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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korean Society for Atmospheric Environment
Journal Basic Information
Journal DOI :
Korean Society for Atmospheric Environment
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Volume & Issues
Volume 11, Issue 4 - Dec 1995
Volume 11, Issue 3 - Sep 1995
Volume 11, Issue 2 - Jun 1995
Volume 11, Issue 1 - Mar 1995
Volume 11, Issue E - 00 1995
Selecting the target year
폐기물 소각현황과 정책
Journal of Korean Society for Atmospheric Environment, volume 11, issue 2, 1995, Pages 101~106
Analysis of Waste Incinerator and Its Selection
Journal of Korean Society for Atmospheric Environment, volume 11, issue 2, 1995, Pages 107~117
Review of treatment methads for gaseous air pollutants discharged from the incineration process of solid wastes
Journal of Korean Society for Atmospheric Environment, volume 11, issue 2, 1995, Pages 118~129
A Study on the Decomposition of CFC-113 by Catalyst
李宇根 ; 平岡正勝 ;
Journal of Korean Society for Atmospheric Environment, volume 11, issue 2, 1995, Pages 131~136
The experiment for decomposing CFF-113 by a honeycomb catalyst was carried out in this study. Benzene and water were used as decomposing agents. The reaction of decomposition was from 600 .deg.C to 900.deg.C. Benzene was injected at 900.deg.C and then the catalyst was heated to 1100.deg.C by the heat of combustion of it. The electric power of the reactor was turned off when the combustion was started. The reaction temperature, however, was main trained and the decomposition of CFC-113 continued at that time. It was found that the highest decomposition efficiency was 80% at the ratio of benzene/CFC-113 of 20/1 in this experiment.
Estimation of Air Pollution by Distribution of Epiphytic Bryophtes in Chonnam Area
Journal of Korean Society for Atmospheric Environment, volume 11, issue 2, 1995, Pages 137~144
The I.A.P.(Index of Atmospheric Purity) by the distribution of Bryophtes on the bark of various latifoliate tree trunks was investigated at four sites(Daeheung, Songkwang, Jeungsim, and Heunggook Temple) from April, 1991 to April, 1993. The IAP was in inverse proportion to the degree of air pollution. The I.A.P at four sites were estimated 78.2 at Daeheung temple, 61.0 at Songkwang temple, 28.3 at Jeungsim temple, and 10.3 at Heunggook temple, respectively. The distribution degree of Bryophytes in Heunggook temple progressed during the last ten years. It represents the bettrment of air quality. Bioassay by means of lichens seems to have great potential for better and less expensive ways of measuring pollution levels instead of the high cost of buying and maintaining air pollution monitoring equipment.
Wind Tunnel Experiments for Studying Atmospheric Dispersion in the Complex Terrain II. Gaussian Modeling of Experiments in a Moutainous Area
Journal of Korean Society for Atmospheric Environment, volume 11, issue 2, 1995, Pages 145~152
Predictability of a Gaussian model, ISCST2 was assessed by scaling up wind tunnel experiments with a 1/3,000 terrain model to the real scale. Concentration profiles obtained from the flat-terrain experiment in the neutral condition were estimated to be in agreement with the calculated ones from ISCST2 in the stability class A, but the difference between the two was still large. Concentration profiles from the mountainous-terrain experiments were better fitted to the calculated ones primarily because in the experiment, concentration behind the source was raised due to the effect of a hill in the upstream side. Model prediction was improved with including the downwash effect of buildings and the hill, but overall concentration profiles were not much different from a typical Gaussian profile. While concentration profiles in the experiments were changed with local flows by varying the wind direction and the topography, those from the Gaussian modeling were mot freely changed together with these variations.
Exhaust Emission Characteristics of in-use Passenger Cars Equipped with Three-way Catalyst
Journal of Korean Society for Atmospheric Environment, volume 11, issue 2, 1995, Pages 153~162
As exhaust emission standards for new passenger cars amended in 1987 have become more stringent, vehicle manufacturers have employed three-way catalyst in order to meet these requirements. The purpose of this study was to gather informations on new emission control systems in customer use for in-use vehicles from the 1987 through 1992 model years were capable of achieving low exhaust emission levels although high levels do occur due to defects, deterioration or maladjustments with the emission control equipment. The vehicles with closed loop electronic control fuel injection system emitted low exhaust emission, but the carburetor control system equipped vehicles emitted high exhaust emissions and the high mileage vehicles exhibited higher average emissions than low mileage vehicles. It was also found that the useful life of 80, 000km is very important to maintain the low emission levels within customer service period.
Application of the STEM II to air pollutant transport/chemistry/ deposition in the Korea and Eastern China Area
Journal of Korean Society for Atmospheric Environment, volume 11, issue 2, 1995, Pages 163~170
The STEM II(Sulfur Transport Eulerian Model II) was adapted to investigate air pollutant transport phenomena between Eastern China and Korea. The movement of the high concentration region was clearly identified for the sulfate but was mot visible for SO
. The 10.sim. 16 times more amount of SO
is transported to Korea compared to that of the local emission while the amount of the sulfate transported to Korea is 1 .sim. 1.3 times more than that of the sulfate produced by photo-chemical reaction in Korea. APTIs(Air Pollutant Transport Indices) for SO
and sulfate are approximately 0.85, which implies that the most of the SO
and sulfate existed in Korea are transported from Eastern China.
