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논문 : 수질제어를 통한 관 내부 부식방지 기술의 정수처리공정 적용방안
서대근 ( Dae Keun Seo ),왕창근 ( Chang Keun Wang ) 대한상하수도학회 2006 상하수도학회지 Vol.20 No.4
Although final water of domestic water treatment plants almost contains highly corrosive characteristics, the countermeasures for eliminating internal corrosion of pipeline system have not been conducted yet by controlling water quality in plants. The technologies of internal corrosion control are to control water quality parameters(pH, Alkalinity, and Calcium Hardness etc.) and to use corrosion inhibitor. Under the conditions of domestic water treatment, first of all, the technologies of adjusting water quality parameters has to be considered. Otherwise, The technology of using corrosion inhibitor is favorably thought to be applied with the technology of adjusting water quality parameters in accordance with the result of availability for water treatment process. Since the technology of adjusting water quality parameter influences on other water treatment processes, the guideline of water quality management to be apt for water quality characteristic is required to be estabilished. While the selection of proper chemicals and technologies is dependent upon the raw water characteristics and water treatment process, typically, the technology of Ca(OH)2 & CO2 additions is considered more effective than other technologies in order to adjust pH and Alkalinity, increase Ca(2+) and form CaCO3 film
김민정,이규철,김건우,이현지,김민영,서대근,이정엽,조영철,Kim, Min-jeong,Lee, Gyu-Cheol,Kim, Kunwoo,Lee, Hyunji,Kim, Min Young,Seo, Dae Keun,Lee, Jeong Yeob,Cho, Young-Cheol The Microbiological Society of Korea 2018 미생물학회지 Vol.54 No.2
가시아메바(Acanthamoeba spp.)와 파울러자유아메바(Naegleria fowleri)는 자유생활아메바로 자연계에 널리 분포하며 사람과 동물에게 치명적인 질병을 일으킨다. 본 연구에서는 가사아메바와 파울러자유아메바를 물 환경에서 조사하기 위해 기존에 보고된 네 종류의 분자생물학적 방법과 상용 real-time PCR 키트의 분석 민감도를 비교하였다. 그 결과 duplex real-time PCR 방법이 민감도가 가장 좋았으며, 동시에 두 종류의 자유생활아메바를 검출할 수 있었다. 따라서 이 방법을 사용하여 한국의 대전시에 위치한 3개 하천, 6개 지점을 대상으로 그 분포를 2회 조사하였다. 가시아메바는 12개 시료 중 10개 시료에서 검출되었으며(83.3%), 파울러자유아메바는 2개 시료에서 검출되었다(16.6%). 향후 이러한 유해 아메바로부터 먹는 물의 안전성을 확보하기 위해 지속적인 분포조사가 필요할 것이다. Naegleria fowleri and Acanthamoeba spp. are free-living amoebas that are widely distributed in natural environments. Although uncommon, infection with these protozoans can cause fatal disease in humans and animals. In this study, in order to select the appropriate method to survey Naegleria fowleri and Acanthamoeba spp. in water samples, four molecular biology techniques and one commercially available kit for real-time PCR were compared. The results indicated that the duplex real-time PCR was the most sensitive, and could be used to simultaneously detect two different free-living amoebas. Using the duplex real-time PCR approach, the two free-living amoebas were surveyed in three local streams in Daejeon, Republic of Korea. The concentrated free-living amoebas were inoculated onto non-nutrient agar plates which had been spread with heat-inactivated Escherichia coli and incubated for 5~7 days. After incubation, gDNA was extracted and used as the template for amplification by duplex real-time PCR. Acanthamoeba spp. and N. fowleri was detected from ten (83.3%) and two (16.6%) of the twelve samples, respectively. As these two free-living amoebas can be fatal, continuous surveillance is needed to track their distribution in the aquatic environment for the drinking water safety.
김민정,이규철,김건우,이현지,김민영,서대근,이정엽,조영철,Kim, Min-jeong,Lee, Gyu-Cheol,Kim, Kunwoo,Lee, Hyunji,Kim, Min Young,Seo, Dae Keun,Lee, Jeong Yeob,Cho, Young-Cheol The Microbiological Society of Korea 2018 미생물학회지 Vol.54 No.3
자유생활아메바인 가시아메바(Acanthamoeba spp.)와 파울러자유아메바(Naegleria fowleri)는 아메바성 뇌염 등 치명적인 질병을 일으키며, 물을 포함한 자연 환경에 널리 분포한다. 가시아메바와 파울러자유아메바가 한국의 주요 상수원수에 존재하는지 알아보기 위해 배양법에 기초한 실시간 중합효소연쇄반응법을 이용하여 2017년 7월부터 12월 사이에 한국의 52개 주요 상수원수를 조사하였다. 가시아메바와 파울러자유아메바가 각각 42개 시료(80.8%)와 6개 시료(11.5%)에서 검출되었다. 가시아메바의 경우 계절과 상관없이 고른 검출율을 보였으나, 파울러자유아메바는 주로 여름과 가을에 검출되었으며 겨울에는 검출되지 않았다. 이상의 결과는 이러한 자유생활아메바가 한국의 상수 원수에도 고루 존재한다는 것을 의미한다. The pathogenic free-living amoebas (FLAs), Acanthamoeba spp. and Naegleria fowleri, can cause fatal infections, including amoebic encephalitis. They are ubiquitously distributed in nature, including in diverse bodies of water. In order to survey Acanthamoeba spp. and N. fowleri in source water in Korea, we used culture-based real-time PCR to detect viable FLAs in 52 source water samples collected between July 2017 and December 2017. Acanthamoeba spp. and N. fowleri were detected in 42 samples (80.8%) and 6 samples (11.5%), respectively. Acanthamoeba spp. were detected at approximately the same frequency in all seasons, but N. fowleri was mainly detected in summer and autumn, with no N. fowleri detected in winter. These results demonstrate that these pathogenic FLAs, especially N. fowleri, which has caused deaths in the United States and China, are widely distributed in the Korean aquatic environment.