Polycyclic aromatic hydrocarbons (PAHs) in urban surface dust of Guangzhou, China: Status, sources and human health risk assessment

Wei Wang, Min juan Huang, Yuan Kang, Hong sheng Wang, Anna Oi Wah LEUNG, Kwai Chung Cheung, Ming Hung WONG*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

296 Citations (Scopus)

Abstract

Ninety-six urban surface dust samples collected from Guangzhou, a typical urban center in South China, were analyzed for 16 PAHs (2-6 rings). ∑PAHs concentrations in the urban surface dust ranged from 0.84 to 12.3 mu;g/g with a mean of 4.80μg/g. High molecular weight compounds (4-6 rings) contributed to 62 to 94% of ∑PAHs mass in the surface dust samples. Four hotspots with highest ∑PAHs were identified via kriging prediction mapping, representing the highly-urbanized regions: central downtown, highway and industrial area. Two major origins of PAHs inputs to urban surface dust were identified as vehicle emissions (51.9%) and coal combustion (26.8%). The 95% UCL of Incremental Lifetime Cancer Risk (ILCR) due to human exposure to urban surface dust PAHs in central South China was 3.03×10 -6 for children and 2.92×10 -6 for adults.

Original languageEnglish
Pages (from-to)4519-4527
Number of pages9
JournalScience of the Total Environment
Volume409
Issue number21
DOIs
Publication statusPublished - 1 Oct 2011

Scopus Subject Areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution

User-Defined Keywords

  • Composition profile
  • Health risk assessment
  • PAHs
  • Source analysis
  • Urban surface dust

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