Chemical characteristics and sources of PM2.5 in the urban environment of Seoul, Korea

Kang, Seok‐Won; Choi, Siyoung Q.; Ban, Jihee; Kim, Kyunghoon; Singh, Rahul; Park, Gyutae; Kim, Myeong-Bok; Yu, Dong-Gil; Kim, Joo-Ae; Kim, Sang‐Woo; Park, Moon-Soo; Kim, Cheol‐Hee; Lee, Meehye; Heo, Gookyoung; Jang, Yeonggul; Ha, Sang-Sub; Park, Taehyun; Lee, Taehyoung

doi:10.1016/j.apr.2022.101568

Cited by 12 publications

(1 citation statement)

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“…As a part of the Fine Particle Research Initiative in East Asia considering National Differences (FRIEND) project, which was launched in 2020 to investigate the mechanisms and characteristics of aerosol pollution in Northeast Asia, ,− we investigated the physicochemical properties of PM 2.5 in four different sites in Northeast Asia: Beijing (40.25° N, 116.19° E), Seoul (37.61° N, 126.93° E), Seosan (36.77° N, 126.49° E), and Ulaanbaatar (47.91° N, 106.94° E) (Figure S1). The measurement sites in Beijing, Seoul, and Ulaanbaatar are in urban environments, − whereas the site in Seosan is in a rural area. , Concurrent field measurements were conducted in these four cities with daily collection of PM 2.5 samples covering three seasons (winter, summer, and spring) between 2020 and 2022 (Tables S1 and S2, Figure S2). In total, 92 PM 2.5 filter samples were analyzed to determine their phase states.…”

Section: Methodsmentioning

confidence: 99%

Influence of Relative Humidity and Composition on PM_2.5 Phases in Northeast Asia

Seong,

Kim,

Jeong

et al. 2024

ACS Earth Space Chem.

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In Northeast Asia, the elevated levels of fine particulate matter (PM 2.5 ) are an environmental concern, yet their physicochemical properties have been poorly characterized. Herein, we determined the phase states of PM 2.5 in 92 filter samples collected from four different cities� Beijing, Seoul, Seosan, and Ulaanbaatar�during 2020−2022, within a temperature range of ∼290−293 K. We noted a distinct trend in the boundary relative humidity (RH) of liquid and semisolid phases within these PM 2.5 samples. As the inorganic fraction increased, the RH of the liquid phase decreased, whereas that of the semisolid phase increased. This behavior was strongly influenced by the chemical composition of PM 2.5 . By incorporating ambient RH data from each city, we estimated the prevalent PM 2.5 phase states within the planetary boundary layer of Northeast Asia. Our findings revealed that the dominant phase states of PM 2.5 in these urban areas were liquid and semisolid. Additionally, we showed a critical threshold based on the aerosol liquid water content (ALWC) in PM 2.5 : a primarily liquid phase for ALWC/PM 2.5 ratios of ≥∼0.5 and a predominantly semisolid phase for ALWC/PM 2.5 ratios of <∼0.5. These insights could contribute to a better understanding of the mechanisms underlying aerosol pollution in Northeast Asia.

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Section: Methodsmentioning

confidence: 99%

Influence of Relative Humidity and Composition on PM_2.5 Phases in Northeast Asia

Seong,

Kim,

Jeong

et al. 2024

ACS Earth Space Chem.

View full text Add to dashboard Cite

show abstract

Determination of Input variables for Artificial Intelligence Models to predict the High PM2.5 concentration events in Seoul, Korea

Kim

Park

2023

Asia-Pac J Atmos Sci

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Physicochemical Characteristics and Formation of PM2.5 in Yongin, Korea—A Suburban Metropolitan Area

Park,

Kang,

Kim

et al. 2024

Asia-Pac J Atmos Sci

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Chemical characteristics and sources of PM2.5 in the urban environment of Seoul, Korea

Cited by 12 publications

References 61 publications

Influence of Relative Humidity and Composition on PM_2.5 Phases in Northeast Asia

Influence of Relative Humidity and Composition on PM_2.5 Phases in Northeast Asia

Determination of Input variables for Artificial Intelligence Models to predict the High PM2.5 concentration events in Seoul, Korea

Physicochemical Characteristics and Formation of PM2.5 in Yongin, Korea—A Suburban Metropolitan Area

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Chemical characteristics and sources of PM2.5 in the urban environment of Seoul, Korea

Cited by 12 publications

References 61 publications

Influence of Relative Humidity and Composition on PM2.5 Phases in Northeast Asia

Influence of Relative Humidity and Composition on PM2.5 Phases in Northeast Asia

Determination of Input variables for Artificial Intelligence Models to predict the High PM2.5 concentration events in Seoul, Korea

Physicochemical Characteristics and Formation of PM2.5 in Yongin, Korea—A Suburban Metropolitan Area

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Influence of Relative Humidity and Composition on PM_2.5 Phases in Northeast Asia

Influence of Relative Humidity and Composition on PM_2.5 Phases in Northeast Asia