Air Quality Analysis in the Selected Urban and Suburban Areas in Central Thailand by Compact and Useful PM2.5 Instrument with Gas Sensors (CUPI-G)

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Published: Aug 30, 2023
Keywords:
CUPI-G air pollution urban area suburban area Thailand

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Humm Kham Zan Zan Aung
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Suwanna Kipati Boontanon
Graduate Program in Environmental and Water Resources Engineering, Department of Civil and Environmental Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom 73170, Thailand
Jiaru Li
Graduate School of Global Environmental Studies, Kyoto University, Yoshida-Honmachi, Kyoto 606-8501, Japan
Yosuke Sakamoto
Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-Honmachi, Kyoto 606-8501, Japan
Narin Boontanon
Research Center and Technology, Development for Environmental Innovation, Faculty of Environment and Resource Studies, Mahidol University, Nakhon Pathom 73170, Thailand
Yoshizumi Kajii
Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-Honmachi, Kyoto 606-8501, Japan

Abstract

Air pollution is a major environmental issue in Asian developing nations because of its negative consequences. In Thailand, it is a serious problem, not only in metropolitan areas, but also throughout large areas of the country. Ratchathewi district was selected as an urban observation site due to its location, and Mueang Samut Sakhon district was chosen as a suitable suburban observation site with many small industries. The main objective of the study is to investigate the temporal variations and correlations in PM2.5 and trace pollutant gases in relation to the meteorological conditions at the urban and suburban sites during the observation period using the Compact and Useful PM2.5 Instrument with Gas Sensors (CUPI-G). The air quality observations were conducted for two weeks respectively from 11th to 25th February 2023 at the Ratchathewi site and from 14th to 28th November 2022 at the Mueang Samut Sakhon site using the CUPI-G. During the observations, air pollutant concentrations detected at the Ratchathewi site were in the range of 9.8-248.9 µg/m3 for PM2.5, 526.2-2221.2 ppb for CO, 20.9-1888.4 ppb for NO, 18.1-155.5 ppb for NO2, 27.4-213.5 ppb for Ox and 1.1-88.9 ppb for O3. At the Mueang Samut Sakhon site, they ranged from 3.4-172.5 µg/m3 for PM2.5, 426.5-989.9 ppb for CO, 10.4-321.5 ppb for NO, 6.8-95.3 ppb for NO2, 1.5-143.3 ppb for Ox and 5.3-57.7 ppb for O3. Compared with the ambient air quality standards for Thailand, the results showed that both sites experienced pollution from photochemical oxidants in addition to particulate matter. The CUPI-G showed that it was an applicable instrument for air quality observations in both urban suburban areas. Due to the different correlations between air pollutants in each area, additional research is necessary to address specific atmospheric patterns in order to tackle the air pollution issues in Thailand.

Article Details

Issue
Vol. 37 No. 2 (2023): May-August
Section
Research Articles

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