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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
Editor in Chief :
Volume & Issues
Volume 10, Issue 4 - Dec 1994
Volume 10, Issue 3 - Sep 1994
Volume 10, Issue 2 - Jun 1994
Volume 10, Issue 1 - Mar 1994
Volume 10, Issue E - 00 1994
Selecting the target year
Removal of Sulfur Dioxide by Cupric Oxide and Reduction of Cupric Sulfate by Hydrogen
Journal of Korean Society for Atmospheric Environment, volume 10, issue 2, 1994, Pages 83~89
The reaction of sulfur dioxide with cupric oxide was investigated over a temperature range of 300-50
, and the regenaration reaction was studied using cupric sulfate and hydrogen over a temperature range of 240-35
in a fixed bed reactor. The experimental results showed that the efficiencies for elimination and regenaration reactions were maximum at 45
and at 30
respectively. In both cases the experimental data could be interpreted properly by shrinking unreacted core model while the chemical reaction is rate controlling step. The reaction rate constants were determined to be 24.88 exp(-6724/RT) (cm/min) for elimination reaction, and 0.0165 exp(-2047/RT)(cm/min ) for regeneration reaction.
PIXE Analysis for Elemental Analysis in Aerosol
Journal of Korean Society for Atmospheric Environment, volume 10, issue 2, 1994, Pages 90~97
PIXE( Proton Induced X- ray Emission ) analysis has been applied to the analysis of aerosol for the Purpose of pollution monitoring. Coarse and fine Particle fractions were sampled selectively, using Nuclepore filter in stacked filter units, once a month from February to September in 1993 at urban and rural sites. Concentration of 9 elements, Si, S, K, Ca, Mn, Fe, Cu, Zn and Pb was determined without Pretreatment of Samples. Comparison of data between urban and rural site revealed higher elemental concentration level in urban aerosol. From April to May aerosol sampling was carried out daily to observe the effect of Yellow Sand on the composition of aerosol in the Korean Peninsula. During the Yellow Sand period, Si, Ca, Fe content level in aerosol became more than 5 times higher than normal. The elemental concentration of the aerosol samples of Daejeon City was compared with that of two foreign cities. S and Pb( which are fuel- derived elements) levels in Daejeon City aerosol appeared to be lower than those of foreign cities. And it may be due to the leaded-fuel restriction policy of Korean government since 1987.
Analysis of Rainwater Samples in Cheju
Journal of Korean Society for Atmospheric Environment, volume 10, issue 2, 1994, Pages 98~104
Precipitation samples were collected at Kosan, Cheju Island over a period of 6 months An automatic rain sampler was manufactured domestically and installed at Kosan station. All samples were collected on a weekly basis. Samples were analyzed for S
, and pH and specific conductivity. The quality analysis of rain sample data were performed based on ion balance and specific conductivity. The pH of rain samples ranged between 4.6 to 6.6. Bicarbonate ion concentration were included in ion balance and specific conductivity calculations. The sum of cation concentrations were slightly greater than the sum of anion concentrations. Calculated specific conductivity was greater than measured specific conductivity. The most probable explanations for this discrepancy is "an anion too low or anion missing." Two criteria were used to identify outliners. They are 1) the difference between the sum of anion concentrations and cation concentration is more than 50
eq./1 and 2) the difference between calculated and measured specific conductivity is more than 25%. Chemical analysis from several samples did not satisfy these quality control criteria. Volume weighted average concentrations were calculated. Dominant free acids in rain samples were N
ions in order of abundance. Non-seasalt sulfate comprises 76% of total sulfate.sulfate.e.ate.e.
Carcinogenic risk assessment of heavy metals in suspended particulates of Seoul
Journal of Korean Society for Atmospheric Environment, volume 10, issue 2, 1994, Pages 105~115
This study was conducted to assess the health risk of carcinogenic heavy metals such as arsenic, nickel, chromium and cadmium Ambient concentrations of these metals were measured bimonthly, during May 1987 to March 1988. Respirable Particle concentrations of As, Ni, Cr, Cd in traffic area(Shinchon) were 16ng/㎥, 43ng/㎥, 4.2ng/㎥, 6.6ng/㎥, respectively, and in residential area(Bulkwang) were 25ng/㎥, 32ng/㎥, 4.7ng/㎥, 8.9ng/㎥, respectively. Carcinogenic risk of each metal was calculated by multiplication of ambient concentration and unit risk of the metal which was referred to recent version of Integrated Risk Information System(IRIS). Sum of the risk from these for metals was 9.8
as individual risk in traffic area and 13.9
in residential area.
