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This study examines variations in PM2.5 mass, chemical composition, and oxidative potential (OP) at Gwanghwamun Square, Seoul, using intensive 3-h integrated sampling campaigns performed in September 2020 and 2022. The mean PM2.5 concentrations declined significantly from 20.66 µg/m3 in 2020 to 12.04 µg/m3 in 2022, indicating a 42% reduction in overall particle mass. Despite this progress, the mass-normalized oxidative potential (DTTm) remained statistically unchanged (0.04 ± 0.04 vs. 0.03 ± 0.05 µM/µg, showing that particle toxicity per unit mass did not decrease. However, organic aerosol components exhibited marked increases in 2022. Organic carbon (OC) and water-soluble organic carbon (WSOC) increased by 22% and 82%, respectively, and primary organic carbon (POC) experienced more than a twofold rise. Levoglucosan (LEVO) concentrations grew by 37%, especially during nighttime periods, and the levoglucosan-to-POC ratio (LEVO/POC) surpassed 35 × 10− 3 µg/µg at night, providing clear evidence of intensified biomass burning contributions. Annual flammable waste wood generation increased substantially in 2022, further supporting the conclusion that nighttime waste wood combustion contributed to higher organic aerosol levels and persistent OP values. These findings emphasize that reducing PM2.5 mass alone is inadequate; targeted interventions to control nighttime biomass burning are essential for lowering health-relevant aerosol toxicity in urban Seoul.

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기사명 저자명 페이지 원문 목차
Numerical analysis of collision mechanism that causes particle tribocharging in dry powder inhaler Ryosuke Mitani, Muhammad Aiman bin Mohd Nor, Takuto Iinuma, Tatsuhiro Mori, Tomoaki Okuda p. 1-16
Numerical analysis of factors causing long-term trends and annual variations of sulfur and nitrogen deposition amount in Japan from 2000 to 2020 Satoru Chatani, Hikari Shimadera, Kyo Kitayama, Kazuya Nishina p. 1-15
Analysis of the National Air Pollutant Emissions Inventory (2021) in the Republic of Korea Jeongpil Jang, Eunmi Han, Jinha Heo, Suah Choi, Jihoon Park, Kang-San Lee, Jongmin Joo, Hyeongdo Song, Chul Yoo p. 1-14
Analysis of national air pollutant emissions in 2020 and re-estimation results for emissions from past years (2016–2019) Seongwoo Choi, Dongjae Lee, Yera Choi, Kwonhee Choi, Eunji Shin, Hyungcheon Kim, Myeonggeun Cha, Hyeongdo Song, Chul Yoo p. 1-29
Integration of remote and in situ optical techniques to estimate fine dust and gaseous emissions in an industrial complex in South Korea Naghmeh Dehkhoda, Juhyeon Sim, Juseon Shin, Sohee Joo, Youngmin Noh, Dukhyeon Kim p. 1-19
Impact of typical days on the optical and microphysical parameters of aerosols in urban zone of Burkina Faso, West Africa Nébon Bado, Eric Korsaga, Boureima Dianda, Mamadou Simina Dramé, Bruno Korgo, Florent Pèlèga Kieno p. 1-10
Human health risk evaluation of particle air pollution (PM10 and PM2.5) and heavy metals in Dakar's two urban areas Moustapha Kebe, Alassane Traore, Malick Sow, Saliou Fall, Mounia Tahri p. 1-17
Optical properties of brown carbon aerosols in Dhaka’s atmosphere : evaluating climate forcing potential Asfay Raihan, Md Safiqul Islam, Samiha Nahian, Abdus Salam p. 1-9
Investigation on heterogeneous reactions of reactive oxidized nitrogen species with urban particles using iodide-chemical ionization mass spectrometry Satoshi Inomata, Hiroshi Tanimoto, Yasuhiro Sadanaga p. 1-8
Developing PM2.5 mitigation solutions based on the analysis of the relationships between PM2.5 concentrations and precursor factors : a case study of Hanoi, Vietnam Long Ta Bui, Binh Quoc Pham, Tho Thi Be Cao p. 1-16
