http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
정동환 ( Dong Hwan Jeong ),조양석 ( Yang Seok Cho ),최인철 ( Inc Heol Choi ),안경희 ( Kyung Hee Ahn ),정현미 ( Hyen Mi Chung ),권오상 ( Oh Sang Kwon ) 한국환경영향평가학회 2014 환경영향평가 Vol.23 No.5
2011년말 저·갈수기 북한강수계에서 수돗물 이취미 발생의 한 원인으로 의암호에서 조류 발생에 영양염류의 과다와 기상요인에 의한 것으로 보고 있으며, 특히 춘천지역의 생활하수에서 기인하는 영양염류를 중심으로 춘천시 공공하수처리시설의 방류수에서 배출하는 영양염류의 기여율 및 의암호 조류발생과의 관계를 살펴보고 그 영향을 분석하고자 하였다. 의암호 수체 내 영양염류가 부영양화 수준으로 이미 존재하고 있고, 겨울철임에도 체류시간, 수온 등 환경요인은 조류 성장에 적합한 여건을 갖추고 있다. 의암호 수계에서 인처리시설 도입으로 하수처리장의총인 부하량은 약 43% 저감하였고, 의암호 조류 농도(Chlorophyll-a)는 약 7% 정도 개선되었다. 반면, 인처리시설 도입에 따른 하수처리장의 질소 처리효율에는 거의 변화가 없는 것으로 나타났다. 이러한 문제를 좀더 효율적으로 해결하기 위해서는 의암호 상류지역에 대한 유역관리 대책을 수립하는것이 필요하며, 춘천지역 하수처리장의 질소 처리를 위한 운영·관리 개선 방안을 마련하는 것이 필요하다고 판단되었다. When abnormal taste and odor were detected in the tap water of the North-Han river watershed during the dry season in late 2011, excessive nutrients with algal growth in the Lake Uiam and weather factors were considered to be among its causes. The nutrients, in particular, originated from domestic sewage in the Chuncheon area. This study was conducted to investigate relations between the algal growth in the Lake Uiam and the contribution of nutrients from public sewage treatment works (PSTWs) in Chuncheon city, and based on this to analyze the environmental impact. Nutrients in the Lake Uiam have already been accumulated to the level of eutrophication. Even in winter, the conditions in the lake such as retention time and water temperature were favorable to boost algal growth. After phosphorus treatment processes were introduced, the PSTWs in the Lake Uiam watershed were able to reduce the total phosphorus loads by 43%. The algal concentrations in the Lake Uiam also dropped by about 7%. The nitrogen treatment efficiencies in the PSTWs, on the other hand, remained almost the same after the introduction of the phosphorus treatment processes. To solve these problems more efficiently, it is necessary to develop management strategies for the upstream area of the Lake Uiam and set plans to improve nitrogen treatment operation and management for the PSTWs in Chuncheon.
국내유통 먹는샘물 중의 안티몬 함량 및 용기 이행 특성
허유정 ( Yu Jeong Huh ),양미희 ( Mi Hee Yang ),조양석 ( Yang Seok Cho ),안경희 ( Kyung Hee Ahn ),이연희 ( Youn Hee Lee ),정현미 ( Hyun Mee Chung ),권오상 ( Oh Sang Kwon ),박주현 ( Ju Hyun Park ) 한국물환경학회 2014 한국물환경학회지 Vol.30 No.2
The knowledge on the migration of antimony (Sb) from PET bottles into the water is of greate concern. Antimony in all bottled water marketed in korea and in raw water was analyzed. The detection rate of antimony in total bottled water was 88 % and 100% in PET (Polyethylene terephthalate, PET), 55% in PC (Polycarbonate, PC) bottled water. 55% of raw water contained antimony. The average concentration of Sb in PET bottled water was 0.39 μg/L, higher than PC bottles (0.20 μg/L) and the raw water (0.22 μg/L). The migration of Sb into water that is stored in different conditions (room temperature, 45℃, and direct sunlight exposure) was investigated for 180 days. The migration tendency increased with the storage time and temperature. PET bottles showed a sharp increase of Sb concentration at 45℃, but there was no differences between the room temperature and sunlight exposure. The Sb migration in all simulated solution(deionized water, 4% acetic acid, and 20% ethanol) also increased with storage time and temperature. The Sb migration values ranged from 0.35 to 0.49 μg/L in all simulated solution, which was far below the permissible korean migration level of 40 μg/L. There was a tendency that the number of re-use of a bottle and the amount of leaching were in inverse proportion.
박종환 ( Jong-hwan Park ),김동호 ( Dong-ho Kim ),조양석 ( Yang-seok Cho ),장남익 ( Nam-ik Chang ),한영운 ( Yeong-un Han ),이기완 ( Ki-wan Lee ) 한국환경기술학회 2007 한국환경기술학회지 Vol.8 No.2
분자생물학적 기법을 이용한 남조류의 군집분석을 위해 시료채취 과정과 DNA의 추출, 중합효소 연쇄반응(PCR), 핵산변성물질구배전기영동(DGGE)을 수행하여 일련의 과정을 실험적으로 제시하였다. 기존의 관행적인 분석과 비교하여 남조류의 분자생물학적 기법을 적용한 군집의 해석이 우위에 위치하려면 대량으로 재현성 있으며 신뢰할 만한 분석 방법을 확보하여야 한다. 다량의 시료를 확보하고 분석하기 위해서 일상적으로 사용하는 GF/C 여과지에 시료를 채취하여 DNA 추출 때까지 -20℃에 보관하였다. 남조류 특이적인 16S rDNA를 표적으로 하는 Hot start PCR 방법을 수행하여 약 450 bp의 산물을 얻었다. 이는 분리를 위하여 35%에서 65% 사이의 변성물질 구배를 갖는 아크릴아미드 gel에서 전개되었다. 전개된 각 종의 band는 Syber Green 염색으로 Dark Reader transilluminator에서 확인되고 촬영하였다 Cyanobacteria was collected from Juam Lake by filtration. In the cell concentration step, the filter (GF/C, 47mm diameter) was put on the filtration device, 400 ml Juam Lake water samples were poured into funnel, filtered by vacuum pump and we stored the GF/C filter at -20℃ until they prepared for DNA purification step. For DNA purification, general gram negative bacteria lysis method were used. We adapted PCR primers CYA359F(containing of GC clamp for DGGE) and CYA781R described originally by Nubel et al (1997) for cyanobacterial specific 16S rDNA. Hot start PCR method were used for preventing from non specific annealing. The PCR products were separated on a 1.5 mm-thick vertical gel containing 6% (wt/wol) polyacrylamide and a liner gradient of the denaturants urea and formamide, increasing from 35% at the top of the gel to 65% at the bottom. Electrophoresis was performed in TAE buffer for 17 h at 100V. The gel was stained for 20 min in a kind of SYBR stain and red with a Dark Reader transilluminator. A small piece of gel from the middle of the target band was excised from the DGGE gel and incubated in elution buffer. The eluent was reamplified by using the original primer set and run on agarose gel for confirm its identity.