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최성득,백송이,장윤석,윤영준,박병권,홍성민 한국해양과학기술원 2007 Ocean and Polar Research Vol.29 No.4
Atmospheric levels of polychlorinated biphenyls (PCBs) at the King Sejong station were monitored for one year using passive air samplers. Low-chlorinated PCB homologues were predominant in all samples. PCB levels were observed to decrease with distance from the station, which may indicate that a significant part of PCBs could be of local origin. Although the level of PCBs at the King Sejong station is very low (S9PCB (18, 52, 101, 118, 128, 138, 153, 180, 187): 2.3 pg m-3) probably due to decrease in the global PCB emissions, it is one order of magnitude higher than a background level in the Antarctic. Based on this preliminary study, more interpretation on PCB data and meteorological conditions is required.
최성득 한국환경분석학회 2022 환경분석과 독성보건 Vol.25 No.3
To manage particulate matter (PM2.5) in Ulsan, this study evaluated the current status of the emissions and concentrations of PM2.5 and the number and spatial distribution of urban air quality monitoring stations (AQMSs). The major emission sources of PM2.5 in Ulsan are industrial activities (production process, manufacturing combustion, and ships), and the annual mean concentration of PM2.5 in Ulsan is not higher than those in other large megacities. However, the toxicity of PM2.5 in Ulsan seems to be high owing to the presence of hazardous air pollutants. Although the AQMSs in Ulsan have been well operated, and the number of stations is sufficient, further evaluation of the roles and spatial distribution of some of these stations is required. This study proposed the priority areas for installing new AQMSs using Geographic Information System (GIS) tools based on the population distribution and PM2.5 pollution levels. The method developed in this study can be used for other cities, as well as for expanding urban areas and new downtown areas in Ulsan to assess the existing monitoring network and suggest the optimum locations of new stations.
Accumulation Features of Arsenic Species in Various Fishes Collected from Coastal Cities in Korea
최성득,손희식,최민규,박민규 한국해양과학기술원 2015 Ocean science journal Vol.50 No.4
In this study, 36 fish species were collected from three coastal cities in Korea to investigate levels and patterns of six arsenicals (arsenite: As (III), arsenate: As (V), arsenocholine: AsC, arsenobetaine: AsB, monomethylarsonic acid: MMA, and dimethylarsinic acid: DMA). The levels of Σ6 As in the different fish species varied substantially, ranging from 0.02 μg As/g ww (Islaeli carp) to 9.65 μg As/g ww (Skate ray) with a median of 0.40 μg As/g ww. All the arsenicals in marine fishes showed higher levels than those in freshwater fishes due to fish feed living in saline water. Overall, marine carnivorous fishes seem to be more contaminated with arsenic. For all the fish samples, AsB (mean fraction: 90.6%) was dominant among the six arsenicals, indicating biomethylation of inorganic arsenic and accumulation of AsB. Fish species with high water contents showed elevated levels of As (III), but there was no further significant correlations between arsenicals and water/lipid contents. Concentrations of As (V) were significantly lower than those of As (III), which implies that As (V) is reduced during biomethylation of inorganic arsenic. Consequently, we hypothesize that the toxicity of arsenic (mainly derived from As (III)) can be increased by the reduction of As (V), especially for the fish species with higher water contents.