Spatiotemporal distribution characterization and source estimation of PM2.5 components in the Ulsan Industrial Complex Young-hyun Kim, Shin-young Park, Hyeok Jang, Cheol-Min Lee p. 1-17
Effect of low-dose radiation from the Fukushima Daiichi Nuclear Power Plant accident on cherry blossom pollen formation Nobuyoshi Nakajima, Kazuhiko Kobayashi, Masanori Tamaoki, Mitsuko Aono p. 1-10
Neighborhood-level contamination and risks of child morbidity and mortality in Afghanistan Qurban Aliyar, Heman Das Lohano p. 1-11
Aggregate risk assessment of VOCs exposure in residents near Busan’s Sinpyeong and Jangrim industrial complexes Ji-Yun Jung, Jong-Won Kim, Tae-Woo Koo, Joon-Young Heo, Cheol-Min Lee p. 1-16
Temporal and seasonal variations in the frequency of high-concentration precipitation samples at EANET sites in Japan : 20 years of daily wet deposition data Yuhei Kato, Tsuyoshi Ohizumi, Makoto Nakata, Hiroyuki Sase p. 1-15
Seasonal variation and temperature-dependent emission of volatile organic compounds from a commercial swine shed in Japan Nobuyuki Tanaka, Kaho Nishimura, Akane Miyazaki, Hiroshi Hayami p. 1-10
Microplastics and health hazards : gastrointestinal risk assessment across a multi-species perspective Shiv Basant Kumar, Jey Kumar Pachiyappan, Sudharsanavasan Chandrasekar, Veera Venkata Satyanarayana Reddy Karri, Praveen Thaggikuppe Krishnamurthy, Jawahar Natarajan, Thava Palaniami, Gowthamarajan Kuppusamy p. 1-17
Black carbon and its radiative effect with role in urban heat island (UHI) over India : a review Sunayana, Nahar Singh, Papiya Mandal p. 1-23
(A) new hybrid multivariate prediction model based on wavelet transform convolution for PM2.5 prediction Xinbiao Lu, Wentao Zhang, Gaofan Zhan, Wen Wu, Changjiang Han, Xiaolong Wu p. 1-15
Peroxide concentrations measured over a rural site in the Hokuriku district, coastal region of the Sea of Japan, central Japan, during early summer using a helicopter Koichi Watanabe, Nanami Maki, Michiyo Chatani, Chisato Maki, Ayami Nakanishi, Yuki Wasada, Taisei Akahori, Ryoga Ono, Yuta Yamazaki, Chiharu Mori p. 1-9
Comparative analysis of polycyclic aromatic sulfur heterocycles (PASHs) in PM2.5 from Xi’an, China and Yokohama, Japan : pollution characteristics and source attribution Kaixu Chen, Weidong Jing, Zhenxing Shen, Tomoaki Okuda p. 1-17
Nighttime waste wood burning and its impact on urban air quality : multi-year measurements in central Seoul, Gwanghwamun, South Korea Chaehyeong Park, Seoyeong Choe, Min Young Song, SungKyun Shin, Hajeong Jeon, Dong-Hoon Ko, Myoungki Song, Min-Suk Bae p. 22-22
Catalytic role of atmospheric constituents in the formation of 6PPD : Quinone in a Korean Metropolitan Region Jeon Hajeong, Ko Dong-Hoon, 송명기, 배민석 p. 23-23
A comparative study of the UV index between OMI and ground : based measurements in Nepal Karna Umakant L., Poudyal Khem N., Tiwari Babu R., Bhattarai Binod K p. 24-24
Emissions of volatile organic compounds from a commercial hen shed in Japan Tanaka Nobuyuki, Hanari Nanami, Takahara Ayumi, Miyazaki Akane, Katata Genki, Kuroda Hisao p. 26-26
Dispersion of PM2.5 particles emitted by the waste dump fire in the city of Guanajuato, Mexico Zamorategui-Molina Adrián, Guzmán Gilberto Álvarez, Longoria Marcos Irineo Esquivel, Vera Juan Carlos Baltazar, Muñoz Alma Hortensia Serafín p. 27-27
Analysis of air quality based on national monitoring networks in the Republic of Korea, 2023 : annual trends in air quality over two decades in South Korea Kang Soyoung, An ChanJung, Lee Dayeong, Jung Dong-Hee, Jeong Eunsun, Jeong Jinju, Song In-Ho, Shin Hye Jung, Lee Seung-Ha, Jung Hae-Jin, Lim Yong-Jae, Park Jung Min, Seong Jiwon p. 28-28

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