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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
Determination of Optimum Coagulants (Ferric Chloride and Alum) for Arsenic and Turbidity Removal by Coagulation
Choi, Young-Ik ; Jung, Byung-Gil ; Son, Hee-Jong ; Jung, Yoo-Jin ;
Journal of Environmental Science International, volume 19, issue 8, 2010, Pages 931~940
DOI : 10.5322/JES.2010.19.8.931
The Raw water from Deer Creek (DC) reservoir and Little Cottonwood Creek (LCC) reservoir in the Utah, USA were collected for jar test experiments. This study examined the removal of arsenic and turbidity by means of coagulation and flocculation processes using of aluminum sulfate and ferric chloride as coagulants for 13 jar tests. The jar tests were performed to determine the optimal pH range, alum concentration, ferric chloride concentration and polymer concentration for arsenic and turbidity removal. The results showed that a comparison was made between alum and ferric chloride as coagulant. Removal efficiency of arsenic and turbidity for alum (16 mg/L) of up to 79.6% and 90.3% at pH 6.5 respectively were observed. Removal efficiency of arsenic and turbidity for ferric chloride (8 mg/L) of up to 59.5% at pH 8 and 90.6% at pH 8 respectively were observed. Optimum arsenic and turbidity removal for alum dosages were achieved with a 25 mg/L and 16 mg/L respectively. Optimum arsenic and turbidity removal for ferric chloride dosages were achieved with a 20 mg/Land 8 mg/L respectively. In terms of minimizing the arsenic and turbidity levels, the optimum pH ranges were 6.5 and 8for alum and ferric chloride respectively. When a dosage of 2 mg/L of potassium permanganate and 8 mg/L of ferric chloride were employed, potassium permanganate can improve arsenic removal, but not turbidity removal.
Electrochemical Detection of Pesticide in Living Plant and Fish Brain Cell
Lee, Chang-Hyun ; Ly, Suw-Young ;
Journal of Environmental Science International, volume 19, issue 8, 2010, Pages 941~949
DOI : 10.5322/JES.2010.19.8.941
The three electrode system was used to detect the pesticide fenitrothion (
. MW=277.24) using cyclic voltammetry (CV) and square wave anodic stripping voltammetry (SWASV). The working electrode was mercury immobilized on a carbon nanotube paste electrode (Hg-CNTPE). At the optimized condition, the limit of detection (LoD) was 0.6 ppt (
), and the relative standard deviation was 0.035% (n=15). And there is more sensitive in detecting fenitrothion than common type carbon nanotube paste electrode. When it was implanted into the brain of live fish (carp), the existence of fenitrothion was measured without any destruction or damage of tissue.
Electricity Generation and De-contamination Effect for Characteristic Electrode Material in a Microbial Fuel Cell System Using Bay Sediment
Kwon, Sung-Hyun ; Song, Hyung-Jin ; Lee, Eun-Mi ; Cho, Dae-Chul ; Rhee, In-Hyoung ;
Journal of Environmental Science International, volume 19, issue 8, 2010, Pages 951~960
DOI : 10.5322/JES.2010.19.8.951
Sediment works as a resource for electric cells. This paper was designed in order to verify how sediment cells work with anodic material such as metal and carbon fiber. As known quite well, sediment under sea, rivers or streams provides a furbished environment for generating electrons via some electron transfer mechanism within specific microbial population or corrosive oxidation on the metal surfaces in the presence of oxygen or water molecules. We experimented with one type of sediment cell using different anodic material so as to attain prolonged, maximum electric power. Iron, Zinc, aluminum, copper, zinc/copper, and graphite felt were tested for anodes. Also, combined type of anodes-metal embedded in the graphite fiber matrix-was experimented for better performances. The results show that the combined type of anodes exhibited sustainable electricity production for ca. 600 h with max.
Al/Graphite. Meanwhile, graphite-only electrodes produced max.
along with quite stationary electric output, and for a zinc electrode, in which the electricity generated was not stable with time, therefore resulting in relatively sharp drop in that after 100 h or so, the maximum power density was
. It was observed that the corrosive reaction rates in the metal electrodes might be varied, so that strength and stability in the electric performances(voltage and current density) could be affected by them. In addition to that, COD(chemical oxygen demand) of the sediment of the cell system was reduced by 17.5~36.7% in 600 h, which implied that the organic matter in the sediment would be partially converted into non-COD substances, that is, would suggest a way for decontamination of the aged, anaerobic sediment as well. The pH reduction for all electrodes could be a sign of organic acid production due to complicated chemical changes in the sediment.
