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서울시 지하철 객차 내 PM과 CO<sub>2</sub>의 농도 분포
이철민,박화미,노영만,김윤신,박동선,Lee, Choel-Min,Park, Wha-Me,Roh, Young-Man,Kim, Yoon-Shin,Park, Dong-Sun 한국환경보건학회 2008 한국환경보건학회지 Vol.34 No.1
The objective of this study is to provide the research data on the actual concentrations of $PM_{10},\;PM_{2.5},\;PM_1\;and\;CO_2$ in Seoul subway carriages. Mean concentrations of $PM_{10},\;PM_{2.5}\;and\;PM_1,\;and\;CO_2$ in subway carriages were investigated at levels of $215.1{\pm}101.4{\mu}g/m^3,\;86.9{\pm}38.6{\mu}g/m^3,\;27.0{\pm}11.4{\mu}g/m^3,\;and\;1,588{\pm}714ppm$, respectively. The mean concentrations in subway carriages were higher when the train ran on an underground track rather than on an above ground track. The measured concentration of particulate matter varied with the time of day and was highest in the morning, followed by noon and evening while the $CO_2$ concentration was highest in the morning, followed by evening and noon. In relation to correlation among the pollutants: the correlation between $PM_{10}\;and\;PM_{2.5}$ was 0.92, and that between $PM_{2.5}\;and\;PM_1$ was 0.94. The inclusion rate of $PM_{2.5}\;to\;PM_{10}$ was $41{\pm}7%$ and that of $PM_1\;to\;PM_{2.5}\;was\;32{\pm}4%$. In addition, the $CO_2$ concentration had a positive relation with the number of people in a carriage, whereas the concentration of $PM_{10}$ had negative correlation to the number of people. In relation to these two pollutants we calculated using a regression equation (34.06+0.04$CO_2$(ppm)-0.09 PM10$({\mu}g/m^3)$($R^2$=0.30, p<0.01, n=707), that a maximum number of 61 persons would ensure that each pollutant is maintained below the criteria level, applicable to subway stations.
노영만(Young-Man Roh),박화미(Wha Me Park),이철민(Choel Min Lee),김윤신(Yoon Shin Kim),이상운(Sang Woon Lee),석미희(Mi Hee Suk),정춘화(Chun Hwa Jeong) 한국실내환경학회 2007 한국실내환경학회지 Vol.4 No.3·4
This study was performed to investigate the characteristics of asbestos distribution in 6 public and 6 school buildings from August to September in 2006. The bulk samples were analysed by PLM(polarized light microscope). Also the airborne samples were analysed PCM(phase contrast microscope) and confirmed by SEM-EDX(scanning electron microscope-energy dispersive using X-ray analysis) method. The 6 public buildings included the ACM(asbestos containing material) ranged 2-7 % of chrysotile in 70 % of samples from ceiling, floor tile, and wall board and has 20 % tremolite in 2 ceiling plaster. The 6 school buildings were identified 1.5 % tremolite in one sample and showed the similar asbestos distribution with the public building. The airborne concentrations of fiber materials were ranged with 0.000-0.017 f/cc in public places and 0.000-0.012 f/cc in school building by PCM. However, the asbestos fibers could not be found by SEM-EDX. In the result of physical assessment of ACM in each buildings, it is considered that there is no chance of a hazardous situation because the ACM is not friable. Its suggested that the asbestos control plan should be established to prevent asbestos exposure to occupants from damaged ACM by repairing and custodial work.
박화미(Wha Me Park),노영만(Young-Man Roh),이철민(Choel Min Lee),김윤신(Yoon Shin Kim),박동선(Dong Sun Park),장봉기(Bong Ki Jang),원영재(Young Jae Won) 한국실내환경학회 2006 한국실내환경학회지 Vol.3 No.1
This study was performed to investigate the concentration levels of CO₂ and the associated parameters in the subway from lines 1 to 8 in Seoul metropolitan area, during 1 to 30 Sept. 2005. CO₂ concentration was measured at the entrance and center in subway passenger cabin by non-dispersive infrared analyser. The associated parameters for CO₂ were estimated based on the number of passenger, open and closed doors etc. The mean CO₂ concentrations were measured to be 1.646±712 ppm in subway passenger cabins. The CO₂ concentrations showed the highest values between 7 and 9 AM in rush hour(p <0.01). The correlation coefficient between CO₂ and the number of passenger was highly significant(r=0.824). The general linear model indicated that subway line, subway location (ground and underground tract), and measurement point (enterance and center of cabins) and running time (morning and afternoon) significantly influenced the concentrations of CO₂. An extended study is needed to examine the sources of CO₂ in subway cabins and to compare pollutants concentration among subway lines.
김윤신(Yoon Shin Kim),노영만(Young Man Roh),홍승철(Seung-Cheol Hong),이철민(Choel Min Lee),전형진(Hyung Jin Jun),김종철(Jong Choel Kim),조정현(Jung Hyun Cho) 한국실내환경학회 2005 한국실내환경학회지 Vol.1 No.2
This study was performed to investigate the characteristics of indoor air quality (IAQ) in 30 public facilities from February to April, 2004 in Seoul. The collected samples are PM₁?, formaldehyde, and total suspended bacteria in indoor air and measured by the IAQ standard method of Ministry of Environment in Korea(M.E.K). As the results of the survey, the mean concentration of PM₁? was 55.19 ㎍/㎥ in indoor air and 51.15 ㎍/㎥ in outdoor air. The mean concentration of PM₁? in the Kindergarten was higher than the IAQ standards by established by M.E.K. The mean concentration of formaldehyde was 43.08 ㎍/㎥ in indoor air and 5.05 ㎍/㎥ in outdoor air, respectively. All of them were less than IAQ standards of Korea. The concentration of total suspended bacteria in the streamer room was higher than IAQ standards. The concentration of formaldehyde was different according to the year of construction of building. Total suspended bacteria in streamer room was necessary for control. Moreover, this study was for investigation a part of indoor air pollution condition in public facilities. It means that this study can"t represent for all of public facilities. Therefore, we suggest that long and middle term country plan for management of IAQ should be established through long-term and continuous investigation of IAQ condition.
노영만(Young Man Roh),김윤신(Yoon Shin Kim),이철민(Choel Min Lee),김기연(Ki Youn Kim),전형진(Hyung Jin Jeon),김종철(Jong Choel Kim) 한국실내환경학회 2006 한국실내환경학회지 Vol.3 No.4
This study was undertaken to investigate the distribution characteristics of the hazardous agents in indoor environment in 7 vessels in Incheon harbor from July to August, 2004. The measured parameters include several indoor air pollutants (PM₁?, CO₂, HCHO, and TVOCs) and physical parameters (noise, vibration, temperature, and humidity). The levels of pollutants and hazardous components in vessels were compared with standards and guidelines of indoor air quality on the Ministry of Environment and the Ministry of Labor in Korea. The major results obtained from this study were as followed : The PM₁? and CO₂ levels in every vessel did not exceed the indoor air standard of 150 ㎍/㎥ and 1000 ppm, respectively. The level of PM₁? showed a decreasing tendency as the weight of vessels is increased. The airbornce concentration of HCHO was the highest one by exceeding its standard in a 500 ton vessel. The noise level in engine room exceeded the workplace standard (90 ㏈(A)) recording above 100 ㏈(A). The TVOCs level in every engine room was more than its standard (500㎍/㎥). Based on our preliminary study of indoor air pollutants in vessels, it is suggested that long and middle term plan for the management of IAQ should be established through future investigation of vessels.