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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Environmental Science International
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Journal DOI :
The Korean Environmental Sciences Society
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Volume & Issues
Volume 19, Issue 12 - Dec 2010
Volume 19, Issue 11 - Nov 2010
Volume 19, Issue 10 - Oct 2010
Volume 19, Issue 9 - Sep 2010
Volume 19, Issue 8 - Aug 2010
Volume 19, Issue 7 - Jul 2010
Volume 19, Issue 6 - Jun 2010
Volume 19, Issue 5 - May 2010
Volume 19, Issue 4 - Apr 2010
Volume 19, Issue 3 - Mar 2010
Volume 19, Issue 2 - Feb 2010
Volume 19, Issue 1 - Jan 2010
Selecting the target year
A Case Study of Characterization of AOC Formation
Kim, Ji-Hoon ; Hwang, Hyeon-Uk ; Kim, Young-Ju ;
Journal of Environmental Science International, volume 19, issue 3, 2010, Pages 261~267
DOI : 10.5322/JES.2010.19.3.261
The variation of assimilable organic carbon(AOC) concentration at each condition of ozonation was investigated using a model water and drinking water resource. AOC concentration of model raw water and drinking water resource tended to increase at low ozone dose. The maximum AOC concentration was detected when the residual ozone begin to be measured. Also, the AOC concentration increase at pH 8 compared to both pH 6 and 7 while that for pH 9 decreased rapidly. The removal characteristics of trihalomethane formation potential(THMFP) by ozonation was also investigated. Unlike the trend of AOC, the THMFP concentration never increased by ozonation but decreased even at low ozone dosage. From these results, the ozone dosage would be effective to simultaneously decrease both AOC and THMFP.
Numerical Simulation and Process Analysis Using the MM5-CMAQ in Yangsan on High Ozone Days during Spring and Summer
Kim, Yoo-Keun ; Park, Sang-Hyun ; Kang, Jae-Eun ; Song, Sang-Keun ;
Journal of Environmental Science International, volume 19, issue 3, 2010, Pages 269~279
DOI : 10.5322/JES.2010.19.3.269
The relative contributions of physical and chemical processes to the production of ozone (
) were evaluated based on an integrated process rate (IPR) analysis using the MM5/CMAQ in a downtown (i.e., Yangsan_U) and suburban area (i.e., Ungsang) on high ozone days during spring and summer in 2006 (28 April and 8 August 2006). The IPR includes a horizontal advection (HADV) and diffusion (HDIF), a vertical advection (ZADV) and diffusion (VDlF), a dry deposition (DDEP), and a chemistry (CHEM). The VDIF in Yangsan_U was found to be the most dominant contributor (29.5% in spring and 32.1% in summer) to high
concentrations, followed by the HADV and ZADV. In contrast, the contributions of the HADV (40.3% in spring and 32.3% in summer) in Ungsang were significantly higher than those of VDIF and ZADV. Moreover,
production due to the chemical effect in the two areas (especially in Ungsang) during summer was found to be moderately higher than that during spring.
Effect of Difference of Land Cover Conditions on Urban Thermal Environment in Daegu Using Satellite and AWS Data
Ahn, Ji-Suk ; Kim, Hae-Dong ; Kim, Sang-Woo ;
Journal of Environmental Science International, volume 19, issue 3, 2010, Pages 281~293
DOI : 10.5322/JES.2010.19.3.281
The present study explores time and spatial thermal environment for Daegu, which is a city built on a basin area, according to varying land cover conditions of the earth's surface by analyzing data derived from meteorological observation and satellite images. The study has classified land use by utilizing MODIS satellite images and analyzed land surface temperature. Also, by using data acquired from automatic weather system, the study has evaluated the effects of atmospheric heating caused by city pavements by analyzing the sensible heat flux between the city's land surface and the atmosphere. The results are as follows. 1) Classification of land use in the Daegu area shows 46.64% of urban and built-up area, 1.39% of watersides, 35.19% of forest, 11.43% of crops, and 5.37% grasslands. 2) During the weekdays throughout the year, the land surface temperature was high for Dalseogu, Bukgu, and Seogu regions where industrial complexes could be found. Comparatively, lower temperature could be observed in the woodlands. 3) While the land surface temperature displayed the effects of pushing air upwards during the weekdays in urban areas, the reverse was true for forest regions. During the night, the temperature did not exert any significant influence on air movement.
