운행 중 대중교통차량 내 총휘발성유기화합물류(TVOC) 노출 분석 = Analising of total volatile organic compounds (TVOCs) exposure in public transportation during operation

다국어 초록 (Multilingual Abstract)

In this study, we measured the concentration of total volatile organic compounds (TVOCs) in four different seasonsfrom 2016 to 2017 in order to determine seasonal variation of indoor air quality in relation to public transportationmodes (subways, trains, and express buses). The measurement was carried out both during rush hour when trafficwas congested as well as during non-rush hour when traffic was not congested. Effects by season, degree ofcongestion, and characteristics of public transportation were analyzed on the basis of 295 items of data during theperiods of congestion and 295 items of data during the periods of non-congestion. The average TVOCs concentrationin winter was the highest with 226.4 μg/m3. The average TVOCs concentration on an express bus was the highestwith a seasonal average of 142.3 μg/m3. The TVOCs concentration in the period of congested traffic was higherthan in the period of non-congested traffic for all public transportation modes. For the average TVOCs concentrationby season and transportation, there was no data that exceeded the guidelines regarding maintaining indoor air quality.
However, 2.5% of all sample measured data (TVOCs) exceeded the guidelines regarding maintaining indoor airquality. Therefore, the continuous monitoring of public transport vehicles is required.

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