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기류패턴에 따른 광주지역 PM 10 농도 특성 및 영향 배출원 추정 연구
송형명,이대행,이경석,안상수,이세행,양윤철,김선정,전홍대,서광엽,도우곤,조영관 한국환경분석학회 2017 환경분석과 독성보건 Vol.20 No.4
The average concentrations of PM10 in Gwangju decreased from 50 μg/m3 in 2008 to 45 μg/m3 in 2010, 41 μg/m3 in 2012 and 2014, and 40 μg/m3 in 2016. PM10 concentrations at Oseon-dong and Geonkun-dong were higher than those at other measurement sites. The backward trajectories for the sampling periods (2008-2016) were classified into three groups: (1) air masses related to long-range transport from China to Gwangju via the Yellow Sea (off the west coast of Korea) (clusters 1 and 2), (2) air masses related to local emissions From the Korean peninsula (clusters 3 and 4), and (3) air masses from the south (Cluster 5), The average concentrations of PM10 were 41.0, 48.1, 37.6, 43.3, and 33.3 for cluster 1,2,3,4, and 5, respectively. Cluster 2 had the highest PM10 concentration while cluster 5 had the lowest. Air masses fiom Cluster 1 and 2 were 29% and 13%, more frequent, respectively, during the entire period; the higher PM10 concentrations in these cases were influenced mainly by Beijing, Hebei, Shandong, Jiangsu, and Shanghai in China. This means that long-range transport aerosols contribute significantly to the PM10 concentration in Gwangju. Cluster 4, which was affected by many sources on the west coast area of Korea, also showed a high PM10 concentration; the slow floe of the air mass contributed to this. Therefore, the high concentration of PM10 in Gwangju area is influenced comprehensively by long-range transport, local emissions and the condition of the flow of the air mass.
기류패턴에 따른 광주지역 PM<sub>10</sub> 농도 특성 및 영향 배출원 추정 연구
송형명 ( Hyeong-myeong Song ),이대행 ( Dae-haeng Lee ),이경석 ( Kyoung-seok Lee ),안상수 ( Sang-su An ),이세행 ( Sae-haeng Lee ),양윤철 ( Yoon-cheol Yang ),김선정 ( Sun-jung Kim ),전홍대 ( Hong-daen Juen ),서광엽 ( Gwang-yeob S 한국환경분석학회 2017 환경분석과 독성보건 Vol.20 No.4
The average concentrations of PM<sub>10</sub> in Gwangju decreased from 50 μg/㎥ in 2008 to 45 μg/㎥ in 2010, 41 μg/ ㎥ in 2012 and 2014, and 40 μg/㎥ in 2016. PM<sub>10</sub> concentrations at Oseon-dong and Geonkun-dong were higher than those at other measurement sites. The backward trajectories for the sampling periods (2008-2016) were classified into three groups: (1) air masses related to long-range transport from China to Gwangju via the Yellow Sea (off the west coast of Korea) (clusters 1 and 2), (2) air masses related to local emissions From the Korean peninsula (clusters 3 and 4), and (3) air masses from the south (Cluster 5), The average concentrations of PM<sub>10</sub> were 41.0, 48.1, 37.6, 43.3, and 33.3 for cluster 1,2,3,4, and 5, respectively. Cluster 2 had the highest PM<sub>10</sub> concentration while cluster 5 had the lowest. Air masses fiom Cluster 1 and 2 were 29% and 13%, more frequent, respectively, during the entire period; the higher PM<sub>10</sub> concentrations in these cases were influenced mainly by Beijing, Hebei, Shandong, Jiangsu, and Shanghai in China. This means that long-range transport aerosols contribute significantly to the PM<sub>10</sub> concentration in Gwangju. Cluster 4, which was affected by many sources on the west coast area of Korea, also showed a high PM<sub>10</sub> concentration; the slow floe of the air mass contributed to this. Therefore, the high concentration of PM<sub>10</sub> in Gwangju area is influenced comprehensively by long-range transport, local emissions and the condition of the flow of the air mass.
광주지역내 바닥분수 재이용수에서 분리한 장구균의 항생제 내성 연구
김연희,송형명,최영섭,이윤국,박진환,김선정,김하람,강유미,배석진,조영관 한국환경보건학회 2019 한국환경보건학회지 Vol.45 No.3
Objectives: This study aims to evaluate water quality in terms of microorganisms and identify the antibiotic resistance of Enterococci isolated from the recycling water in floor fountains at three parks and one reservoir in the Gwangju area. Methods: Water samples were analyzed for Enterococci using membrane Enterococcus indoxyl β d glucoside agar (mEI) as described in USEPA Method 1600. The vancomycin-resistant Enterococci with VanA and VanB were identified by PCR. An examination of the antibiotic resistance of isolates against 14 antibiotics was performed by the disk diffusion method. Results: The drinking water quality criterion was exceeded for total colony counts in 68% of all recycling water samples. The average concentration of total califorms and fecal coliforms was 139,325 and 413 CFU/100 mL, respectively. VanA and VanB were not detected from the isolates. We found the antibiotic resistant Enterococci strains to be E. faecalis, E. faecium, E. durans, E. mundtii, E. hirae, and E. thailandicus. The isolates were resistant to Rifampin (50%), Erythromycin (25.8%), Tetracycline (10.2%), Nitrofurantoin (8.1%), Minocycline (3.1%), Erythromycin (1.2%), Penicillin (0.7%), Norfloxacin (0.5%), and Teicoplanin (0.5%) among the 14 antibiotics tested. Antibiotic resistance tests for Enterococci from the recycling water of floor fountains resulted in 30.2% showing resistance to two or more antibiotics. Conclusions: These results showed that the multi-antibiotic resistance of Enterococci, E. coli, and others should be investigated continuously in each environment field.