Influence of Land Use and Meteorological Factors for Evapotranspiration Estimation in the Coastal Urban Area
Yang, Sung-Il ; Kang, Dong-Hwan ; Kwon, Byung-Hyuk ; Kim, Byung-Woo ;
Journal of Environmental Science International, volume 19, issue 3, 2010, Pages 295~304
DOI : 10.5322/JES.2010.19.3.295
Actual evapotranspiration (AET) in the Suyeong-gu was estimated and correlations between AET and meteorological factors were analyzed. The study area was Suyeong-gu lay at the east longitude
05' 40" ~ 129
08' 08" and north latitude
07' 59" ~
11' 01". The Kumryun mountain, the Bae mountain, the Suyeong river and the Suyeong bay are located on west, north, northeaster and south side in the study area, respectively. AET was estimated using precipitation (P), potential evapotranspiration (PET) and plant-available water coefficient. Meteorological factors to estimate PET were air temperature, dewpoint temperature, atmospheric pressure, duration of sunshine and mean wind speed (MWS). PET and AET were estimated by a method of Allen et al. (1998) and Zhang et al. (2001), respectively. PET was the highest value (564.45 mm/yr) in 2002 year, while it was the lowest value (449.95 mm/yr) in 2003 year. AET was estimated highest value (554.14 mm/yr) in 2002 year and lowest value (427.91 mm/yr) in 2003 year. Variations of PET and AET were similar. The linear regression function of AET as PET using monthly data was AET=0.87
PET+3.52 and coefficient of determination was high, 0.75. In order to analyze relationship between the evapotranspiration and meteorological factors, correlation analysis using monthly data were accomplished. Correlation coefficient of AET-PET was 0.96 high, but they of AET-P and PET-P were very low. Correlation coefficients of AET-MWS and PET-MWS were 0.67 and 0.73, respectively. Thus, correlation between evapotranspiration and MWS was the highest among meteorological factors in Suyong-gu. This means that meteorological factor to powerfully effect for the variation of evapotranspiration was MWS. The linear regression function of AET as MWS was AET=84.73
MWS+223.05 and coefficient of determination was 0.54. The linear regression function of PET as MWS was PET=83.83
MWS+203.62 and coefficient of determination was 0.45.
Comparisons on Relative Growth of Red Pine, Black Pine and Pitch Pine by Means of Multiple Regression
Park, Man-Choon ; Lee, Yun-Keun ; Choi, Kee-Ryong ;
Journal of Environmental Science International, volume 19, issue 3, 2010, Pages 305~312
DOI : 10.5322/JES.2010.19.3.305
The purpose of this study is to compare the relative growth of annual ring width of red pine(Pinus densiflora), black pine(Pinus thunbergii) and pitch pine(Pinus rigida) by means of multiple regression method according to Graybill hypothesis. The obtained results are as follows. 1. The changes of rainfall have affected to tree growth during the periods of 1975 through 1978. 2. Among these pine trees, red pine was mostly influenced by environmental factors. 3. The growth of annual ring width was sensitively responded to the changes of rainfall and air temperature. 4. Among the heavy metals analyzed, the concentrations(ppm) of Lead(Pb) and Copper(Cu) were negatively effected on the growth of annual ring width of pine trees. 5. The analytical technique of annual ring width may be useful for estimation of the pollution in forest areas near industrial complexes.
A Study of Emission Volume of Air Pollutants in Suwon City
Cho, Ki-Chul ; Whang, Kyung-Chul ;
Journal of Environmental Science International, volume 19, issue 3, 2010, Pages 313~321
DOI : 10.5322/JES.2010.19.3.313
This study was carried out to investigate the emissions of the air pollutants from the automobile in Suwon city. To estimate emissions due to by automobile the data of express highway and the national road used an observation traffic volume, and the other roads used a method by Vehicle kilometer traveled(VKT). In the emissions due to by automobile from Suwon city, CO was highest 36,290.4 ton/year, NOx at 19,392.1 tons, HC 5,095.4 tons and PM 2,788.7 tons was highly order. SOx emissions in the whole Suwon city by fuel types was investigated with 178ton/year from the Diesel motorcar, 26.9 ton/year and 6.2 ton/year from the gasolines and LPG automobiles, respectively. VOC emissions from the automobile was investigated with 366.4 ton/year (29.22%) from Gwonseon-gu, 329.2 ton/year (26.25%) Yeongtong-gu, 319.9 ton/year (25.51%) Jangan-gu, 238.6 ton/year (19.03%) Paldal-gu.
