http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
권오억(Oh Oeg Kwon) 한국위생과학회 2000 한국위생과학회지 Vol.6 No.1
Inorganic nitrogens resulting from fertilizers are possible contaminants of bank-filtered ground water, which is an alternative source of safe drinking water. Soil batch incubation were conducted to investigate the effects of pH, amount of nitrogen, water
김재현(Jae-Hyun Kim),권오억(Oh-Oeg Kwon) 한국환경관리학회 2016 環境管理學會誌 Vol.22 No.2
발전소의 냉각수에 존재하는 해양생물이 냉각계통의 설비에 부착하여 피해를 유발하는 것을 방지하기 위해 이산화탄소(CO₂)를 이용하여 해양생물의 부착 억제 효과를 조사하였다. 해수중에 용해된 CO₂는 초음파에 의한 탈기, 가열에 의한 탈기로도 대기 중으로의 재용출은 거의 일어나지 않는다. 따라서 발전소 냉각계통에 CO₂를 주입하는 경우, 냉각계통의 다양한 지점에서 CO₂의 주입이 가능하고 일단 주입된 CO₂는 냉각계통을 지날 때까지 재용출없이 충분한 효과를 나타낼 수 있다. 파일럿 플랜트 실험에서 CO₂를 주입한 제1계열 반응조 및 염소를 주입한 제2계열 반응조에서는 어떠한 생물종도 관측되지 않았지만, 아무런 처리를 하지 않은 제3계열의 반응조에서는 갯지렁이, 진주 담치 등의 생물종이 성장하는 것이 관측되었다. 해수중의 CO₂주입은 해양생물의 부착 억제 및 성장 억제 효과가 있는 것을 확인할 수 있었다. The increasing of attached marine organisms that exists in the cooling water were damaged cooling system of electric power station. This study investigated the effects of inhibition of attached marine organisms using carbon dioxide. Carbon dioxide dissolved in sea water was not almost released for deaeration by ultrasonography and heating. When carbon dioxide put into cooling system of electric power station, it is possible to put various of sites. Also, it is not released until carbon dioxide pass through cooling system. In pilot plant test, biospecies did not appear both carbon dioxide and chlorine reactor. However, biospecies were observed such as Nereis japonica, mytilus edulis etc. in control reactor. Therefore, it was confirmed that input of carbon dioxide in sea water had inhibition of adhesion and growth of the marine organisms.
권오억 대구산업정보대학 2000 논문집 Vol.14 No.2
Large quantities of nitrogen fertilizers are being used for crop production. The fate of nitrogen at and below the surface is governed by a variety of interrelated and complex processes. The various inorganic and organic forms exist simultaneously and undergo reversible and/or irreversible transformations depending on chemical and microbiological processes. Simultaneously, the physical processes of leaching, diffusion, and possibly ion exchange also are occurring. Therefore, Inorganic nitrogens resulting from fertilizers are possible contaminants of bank-filtered ground water, which is an alternative source of safe drinking water. Soil batch incubation were conducted to investigate the effects of pH, amount of nitrogen fertilizer, water content, oxygen supply and soil temperature on the biotransformation activities of inorganic nitrogens in the near field of bank filtration sites. Soil properties were found to be well equivalent to those of other cultivated field soils in Korea except surface soil pH 4.55±0.55 which is lower than average level. Overall, NH₄^(+)-N level in the field decreased, while N0₃^(-)N increased along with increasing depth of soil. With increased usage of nitrogen fertilizer, nitrification rate increased during incubation time. In batch incubation without sufficient oxygen supply and phosphorous, even if pH was amend with CaCO₃ solution, the nitrification was not quite active than incubation using of respirometer. Under the conditions of 25% of water content, nitrification potential was higher at pH 8 than at pH 5, and was higher at 18% of water content than at 35% under the conditions of pH 7. Nitrification potential under the conditions of varying temperature(10, 20 and 30℃) was highest at 30℃.
權五億,徐承敎,姜善泰 대구산업정보대학 1992 논문집 Vol.6 No.-
Past dicharges of settleable and colloidal organic solids into natural waterways have resulted in appreciable accumulations of sediment in the botton of many lakes, estuaries and river stretches over the years. Under such conditions, bottom sediments, when present, may be come one of the most important factots influencing the quality of natural water. Thus, this study was performed to investigate the nutrients release through chamber experimentation at Gangchang bridge which one of polluted places in Kumho River. The coefficients of sediment oxygen demand for aerobic and anaerobic conditions were 0.864, 5.04 day^(-1), respectively. Also, the release rate of NH₃-N and PO₄-P for aerobic conditions were 0.242g/m²·day, 0.029g/m²·day, and the released rate of NH₃-N and PO₄-P for anaerobic condition were 0.665g/m²·day, 0.186g/m²·day, respectively.
權五億 대구산업정보대학 1993 논문집 Vol.7 No.-
This study was conducted to predict the heavy metals behavior in sediments of 3-Gongdan stream polluted with wastewater. The most predominant fraction of heavy metals in sediments was residual fraction for Cd, Cr, Cu and Pd, reducible fraction for Mn, and carbonate fraction for Zn. Labile fraction of heavy metals were 65.1% of total Cd, 55.5% of total Cr, 60.8% of total Cu, 77.5% of total Mn, 58.8% of total Pb, and 77.4% of total Zn respectively. Most of labile fraction consisted of carbonate fraction for Cd, Cr, Pb and Zn, organic fraction for Cu, and reducible fraction for Mn.