봄과 여름철 부산 도심에서 도보 및 대중교통 이용자의 초미세먼지 (PM2.5) 노출과 흡입량 비교 (Comparison of Transit User’s Inhalation Rates of PM2.5 between Three Transportation Types (Walk, Bus, Subway) in Spring and Summer in Urban Areas of Busan, Korea)

서지정보

· 발행기관 : 한국대기환경학회
· 수록지 정보 : 한국대기환경학회지 / 35권 / 5호 / 577 ~ 592페이지
· 저자명 : 박용미, 김라은, 최원식

초록

To mitigate air pollution from vehicle emissions, the government recommends using public transportation.
However, studies to assess public exposure to air pollutants (particularly, fine particles here) during the use of public transportation have been limited in Korea. We measured concentrations of particulate matter smaller than 2.5 μm in diameter (PM2.5) with DustTrak 8530 in three types of transportation environments (walk along roadsides, A/C on and off buses, and subways) in urban areas of Busan, Korea. A total of 13 round-trips were made for seven days in spring and summer of 2017.
The mean PM2.5 concentrations were the highest in the cabin of A/C non-operated buses (27.1 μg·m-3), followed by walking on the roadside (24.4 μg·m-3), subway platform (20.4 μg·m-3) and walking on campus of university (19.9 μg·m-3), inside subway trains (15.0 μg·m-3), and A/C operated buses (10.2 μg·m-3). Based on ventilation for healthy adults and the observed PM2.5 concentrations, we also estimated inhalation rates of PM2.5 in these transportation environments. Inhalation rates depend on both PM2.5 levels and activities of transit-users (ventilation). With the ambient PM2.5 concentration of 35 μg·m-3, the inhalation rates in the cabin of A/C operated buses, subway, and A/C non-operated buses were reduced to 46%, 68%, and 81%, compared to the inhalation rate in a walk along the roadside. These reductions even increase as ambient PM2.5 level increases. This study provides the useful information to establish the guidelines for minimizing the transit-users’ exposure to PM2.5, although we need to collect more data under various weather and PM2.5 conditions to confirm our conclusion because the exposure risks vary depending on the specific environments and seasons.

영어초록

To mitigate air pollution from vehicle emissions, the government recommends using public transportation.
However, studies to assess public exposure to air pollutants (particularly, fine particles here) during the use of public transportation have been limited in Korea. We measured concentrations of particulate matter smaller than 2.5 μm in diameter (PM2.5) with DustTrak 8530 in three types of transportation environments (walk along roadsides, A/C on and off buses, and subways) in urban areas of Busan, Korea. A total of 13 round-trips were made for seven days in spring and summer of 2017.
The mean PM2.5 concentrations were the highest in the cabin of A/C non-operated buses (27.1 μg·m-3), followed by walking on the roadside (24.4 μg·m-3), subway platform (20.4 μg·m-3) and walking on campus of university (19.9 μg·m-3), inside subway trains (15.0 μg·m-3), and A/C operated buses (10.2 μg·m-3). Based on ventilation for healthy adults and the observed PM2.5 concentrations, we also estimated inhalation rates of PM2.5 in these transportation environments. Inhalation rates depend on both PM2.5 levels and activities of transit-users (ventilation). With the ambient PM2.5 concentration of 35 μg·m-3, the inhalation rates in the cabin of A/C operated buses, subway, and A/C non-operated buses were reduced to 46%, 68%, and 81%, compared to the inhalation rate in a walk along the roadside. These reductions even increase as ambient PM2.5 level increases. This study provides the useful information to establish the guidelines for minimizing the transit-users’ exposure to PM2.5, although we need to collect more data under various weather and PM2.5 conditions to confirm our conclusion because the exposure risks vary depending on the specific environments and seasons.

참고자료

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