Light Degrading Properties of Size-Fractionated PM10 Aerosol Samples Collected from an Industrial Area in Brisbane, Australia

Y C Chan; G H McTainsh; Rodney W Simpson; P D Vowles; D D Cohen; G M Bailey

doi:10.1080/02786820290038537

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Light Degrading Properties of Size-Fractionated PM10 Aerosol Samples Collected from an Industrial Area in Brisbane, Australia

Journal article

Peer reviewed

Light Degrading Properties of Size-Fractionated PM10 Aerosol Samples Collected from an Industrial Area in Brisbane, Australia

Y C Chan, G H McTainsh, Rodney W Simpson, P D Vowles, D D Cohen and G M Bailey

Aerosol Science and Technology, Vol.36(8), pp.890-898

2002

DOI: https://doi.org/10.1080/02786820290038537

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Abstract

PM10 aerosols

air quality

air pollution

Thirty-seven days of PM 10 aerosol samples (particles with aerodynamic diameter less than 10 m) were collected in an industrial area in Brisbane during April to June 1999 to study the light extinction efficiencies of urban aerosols in different size ranges. The light scattering coefficient of the air was measured by nephelometry. The light absorption coefficient of the aerosol samples was measured by the integrating plate laser absorption method. Multiple linear regression techniques were used to investigate the relationships between the visibility degrading properties and the chemical composition of the aerosol samples. The results are comparable with those from other visual air quality studies. The absorption of light by fine (PM 2.5 ) aerosols is mainly due to elemental carbon (EC) particles smaller than 0.5 m. The b 0 ap values of EC particles in different size ranges are 9.08 (less than 2.7 m) and 0.32 (2.7-10 m)m 2 g -1 , respectively. The absorption of light by coarse (PM 2.5-10 ) aerosols is mainly due to soil ( b 0 ap = 0.17) and organic ( b 0 ap = 1.11) particles. The scattering of light is highly related to the concentration of fine particles in the air (mass scattering efficiency b 0 sp = 1.65) and is mainly due to the fine sulphate ( b 0 sp = 10.9), soil ( b 0 sp = 2.73), and EC ( b 0 sp = 3.89) particles. On average, fine EC (44%), sulphate (20%) and soil (7%) particles, NO 2 (9%), and Rayleigh scattering (19%) were the largest contributors of visibility degradation for the sampling days in this study.

Details

Title: Light Degrading Properties of Size-Fractionated PM10 Aerosol Samples Collected from an Industrial Area in Brisbane, Australia
Authors: Y C Chan (Author) - Griffith University
G H McTainsh (Author) - Griffith University
Rodney W Simpson (Author) - University of the Sunshine Coast - Faculty of Science, Health and Education
P D Vowles (Author) - Griffith University
D D Cohen (Author) - Australian Nuclear Science and Technology Organisation
G M Bailey (Author) - Australian Nuclear Science and Technology Organisation
Publication details: Aerosol Science and Technology, Vol.36(8), pp.890-898
Publisher: Taylor & Francis Inc.
Date published: 2002
DOI: 10.1080/02786820290038537
ISSN: 0278-6826
Organisation Unit: University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99448897902621
Output Type: Journal article

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Web Of Science research areas: Engineering, Chemical; Engineering, Mechanical; Environmental Sciences; Meteorology & Atmospheric Sciences

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