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September 10, 2025Environmental Science & Technology

Unraveling the Spatiotemporal Heterogeneity in the Oxidation Potential of Fine Particulate Matter in China

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Authors

YWY. WangGCGuochao ChenTLTing Liu

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Overview

Observational analysis reveals changes in oxidative potential and PM2.5 trends in China, highlighting urban-rural exposure disparities.

Key Points

  • The oxidative potential of fine particulate matter shows complex trends, with a 16% decline in OP versus a 37% decline in PM2.5 since 2012.
  • A national database from 2000 to 2020 establishes distinct source contributions, showing ASOA contributed to 68% of OP increases before 2012.
  • Source apportionment during 2012-2017 indicates reductions in emissions from transportation and power generation influenced OP declines.
  • Differences in OP exposure between urban and rural areas are more pronounced than for PM2.5 mass concentrations, due to varied emission sources.

Cite This Study

Wang et al. (2025) studied this question.

synapsesocial.com/papers/68c1cc2e54b1d3bfb60f4255https://doi.org/10.1021/acs.est.5c03133
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