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June 27, 2026Scientific ReportsOpen Access

Size-segregated airborne polycyclic aromatic hydrocarbons down to PM0.1 in urban tropical environment: spatial distribution, health risk assessment, and potential sources

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Authors

SPSiwatt PongpiachanDTDanai TipmaneeWDWoranuch Deelaman

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Overview

Randomized trial investigates health risks associated with PAH exposure in urban environments, indicating significant health implications from ultrafine particles.

Key Points

  • This study aims to assess the spatial distribution and health risks of size-segregated PAHs in urban tropical environments.
  • Collected particulate-bound PAHs from PM 10 , PM 2.5 , PM 1.0 , PM 0.5 , and PM 0.1 across five sites in Thailand.
  • Utilized hierarchical cluster analysis, principal component analysis, and positive matrix factorization for source identification.
  • Conducted lifetime lung cancer risk assessments based on particle size.],
  • PM 0.1 showed the highest concentration of carcinogenic PAH congeners, contributing to significant health risks.
  • Lifetime lung cancer risk assessments reached approximately 10 −4 in PM 0.1 critically impacted areas.
  • Traffic emissions were identified as the main source of PAHs across all size fractions, compounded by biomass burning during transport events.

Cite This Study

Pongpiachan et al. (2026) studied this question.

synapsesocial.com/papers/6a3f6922aea7db3c1953ff76https://doi.org/10.1038/s41598-026-58270-y
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