서울시 지하철 승강장의 스크린도어 설치 전∙후 PM10 오염원의 기여도 비교 연구 (A Comparative Study on PM10 Source Contributions in a Seoul Metropolitan Subway Station Before/After Installing Platform Screen Doors)

서지정보

· 발행기관 : 한국대기환경학회
· 수록지 정보 : 한국대기환경학회지 / 26권 / 5호 / 543 ~ 553페이지
· 저자명 : 이태정, 전재식, 김신도, 김동술

초록

Almost five million citizens a day are using subways as a means of traffic communication in the Seoul metropolitan.
As the subway system is typically a closed environment, indoor air pollution problems frequently occurs and passengers complain of mal-health impact. Especially PM10 is well known as one of the major pollutants in subway indoor environments. The purpose of this study was to compare the indoor air quality in terms of PM10 and to quantitatively compare its source contributions in a Seoul subway platform before and after installing platform screen doors (PSD).
PM10 samples were collected on the J station platform of Subway Line 7 in Seoul metropolitan area from Jun.
12, 2008 to Jan. 12, 2009. The samples collected on membrane filters using PM10 mini-volume portable samplers were then analyzed for trace metals and soluble ions. A total of 18 chemical species (Ba, Mn, Cr, Cd, Si, Fe, Ni, Al,Cu, Pb, Ti, Na+, NH4+, K+, Mg2+, Ca2+, Cl-, and SO42-) were analyzed by using an ICP-AES and an IC after performing proper pre-treatments of each sample filter. Based on the chemical information, positive matrix factorization (PMF) model was applied to identify the source of particulate matters. PM10 for the station was characterized by three sources such as ferrous related source, soil and road dust related source, and fine secondary aerosol source. After installing PSD, the average PM10 concentration was decreased by 20.5% during the study periods. Especially the contribution of the ferrous related source emitted during train service in a tunnel route was decreased from 59.1% to 43.8% since both platform and tunnel areas were completely blocked by screen doors. However, the contribution of the fine secondary aerosol source emitted from various outside combustion activities was increased from 14.8%to 29.9% presumably due to ill-managed ventilation system and confined platform space.

영어초록

Almost five million citizens a day are using subways as a means of traffic communication in the Seoul metropolitan.
As the subway system is typically a closed environment, indoor air pollution problems frequently occurs and passengers complain of mal-health impact. Especially PM10 is well known as one of the major pollutants in subway indoor environments. The purpose of this study was to compare the indoor air quality in terms of PM10 and to quantitatively compare its source contributions in a Seoul subway platform before and after installing platform screen doors (PSD).
PM10 samples were collected on the J station platform of Subway Line 7 in Seoul metropolitan area from Jun.
12, 2008 to Jan. 12, 2009. The samples collected on membrane filters using PM10 mini-volume portable samplers were then analyzed for trace metals and soluble ions. A total of 18 chemical species (Ba, Mn, Cr, Cd, Si, Fe, Ni, Al,Cu, Pb, Ti, Na+, NH4+, K+, Mg2+, Ca2+, Cl-, and SO42-) were analyzed by using an ICP-AES and an IC after performing proper pre-treatments of each sample filter. Based on the chemical information, positive matrix factorization (PMF) model was applied to identify the source of particulate matters. PM10 for the station was characterized by three sources such as ferrous related source, soil and road dust related source, and fine secondary aerosol source. After installing PSD, the average PM10 concentration was decreased by 20.5% during the study periods. Especially the contribution of the ferrous related source emitted during train service in a tunnel route was decreased from 59.1% to 43.8% since both platform and tunnel areas were completely blocked by screen doors. However, the contribution of the fine secondary aerosol source emitted from various outside combustion activities was increased from 14.8%to 29.9% presumably due to ill-managed ventilation system and confined platform space.

참고자료

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