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권호별목차 / 소장처보기

H : 소장처정보

T : 목차정보

한국환경과학회지 = Journal of the environmental sciences 15건

  1. [국내논문]   Ecological Studies on the Vegetation of Castanea crenata Community and Both Sides  

    Huh, Man-Kyu (Division of Molecular Biology, Dongeui University ) , Cho, Joo-Soo (Division of Molecular Biology, Dongeui University ) , Jang, Gi-Bong (Division of Molecular Biology, Dongeui University)
    한국환경과학회지 = Journal of the environmental sciences v.17 no.1 ,pp. 1 - 6 , 2008 , 1225-4517 ,

    초록

    The characters of Castanea crenata community which is associated with human activities recently extended around the field of Saengbiryang-myeon at Sanseong-gun in Gyeongsangnam-do. The C. crenata community and its outskirts were investigated for several ecological parameters and the results can be summarized as fellows. C. crenata is prevailing in the plantation area, whereas Pinus densiflora and Quercus mongolica are prevailing in its outskirts. The mean species diversity of plantation was lower than that of natural forests. In stratification of investigated areas, overstory tree layer was dominant in the zone of plantation and dominant layers in the natural forest were understory tree layer, shrub, and herb. Plant biomass and net production which estimated from degree of green naturality were much higher in natural forests than those of the plantation community. Least significant differences (LSD) post hoc analysis revealed that P. densiflora and Q. mongolica community had significantly greater than densities than C. crenata community.

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  2. [국내논문]   Simultaneous Removal of H2S, NH3 and Toluene in a Biofilter Packed with Zeocarbon Carrier  

    Park, Byoung-Gi (Department of Chemical Engineering, POSTECH ) , Shin, Won-Sik (Department of Environmental Engineering, Kyungpook National University ) , Jeong, Yong-Shik (Environment & Energy Department, POSCO ) , Chung, Jong-Shik (Department of Chemical Engineering, POSTECH)
    한국환경과학회지 = Journal of the environmental sciences v.17 no.1 ,pp. 7 - 17 , 2008 , 1225-4517 ,

    초록

    Simultaneous removal of $NH_3,\;H_2S$ and toluene in a contaminated air stream was investigated over 185 days in a biofilter packed with Zeocarbon granule as microbial support. In this study, multi-microorganisms including Nitrosomonas and Nitrobacter for nitrogen removal, Thiobacillus thioparus (ATCC 23645) for $H_2S$ removal, and Pseudomonas aeruginosa (ATCC 15692), Pseudomonas putida (ATCC 17484) and Pseudomonas putida (ATCC 23973) for toluene removal were used simultaneously. The empty bed residence time (EBRT) was 40-120 seconds and the feed (inlet) concentrations of $NH_3,\;H_2S$ and toluene were 0.02-0.11, 0.05-0.23 and 0.15-0.21 ppmv, respectively. The observed removal efficiency was 85%-99% for $NH_3$ , 100% for $H_2S$ , and 20-90% for toluene, respectively. The maximum elimination capacities were 9.3, 20.6 and $17g/m^3/hr\;for\;NH_3,\;H_2S$ and toluene, respectively. The results of kinetic model analysis showed that there were no particular evidences of interactions or inhibitions among the microorganisms, and that the three bio degradation reactions took place independently within a finite area of biofilm developed on the surface of the Zeocarbon carrier.

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  3. [국내논문]   Total Phenolic Compounds and Flavonoids in the Parts of Artichoke (Cynara scolymus L.) in Viet Nam   피인용횟수: 2

    Thi, Bui Ha Thu (Department of Environmental Engineering and Architecture, Daegu Haany University ) , Park, Moon-Ki (Department of Environmental Engineering and Architecture, Daegu Haany University)
    한국환경과학회지 = Journal of the environmental sciences v.17 no.1 ,pp. 19 - 27 , 2008 , 1225-4517 ,

    초록

    Artichoke extracts are widely used alone or in association with other herbs for embittering alcoholic and soft drinks and to prepare herbal teas or herbal medicinal products in Viet Nam. The objective of this paper was a screening of flavonoids and total phenolic compounds content in the parts of artichoke (Cynara scolymus L.) as flowers, leaves, roots, trunks, stumps, The total phenolic compounds and flavonoids in the parts of artichoke were extracted among 3 extraction methods as methanol extraction (EM1), mixing methanol and water method (EM2) and water extraction method (EM3). Total phenolic compounds and flavonoids were determined by UV/VIS, HPLC techniques. The apigenin 7-O-glucosides, cynarin, narirutin, gallic acid, caffeic acid were found as the main flavonoids constituents in all parts of artichoke. It showed that value of total phenolic compounds and flavonoids by EM3 were higher than that of total phenolic compounds and flavonoids by EM1 and EM2. Furthermore, the results of this study revealed that total phenolic compounds and flavonoids, obtained by these convenient extraction methods, may show the quick efficacy of artichoke in all respects of their quality and quantity.

