서울 일부 지하철 객차와 승차장에서 측정한 PM10과PM2.5농도의 특성
Charaterzation of PM10 and PM2.5 Levels inside Train andin Platform of Subway
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Abstract
This study was performed to investigate the concentration of PM10 and PM2.5 in inside train and platform of subway 1, 2, 4 and 5 in Seoul, KOREA. PM10, PM2.5, temperature, humidity and carbon dioxide were monitored using Portable Aerosol Spectrometer at afternoon (between 13:00 and 16:00). The concentrations of PM10 and PM2.5 in inside train were monitored to be higher than those measured in platform. In addition, PM10 concentration in both platform and inside train were found to be greatly higher than range of from 35 mg/m3 to 81 mg/m3 in ambient air reported by Ministry of Environment. This study found that there were many inside train in subway 1, 2, 4 line where exceeded 150 mg/m3 of Korean PM10 standard. The average percentage that exceeded PM10 standard was 83.3% in line 1, 37.9% in line 2 and 63.1% in line 4, respectively. In particular, most of inside train in subway line 1 were over PM10 limit. PM2.5 concentration ranged from 77.7 mg/m3 to 158.2 mg/m3, which were found to be greatly higher than ambient air PM2.5 standard promulgated by United States Environmental Protection Agency (US-EPA) (24 hours arithmatic mean : 65 mg/m3, year average : 15 mg/m3). The percentage of PM2.5 in PM10 was 86.2% in platform, 81.7% in inside train, 80.2% in underground and 90.2% in ground. These results indicated that fine particles (PM2.5) accounted for most of PM10.
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