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Title: Seasonal Variation and Sources Estimation of PM2.5-Bound PAHs from the Ambient Air of Chiang Mai City: An All-year-round Study in 2017
Authors: Sawaeng Kawichai
Tippawan Prapamontol
Somporn Chantara
Tinakorn Kanyanee
Wan Wiriya
Yan - Lin Zhang
Keywords: air pollution
biomass burning
Issue Date: 2020
Publisher: Faculty of Science, Chiang Mai University
Citation: Chiang Mai Journal of Science 47,5 (Sep 2020), p.958-972
Abstract: This study investigated PM2.5-bound polycyclic aromatic hydrocarbons (PAHs) concentration to estimate sources of air pollution in Chiang Mai City, Thailand. In this study, the ambient PM2.5 samples were collected from January to December 2017 in Chiang Mai City (18 47′ N, 98 57′ E). Sixteen PAHs that have been designated as high priority by the US EPA were analyzed using a gas chromatograph (Model 7890A, Agilent) equipped with a mass spectrometer detector (Model 5975C). The PM2.5 concentrations could be classified into two periods by using active fire data (or so-called number of hotspots) detected by Moderate Resolution Imaging Spectroradiometer, a type of remote satellite sensing imaging. The first period took place from January to May, as a result of high biomass burning (HBB; n=62) and the second period occurred from June to December due to low biomass burning (LBB; n = 58). In both periods there was a significant difference between the 24-hour mean concentrations of PM2.5 ranging from 6.07 - 79.9 μg/m3 with a mean SD of 35.8 16.3 μg/m3 for the HBB period and 7.71 - 53.4 μg/m3 with a meaSD of 24.6 10.4 μg/m3 for the LBB period. Meanwhile, the mean concentrations of the 16 PAHs in the HBB period were significantly higher than those in the LBB period
Description: The Chiang Mai Journal of Science is an international English language peer-reviewed journal which is published in open access electronic format 6 times a year in January, March, May, July, September and November by the Faculty of Science, Chiang Mai University. Manuscripts in most areas of science are welcomed except in areas such as agriculture, engineering and medical science which are outside the scope of the Journal. Currently, we focus on manuscripts in biology, chemistry, physics, materials science and environmental science. Papers in mathematics statistics and computer science are also included but should be of an applied nature rather than purely theoretical. Manuscripts describing experiments on humans or animals are required to provide proof that all experiments have been carried out according to the ethical regulations of the respective institutional and/or governmental authorities and this should be clearly stated in the manuscript itself. The Editor reserves the right to reject manuscripts that fail to do so.
ISSN: 2465-3845
Appears in Collections:CMUL: Journal Articles

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