(주)에이피엠엔지니어링

서울지역 여름철 VOCs 일변동 특성에 관한 연구

Characteristics of Diurnal Variation of Volatile Organic Compounds in Seoul, Korea during the Summer Season

abstract

In this study, volatile organic compounds (VOCs) were measured using a proton transfer reaction-time of

flight-mass spectrometer (PTR-ToF-MS) at the Seoul Metropolitan Area Intensive Monitoring Station (SIMS)

in Korea during the summer season of 2018. The results revealed that oxygenated VOCs (OVOCs) contributed

a large fraction (83.6%) of the total VOCs, with methanol being the most abundant constituent (38.6%). The

VOCs measured at SIMS were strongly influenced by local conditions. Non-volatile organic compounds

(NVOCs), such as pinene, increased due to northeasterly wind direction in the morning, and OVOCs and

anthropogenic VOCS (AVOCs) increased with northwesterly wind direction during the daytime. This was the

result of the eastward location of Bukhansan National Park and the westward location of urban area from the

SIMS location. The VOCs included abundant oxidized forms of VOCs, which can affect the generation of fine

dust through various response pathways in the atmosphere. The real-time measurement technique using PTRToF-

MS suggested in this study is expected to contribute to an improved scientific understanding of high-concentration

fine dust events because the high temporal resolution makes it possible to analyze the variations of

VOCs reflected in dynamic events.

Sources: Journal of the Korean Society for Environmental Analysis