The Effects of Recreation Forest Visitors' Satisfaction on Loyalty : A Case of 33 National Natural Recreation Forests
Jeon, Mun-Jang ; Sim, Kyu-Won ;
Journal of Environmental Science International, volume 19, issue 8, 2010, Pages 961~969
DOI : 10.5322/JES.2010.19.8.961
This study was carried out to analyze conceptional structure between visitor's satisfaction and loyalty in the national natural recreation forests. The results of this study showed that facility, natural resources and view, staff service of recreation forest had positive effect on visitor's satisfaction. Reservation system, accessibility, and usage fee of recreation forest was not related to visitor's satisfaction. In addition, visitor's satisfaction was found to have positive effect on visitor's loyalty such as revisiting intention and word of mouth. As a result, managers of recreation forest need to enhance visitor's satisfaction, to improve rate of revisiting intention and to incite word of mouth through building management strategy.
Identifications of Source Locations for Atmospheric Total Gaseous Mercury Using Hybrid Receptor Models
Lee, Yong-Mi ; Yi, Seung-Muk ; Heo, Jong-Bae ; Hong, Ji-Hyoung ; Lee, Suk-Jo ; Yoo, Chul ;
Journal of Environmental Science International, volume 19, issue 8, 2010, Pages 971~981
DOI : 10.5322/JES.2010.19.8.971
The objectives of this study were to measure ambient total gaseous mercury (TGM) concentrations in Seoul, to analyze the characteristics of TGM concentration, and to identify of possible source areas for TGM using back-trajectory based hybrid receptor models like PSCF (Potential Source Contribution Function) and RTWC (Residence Time Weighted Concentration). Ambient TGM concentrations were measured at the roof of Graduate School of Public Health building in Seoul for a period of January to October 2004. Average TGM concentration was
. TGM had no notable pattern according to season and meteorological phenomena such as rainfall, Asian dust, relative humidity and so on. Hybrid receptor models incorporating backward trajectories including potential source contribution function (PSCF) and residence time weighted concentration (RTWC) were performed to identify source areas of TGM. Before hybrid receptor models were applied for TGM, we analysed sensitivities of starting height for HYSPLIT model and critical value for PSCF. According to result of sensitivity analysis, trajectories were calculated an arrival height of 1000 m was used at the receptor location and PSCF was applied using average concentration as criterion value for TGM. Using PSCF and RTWC, central and eastern Chinese industrial areas and the west coast of Korea were determined as important source areas. Statistical analysis between TGM and GEIA grided emission bolsters the evidence that these models could be effective tools to identify possible source area and source contribution.
Numerical Study on Wind Resources and Forecast Around Coastal Area Applying Inhomogeneous Data to Variational Data Assimilation
Park, Soon-Young ; Lee, Hwa-Woon ; Kim, Dong-Hyeok ; Lee, Soon-Hwan ;
Journal of Environmental Science International, volume 19, issue 8, 2010, Pages 983~999
DOI : 10.5322/JES.2010.19.8.983
Wind power energy is one of the favorable and fast growing renewable energies. It is most important for exact analysis of wind to evaluate and forecast the wind power energy. The purpose of this study is to improve the performance of numerical atmospheric model by data assimilation over a complex coastal area. The benefit of the profiler is its high temporal resolution and dense observation data at the lower troposphere. Three wind profiler sites used in this study are inhomogeneously situated near south-western coastal area of Korean Peninsula. The method of the data assimilation for using the profiler to the model simulation is the three-dimensional variational data assimilation (3DVAR). The experiment of two cases, with/without assimilation, were conducted for how to effect on model results with wind profiler data. It was found that the assimilated case shows the more reasonable results than the other case compared with vertical observation and surface Automatic Weather Station(AWS) data. Although the effect of sonde data was better than profiler at a higher altitude, the profiler data improves the model performance at lower atmosphere. Comparison with the results of 4 June and 5 June suggests that the efficiency with hourly assimilated profiler data is strongly influenced by synoptic conditions. The reduction rate of Normalized Mean Error(NME), mean bias normalized by averaged wind speed of observation, on 4 June was 28% which was larger than 13% of 5 June. In order to examine the difference in wind power energy, the wind power density(WPD) was calculated and compared.
