: 24(23), P. 13219 - 13230

Published: Nov. 29, 2024

Abstract. Water-soluble components significantly contribute to the oxidative potential (OP) of atmospheric fine particles (PM2.5), but our understanding water-soluble PM2.5 OP and its sources, as well relationship with components, is still limited. In this study, levels in wintertime south north Beijing, representing difference were measured dithiothreitol (DTT) assay. The volume-normalized DTT (DTTv) (3.5±1.2 nmol min−1 m−3) was comparable that (3.9±0.9 m−3), while mass-normalized (DTTm) (65±28 pmol µg−3) almost twice (36±14 µg−3). both DTTv better correlated soluble elements instead total elements. north, (mainly Mn, Co, Ni, Zn, As, Cd Pb) organic compounds, especially light-absorbing compounds (also known brown carbon), had positive correlations DTTv. However, south, mainly related Fe Pb. sources further resolved using matrix factorization (PMF) model. Traffic-related emissions (39 %) biomass burning (25 main traffic-related (>50 contributed most north. Our results indicate vehicle emission an important contributor Beijing ambient suggest more study needed understand intrinsic between compounds.

Language: Английский

Citations

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