Flyash Filter에 의한 핵종포집의 모델링

김전희 ( Jeon Hee Kim ) 조선대학교 공학기술연구원 2013 공학기술논문지 Vol.6 No.2

Aarious radionuclides such as Cs, Rb, Mo, Cd, Ru, Tc, and I are emitted from the off-gas stream of nuclear facilities (pyro-processing pretreatment system). For effectively trapping of radionuclides, characterization and theoretical trapping by the development of model in a variety of operating conditions is required. This study presents modeling andsimulation for trapping of radionuclides (Cs, Rb, etc.) using fly ash filter and fly ash ball filter. Radionuclides are flow into a column filled with fly ash filter or fly ash ball filter (Cartridge) and it is assumed that the experiments are shown underisothermal condition. The fly ash filter has an inner diameter of 45 mm, a thickness of 10 mm, an average weight of about 7 g. Also this filter has a 10 m2/g specific surface area and 30% porosity. The main goals of this work are systematically to investigate model of the high temperature adsorption equilibrium and high temperature adsorption dynamic characteristics of gaseous radioactive nuclides (Cs, Rb, etc).

차 문화 활동의 참여 동기가 참여 정도와 참여 만족 및 삶의 질에 미치는 영향

김전희(Jeon-Hee Kim),유가효(Ka-Hyo Yoo) 한국차학회 2014 한국차학회지 Vol.20 No.2

This study examined how the motive for participation in tea cultural activities, participation level, and satisfaction from participation influence the quality of life. A total of 576 questionnaires from a tea cultural activities club were analyzed statistically. The results showed that there was no direct motive for participation satisfaction in tea cultural activities, and the satisfaction from participation had an effect on the quality of life. Overall, the motive for participation in tea cultural activities improve the quality of life directly or indirectly. In particular, the achievement-related motivation improves the level of satisfaction from participation in tea cultural activities and the quality of life. This shows that the qualitative aspect of the tea cultural activities is more important than the quantitative aspects of participation, and it is necessary to improve the qualitative aspect of tea cultural activities including the contents of experience programs. This study revealed the influential factors in the participation of tea cultural activities on the quality of life empirically and examined the contribution of tea cultural activities in improving the quality of life.

광촉매를 이용한 수중의 Benzene 처리의 산회처리특성

류일광(Il-Kwang Ryu),김전희(Jeon-Hee Kim) 한국환경관리학회 2001 環境管理學會誌 Vol.7 No.3

전기흡착 공정에서 다공성 탄소나노전극의 탈염 특성

박보배 ( Bo Bae Park ),김전희 ( Jeon Hee Kim ) 조선대학교 공학기술연구원 2013 공학기술논문지 Vol.6 No.2

Electrosorption is a promising method for water purification and desalination. Activated carbon electrode with commercially viable mechanical strength, electrosorption capacity, and electrochemical properties were fabricated, and their kinetic characteristics were determined. The carbon electrodes were obtained by coating activated carbon powder with 10 wt% polyvinylidenefluoride (PVdF) binder in a thin sheet-like formulation for the electrosorption process. The electrosorption efficiency of activated carbon electrodes prepared with 10 wt% PVdF was 30% at sodium chloride concentration and applied potential of 200 mg/L and 1.2 V, respectively. Thus, the performance of the ACS electrodes in this study indicates that they are suitable for electrosorption applications.

高脂肪食餌로 飼育한 흰쥐의 血淸 및 肝臟脂質에 미치는 靈芝의 影響

曺秀悅,朴美梨,金典姬 嶺南大學校 環境問題硏究所 1988 環境硏究 Vol.8 No.1

This experiment was undertaken to investigate the effect of Ganoderma lucidum on lipid of serum and liver in rats fed with high fat diets. Thirty-five male rats of Sprague-Dawley strain weighed 100± 10g were divided into 5 groups and fed control diet(CD), CCI₄-supplemented diet (CDT), high fat diet(CDF), CCI₄ plus Ganoderma lucidum diet (CDTG), and high fat plus Ganoderma lucidum diet (CDFG) for 7 weeks. No differences in the net weight gain were found among the groups tested. Food intake and stool weight were not significant but showed high tendency in Ganoderma lucidum containing group. Liver weight and GOT activity were significantly increased by supplementation with CCI₄ but slightly decreased by Ganoderma lucidum supplementation. Contents of cholesterol in serum were significantly increased by CCI₄ or high fat supplementation However, it showed low tendency in Ganoderma lucidum containing group. Contents of total lipid, cholesterol in liver were not significant. However, thoes of CCI₄-supplemehted group or high fat diet group showed high tendency and were slightly decreased by Ganoderma lucidum supplementation.

