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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
Biosynthesis and Control of Keratinase in Recalcitrant Feather-Degrading Bacillus megaterium F7-1
Jeong, Jin-Ha ; Lee, Na-Ri ; Jeon, Young-Dong ; Kim, Jeong-Do ; Park, Ki-Hyun ; Park, Geun-Tae ; Son, Hong-Joo ;
Journal of Environmental Science International, volume 19, issue 9, 2010, Pages 1077~1082
DOI : 10.5322/JES.2010.19.9.1077
This study was performed to investigate the nutritional conditions controlling keratinase activity in Bacillus megaterium F7-1. B. megaterium F7-1 produced keratinase using chicken feather as a sole source of carbon, nitrogen and sulfur. Addition of the feather medium with glucose enhanced keratinase production (68.9 U/ml), compared to control without glucose (63.2 U/ml). The synthesis of keratinase was repressed by addition of
in B. megaterium F7-1. The highest keratinase production (70.9 U/ml) was obtained with the feather medium containing glucose and
. Keratinase was produced in the absence of feather (4.9 U/ml), indicating its constitutive synthesis. Feather degradation resulted in free SH group formation. B. megaterium F7-1 effectively degraded chicken feather meal (86%), whereas duck feather, human nail, human hair and sheep wool displayed relatively low degradation rates (8-34%).
The Origin of Food Sources for Nuttallia olivacea and Nereidae by Fatty Acid Analysis
Shin, Woo-Seok ; Kim, Boo-Gil ;
Journal of Environmental Science International, volume 19, issue 9, 2010, Pages 1083~1092
DOI : 10.5322/JES.2010.19.9.1083
The spatial variability in the food chain structure of an estuary environment (Nanakita estuary, Japan) was investigated using fatty acid. Potential organic matter sources (terrestiral plants, macroalgae, benthic microalgae, dinflagellates and bacteria), sedimentary organic matters and benthic invertebrates (Nuttallia olivacea and Nereidae) were sampled in four locations with different tidal flat type. The main objective of the present study was to determine the origin of sediment and the food sources of N. olivacea and Nereidae along with small-scale spatial variability. The origin of sedimentary organic matters were mainly the fatty acid of bacteria and benthic microalgae. Especially, The organic matter of terrestrial plant origin was found the highest in station C. The diets of N. olivacea and Nereidae were found to be dominated by diatoms and terrestrial plants. Whereas, macroalgae and dinoflagellates showed little influence to benthic invertebrates. Moreover, according to principal component analysis, it is showed that benthic invertebrates in the same region are using the same food without relation with species. On the other hand, the N. olivacea and Nereidae of station D clearly contrasts with station B in terms of main food sources. From these results, it is suggested that food competition of benthic invertebrates revealed high a connection between small-scale spatial variability and food source in estuary.
A Study on Degradation Characteristic and Flow Behavior in De-NOx Catalyst
Hwang, Seung-Min ;
Journal of Environmental Science International, volume 19, issue 9, 2010, Pages 1093~1101
DOI : 10.5322/JES.2010.19.9.1093
In this study, the indirect correlation of degradation characteristic and flow behavior in the de-NOx catalyst is investigated experimentally. The inner flow behavior in the de-NOx catalyst is varied from turbulent flow to laminar flow and the degradation of the de-NOx catalyst is remarkably affected by the inner flow. The degradation of the catalyst is increased in the upstream region near the inlet because injected turbulent flow enhances the adhesion of ash particle on the catalyst surface. The degradation of the catalyst near the inlet also governs the overall efficiency of the catalyst. The amount of adhered ash particles on the catalyst surface decreases as they progress downstream. This is due to the inner flow transition from turbulent flow to laminar flow.
Comparison of Thermal Environment and Biotope Area Rate according to Land Cover Types of Outside Space of School located in Chung-ju
Ju, Jin-Hee ; Ban, Jong-Heu ; Yoon, Yong-Han ;
Journal of Environmental Science International, volume 19, issue 9, 2010, Pages 1103~1108
DOI : 10.5322/JES.2010.19.9.1103
This study was conducted to be used as basic data of environmental friendly construction planning by comparing and analyzing thermal environment, find particles and biotope area rate according to land cover types of outside space of schools located in Chung-ju. When meteorological factors were analyzed according to land cover types, for temperature planting area and paved area showed low-and high-temperature ranges, respectively, and relative humidity was negatively related with temperature as low-and high-temperature ranges corresponded to high-and low-humidity ranges, respectively. For Wet Bulb Globe Temperature Index (WBGT) by land cover types, it was observed to be artificial grass> bare land> natural grass. Find particles were different according to land cover types of playground with being bare land> artificial grass> natural grass in the order. Bare land playground, where there were artificial factors and no absorption of fine particles through stomata of leaves as a function of natural circulation, recorded the highest level of
and the level was relatively higher compared to the levels by season in Chung-ju. Biotope area rate showed the order of M elementary school> K elementary school> C commercial high school. That was considered to be caused by the difference of land cover type of school playground accounting for a large part of a school.
