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이윤국,이주리,정선용,박정훈,Lee, Youn-Goog,Lee, Ju-Ry,Chung, Seon-Yong,Park, Jeong-Hun 한국지하수토양환경학회 2008 지하수토양환경 Vol.13 No.2
오염물질이 토양에 흡착 또는 탈착하는 성질은 지하계에서 오염물질의 이동과 거동에 큰영향을 미친다. 아트라진을 대상으로 광주지역 7가지 토양을 이용하여 흡착 및 탈착특성을 조사하였다. 토양의 유기탄소함량 (organic carbon content)은 $0.42{\sim}2.82%$의 범위였으며, 아트라진의 토양분배계수 ($K_d$)는 $0.48{\sim}3.26\;l/kg$의 범위였다. 경방 토양과 용동토양을 제외한 나머지 토양들은 유기탄소함량이 증가함에 따라 $K_d$ 값은 증가하였다. Three site desortpion model을 이용하여 평형 탈착분율, 비평형 탈착분율, 비탈착 분율 그리고 탈착속도계수를 구하였다. 실험한 모든 토양에서 아트라진의 비탈착 분율이 산출되었고, 다단탈착 실험에서도 탈착되지 않는 아트라진이 토양에 존재하였다. 다단 탈착 실험에서 흡착 등온선과 탈착 등온선이 일치하지 않는 이력현상이 나타났다. Sorption and desorption processes play an important role in the transport and fate of organic contaminants in subsurface system. In this study, sorption and desorption characteristics of atrazine in 7 soils selected at the Gwangju area were investigated. Soil organic carbon contents ranged from 0.42 to 2.82%. Sorption and desorption experiments were performed in batch slurries. Sorption distribution coefficient ($K_d$) of atrazine were ranged from 0.48 to 3.26 l/kg and $K_d$ value increased with increasing organic carbon contents except of Kyongbang and Youngdong soils. Single desorption data were analyzed by the three-site desorption model including equilibrium, non-equilibrium and non-desorbable site. Non-desorbable site fractions of atrazine in all soils were enumerated and non-desorbable atrazine was observed in seriesdilution desorption experiment. Sorption/desorption hysteresis was also observed in the series-dilution desorption experiment.
이윤국 ( Youn Goog Lee ),윤상훈 ( Sang Hoon Yoon ),조광운 ( Gwang Woon Jo ),위환 ( Whan Wi ),김난희 ( Nan Hee Kim ),강영주 ( Yeong Ju Kang ),김은선 ( Eun Sun Kim ),서광엽 ( Gwang Yeob Seo ) 한국환경분석학회 2013 환경분석과 독성보건 Vol.16 No.2
This study was performed to investigate the water quality of non-designated spring in Gwangju. Samples were collected at 9 sites from April 2012 to March 2013. The average concentrations of physicochemical items at each sites satisfied with drinking water guideline except microorganisms. The concentrations of main minerals including Ca2+, Mg2+, K+ and Na+ showed generally similar and higher than those of bottled minerals water in some sites. Total coliforms and fecal coliforms were detected in some sample collected except S1 and S4 site. The microorganisms isolated in the natural mineral water found out E. coli (62%), Raoultella planticola (10%), Citrobacter freundii (9%) and so on. Detection of these microorganisms showed that the environment around the spring had been exposed to fecal contamination. For the efficient control, the government office needs to designate the S1 and S4 site found out the acceptance for drinking water standard as the management spring water.