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  4. [국내논문]   마산만 오염 준설토사의 생태회복   피인용횟수: 2

    이찬원 (경남대학교 환경공학과 ) , 전홍표 (경남대학교 환경공학과 ) , 하경애 (경남대학교 환경공학과)
    한국환경과학회지 = Journal of the environmental sciences v.17 no.1 ,pp. 29 - 36 , 2008 , 1225-4517 ,

    초록

    A large amount of $2.1{\times}10^6m^3$ of polluted sediment was dredged from the Masan Bay and deposited in Gapo confined area, Masan, Korea. The six representative sediments were obtained and analyzed for issue components. The data was discussed with the species of benthos and their distribution. It was judged that toxicological effects of sediment analyzed ranged from ERL to ERM with copper and zinc, and ERL with cadmium, chrome, lead and nickel by the Adverse Biological Effects. The dredging index (DI) of sediments stabilized for 10 years since dumping the confined site was calculated and compared with the DI values of dredged sediment itself. DI values decreased from 0.67 to $0.07{\sim}0.18$ , which reflects DI value less than 0.2 is good for benthos in the sediment by the natural recovery of dredged materials. The ecological recovery was confirmed in this confined area as a habitat of benthic organisms.

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  5. [국내논문]   전기 펜톤-유사 반응을 이용한 Rhodamine B의 색 제거   피인용횟수: 1

    김동석 (대구카톨릭대학교 환경과학과 ) , 박영식 (대구대학교 보건환경)
    한국환경과학회지 = Journal of the environmental sciences v.17 no.1 ,pp. 37 - 44 , 2008 , 1225-4517 ,

    초록

    The electro-chemical decolorization of Rhodamine B (RhB) in water has been carried out by electro Fenton-like process. The effect of distance, material and shape of electrode, NaCl concentration, current, electric power, $H_2O_2$ and pH have been studied. The results obtained that decrease of RhB concentration of Fe(+)-Fe(-) electrode system was higher than that of other electrode system. The decrease of RhB concentration was not affected electrode distance and shape. Decolorization of electro Fenton-like reaction, which was added $H_2O_2$ onto the electrolysis using electrode was higher than electrolysis. Addition of NaCl decreased the electric consumption. The lower pH is, the faster initial reaction rate and reaction termination time observed.

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  6. [국내논문]   일부 미적용 다중이용시설의 실내 공기 중 알데히드류 및 휘발성유기화합물 노출로 인한 건강위해성 평가   피인용횟수: 3

    양지연 (연세대학교 환경공해연구소 ) , 김호현 (연세대학교 환경공해연구소 ) , 신동천 (연세대학교 의과대학 예방의학교실 ) , 김윤신 (한양대학교 환경 및 산업의학연구소 ) , 손종렬 (고려대학교 보건과학대학 ) , 임준환 (연세대학교 환경공해연구소 ) , 임영욱 (연세대학교 환경공해연구소)
    한국환경과학회지 = Journal of the environmental sciences v.17 no.1 ,pp. 45 - 56 , 2008 , 1225-4517 ,

    초록

    This study was to assess the lifetime cancer and non-cancer risk of exposure of worker and user at public facilities in Korea to volatile organic compounds (VOCs). We measured the concentrations of two aldehydes and five VOCs in indoor air at 424 public buildings that 8 kinds of public facilities (70 movie theaters, 86 offices, 86 restaurants, 70 academies, 22 auditoriums, 30 PC-rooms, 30 singing-rooms and 30 bars) all over the country. There were estimated the human exposure dose and risks with averages of the using-time and frequency for facility users and office workers, respectively. Carcinogens (formaldehyde, acetaldehyde, and benzene) were estimated the lifetime excess cancer risks (ECRs). non-carcinogens (toluene, ethylbenzene, xylene, and styrene) were estimated the hazard quotients (HQs). The average ECRs of formaldehyde and benzene for facility worker and user were $1{\times}10^{-3}{\sim}1{\times}10^{-4}\;and\;1{\times}10^{-4}{\sim}1{\times}10^{-5}$ level, respectively, in all facilities. HQs of four non-carcinogens did not exceed 1.0 for all subjects in all facilities. The estimated ECRs for restaurant and auditorium were the highest, and the PC-room and bar were the next higher facilities. Furthermore, people in a smoking facility had the highest cancer risk. Higher ECRs of formaldehyde and benzene were observed in indoor smoking facilities such as restaurant and auditorium. Higher HQs of toluene and xylene were observed at the restaurant and office building.

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  7. [국내논문]   경남 고성 구리광산 지역의 중금속 분산특성과 오염기준: 빈도분석과 확률도의 적용성   피인용횟수: 1

    나춘기 (목포대학교 환경공학과 ) , 박현주 (목포대학교 환경공학과)
    한국환경과학회지 = Journal of the environmental sciences v.17 no.1 ,pp. 57 - 66 , 2008 , 1225-4517 ,