Toxic Effects of Fungicide Tebuconazole on the Early Development of African Clawed Frog, Xenopus laevis
Hwang, Yong-Gi ; Lee, Mi-Ju ; Lee, You-Hwa ; Cheong, Seon-Woo ; Yoon, Chun-Sik ;
Journal of Environmental Science International, volume 19, issue 8, 2010, Pages 1001~1012
DOI : 10.5322/JES.2010.19.8.1001
We investigated the toxic effects of tebuconazole on development in the African clawed frog, Xenopus laevis. To test the toxic effects, frog embryo teratogenesis assays using Xenopus were performed. Embryos were exposed to various concentrations of tebuconazole(
for tebuconazole was
, and the
determined by probit analysis was
. The exposure to tebuconazole concentrations
resulted in 11 different types of severe external malformations including gut dysplasia. Histological examinations revealed various dysplasia in the eye, heart, liver, intestine, somatic muscle, and in the pronephric ducts. The tissue-specific toxic effects were investigated with an animal cap assay. Blood cells are generally induced at a high frequency by the combination of mSCF and activin A, however, the induction of blood cells was strongly inhibited by the addition of tebuconazole. Electron micrographs of tested embryos showed many of multivesicular bodies and dysplasia of photo-receptive cell, however, the somatic muscle degeneration was not severe. The gene expression of cultivated animal cap explants was investigated by reverse transcriptase-polymerase chain reaction and revealed that expression of the blood-specific marker,
globin II and muscle-specific marker, muscle actin were more strongly inhibited than the neural-specific marker, XEn2.
Characteristics of Spacio-Temporal Variation for PM
Concentration in Busan
Jeon, Byung-Il ;
Journal of Environmental Science International, volume 19, issue 8, 2010, Pages 1013~1023
DOI : 10.5322/JES.2010.19.8.1013
The purpose of this study was to analyze the characteristics of spacio-temporal variation for
concentration in Busan.
concentration has been reduced for the past three year and exceeded
of the national standard for
concentration showed gradual decrease or stagnant trends and exceeded the U.S. EPA standard. Seasonal analysis of
suggested spring>winter>fall>summer(by Asian dust) and winter>spring>summerenlifall(by anthropogenic effect) in the order of high concentration, respectively. Characterization of diurnal variations suggests that
levels at all the three sites consistently exhibited a peak at 1000LST and
at Jangrimdong experienced the typical
diurnal trends such that a peak was observed in the morning and the lowest level at 1400LST. In the case of seasonal trends, the
ratio was in the order of summer>winter>fall>spring at all the study sites, with a note that spring bears the lowest concentration. During AD events,
concentration exhibited the highest level at Jangrimdong and the lowest level at Joadong. And
ratio in AD was 0.16~0.28.
Changes of Landuse for Eight Years(1999~2007) in Greenbelt Area, Seoul
Choi, Jin-Woo ; Lee, Kyong-Jae ; Noh, Tai-Hwan ; Min, Sung-Hwan ;
Journal of Environmental Science International, volume 19, issue 8, 2010, Pages 1025~1034
DOI : 10.5322/JES.2010.19.8.1025
This study was to analyze changes of landuse and environmental value of cultivate land for eight years from 1999 to 2007 year in greenbelt area, Seoul. Greenbelt area decreased from
in 1999 to
in 2007 according to removal policy. Regarding landuse status in 2007, forest field area accounted for 64.16 %, dry paddy area 4.10 %, facilitated farming area 3.82 %, rice paddy area 2.95 % out of total greenbelt area. Cultivate land occupied wide spaces with dry paddy area, facilitated farming area, tree nursery in Seocho-gu, Gangnam-gu and Gangdong-gu. Changes of landuse were serious in Seocho-gu. The trend of changes of landuse for eight years is that rice paddy area was changed dry paddy area by laying the ground and dry paddy area was changed facilitated farming area for intensive agriculture. Rice paddy area could change without permission by laying the ground in below 50 cm height and it was changed to green houses due to increase in profit and modern policy of agriculture. It is nessary to monitor landuse regularly, improve regulation for change of landuse, compensate a property loss for maintaining environmental value in greenbelt area.
Distribution of the Vegetation and Insects of Coastal Dunes in Yangyang
Han, Gab-Soo ;
Journal of Environmental Science International, volume 19, issue 8, 2010, Pages 1035~1046
DOI : 10.5322/JES.2010.19.8.1035
The purpose of this study is to investigate distribution of the vegetation and insects of coastal dunes in the Yangyang area. The field survey was carried out Osan and Dongho coastal dunes during the period from June to July 2008. A total of 68 taxa were identified including 30 families, 60 genera, 59 species, and 9 varieties. 1 species(Glehnia littoralis) was recorded as designated rare plant of Korea Forest Service. The naturalized plants were 8 families, 13 species. The urbanization rate of naturalization index was 4.8% and 19.1% respectively. The land insect appeared with the 10 order, 23 families including 10 Korean specific species and 16 environmental indicator species for coastal dune. The species in Order Coleoptera was most, followed by Hemiptera, Orthoptera and Odonata respectively.