이윤국 ( Youn Goog Lee ),박옥현 ( Ok Hyun Park ),안상수 ( Sang Su An ),김연희 ( Yun Hee Kim ),김종민 ( Jong Min Kim ),배석진 ( Seak Jin Bae ),백계진 ( Kye Jin Paik ),문용운 ( Young Woon Moon ) 한국환경분석학회 2011 환경분석과 독성보건 Vol.14 No.3
This study was performed to investigate the quality of spring water during the rainy periods in Mudeung mountain, in April, May, July and August 2010. The variation of physicochemical items such as pH, TDS, NO3-N, Cl-, SO4(2-) was not signigicant and the concentration at each sites satisfied with drinking water guideline except that of turbidity. The content variation of minerals like Ca2+, Mg2+, K+, Na+ showed generally stable during the rainy periods. Even though a photo catalyte sterilizer was used, total coliforms and fecal coliforms were detected in every sample collected, except for the one from Neutjae. That is why the sterilizing facility is exposed to many environmental variables such as insolation and rainfall. According to the distribution of species, at Jungmeorijae, total coliforms proliferate because of fecal contamination. However, at Neutjae, total coliforms were caused by plant, soil and water, rather than fecal.
이윤국(Youn-Goog Lee),김난희(Nan-Hee Kim),최영섭(Young-Seop Choi),김선정(Sun-Jung Kim),박주현(Ju-Hyun Park),강유미(Yu-Mi Kang),배석진(Seok-Jin Bae),서계원(Kye-Won Seo),김종민(Jong-Min Kim) 한국환경보건학회 2020 한국환경보건학회지 Vol.46 No.2
Objective: This study is designed to measure the concentration of DBPs (disinfection by-products) in pool water and in air and to estimate the carcinogenic potential through the evaluation of inhalation exposure. Methods: The subjects were six indoor swimming pools with many users in Gwangju. Samples of pool water and indoor air were taken every one month from August 2018 to August 2019 and analyzed for eight swimming pool standards. Three-liter air samples were collected and the VOCs were analyzed using GC/MS directly connected to thermal desorption. Results: pH was 6.8-7.5 and the concentration of free residual chlorine in pool water was 0.40-0.96 ?/ℓ. Physicochemical test items such as KMnO₄ consumption and heavy metal items such as Aluminum met existing pool hygiene standards. No VOC materials were detected except for the DBPs. The concentration of THMs in the pool water was 11.05-41.77 µg/L and the THMs mainly consist of Chloroform (63-97%) and BDCM (3- 31%). The concentration of indoor air THMs is 13.24-32.48 µg/m3 and consists of Chloroform. The results of carcinogenic assessment of chloroform in the indoor swimming pool via inhalation exposure were 2.0 to 6.4 times higher than the ‘acceptable risk level’ suggested by the US EPA. Conclusions: The concentration of THMs in the pool water is 11.05-41.77 µg/L, most of which is chloroform. In addition, the concentration of indoor air THMs is 13.24-32.48 µg/㎥ . The result of carcinogenic assessment of chloroform was 2.0 to 6.4 times higher than the ‘acceptable risk level’ suggested by the US EPA.
광주지역 폐수배출사업장의 수질오염 미규제물질 실태조사 - 음이온류와 알킬페놀류를 대상으로 -
이우진 ( Woo-jin Lee ),서동주 ( Dong-ju Seo ),정연재 ( Yeon-jae Jeong ),박미애 ( Mi-ae Park ),박주현 ( Ju-hyun Park ),전홍대 ( Hong-dae Jeon ),이윤국 ( Youn-goog Lee ),서광엽 ( Gwang-yeob Seo ),정정조 ( Cheong-jo Cheong ),김난희 ( 한국환경기술학회 2023 한국환경기술학회지 Vol.24 No.1
In this study, anions (Chloride ion, Sulfuric acid ions) and alkylphenols (Nonylphenol and Octylphenol) were analyzed for wastewater discharge facilities to investigate the emission industry of unregulated water pollutants. Chloride ion showed high concentrations in the “Textile and leather processing”, “plating” facilities and the concentration range was 5.9~1,178.1 mg/L. Sulfate ion were detected at high concentrations in “Battery and semiconductor”, “petrochemical” industry and the concentration range was 2.6~7,761.0 mg/L. Nonylphenol was detected at a high concentration in the “Repair and car wash” facility and the concentration range of nonylphenol was 0.210~114.871 ug/L. Octylphenol was detected in high concentrations in the industries of “Repair and car wash”, “steel and metal processing”, “plating” facility and the concentration range of octylphenol was 0.193~170.113 ug/L.
