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유기염소계 잔류농약이 제주도 연안 해양환경에 미치는 영향
오윤근,김정호 ( Youn Keun Oh,Jung Ho Kim ) 한국물환경학회 1997 한국물환경학회지 Vol.13 No.3
To obtain the effects of residual organochlorine pesticides in the coastal environment on the Cheju Island, the ocean environment of Cheju city and Wimi was surveyed in May, August and October 1996. The qualification defection concentration of captan, chlorothalonil and dicofol of organochlorine pesticides in the water were 0.009ng/㎖, 0.005ng/㎖ and 0.023ng/㎖ by GC-ECD, respectively. The qualification defection concentration of captan, chlorothalonil and dicofol of organochlorine pesticides in the plant and animal were 0.018ng/g, 0.010ng/g and 0.046ng/g by GC-ECD, respectively. Captan, chlorothalonil and dicofol of organochlorine pesticides used in the farm were not detected in any water, sediment, seaweed cava(Ecklonia Cava), Agar(Gelidium amansii), turban sell(Batillus cornutus) and sea urchin(Anthocidaris Crassispina). The coastal environment in the cheju island was not effected the captan, chlorothalonil and dicofol of organochlorine pesticides used in the farm on cheju island
$\delta$$^{15}$ N값을 이용한 제주도 지하수중의 질산성질소 오염원추정에 관한 연구
오윤근,현익현 한국지하수토양환경학회 1997 지하수환경 Vol.4 No.1
제주도 지하수중의 $\delta$$^{15}$ N값을 이용하여 질산성질소의 오염원을 추정하기 위해 질산성질소농도가 먹는물 최대허용농도를 초과하거나 초과할 우려가 있는 지역중 7개 지점을 선정했으며, 대조지역으로 질산성 질소가 1 mg/ι 미만인 1개 지역을 선정하였다 질산성질소의 오염원은 $\delta$$^{15}$ N와의 관계를 비교하여 자연토양, 화학비료, 가정하수, 축산폐기물이나 퇴비등에서 유래되는 것으로 구분하였다. 질산성 질소농도와 $\delta$$^{15}$ N에 의한 주요 기원별 구성비에서는 A-1, R 및 F-1이 각각 61.1%, 50.0% 및 20.0%가 축산분뇨.생활하수 로 27,8%, 45.7% 및 40.0%가 화학비료로 11.1%, 4.3% 및 40.0%가 자연토양으로 구별되였고, A-2에서 A-6은 각각 37.8%, 25.0%, 40.9%, 26.2% 및 35.7%가 축산분뇨.생활하수로 2.6%, 3.3%, 6.1%, 2.3% 및 4.1%가 자연 토양으로 59.6%, 71.7%, 53.0%, 71.5% 및 60.2%가 화학비료로 추정되었다. This study was carried out to find out the source of nitrate-nitrogen (NO$_3$-N) contamination in the groundwater in Cheju Island. Among the sites which have exceeded or may exceed the criterion level (10 mg/L) of NO$_3$-N in drinking water, seven sampling sites including two reference sites were chosen. The former regions are mainly agricultural ones (A-1 to A-6) and residential (R). The latter regions are forest (F-1 and F-2). The predicted major source and its contribution to NO$_3$-N concentration at each site, using $\delta$$\^$15/N and NO$_3$-N concentration, were as follow; Those at A-1, R and F-1 was 61.1%, 50.0% and 20.0% to manure or domestic sewage, 27.8%, 45.7% and 40.0% to chemical fertilizers and 11.1%, 4.3% and 40.0% to natural soil, respectively. Those at A-2 to A-6 were 37.8%, 25.0%, 40.9%, 26.2% and 35.7% to manure or domestic sewage, 59.6%, 71.7%, 53.0%, 71.5% and 60.2% to chemical fertilizers and 2.6%, 3.3%, 6.1%, 2.3% and 4.1% to natural soil, respectively.
오윤근 제주대학교 해양연구소 2000 해양과환경연구소 연구논문집 Vol.24 No.-
The salinization of groundwater is widely known as one type of water contamination in all over the coastal area. To investigate this salinization of groundwater, the various approaches are needed because its characteristics is widely changed from area to area and from time to time, depending on the aquifer conditions. The purpose of this study is to investigate the physical and chemical characteristics of salinization of groundwater at the east area of Jeju island. For this purpose, the major ions of groundwater, are analyzed according to the well depth and tidal levels. The results obtained from this study are summarized as follows : At D -28 well, the deeper the well depth, the greater the degree of water quality fluctuation with tidal levels. However. this phenomenon is appeared inversely at D-124 well. This difference is due to the existence of the specific permeation structure such as cracks and joints at the same level with mean sea level at their location. It is found that time la9 between tidal level and the fluctuation of water quality is 2∼2.5 hours at D-28 well. and 3∼3.5 hours at D-124 well. As the depth of well is deeper. the concentrations of major ions are increased, excepting the case of NO3- originated from the land sources.
오윤근 제주대학교 해양연구소 2000 해양자원연구소연구보고 Vol.24 No.-
The salinization of groundwater is widely known as one type of water contamination in all over the coastal area. To investigate this salinization of groundwater, the various approaches are needed because its characteristics is widely changed from area to area and from time to time. depending on the aquifer conditions. The purpose of this study is to investigate the physical and chemical Characteristics of salinization of groundwater at the east area of Jeju island. For this purpose. the major ions of groundwater. are analyzed according to the well depth and tidal levels. The results obtained from this study are summarized as follows: At D-28 well. the deeper the well depth, the greater the degree of water quality fluctuation with tidal levels. However. this phenomenon is appeared inversely at D-124 well. This difference is due to the existence of the specific permeation structure such as cracks and joints at the same level with mean sea level at their location. It is found that time lag between tidal level and the fluctuation of water quality is 2-2.5 hours at D-28 well. and 3-3.5 hours a t D-124 well. As the depth of well is deeper. the concentrations of major ions are increased. excepting the case of NO_(3)^(-) originated from the land sources.
제주도 동부해안에서의 지하해수에 대한 화학적 특성에 관한 연구
오윤근,박관석 제주대학교 환경연구소 1994 환경연구논문집 : 제주대 Vol.2 No.1
Hydrographic conditions (temperature, salinity, precipitation) and geochemical characteristics of ground-seawater have been studied in the easterncoast areas (Kimnyoung) of Cheju Island during July to September 1994. The results are summarized as follows. 1) The water temperature of the ground-seawater was approximately 17 ±1℃ and remained constant. 2) standard-seawater contained 38.69% of Na^(+), and 8.82% of M^(++), while ground-seawater contained 39.33%, of Na^(+) and 7.78% of M^(++). 3) The chemical characteristics of ground-seawater seemed to be determined by the component rates of Na^(+) and Mg^(++), therefore these two elements are considered to be important for determining the chemical composition. of ground-seawater.