http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
손윤석,Amgad Salama,정효선,Suhyang Kim,정진호,이재효,선우영,김조천 한국대기환경학회 2013 Asian Journal of Atmospheric Environment (AJAE) Vol.7 No.1
PM10 concentrations were measured at four monitoring sites at the Daechaung station of the Seoul subway. The four locations included two tunnels, a platform,and a waiting room. The outside site of the subway was also monitored for comparison purposes. In addition, the effect of the platform screen doors (PSDs) recently installed to isolate the PM10 in a platform from a tunnel were evaluated, and a comparison between PM10 levels during rush and non-rush hours was performed. It was observed that PM10 levels in the tunnels were generally higher than those in the other locations. This might be associated with the generation of PM10 within the tunnel due to the train braking and wear of the subway lines with the motion of the trains, which promotes the mixing and suspension of particulate matter. During this tunnel study, it was observed that the particle size of PM10ranged from 1.8 to 5.6 μm. It was revealed that the PM10 levels in the tunnels were significantly increased by the PSDs, while those in the platform and waiting room decreased. As a result, in order to estimate the effect of ventilation system on PM10 levels in the tunnels,fans with inverters were operated. It was found that the concentration of PM10 was below 150 μg/m3when the air flow rate into a tunnel was approximately 210,000-216,000 CMH.
손윤석 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
산업의 발전 및 세계경제 성장으로 인하여 대기오염 문제의 심각성이 대두되고 있다. 다양한 대기오염물질 중 최근 가장 큰 이슈는 미세먼지이다. 미세먼지는 배출원에서 직접 배출되는 1차 미세먼지와 대기 중에서 추가적인 반응으로 생성되는 2차 미세먼지로 나누어진다. 2차 미세먼지의 주요 전구물질은 배출원에서 배출된 질소산화물(NO<sub>x</sub>)과 황산화물(SO<sub>2</sub>)이다. 따라서, NO<sub>x</sub>와 SO<sub>2</sub>를 저감하기 위한 다양한 기술들이 연구 및 사용되고 있다. 하지만 기존의 기술들이 가지고 있는 한계점으로 인하여 최근에는 전자선 및 플라즈마 등을 이용한 신기술들에 대한 연구가 활발히 진행되고 있다.