Characteristics of Precipitation and Temperature at Ulleung-do and Dok-do, Korea for Recent Four Years(2005~2008)
Lee, Young-Gon ; Kim, Baek-Jo ; Park, Gil-Un ; Ahn, Bo-Young ;
Journal of Environmental Science International, volume 19, issue 9, 2010, Pages 1109~1118
DOI : 10.5322/JES.2010.19.9.1109
Characteristics of precipitation and temperature in Ulleung-do and Dok-do were analyzed with hourly accumulated precipitation and mean temperature data obtained from Automatic Weather System(AWS) for latest four years(2005~2008). In Ulleung-do, total annual mean precipitation for this period is 1,574.4 mm, which shows larger amount than 1434.2 mm of whole Korean peninsula for latest 10 years(1999~2008) and 1,236.2 mm at Ulleung-do on common years(1971~2000), shows that the trend of precipitation gradually increases during the recent years. This amount is also 1.4 times larger than the total annual mean precipitation of 660.1 mm in Dok-do. Mean precipitation intensity(mm
) at each time of a day in each month at Ulleung-do represents that the maximum values larger than
were shown in May and on 0200 LST, whereas these were found in August and 0700 LST with
in Dok-do. The difference of the precipitation amount and its intensity between Uleung-do and Dok-do is explained by the topological effect came from each covering area, and this fact is also identified from similar comparison of the precipitation characteristics for the islands in West Sea. The annual mean temperature of
in Dok-do is
higher than that of
in Ulleung-do. Trends of monthly mean temperature in both islands are shown to increase for the observed period.
A Study on the Cu
Behavior in Activated Sludge Process
Park, Jin-Do ; Lee, Hak-Sung ;
Journal of Environmental Science International, volume 19, issue 9, 2010, Pages 1119~1127
DOI : 10.5322/JES.2010.19.9.1119
The behavior of copper throughout the whole process of wastewater treatment plant that uses the activated sludge process to treat the wastewater of petrochemical industry that contains low concentration of copper was investigated. Total inflow rate of wastewater that flows into the aeration tank was
/day with 0.369 mg/L of copper concentration, that is, total copper influx was 257.2 g/day. The ranges of copper concentrations of the influent to the aeration tank and effluent from the one were 0.315 ~ 0.398 mg/L and 0.159 ~ 0.192 mg/L, respectively. The average removal rate of copper in the aeration tank was 50.8 %. The bioconcentration factor (BCF) of copper by microbes in the aeration tank was 3,320. The accumulated removal rate of copper throughout the activated sludge process was 71.3%, showing a high removal ratio by physical and chemical reactions in addition to biosorption by microbes. The concentration of copper in the solid dehydrated by filter press ranged from 74.8 mg/kg to 77.2 mg/kg and the concentration of copper by elution test of waste was 2.690 ~ 2.920 mg/L. It was judged that the copper concentration in dehydrated solid by bioconcentration could be managed with the control of that in the influent.
Planting Status and Improvement Plan of School Forest in the Elementary Schools at Chung-ju City
Ju, Jin-Hee ; Kim, Won-Tae ; Kuk, Ji-Ha ; Yoon, Yong-Han ;
Journal of Environmental Science International, volume 19, issue 9, 2010, Pages 1129~1136
DOI : 10.5322/JES.2010.19.9.1129
This study investigated the status of planting status of school's flower of 11 elementary schools located in Chung-ju and its results were as follows. Totally 3,502 trees were planted in the 11 schools and the number of species of the trees was 103. For tall tree Thuja orientalis was planted most frequently and for shrub Buxus microphylla was done in the largest number of the schools. In addition, the number of trees planted in a school was averagely two times more in the model schools than in the other ones, and the average number of species of trees was also over three times more in the model schools. When the number of species of trees was examined according to their types, decidous broad leaved tree was found most frequently overall and the model schools had more various species of decidous tree compared to the other ones. Investigation on designation of school's flower and tree with the 11 elementary school, revealed similar results with those of previous studies performed with the schools in other areas and the tendency meant that the designation was uniform to some degree. Moreover, as only a few school's flower and tree were planted or no one was done in some schools, the species of school's flower and tree needed to be determined by considering characteristics and school percepts of a school as well as local features and circumstances of a region. In addition, more efforts should be made to infuse love for school and to improve quality of education by increasing the planting rate of school's flower and tree and by focusing them.