The Simultaneous Hydrocracking and Hydrodesulfurization over CoPtMo/LaY Catalyst
Journal of Korean Society for Atmospheric Environment, volume 11, issue 2, 1995, Pages 171~178
The hydrodesulfurization (HDS) of dibenzothiophene (DBT) were performed simultaneously over CoPtMo/LaY catalyst under high H
pressure. The structure and physical properties of this catalyst were characterized using XRD, IR and surface area analyzer. The origin of acid site was mainly Bronsted. The structures of impregnated molybdenum and platinum were deactivated by DBT to MoS
and PtS, respectively. The activities of the HDS and the hydrocracking increased with increasing temperature and pressure. They decreased with increasing the DBT mole ratio(DBT/n-heptane). They remained constant with increasing the H
/H.C. mole ratio. With increasing pressure and DBT mole ratio, the products of secondary cracking increased. To perform simultaneous HDS and hydrocracking effectively, the optimum condition were 500.deg.C, 4MPa.
Chemical characteristics of particulate species in Mt. Sobaek atmosphere(I) : The distribution and behaviour of major ion components
Journal of Korean Society for Atmospheric Environment, volume 11, issue 2, 1995, Pages 179~184
This study was carried out to characterize sources of suspended particulate matter(SPM) in Mt. Soback area from January to Novembver in 1993. The collection and major water soluble ion analysis of SPM were conducted by using a High Volumn Air Sampler(HVAS; W&A Inc., PM-10) and ion chromatograph(DIONEX 4000i), respectively. The variations of SPM and major ion concentrations were found to be 9. sim. 156.mu.g/
0.00 .sim. 0.15.mu.g/
0.06 .sim. 3.79.mu.g/
0.90 .sim. 6.85.mu.g/
1.99 .sim. 9.36.mu.g/
0.00 .sim. 0.27.mu.g/
0.72 .sim. 5.77.mu.g/
0.03 .sim. 0.88.mu.g/
0.12 .sim. 2.76.mu.g/
. Tree sources were identified by Principal Component Amalysis(PCA) using a SPSS/P
. The explanation ability of forst, second and third Principal Component were 60.8%, 13.6%, 8.2%, of total variance. The sources classfied by PCA were found to be secondary aerosol/fuel combustion, soil dust related cement production/yellow sand and aerosol related waste burning.related waste burning.g.
A Study on the Control Performance for Hazardous Gases by Surface Discharge induced Plasma Chemical Process
Journal of Korean Society for Atmospheric Environment, volume 11, issue 2, 1995, Pages 185~190
Recently, because of the worse of the air pollution, the excessive airtught of building and the inferiority of air conditioning system, the development of high efficiency air purification technology was enlarged to the environmental improvement of an indoor or a harmful working condition. The air purification technology has used chemical filters or charcoal filters or charcoal to remove hazardouse gaseous pollutants (SO
, etc.) by air pollutant control technology, but they have many problems of high pressure loss, short life, wide space possession, and treatment of secondary wastes. For these reason, the object of reasearch shall be hazardous gaseous pollutants removal by the surface discharge induced plasma chemical process that is A.C. discharge of multistreams applied A.C. voltage and frequency between plane induced eletrode and line discharge eletrode of tungsten, platinum or titanium with a high purified alumina sheet having a film-like plane. As a result, the control performance for hazardous gaseous pollutants showed very high efficiency in the normal temperature and pressure. Also, after comtact oxidation decomposition of harmful gaseous pollutants, the remainded ozone concentration was found much lower than that of ACGIH or air pollution criteria in Korea.rea.
Chemical characteristics of atmospheric particulate species in Mt. Soback, Korea(II):The sources and seasonal variations of metallic elements
Journal of Korean Society for Atmospheric Environment, volume 11, issue 2, 1995, Pages 191~198
In order to evaluate the distribution and behaviour of atmospheric particulate metals in high-altitude area, we collected 22 aerosol samples using a high volume air sampler at Soback Mt. Meteorological Observation Station from Jan. to Nov. 1993 and analysed for metals (Al, Fe, Mg, Na, Ca, Mn, Co, Ni, Cu, Zn, Cd, and Pb) with ICP/AES and ICP/MS. Although sampling site is located in high-altitude and far from local sources of atmospheric pollutants, enrichments of metals are 2 times higher than those of western coastal reural area. This fact may imply that of metallic pollutants in the coastal rural site were came from further western side (e.g. China), atmospheric metals in this study area contain the signal of metropolitan cities located in the main wind direction (NNW). Sea salts are negligible in the aerosol particle population because reference elements of sea salts (Na, Mg) are all originated from soil particles. The contents of soil particles in aerosols are highest in spring and lowest in winter. Atmospheric enriched elements (Ni, Cu, Zn, Cd and Pb) are diluted with soil particles, especially during the yellow sand period. The results of factor analysis suggest possibility of interpreting their chemical significance in terms of sources (soil, pollutants) and gas-particle conversion processes (formation of ammonium sulfates, ammonium nitrates and/or their mixtures).
A Case Study on the Characteristics of TSP Concentrations and Yellow Sand Phenomena in Seoul
Journal of Korean Society for Atmospheric Environment, volume 11, issue 2, 1995, Pages 199~209
The variations of TSP concentrations observed at Air Quality Monitoring Stations(AQMSs) in Seoul were analysed from 1986 to 1993. And those of Yellow Sand period were investigated to find out the characteristics between normal and Yellow Sand period. The TSP concentrations have begun lower than 150.mu.g/m
annual mean concentration at Gwanghwamun, Hannam-dong, and south river region since 1989, and air quality in Seoul was improved in 1991, but polluted again in Hannam-dong, and Seongsu-dong in 1992. Yellow sand phenomena of 1990 and 1993 were selected for case study. During the whole period in 1990, the TSP concentrations were exceeded over 300.mu.g/m
, which is the upper limit of 24 hour concentration, at the center of city such as Mapo, Gileum-dong, sinseol-dong. But in 1993, the TSP concentrations got lower than 24 hour concentration, and air quality was highly improved.