Ji Yi Lee
이화여자대학교 Earth and Planetary Sciences · 지구·행성과학
이 교수의 연구실은 대기 중 미세먼지의 화학적 구성과 기원을 규명하는 데 초점을 맞추고 있으며, 특히 휘발성 유기화합물인 다환화학물질(PAHs)과 산화형 다환화학물질( oxy-PAHs)의 계절적 변화, 기후적 요인 및 온실가스 배출과의 연관성을 연구하고 있습니다. 고해상도 분석 기법을 활용해 대기질 오염물질의 기원과 전파 메커니즘을 규명하고 있으며, 도시와 배경 지역 간의 오염 특성 비교를 통해 영향 평가 및 정책 제안에 기여하고 있습니다. 특히, GC×GC-TOFMS와 같은 고도화학 분석 기술을 응용하여 복잡한 대기질 성분을 정밀하게 분석하는 데도 전문성을 기르고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Polycyclic Aromatic Hydrocarbons (PAHs) and n-alkanes in particulate matter with an aerodynamic diameter of 2.5 micrometers or less (PM2.5) were quantified at Seoul, Korea in 2018. The seasonal differences in the total concentration of PAHs and n-Alkanes were clear, where winter showed a higher concentration than that of summer. Compared to the PAHs measurements in 2002 at Seoul, the sum of PAHs concentrations in 2018 were reduced from 26.6 to 5.6 ng m<sup>-3</sup>. Major sources of the observed
The temporal trend of the particulate polycyclic aromatic hydrocarbon (PAH) level was observed at Gosan, a background site in Korea, for 4 years between November 2001 and January 2004. The total average concentration of ambient particulate PAH compounds was 3.65 ± 4.74 ng m −3 , which was mainly affected by a rather small number of very high PAH level samples. The PAH level at Gosan was 1 or 2 orders higher than those at other remote sites and 1 or 2 orders lower than those in urban areas in nor
The atmospheric size distributions of particulate polycyclic aromatic hydrocarbons (PAHs) up to 10 μm in diameter were measured at Seoul in the summer and winter of 2003. The concentrations of total PAHs were from 4.32 to 5.48 ng m−3 in summer and from 25.6 to 35.9 ng m−3 in winter, respectively. Majority of the PAHs concentrations were found on fine particles (D p < 2.1 μm). The size distributions of individual PAH compounds were bimodal with the peaks in the 0.43–0.65- and 4.7–5.8-μm range in
The concentrations of oxy-PAHs in PM were found to be higher in winter than in summer, which might lead to greater electrophysiological instability through the ROS generation and disruption of calcium regulation.
It is imperative to understand the changes of the levels of air pollutants in Northeast Asia with respect to the changes of the emissions of air pollutants. In this study, we analyzed long-term trends of both the chemical composition of fine particles and gaseous species in Seoul, a megacity, and Baengnyeong Island, a background area located in the Yellow Sea of Republic of Korea (South Korea) from 2012 to 2019. Long-term changes of the concentrations of air pollutants were analyzed using the Ma
Advanced separation technology paired with mass spectrometry is an ideal method for the analysis of atmospheric samples having complex chemical compositions. Due to the huge variety of both natural and anthropogenic sources of organic compounds, simultaneous quantification and identification of organic compounds in aerosol samples represents a demanding analytical challenge. In this regard, comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry (GC×GC-TOFMS) has b