Ecological Characteristics of Papaver radicatum var. pseudoradicatum Population on Mt. Changbai in China
Ahn, Young-Hee ; Cui, Jian ; Cui, Xun ; Lee, Sang-Hyun ; Jin, Ying-Hua ; Choe, Chang-Yong ; Lee, Kyung-Mee ;
Journal of Environmental Science International, volume 19, issue 8, 2010, Pages 1047~1055
DOI : 10.5322/JES.2010.19.8.1047
This research conducted a vegetation survey on Mt. Changbai which are habitats of Papaver radicatum var. pseudoradicatum to obtain a basic data for artificial cultivation. The habitas of P. radicatum var. pseudoradicatum consisted of two communities as Dryas octopetala var. asiatica community and Aconogonon ajanense community. The community units as D. octopetala var. asiatica community and A. ajanense community belong to alpine vegetation in Mt. Changbai. A. ajanense community is distributed around altitude of 2007-2061m, and D. octopetala var. asiatica community is distributed altitude of 2350-2570m at relatively high elevation. According to the correlation between the vegetation structure and elevation. This vegetation structure can be simplified at the herb layer. The vegetation is classified into D. octopetala var. asiatica community and A. ajanense community on the axis 1 basis in the BC ordination analysis. Further, there appeared higher plant life totalling to 40 taxa comprising 35 species, 4 varieties and 1 forma with 20 families and 34 genuses at the whole survey area. Among these, Cyperaceae and Ericaceae plants excellent in resistance to environment was surveyed the most, accounting for 16%.
A Study on User Satisfaction by Perceived Performance of Ecological Learning Center
Park, Chung-In ; Kim, Jong-Hae ;
Journal of Environmental Science International, volume 19, issue 8, 2010, Pages 1057~1066
DOI : 10.5322/JES.2010.19.8.1057
An ecological learning center is defined as a place which can establish the correct relationship between human and environment. Human can learn ecosystem and importance of environment throughout observation of nature and participation in program of ecological learning center. The most important aspects of ecological learning center planning are to reflect on user's demand and preservation of ecosystem. The prime goals of this study is to analyze user's characteristics in the Young Wheol Mulmurigol Ecological Learning Center. The second goal of this study is to find out the satisfaction model based on user's perceived performance of each program and facility in the center. For this study, questionnaire survey with 204 individuals was completed. The data from the questionnaire were analyzed statistical method by SPSS. There are several significant results from the study as following First, this ecological learning center as a newly operating facility is used not for educational purpose but for resting and relaxation purpose. It is due to that the most of users in this center are package tourists with historic scenes. Second, user's perceived performance evaluated by 23 attributions of programs and facilities, and these attributions could be classified by 5 factors such as environment friendly design, educational function, preservation of environment, provision of various bio-top and provision of resting area. Third, the user satisfaction model indicates that user satisfaction is depended on various factors such as preservation of environment, provision of various bio-top, provision of resting area. Among these factor affecting the satisfaction, provision of various bio-top is the most influence on user satisfaction.
The Effect of Environmental Collage Making Class on Environmental Perception of the Gifted students
Kim, Soon-Shik ;
Journal of Environmental Science International, volume 19, issue 8, 2010, Pages 1067~1076
DOI : 10.5322/JES.2010.19.8.1067
How would environmental education be implemented for effectiveness today? Deep reflection on the way of teaching environment in classes to achieve effectiveness is required. If there exist differences in students' environmental perception depending on environment class pattern, its most effective way should be looked for. In environmental education, inducing the students to have advisable attitude voluntary about environment is more important than teaching them environmental knowledge. From such view, students' active participation is necessary for successful environmental classes. Students need to be set to share their principle, values, attitude about environment problems at environmental class through presentation which is important factor to make them have advisable environmental attitude. Therefore, environmental class need to be carried out student-led way. For that, a class model need to be designed which will be helpful for the students to arrange and elaborate their emitting thought about environment problems through disclosing their thoughts to share them with fellow students which will end up in their advisable environmental attitude. This study aimed to find out the effectiveness of environmental collage making class contributive to offering various environmental perception to students and grasping others' thinking about environment. Fifty-eight 10th graders at U Science High School in Ulsan metropolitan city were selected for the study that carried out from 2010 April to June by choosing total 10 environmental themes divided into environmental collage making class applied to the 30 test group students, and general environmental class applied to 28 control group students. Following are the study results. First, in students' environmental sensitivity, the students in the environmental collage making class appeared to be higher compared with them in general environmental class. Second, in students' intentional environment action, the students in the environmental collage making class appeared to be higher compared with them in general environmental class. Third, in students' satisfaction with environmental class, the students in the environmental collage making class appeared to be higher compared with them in general environmental class.