The Effect of Reject Water on the Water Quality of Effluent from S Sewage Treatment Plant
Kim, Mi-Ran ; Kim, Kyoung-Hee ; Park, Hae-Sik ; Kang, Dong-Hyo ; Lee, Jea-Keun ;
Journal of Environmental Science International, volume 19, issue 3, 2010, Pages 323~329
DOI : 10.5322/JES.2010.19.3.323
To acquire preliminary data for the control of total nitrogen (TN) in S sewage treatment plant, which processes merging food waste and sewage, the effect of reject water on the total nitrogen in the effluent was examined in this study. Water quality data for the plant during the winter period were applied to calculate the mass balance. It was calculated that at least more than 231 kg/d TN should be removed to control the TN concentration in the effluent. Assuming 18 ppm as the goal TN concentration in the effluent, about 941 kg/d TN should be removed from this plant. Approximately 10% more TN should be removed than at present to achieve this result. It was observed that dewatering the filtrate had a considerably greater effect on the total nitrogen in the effluent than the reject waters. The dewatered filtrate contained 1,399kg/d TN. The contribution of the dewatered filtrate to the TN concentration in the effluent was 0.183, which was 7 to 23 times greater than the other reject waters. In addition, the amount of total nitrogen from the reject water, with the exception of the dewatering filtrate, was lower than the amount of TN that should be removed from S sewage treatment plant. Therefore, it was concluded that one of the most effective methods for controlling the TN concentration in effluent was the removal of the TN contained in the dewatering filtrate.
Physical Characteristics of Aerosol Concentrations Observed in an Urban Area, Busan
Kim, Yun-Jong ; Kim, Cheol-Hee ;
Journal of Environmental Science International, volume 19, issue 3, 2010, Pages 331~342
DOI : 10.5322/JES.2010.19.3.331
Aerosol physical properties have been measured at Pusan National University by using the 16-channel LPC(Laser Particle Counter), and particle characteristics have been examined for the period from Aug. 4 2007 to Dec. 30, 2008. Annual total average, seasonal average, and other averages of the meteorologically classified four categories such as Asian dust, precipitation, foggy, and clear days are respectively described here. Both annually and seasonally averaged number concentration show three peaks at the particle diameter of 0.3, 1.3, and
, respectively. However, the first peak for summer season tends to be shifted toward smaller size than other seasons, implying the strong fine particle generation. Meteorological condition shows strong contrast in aerosol concentrations. In Asian dust case, relatively lower number concentrations of fine particles (i.e., smaller than
) were predominant, while higher concentrations of coarse particles were found particularly for the size bigger than
. In precipitation day, number concentrations were decreased by approximately 30% due to the removal process of precipitation. Foggy day shows significantly higher concentrations for fine particles, implying the importance of the aerosol condensation process of micro-fine-particle growing to fine-particle. Finally the regressed particle size distribution function was fitted optimally with two log-normal distribution, and discussed the similarities and differences among four categorized cases of the Asian dust, precipitation, foggy, and clear days.
The Effect of Natural Exploration Activity on Environmental Perception of the Science High School Students
Kim, Soon-Shik ; Choi, Sung-Bong ;
Journal of Environmental Science International, volume 19, issue 3, 2010, Pages 343~351
DOI : 10.5322/JES.2010.19.3.343
Since the effect of environmental education at class using textbooks or materials related to environment is limited, the importance of activities for field experience is getting increased day by day. Thereby, the education tends to change into the type of education providing students with direct environmental experience. Students attending the science high school have excellent aptitude and ability for science and will lead the development of science in the future. Now it is urgent to develop various experiential programs which are helpful for them to establish desirable values on environment. However, the field of environmental education that allows science high school students equipped with ample environmental knowledge to improve environment sensitivity and have proper environment awareness is quite restricted as of now. Natural exploration activities are the programs which provide science high school students having lack of chance for environmental education with good opportunities to contact nature and also play significant roles in arousing their interest in issues related with environment. Therefore, it is thought that they will let science high school students explore the natural features of Korea, understand the importance of preserving environment and ecosystem profoundly, and encourage environmental awareness and will of environmental practice. Thereupon, with the study subjects of 121 first and second graders at U Science High School, this article analyzed their recognition of the necessity for environmental education and environmental pollution problems before and after the natural exploration activities, and conducted a survey on their satisfaction after the natural exploration activities and analyzed it. The result of this research is as follows. First, it was shown that the natural exploration activities were effective to raise the science high school students' awareness of issues related with environmental pollution. Second, the natural exploration activities had effect upon enhancing the students' willingness of environmental practice. Third, there was statistically significant correlation between the science high school students' satisfaction with the natural exploration activities and their achievement in the science subject. Fourth, there also was a statistically non or weakness significant correlation between their satisfaction with the natural exploration activities and preference for the science subject. In particular, it was found that students preferring biology indicated higher satisfaction.