    초록

    The frequency analysis and the probability plot were applied to heavy metal contents of soils collected from the Goseong Cu mine area as a statistic method for the determination of the threshold value which was able to partition a population comprising largely dispersed heavy metal contents into the background and the anomalous populations. Almost all the heavy metal contents of soil showed a positively skewed distributions and their cumulative percentage frequencies plotted as a curved lines on logarithmic probability plot which represent a mixture of two or more overlapping populations. Total Cu, Pb and Cd data and extractable Cu and Pb data could be partitioned into background and anomalous populations by using the inflection in each curve. The others showed a normally distributed population or an largely overlapped populations. The threshold values obtained from replotted frequency distributions with the partitioned populations were Cu 400 mg/kg, Pb 450 mg/kg and Cd 3.5 mg/kg in total contents and Cu 40 mg/kg and Pb 12 mg/kg in extractable contents, respectively. The thresholds for total contents are much higher than the tolerable level of soil pollution proposed by Kloke(Cu 100 mg/kg, Pb 100 mg/kg, Cd 3 mg/kg), but those for extractable contents are not exceeded the worrying level of soil pollution proposed by Ministry of Environment(Cu 50 mg/kg, Pb 100 mg/kg). When the threshold values were used as the criteria of soil pollution in the study area, $9{\sim}19%$ of investigated soil population was in polluted level. The spatial distributions of heavy metal contents greater than threshold values showed that polluted soils with heavy metals are restricted within the mountain soils in the vicinity of abandoned mines.

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  8. [국내논문]   흡착질의 증기압이 흡착에 미치는 영향   피인용횟수: 1

    김상원 (부산대학교 응용화학공학부 ) , 권준호 (부산대학교 응용화학공학부 ) , 강정화 (부산대학교 응용화학공학부 ) , 송승구 (부산대학교 응용화학공학부)
    한국환경과학회지 = Journal of the environmental sciences v.17 no.1 ,pp. 67 - 75 , 2008 , 1225-4517 ,

    초록

    Adsorption process is largely influenced by pore structures of adsorbents and physical properties of adsorbates and adsorbents. The previous studies of this laboratory was focused on the role of pore structures of adsorbents. And we found some pores of adsorbates which have larger pore diameters than the diameter of adsorbate are filled with easily. In this study the effects of physical and chemical properties of adsorbates and adsorbents, such as pore size distribution, vapor pressure on adsorption were investigated more thoroughly at the concentration of adsorbate of 1000 ppm. The adsorption in the pore ranges of $2{\sim}4$ times of adsorbates's diameter could be explained by space filling concept. But there was some condensation phenomena at larger pore ranges. The errors between the adsorbed amount of non-polar adsorbates and the calculated amounts by considering factors were found to be 44.46%, positively, and -142%, negatively. When vapor pressure is considered, the errors between the adsorbed amount of non-polar adsorbates and the calculated amounts were in the range of $1.69%{\sim}32.25%$ positively, and negatively $-1.08%{\sim}-63.10%$ .

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  9. [국내논문]   유비쿼터스 센서 네트워크 기반 국립공원 탐방객 통행량 계수시스템 개발  

    이주희 (대구대학교 관광학부 ) , 심규원 ((주)테크노비젼 코리아 ) , 배민기 (대구대학교)
    한국환경과학회지 = Journal of the environmental sciences v.17 no.1 ,pp. 77 - 83 , 2008 , 1225-4517 ,

    초록

    The purpose of this study was to develop the national park visitor counting system using the ubiquitous sensor network. This system is composed of a sensor node, sink node, gateways, CDMA module, server, and clients. The results of the study were: 1) stable data transmission distance was possible within 100 meters between sensor nodes, 2) the developed counting sensor system showed a network communication stability level of 88.3 percent in 1.2m wide trails. When installed in concentrate use areas or forks of national parks, the visitor counting system will not only contribute to provide reliable visitor counting, but also to improve the quality of national park visitor service, to manage park facilities and natural resources more efficiently, to achieve an information oriented national park system.

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  10. [국내논문]   해색영상을 이용한 동중국해 북부해역 하계 클로로필 a의 시공간 분포   피인용횟수: 3

    김상우 (국립수산과학원 해양연구팀 ) , 임진욱 (국립수산과학원 해양연구팀 ) , 장이현 (국립수산과학원 해양연구팀)
    한국환경과학회지 = Journal of the environmental sciences v.17 no.1 ,pp. 85 - 95 , 2008 , 1225-4517 ,

    초록

    Temporal and spatial variabilities of chlorophyll a (Chl-a) in the northern East China Sea (ECS) are described, using both 8-day composite images of the SeaWiFS (Sea-viewing Wide Field-of-view Sensor) and in-situ data investigated in August and September during 2000-2005. Ocean color imagery showed that Chl-a concentrations on the continental shelf within the 50 m depth in the ECS were above 10 times higher than those of the Kuroshio area throughout the year. Higher concentrations (above $5mg/m^3$ ) of yearly mean Chl-a were observed along the western part of the shelf near the coast of China. The standard deviation also showed the characteristics of the spatial variability near $122-124^{\circ}E$ , where the western region of the East China Sea was grater than that of the eastern region. Particularly the significant concentration of Chl-a, up to $9mg/m^3$ , was found at the western part of $125^{\circ}E$ in the in-situ data of 2002. The higher Chl-a concentrations of in-situ data were consistent with low salinity waters of below 30 psu. It means that there were the close relationship between the horizontal distribution of Chl-a and low salinity water.

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