Evaluation on Adaptation of Zosia japonica as Effected by Different Green Roof System under Rainfed Conditon
Ju, Jin-Hee ; Kim, Won-Tae ; Choi, Woo-Young ; Yoon, Yong-Han ;
Journal of Environmental Science International, volume 19, issue 9, 2010, Pages 1137~1142
DOI : 10.5322/JES.2010.19.9.1137
This study proposes a guideline of a green roof system suitable for the local environment by verifying the growth of Zoysia japonica in a shallow, extensive, green roof system under rainfed condition. The experimental soil substrates into which excellent drought tolerance and creeping Z. japonica was planted were made with different soil thicknesses(15cm, 25cm) and soil mixing ratios(SL,
). The plant height, green coverage ratio, fresh weight, dry weight and chlorophyll contents of Z. japonica were investigated. For the soil thickness of 15cm, the plant height of Z. japonica was significantly as affected by the soil mixing ratio and it was shown in the order SL=
. For the soil thickness of 25cm, the plant height was increased in order to SL <
. The green coverage ratio was not observed by soil the mixing ratio or soil thickness. However, the green coverage ratio was 86~90% with a good coverage rate overall. The chlorophyll contents of Z. japonica were not significantly affected by the soil mixing ratio in the soil thickness of 15cm, but were higher in the natural soil than in the artificial soil at 25cm soil thickness. The fresh weight and dry weight of Zoysia japonica were heavier in the 25cm thickness than in the 15cm thickness and in the artificial soil mixture than in the natural soil. The result indicated that the growth of Zoysia japonica was more effective in the 25cm soil thickness with artificial soil than in the 15cm soil thickness with natural soil in the green roof system under rainfed condition.
Effects of Operating Parameters on Electrochemical Degradation of Rhodamine B and Formation of OH Radical Using BDD Electrode
Park, Young-Seek ; Kim, Dong-Seog ;
Journal of Environmental Science International, volume 19, issue 9, 2010, Pages 1143~1152
DOI : 10.5322/JES.2010.19.9.1143
The purpose of this study is to degradation of Rhodamine B (RhB, dye) and N, N-Dimethyl-4-nitrosoaniline (RNO, indicator of the electro-generation of OH radical) in solution using boron doped diamond (BDD) electrode. The effects of applied current (0.2~1.0 A), electrolyte type (NaCl, KCl, and
) and electrolyte concentration (0.5~3.0 g/L), solution pH (3~11) and air flow rate (0~4 L/min) were evaluated. Experimental results showed that RhB and RNO removal tendencies appeared with the almost similar thing, except of current. Optimum current for RhB degradation was 0.6 A, however, RNO degradations was increased with increase of applied current. The RhB and RNO degradation of Cl type electrolyte were higher than that of the sulfate type. The RhB and RNO degradation were increased with increase of NaCl concentration and optimum NaCl dosage was 2.5 g/L. The RhB and RNO concentrations were not influenced by pH under pH 7. Optimum air flow rate for the oxidants generation and RhB and RNO degradation were 2 L/min. Initial removal rate of electrolysis process was expressed Langmuir - Hinshelwood equation, which is used to express the initial removal rate of UV/
Probability Distribution of BOD EMC from Paddy Fields
Jin, So-Hyun ; Jung, Jae-Woon ; Yoon, Kwang-Sik ; Choi, Woo-Jung ; Choi, Dong-Ho ; Kim, Sang-Don ; Kang, Jae-Hong ; Choi, Yu-Jin ;
Journal of Environmental Science International, volume 19, issue 9, 2010, Pages 1153~1159
DOI : 10.5322/JES.2010.19.9.1153
Identification of probability distribution for water quality constituents from specific land use is important to achieve successful implementation of TMDL program. In this 3-year study, distribution of discharge and BOD(Biological Oxygen Demand) concentration from paddy rice fields were monitored. Four probability distributions, normal, log-normal, Gamma and Weibull were fitted and the goodness-of-fit was assessed using probability plots and Kolmogorov-Smirnov test.
of BOD in runoff from paddy field ranged 0.37 to
, and all four probability distributions were acceptable. But the normal distribution would be preferred for BOD from paddy fields considering nature of straight forward application.
