Exposure to PM2.5and PAHs from the Tong Liang, China epidemiological study

Judith C. Chow, John G. Watson, Lung Wen Antony Chen, Steven Sai Hang Ho, Darko Koracin, Barbara Zielinska, Deliang Tang, Frederica Perera, Junji Cao, Shuncheng Lee

Research output: Journal article publicationJournal articleAcademic researchpeer-review

41 Citations (Scopus)


Chemically speciated PM2.5and particle-bound polycyclic aromatic hydrocarbon (PAH) measurements were made at three sites near urban Tong Liang, Chongqing, a Chinese inland city where coal combustion is used for electricity generation and residential purposes outside of the central city. Ambient sampling was based on 72-hr averages between 3/2/2002 and 2/26/2003. Elevated PM2.5and PAH concentrations were observed at all three sites, with the highest concentrations found in winter and the lowest in summer. This reflects a coupling effect of source variability and meteorological conditions. The PM2.5mass estimated from sulfate, nitrate, ammonium, organics, elemental carbon, crustal material, and salt corresponded with the annual average gravimetric mass within ±10%. Carbonaceous aerosol was the dominant species, while positive correlations between organic carbon and trace elements (e.g., As, Se, Br, Pb, and Zn) were consistent with coal-burning and motor vehicle contributions. Ambient particle-bound PAHs of molecular weight 168-266 were enriched by 1.5 to 3.5 times during the coal-fired power plant operational period. However, further investigation is needed to determine the relative contribution from residential and utility coal combustion and vehicular activities.
Original languageEnglish
Pages (from-to)517-542
Number of pages26
JournalJournal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
Issue number4
Publication statusPublished - 1 Apr 2006


  • Carbonaceous aerosol
  • China
  • Coal
  • PAH
  • PM 2.5
  • Spatial distribution

ASJC Scopus subject areas

  • Environmental Engineering

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