김난희 ( Nan Hee Kim ),위환 ( Whan Wi ),조광운 ( Gwang Woon Jo ),이윤국 ( Youn Goog Lee ),윤상훈 ( Sang Hoon Yoon ),강영주 ( Yeong Ju Kang ),김은선 ( Eun Sun Kim ),서광엽 ( Gwang Yeob Seo ) 한국환경분석학회 2013 환경분석과 독성보건 Vol.16 No.2
The analysis of raw water and purified water from 105 social welfare organizations in Gwangju was performed to find out the purification effect of water purifiers in use. In the study, 105 purified water samples and corresponding raw water samples (95 from tap water, 10 from groundwater) were analyzed. Forty six inspection items of drinking water standard and main minerals (Ca2+, Mg2+, K+, Na+) were analyzed for groundwater and 28 items such as heavy metals, microorganisms, disinfection by-products, aesthetic materials were analyzed for tap water. When the concentration of each item in purified water showed lower than that of raw water, we expressed the results as the positive(+) effect and vice verse, negative(-) effect. The results of the purification effect of water purifier using tap water and groundwater were presented (+) effect 39.6% and (-) effect 28.0%, (+) effect 39.1% and (-) effect 30.1%, respectively.
박옥현 ( Ok Hyun Park ),김종민 ( Jong Min Kim ),김연희 ( Yun Hee Kim ),안상수 ( Sang Su An ),이윤국 ( Youn Goog Lee ),배석진 ( Seok Jin Bae ),강영주 ( Yeong Ju Kang ),백계진 ( Kye Jin Paik ) 한국환경분석학회 2012 환경분석과 독성보건 Vol.15 No.2
This study was performed to investigate the quality for microorganisms of water purifiers set up public places used lots of people which in public office, welfare facilities, public bath, school. The water purifiers were installed near the entrance and where they are easily found. None of them were installed at where they should not be installed at the locations stated by law. Heterotrophic plate count at public office, welfare facilities, public bath, school was 0~3,700 CFU/mL, 0~3,400 CFU/mL, 0~3,500 CFU/mL, 0~2,300 CFU/mL respectively. Total coliforms was not detected at public office and school, but found at welfare facilities and public bath. Fecal coliforms was not detected anywhere. The rates bellowing the drinking water quality at public office, welfare facilities, pubic bath, school are 36%, 28.7%, 22.9%, 9.5% respectively. Species of heterotrophic bacteria isolated from public office water purifiers was Micrococcus Luteus, Sphingomonas paucimobilis, Ralstonia mannitolilvtica, Pseudomonas fluorescens etc. Most of bacteria found during the testing are common bacteria that exist in typical living environment.
안상수 ( Sang Su An ),강영주 ( Yeong Ju Kang ),위환 ( Hwan Wi ),김종민 ( Jong Min Kim ),이윤국 ( Youn Goog Lee ),박옥현 ( Ok Hyun Park ),박종태 ( Jong Tea Park ),백계진 ( Ke Jin Paik ) 한국환경분석학회 2009 환경분석과 독성보건 Vol.12 No.3
Samples of ground water using as potable resources were collected in the five districts of Gwangju city.. Anionic and cationic substances in ground water were monitored to review the compliance as a drinking water source. Average distribution of anionic ingredients in the ground water by district was Donggu>Bukgu>Namgu>Seogu>Gwangsangu. Average distribution of inorganic substances on the ground water by district was Seogu>Donggu>Bukgu>Namgu>Gwangsangu. The highest contents of anionic substance were detected in Donggu and the lowest in Gwangsangu. The contents of anionic matter by district was Cl->SO4(2-)>NO3-N>F-. The highest contents of minerals were in Donggu. The result of contents of cationics by area was Na>Ca>Mg>K. There was close correlation among the minerals (Na, Ca, Mg, K). In case of Na, Ca, Mg and K, the results of this study were satisfied with the water standards of UK and twice higher than the drinking water sold in Gwangju.