박보은 이승복 이동훈 이승재 우대광 최재현 진현철 배귀남 윤성택 2024-01-20T15:05:06Z 2024-01-20T15:05:06Z 2021-09-06 2012-03 1738-8716 https://pubs.kist.re.kr/handle/201004/129448 Air pollution levels of gases and aerosol particles inside the Jeongneung and Hongjimun tunnels of the Naebu express way in Seoul were investigated through on-road measurement using a mobile emission laboratory (MEL) on February 8, 2011. The concentrations of NOx, CO2, number concentration of particles ranging 21-560 ㎚, and surface area of particles deposited on a human lung almost linearly increased with increasing distance from the tunnel entrance, and decreased rapidly before the tunnel exit. This trend was observed regardless of tunnel length and driving directions, which thought to be caused by semi-transverse ventilation facilities of the tunnels. The concentration increments per 1-m distance for NOx, CO2, deposited particle surface area, and number of particles ranging 21-560 ㎚ were 0.61~0.80 ppb, 0.16~0.21 ppm, 0.20~0.29μ㎡/㎤, and 117~192 particles/㎤, respectively. Average pollution levels inside the two tunnels for CO2, deposited particle surface area, and number of particles >5.6 ㎚ ranged 681~748 ppm, 246~381μ㎡/㎤, and 2.4~6.7×105 particles/㎤, respectively. In case of NOx, the maximum concentration exceeded 1 ppm. These pollution levels inside the tunnels are much higher than those at urban background sites. This result can be utilized as basic data to evaluate the effectiveness of present ventilation system for reducing the pollution level caused by vehicles inside the tunnels. Korean 한국입자에어로졸학회 도시 자동차도로 터널 내부의 대기오염도 공간분포 특징 Spatial Distribution of Air Pollution Level inside Roadway Tunnels in Urban Area Article 2 PARTICLE AND AEROSOL RESEARCH, v.8, no.1, pp.17 - 28 PARTICLE AND AEROSOL RESEARCH 8 1 17 28 kci other ART001646016 Roadway tunnel Air pollution On-road measurement Vehicle emission Nanoparticle