Application of the E-
turbulence numerical model to a flow and dispersion around triangular ridge( I )
Journal of Korean Society for Atmospheric Environment, volume 10, issue 2, 1994, Pages 116~123
turbulence numerical model was applied to a flow around triangular ridge in neutral boundary layer. Scale of cavity region, mean velocity, Reynolds stress and eddy diffusivity were investigated. The height of cavity region was in satifactory agreement with the wind tunnel data while the length of cavity region was underestimated. The man wind velocities outside the cavity region were well Predicted by the model, however in cavity region the mean wind velocities of wind tunnel data were larger than the model results Reynolds stress of cavity region was overestimated by the model. The eddy diffusivity of wake region was strongly modified under the influence of triangular ridge. The local minimum of the eddy diffusivity was occured in the lee of the ridge top.
Characterization of Size distribution of Anion Species in Atmospheric Aerosols
Journal of Korean Society for Atmospheric Environment, volume 10, issue 2, 1994, Pages 124~129
Aerosol size distribution was determined using Anderson sampler for the anions( sulfate nitrate and chloride ) and TSP. Ionic species concentration and size distribution have been investigated in the daytime and nightime individually. Size classified samples were extracted with distilled water and analyzed for C
, by ion chromatography. The size distribution of these ions and TSP was analyzed to investigate the seasonal and diurnal variation of concentrations as follows: (1)Size distribution of TSP showed bi- modal type in the daytime, but indicated tri-mode distribution in the nightime without any seasonal variation. (2)Sulfate concentrations were higher in fine- mode both in the daytime and nightime but fraction of sulfate was higher in coarse-mode during the Yellow Sand Period. (3)Nitrate and Chloride ions are dominant in fine-mode in winter while dominant in coarse-mode in the summer.
Concentration of NH
in TSP in Seoul Ambient Air
Journal of Korean Society for Atmospheric Environment, volume 10, issue 2, 1994, Pages 130~136
Concentration of volatile particulate nitrate(NH
) in TSP in ambient air was determined from Feb. to Oct 1993. Sampling was carried out using a two-stage Andersen air sampler at the top of a five-story building located at Kon- Kuk University in Seoul Concentration of NH
in TSP was measured by Pyrolysis of sample filters at 16
for 1hr. Concentration of NH
was higher in winter time compared with that in summer time. Also, concentration of NH
was higher in fine particles compared with that in coarse particle. The range of NH
concentration was between 2.99 and 9.86
/㎥. Weight fraction of NH
in total particulate nitrate was 31.1~59.5%, and weight fraction of NH
in YSP was 2.1~11.2%.
Modeling of Smog Characteristics in Seoul during the Fall,1993
Journal of Korean Society for Atmospheric Environment, volume 10, issue 2, 1994, Pages 137~145
A visibility analysis model based on the Mie theory is applied to the measurements during the fall, 1993 in Seoul. Model estimations of the total extinction coefficient
, and the particle scattering coefficient,
are in good agreement with the measured values by a transmissometer and a nephelometer, respectively. These values show strong dependency on the mass loading of fine particles(
) but show no apparent relation with that of coarse particles(3.0
). Relative humidity plays an important role in determining the size of particles which in turn, affects the optical efficiency of aerosol. Based on the composition analysis with cut size nitrate concentration is higher than the sulfate concentration in PM3-10 but they are comparable to each other in PM3. Considering in 1985, it demonstrates a drastic increase of nitrate concentration between 1985 and 1993. It is found that measured and estimated light extinction budget were in good agreement within 10% and that scattering by particles is responsible for about 50-55% and 70-80 % of total extinction during clear and smoggy periods respectively.y.