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정효준,황대호,방승석,박수연,이홍근,Jeong Hyo-June,Hwang Dae-Ho,Bang Seung-Seok,Park Sue-Yeon,Lee Hong-Keun 한국환경보건학회 2002 한국환경보건학회지 Vol.28 No.1
This study was carried out to provide environmental information using geographic information system for the environmental manager engaged in governmental office. Point and nonpoint sources were classified by each small watershed and an administrative district. ArcView and ERDAS software were used to develop environmental information system. Small watershed was extracted into the DTEM using HEC-geoHMS which is ArcView extension. Study area was divided into 7 small watershed. Point sources were constituted as cattle, milk cattle, swine, and poultry. Land use was divided into forests, rice paddies, residential sites et al. User interface was designed to search information easily for the nonprofessional GIS users.
물중의 잔류농약 분석을 위한 SPME의 최적조건 선정에 관한 연구
장미라 ( Mi Ra Jang ),정효준 ( Hyo June Jeong ),이홍근 ( Hong Keun Lee ) 한국물환경학회 2002 한국물환경학회지 Vol.18 No.4
This study was conducted to develope a simple, rapid and solvent-free solid-phase microextraction(SPME) procedure for extracting three organochlorine, one triazine and nine organophosphorus pesticides from water. The optimal conditions of SPME for analyses of organochlorine pesticides were obtained at 250℃ of desorption temperature, 45 minutes of equilibrium time, pH 6 and NaCl 0% addition using 100㎛ polydimethylsiloxane fiber and those of triazine and organophosphorus pesticides were obtained at 270℃ of desorption temperature, 60 minutes of equilibrium time, pH 6 and NaCl 0% addition using 100㎛ polydimethylsiloxane fiber. This method showed good lineality for organochlorine pesticides between 0.0001 and 10㎍/L with regression coefficients ranging 0.9986∼0.9992 and for triazine and organophosphorus pesticides between 0.01 and 100㎍/L with regression coefficients ranging 0.9867∼0.9998.
지리정보시스템(GIS)을 이용한 소규모 수처리시설의 최적부지 선정 -보령,홍성지구를 중심으로-
방승석 ( Seung Souk Bang ),정효준 ( Hyo June Jeong ),이홍근 ( Hong Keun Lee ) 한국물환경학회 2002 한국물환경학회지 Vol.18 No.6
This study was carried out to select optimal sites of waste water treatment plant in a small watershed area as Boryeong-Hongseong located at south Chungcheong province. For the extraction of watershed from the study area, ArcView GIS 3.2 was used with HEC-GeoHMS 1.1 extension. Futhermore, Image Analyst, GeoMedia, and MicroStation were used for the data conversion. In order to compute selection factors, simple addictive weighting method and factor combination technique were used, Four possible sites were selected after considering geologic, hydrological, and pollutant loading etc, ChongsoMyeon was the most appropriate site among four possible sites. It had low elevation, low population density, and good accessibility. We confirm that GIS would be a good tool to analyze spatial data and to select optimal conditions for decision-making sites such as wastewater treatment plant in a small watershed area.
반응표면 분석을 이용한 Salmonella enteritidis의 증식 효능 평가
홍정미,정효준,이홍근 한국환경과학회 2002 한국환경과학회지 Vol.11 No.12
This stidy was performed to investigate the single and combined effect of concentrations of garlic juice according to the pH and temperature on the growth of Salmonella enteritdis in brain heart infusion broth, and to develope Response surface model for the effect of concentrations of garlic extract. The results of electric conductibility of Salmonella enteritidis growing in the range of incubation temperature (25~42℃), PH(5.5~9.0) and concentration of garlic juice(0~0.8%) showed that a badge with high low D.T.value and concentration of garlic extract were significantly with D.T.value and concentration of garlic extract were significantly correlated with D.T.value (p<0.01). Growth of Salmonella enteritidis in the condition of 37℃ and pH7.0 presented the lowest D.T.value.