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김신도,김창환,황의현,Kim, Shin-Do,Kim, Chang-Hwan,Hwang, Ui-Hyun 한국환경보건학회 2008 한국환경보건학회지 Vol.34 No.2
The variation of the particle size distribution and density as well as the chemical composition of aerosols is important to evaluate the particles. This study measured and analyzed airborne particles using a scanning mobility particle sizer (SMPS) system and an aerodynamic particle sizer (APS) at the University of Seoul during every season. The highest particle number concentration of airborne particles less than $0.9\;{\mu}m$, occurred in winter, while the highest particle number concentration of airborne particles more than $0.9\;{\mu}m$, occurred in spring. Mass concentration appeared highest at spring. Also, when we compared $\beta$-ray's mass concentration with calculated mass concentration by using the SMPS-APS system during each season, density of the winter is $1.92\;g/cm^3$, spring density is $1.64\;g/cm^3$, fall density is $1.57\;g/cm^3$. We found out that PM10 density was differ every season. However, while the calculated density is whole density for PM10 the density of each diameter was different. In this study the density estimation equation of the QCM cascade impactor measured mass concentration of each diameter.
신축아파트의 카보닐화합물(Carbonyls)의 농도분포 특성
김신도(Kim Shin-Do),김창환(Kim Chang-Hwan) 한국건축친환경설비학회 2008 한국건축친환경설비학회 논문집 Vol.2 No.3
Due to the increasing need for the office supplies and the building materials, the emissions of various carbonyl compounds occur in the indoor environment, In this study, we investigated the emission characteristics of carbonyl compounds indoor environment with a major emphasis on formaldehyde, acetaldehyde, and acrolein. In order to understand the distribution characteristics of these carbonyl compounds, measurements were undertaken for three months (April to June 2007) to cover a total of 60 newly built apartments (i.e, ones built less than three months). The concentrations of formaldehyde, acetaldehyde, and acrolein measured during the entire study period averaged as 231 ± 164, 60.3 ± 28.9, and 7.8 ± 10.9 ㎍ m 3, respectively (N = 60). Evaluation of threshold limit values (TLVs : TLV of a chemical substance defines the reasonable level to which a worker can be exposed without adverse health effects. Strictly speaking, TLV is a reserved term of the American Conference of Governmental Industrial Hygienists (ACGIH)) indicates that formaldehyde and acetaldehyde data exceeded the allowable values by 43 and 58 percent, respectively. In the case of total carbonyl compounds, 95 percent of the data exceeded the allowable TLV values.
서울시 쓰레기의 배출추세와 쓰레기 소각열의 이용에 관한 연구
김신도,Kim, Shin-Do 대한설비공학회 1986 설비저널 Vol.15 No.1
This is to supply the basic data for saving energy and the appropriate way of waste disposal. The amount of waste disposed and its heat after burning is guessed to get conclusions. 1. The amount of disposable waste in 1990 in Seoul area is expected to be 2.2kg per man/day, coal ashes (YONTAN) 0.7kg, non-coal ashes 1.5kg. 2. The amount of waste combustible and heat after burning will be increased, and it is useful when the waste has Less than $70\%$ of water. 3. The method to collect waste should be specially organized, because most of the waste collected In Korea Is wet. 4. As the heat emitted from mass burning is $4\times10^{12}kcal/y$ in 1985, it is considered to be in senses of energy saving and the rationnal way of waste disposal. 5. Special concern is needed because the environment contaminated will be polluted in result of burning.