An Estimation of Amount of Damage Using the 3-second Gust When the Typhoon Attack
Jung, Woo-Sik ; Park, Jong-Kil ; Choi, Hyo-Jin ;
Journal of Environmental Science International, volume 19, issue 3, 2010, Pages 353~363
DOI : 10.5322/JES.2010.19.3.353
The most efficient measures to reduce damage from natural disasters include activities which prevent disasters in advance, decrease possibility of disasters and minimize the scale of damage. Therefore, developing of the risk assessment model is very important to reduce the natural disaster damage. This study estimated a typhoon damage which is the biggest damage scale among increased natural disasters in Korea along with climate change. The results of 3-second gust at the height of 10m level from the typhoon 'Maemi' which did considerable damage to Korean in 2003, using the wind data at the height of 700 hPa. September 12th 09 LST~13th 12 LST period by the time a typhoon Maemi approached to the Korean peninsula. This study estimate damage amount using 'Fragility curve' which is the damage probability curve about a certain wind speed of the each building component factors based on wind load estimation results by using 3-second gust. But the fragility curve is not to Korea. Therefore, we use the fragility curves to FPHLM(FDFS, 2005). The result of houses damage amount is about 11 trillion 5 million won. This values are limit the 1-story detached dwelling,
of total area. Therefore, this process is possible application to other type houses.
A Study on Recycling of EPDM Reclaimed Rubber
Jang, Doo-Hee ; Kim, Ji-Hoon ; Kim, Young-Ju ;
Journal of Environmental Science International, volume 19, issue 3, 2010, Pages 365~370
DOI : 10.5322/JES.2010.19.3.365
In this study, we carried out the evaluation of EPDM(Ethylene Propylene Diene Monomer) reclaimed rubber mixing with natural rubber at various mixing ratio to reuse as rubber filler. The scorch time and moony viscosity was analyzed to evaluate the effect of cure behavior. And also, we analyzed the tensile strength, the elongation at break and cure time to evaluate the variation of cure behavior. As the results, the scorch time and optimal cure time was decreased according to the increasing of EPDM reclaimed rubber. However, the moony viscosity was increased at each mixing ratio. In case of the added EPDM reclaimed rubber was 20 phr(parts by weight per 100 parts by weight of rubber), the hardness and specific gravity was increased a little. The hardness and specific gravity was increased in rapidly under 40 phr of the added EPEM reclaimed rubber. The tensile strength and elongation at break of the compound of natural and EPDM reclaimed rubber was rapidly decreased compared with its natural rubber when the ratio of adding EPDM reclaimed rubber was over 40 phr.
Treatment of Dyeing Wastewater by Magnetic-Biological Treatment System
Lee, Seon-Ha ;
Journal of Environmental Science International, volume 19, issue 3, 2010, Pages 371~377
DOI : 10.5322/JES.2010.19.3.371
The purpose of this study is to investigate treatment efficiency in dyeing wastewater treatment by the high rate aeration system(HRA) and a combination of the HRA with magnetized wastewater treatment system(MWS). At the hydraulic retention time of 16hr, 24hr, 30hr, BOD removal efficiencies of HRA system were 93%, 96% and 98%, combination of the HRA with MWS system were 94%, 96.8% and 98.2%, respectively. In ease of COD, at the hydraulic retention time of 16hr, 24hr, 30hr, COD removal efficiencies of HRA system were 66%, 77.1% and 83.1%, combination of the HRA with MWS system were 70.2%, 80.1% and 86.6%, respectively. The comparison of the HRA and combination of the HRA with MWS, effluent BOD of the former was 22.7mg/
and the latter was 19.4mg/
, theretore biological treatment efficiency identified to increase by the MWS.
The Effect of Different Particle Size from PAHs Contaminated Sediment by Ultrasonic Irradiation
Na, Seung-Min ; Khim, Jee-Hyeong ; Cui, Ming-Can ; Ahn, Yun-Gyong ; Weavers, Linda K. ;
Journal of Environmental Science International, volume 19, issue 3, 2010, Pages 379~387
DOI : 10.5322/JES.2010.19.3.379
Sediments of Little Scioto (LS) River in Ohio was contaminated by poor disposal of creosote from Baker Wood Creosoting Facility. Among the primary compounds of creosote, Polycyclic Aromatic Hydrocarbons (PAHs) are the most common ingredient PAHs are known for toxic, carcinogenic and mutagenic compounds. There are many difficulties to remove the PAHs in nature environment because their characteristics are having a less water-solubility, volatile and low mobility properties as increasing the molecular weight. The generation of hydroxyl radicals (
) and hydrogen peroxide (
) forms as well as high temperature (5000 K) and pressure (1000 atm) by a physico-chemical effects of ultrasound during a cavitation collapse can promote the degradation and desorption of PAHs in sediment And it can also produces shock wave and microjets which are able to change the size and surface of particle in solid-liquid system as one of physical effects. Therefore, we explored to understand the role of particle size, the effect of elimination for PAHs concentration by ultrasound and optimize the conditions for ultrasonic treatment. The condition of various size of particles (>
) and solid-liquid ratio (12.5g/L, 25g/L) for the treatment was considered and ultrasonic power (430 W/L) with liquid - hexane extraction and microwave extraction method were applied after ultrasound treatment.