Control of Enzymatic Degradability of Biodegradable Polylactide by Blending with Non-degradable Polymers
Jang, Seong-Ho ; Park, Sang-Bo ; Lee, Won-Ki ;
Journal of Environmental Science International, volume 19, issue 9, 2010, Pages 1161~1167
DOI : 10.5322/JES.2010.19.9.1161
The effects of addition of non degradable polymers, polystyrene (PS) and poly(methyl methacrylate) (PMMA) on the rate of enzymatic degradation of biodegradable poly(l-lactide) (PLLA) have been studied in term of surface structure. Since a component in multicomponent polymeric system has shown surface enrichment, PS and PMMA which have lower surface energy than PLLA were selected as a minor blend component (5 wt%). Enzymatic degradation was carried out at
and pH 8.5 in the aqueous solution of Proteinase K. Two blend systems, partially miscible (PS/PLLA) and immiscible (PMMA/PLLA), showed the surface enrichment of 4 and 2 times of PS and PMMA, respectively. From the weight loss profile data, the slow degradation rate of both blend films was observed. This indicates that PS or PMMA domains which exist at surface act as a retardant of enzymatic attack.
Case Study of Wind Farm Design Using OpenWind - Youngdeok Wind Farm
Kim, Hyun-Goo ; Hwang, Hyo-Jeong ; Kim, Ju-Hyun ; Ko, Soo-Hee ; Jung, Woo-Sik ;
Journal of Environmental Science International, volume 19, issue 9, 2010, Pages 1169~1175
DOI : 10.5322/JES.2010.19.9.1169
A case study for the design of a wind farm in complex terrain was carried out using the wind farm site analysis software OpenWind, which has an open-source platform and is free to use. The Youngdeok Wind Farm, constructed on mountainous terrain in Korea, was chosen as a model site; the design process reproduced using OpenWind. A comparison of the positions of the wind turbine derived from the OpenWind optimization process and the current positions were in good agreement. The annual energy production predicted by OpenWind compared with the prediction by the micrositing software, WindSim, were also validated to within 1%. Therefore, it was confirmed that OpenWind can be used for a practical wind farm design project. It is also anticipating that this paper will provide a prototype process for the design of a wind farm site and offer a database for the post-evaluation of a constructed wind farm in Korea.
Comparison of Heavy Metal Adsorption between Pseudomonas cepacia H42 and Saccharomyces cerevisiae SEY2102
Park, Ji-Won ; Jeong, Yu-Jeong ; Ryu, Eun-Ju ; Kim, Byung-Woo ; Kwon, Hyun-Ju ; Lee, Eun-Woo ; Lee, Hyun-Tae ; Kim, Young-Hee ;
Journal of Environmental Science International, volume 19, issue 9, 2010, Pages 1177~1185
DOI : 10.5322/JES.2010.19.9.1177
To examine the potency of biosorbent, the adsorption capacity of Pseudomonas cepacia H42 isolated from fresh water plant root was compared with Saccharomyces cerevisiae SEY2102 on bases of biomass, concentration of heavy metal, presence of light metals, immobilized cell, and ion exchange resin. P. cepacia H42 biomass of 0.05-0.5 g/L increased adsorption and above 1.0 g/L of yeast biomass was the most effective in adsorption. By applying the same amount of biomass, lead showed the highest adsorption on two strains and the adsorption strength was lead>copper>cadmium on both strains. The high heavy metal concentration induced the high adsorption capacity. P. cepacia H42 adsorption was in the order of copper>lead>cadmium and lead>copper>cadmium by yeast in 10 mg/L. Both strain showed same adsorption strength in the order of lead>copper>cadmium in 100 mg/L and 1000 mg/L. The adsorption capacity of both yeast and P. cepacia H42 was decreased in the presence of light metals and the order of cadmium>copper>lead.
induced the least adsorption while
induced highest adsorption. The adsorption capacity of immobilized yeast and P. cepacia H42 was detected between 200-400 mL in flow volume and decreased in the presence of light metals. Ion exchange containing light metals caused 30-50% adsorption reduction on both strains.