Elemental composition of airborne aerosols at a traffic site and a suburban site in Hong Kong

Yan Cheng, Shuncheng Lee, Junji Cao, Kin Fai Ho, Judith C. Chow, John G. Watson, Chio Hang Ao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

11 Citations (Scopus)

Abstract

Forty elemental concentrations in different size particles were measured at a roadside site and a suburban site of Hong Kong using a ten-stage MOUDI impactor (Mode 110). Some elements (Cr, Fe, Co, Cu, As and Ba) have clear spatial variability, with ∼100% higher concentrations in roadside atmosphere than in suburban atmosphere, showing obviously vehicle-related sources for those elements. However, it is contrary for three typical sea salt elements (Na, Cl and Br), showing more than 100% higher concentrations in suburban environment than in roadside environment, which is due to the influence of marine aerosols. The size distributions of elements are generally similar between roadside and suburban site. The elements Na, Mg, Al, Si, Cl, Ca, Ti, Mn and Fe mainly present in coarse mode (10 μm > diameter > 1 μm). The mass concentrations of K, V and Ni are distributed in both fine (diameter > 1 μm) and coarse mode. The size distributions of S, Pb, As, Se, Zn, Cu, Cd and Ba show a single peak at around 1 μm or less. The contributions of mineral dust to Total Suspended Particles (TSP) are similar for the traffic and suburban site, ∼13.8% and ∼14.2%, respectively. Sea salts account for ∼1.6% of TSP for the traffic site, and ∼6.0% for the suburban site.
Original languageEnglish
Pages (from-to)166-179
Number of pages14
JournalInternational Journal of Environment and Pollution
Volume36
Issue number1-3
Publication statusPublished - 1 Jan 2009

Keywords

  • Element
  • Hong kong
  • Mineral dust
  • Sea salts
  • Size distribution

ASJC Scopus subject areas

  • Waste Management and Disposal
  • Pollution
  • Management, Monitoring, Policy and Law

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