Characterization of ambient aerosols in Northern Thailand and their probable sources

The present study examines variation of ambient aerosol mass and number concentrations in Chiang Mai, Thailand during winter. Aerosol particle samples were collected and measured at four different sites, representative of urban, industrial, residential and rural areas during daytime between December...

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Main Authors: Tippayawong N., Pengchai P., Lee A.
Format: Article
Language:English
Published: 2014
Online Access:http://www.scopus.com/inward/record.url?eid=2-s2.0-33751011058&partnerID=40&md5=721f950dec7c3da4f83f5aec00a7e5c6
http://cmuir.cmu.ac.th/handle/6653943832/1306
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-13062014-08-29T09:29:07Z Characterization of ambient aerosols in Northern Thailand and their probable sources Tippayawong N. Pengchai P. Lee A. The present study examines variation of ambient aerosol mass and number concentrations in Chiang Mai, Thailand during winter. Aerosol particle samples were collected and measured at four different sites, representative of urban, industrial, residential and rural areas during daytime between December 2003 and January 2004. Average 10 h particulate matter (PM) mass concentrations were found to be in the range of 75-290 μg/m3, with average value of 149 ± 45 μg/m3. Urban and industrial areas appeared to have higher PM loading than residential and rural areas. Number concentration and size distribution of particles in the range of 0.3-10.0 μm did not exhibit any marked variation between sites. Relatively stable number concentrations were reported. Temporal variation of number concentrations was not clearly significant. No short term peak observed during rush hours. During sampling period, the average number concentration for 0.3-0.5, 0.5-1.0, 1.0-5.0 and 5.0-10.0 μm were 6.60 × 106, 1.18 × 106, 2.11 × 105 and 1.12 × 104/m3, respectively. Particles with diameter smaller than 1.0 μm accounted for over 90 % of the total number concentration. Concentrations of major metals were determined by atomic absorption spectrophotometer (Pb, Fe, Al, Si, Cr, Cd, Ni, Zn) and flame photometer (K, Na and Ca). Data obtained were used to identify probable sources via a multivariate analysis. Si, Na, Fe, Ca, Al and K were the six dominant elements in the airborne PM. Principle component analysis was carried out and major sources of airborne PM in Chiang Mai were determined, namely, (1) long distance sources such as sea spray, earth soil and industrial combustion, (2) short-distance sources such as crustal re-suspension, vehicular related emissions and vegetation burning, and (3) the unknown distance sources with low influence of traffic emissions. © Autumn 2006, IRSEN, CEERS, IAU. 2014-08-29T09:29:07Z 2014-08-29T09:29:07Z 2006 Article 17351472 http://www.scopus.com/inward/record.url?eid=2-s2.0-33751011058&partnerID=40&md5=721f950dec7c3da4f83f5aec00a7e5c6 http://cmuir.cmu.ac.th/handle/6653943832/1306 English
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
language English
description The present study examines variation of ambient aerosol mass and number concentrations in Chiang Mai, Thailand during winter. Aerosol particle samples were collected and measured at four different sites, representative of urban, industrial, residential and rural areas during daytime between December 2003 and January 2004. Average 10 h particulate matter (PM) mass concentrations were found to be in the range of 75-290 μg/m3, with average value of 149 ± 45 μg/m3. Urban and industrial areas appeared to have higher PM loading than residential and rural areas. Number concentration and size distribution of particles in the range of 0.3-10.0 μm did not exhibit any marked variation between sites. Relatively stable number concentrations were reported. Temporal variation of number concentrations was not clearly significant. No short term peak observed during rush hours. During sampling period, the average number concentration for 0.3-0.5, 0.5-1.0, 1.0-5.0 and 5.0-10.0 μm were 6.60 × 106, 1.18 × 106, 2.11 × 105 and 1.12 × 104/m3, respectively. Particles with diameter smaller than 1.0 μm accounted for over 90 % of the total number concentration. Concentrations of major metals were determined by atomic absorption spectrophotometer (Pb, Fe, Al, Si, Cr, Cd, Ni, Zn) and flame photometer (K, Na and Ca). Data obtained were used to identify probable sources via a multivariate analysis. Si, Na, Fe, Ca, Al and K were the six dominant elements in the airborne PM. Principle component analysis was carried out and major sources of airborne PM in Chiang Mai were determined, namely, (1) long distance sources such as sea spray, earth soil and industrial combustion, (2) short-distance sources such as crustal re-suspension, vehicular related emissions and vegetation burning, and (3) the unknown distance sources with low influence of traffic emissions. © Autumn 2006, IRSEN, CEERS, IAU.
format Article
author Tippayawong N.
Pengchai P.
Lee A.
spellingShingle Tippayawong N.
Pengchai P.
Lee A.
Characterization of ambient aerosols in Northern Thailand and their probable sources
author_facet Tippayawong N.
Pengchai P.
Lee A.
author_sort Tippayawong N.
title Characterization of ambient aerosols in Northern Thailand and their probable sources
title_short Characterization of ambient aerosols in Northern Thailand and their probable sources
title_full Characterization of ambient aerosols in Northern Thailand and their probable sources
title_fullStr Characterization of ambient aerosols in Northern Thailand and their probable sources
title_full_unstemmed Characterization of ambient aerosols in Northern Thailand and their probable sources
title_sort characterization of ambient aerosols in northern thailand and their probable sources
publishDate 2014
url http://www.scopus.com/inward/record.url?eid=2-s2.0-33751011058&partnerID=40&md5=721f950dec7c3da4f83f5aec00a7e5c6
http://cmuir.cmu.ac.th/handle/6653943832/1306
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