환경기초시설 중 하·폐수처리과정으로부터의 GHG 배출량 예측 : 광주·전남지역을 중심으로 Kwang ju·Chollanado

전의찬,김전희,송민종 동신대학교 환경연구소 2000 환경연구 Vol.5 No.1

본 연구는 환경기초시설 중에서 생활하수와 산업폐수 처리장에서 발생하는 특히 광주·전남 지역을 중심으로 온실가스의 배출량과 장래 저감 잠재성을 평가하고, 기후변화협약을 대비한 국가 Inventory의 기초자료로 이용될 수 있도록 하였으며, 결론적으로 하ㆍ폐수부문에서 온실가스 배출 잠재성을 감소시키기 위한 방안으로 먼저 하수 및 폐수의 체계적인 수집이 이루어져야 하며, 수집된 하ㆍ폐수는 반드시 적절한 처리과정을 통하여 수계에 배출되어져야 한다. 또한 적절한 처리과정 중에 배출되는 온실기체의 대기 중으로의 누설을 억제하고 회수율을 높이는 관리대책이 수립되어야 하며, 회수율을 높이는 대책은 하ㆍ폐수부문에서 온실가스 배출 잠재력에 대한 저감율에 대하여 좀더 효율적임을 알 수 있다. 또한 상기와 같은 저감방법 외에도 하ㆍ폐수부문에서의 온실가스 저감잠재력을 위하여 정부는 온실가스 배출량을 계산하는데 필요한 여러 가지 자료를 확보하고, 좀더 신뢰할 수 있는 온실가스 배출량을 산출하며, 이들 자료를 토대로 정부는 하ㆍ폐수부문에서의 온실가스 저감잠재력을 위하여 연차적으로 관리대책을 설정해야 한다. 그리고 이에 대한 검중체계를 마련하여 전ㆍ후 효과분석을 해야 할 것이다. This study evaluated greenhouse gas(GHG) emissions and future reduction potential emitted from domestic and industrial wastewater treatment system in Kwangju city and Chollanamdo. For decreasing of GHG emissions potential, systematic collection method of domestic and industrial wastewate is established and collected domestic and industrial wastewater is treated reasonal wastewater treatment process. GHG which is leak from wastewater treatment process to air was controled, Control policy which are increasing recovery ratio was established. In addition to decreasing method, Government make sure of variable data fro estimating GHG emissions quality and evaluated GHG emissions quality reliable method.

이산화티타늄계 광촉매를 이용한 벤젠의 처리 특성

전의찬,송민종,김전희 동신대학교 환경연구소 1999 환경연구 Vol.4 No.1

An available methods for abating VOC(including Benzene) are thermal or catalytic incineration, liquid absorption, solid adsorption, condensing, membranes, biodegradation and plasma discharge, but a number of defects are these VOC abating methods, including ; requires a auxiliary fuel, generate secondary pollutants(waste catalysts, waste absorbents, waste adsorbents, ozone, etc.), a large scale, etc.. But photoactive catalysts, when illuminated with UV-light, generate highly reactive radicals that can oxidize the organic contaminants in gas. One methods to increase the efficiency of the process, and thereby reduce the light energy requirement, is by developing more active catalysts. Because of, ball type TiO₂ catalyst were obtained commercially and/or prepared in laboratory were examined for their photoacivity, and they are TiO₂ added some annex(Al₂O₃, SiO₂, KsO, P₂O_(5), etc.). The organic compounds used to identify the best photo catalysis condition were benzene. This study also examined the impact of catalyst structure, light intensity, existence of oxygen as an electron acceptor and Benzene initial concentration on the reaction kinetics. Labratory experiments were performed to investigate TiO₂ photo catalysis for treating test gas contaminated with Benzene. and TiO₂ photo catalysis efficiency for mineralization of Benzene is also evaluated. The photo oxidation of Benzene was carried out in a photo catalytic reactor at room temperature. I performed BTX photo catalytic oxidation experiments using a single-pass annular reactor. The organic-contaminated gas was prepared in Teflon sampling bag(25L) and passing through photo catalytic reactor by vacuum pump which is located reactor outlet. The BTX diluted with mixture air or nitrogen gas. Flow rates for test gas stream were controlled by micro flow meter going out the reactor. The reactor illuminated with 15W near-UV lamp, BLB lamp or Fluorescent lamp. The light intensity at the catalyst surface were estimated to be 0.8 to 6mW cm-2s-1. The inner cell of the reactor was packed with ball type titanium dioxide(Ø 6mm). Benzene was determined by GC-FID of gas samples taken from the a glass sampling bulb which was located at reactor outlet by gas-tight syringe. TiO₂ photo catalysis for treating test gas contaminated with Benzene. and TiO₂ photo catalysis efficiency for mineralization of Benzene is also evaluated. Using the anatase type photo catalyst, Benzene conversion rate is greater than that of rutile(92% conversion of 100ppmv Benzene using anatase type photo catalyst, 80% conversion of 100ppmv Benzene using rutile type photo catalyst at 0.5L/min) Effect of light intensity on the rate of Benzene photo catalytic decomposition was investigated by three type lamps within the reactor. When light intensity to increase, the Benzene conversion rate to increase. Using the BLB lamp showed higher activity than the Fluorescent lamp, but UV lamp showed the hight photo catalytic activity(26% conversion of 100ppmv Benzene with Fluorescent lamp, 63.5% conversion of 100ppmv Benzene with BLB lamp, 92% conversion of 100ppmv Benzene with UV lamp at 0.5L/min). Experiments with added oxygen as an electron acceptor improved the reaction rate considerably(92% conversion of 100ppmv Benzene without oxygen, 66.1% conversion of same Benzene concentration with mixture air at 0.5L/min). The Benzene conversion rate begins to decrease while Benzene initial concentration begins to increase. We have thus concentrated our effects on the study of Benzene degradation kinetics in vary initial Benzene concentration.

超音波의 水處理 適用 可能性을 위한 實驗的 硏究

김성동,김전희,염승렬,백순기 동신대학교 환경연구소 1997 환경연구 Vol.2 No.1

BOD, 질소, 인 등이 다량으로 함유된 고농도 유기성 폐수는 BOB, 인, 질소 등 일부 오염물질의 농도가 현저하게 높거나 C/N비의 균형이 좋지 않은 특성 때문에 처리가 곤란할 뿐만아니라, 적정한 처리공정을 도입하는 것 또한 어려운 실정이다. 이에 따라 고농도 유기성 폐수 배출시설중 화학공장의 폐수를 처리대상 폐수로하여, 각각의 공정에서 배출되는 다른 성상의 폐수를 합한 원폐수를 초음파를 이용하여 무화(霧化 : fogginess)시킨 후 무화 전후의 BOD, COD, SS, N-H과중금속의 제거율을 분석한 결과, BOD, 55, N-H의 제거율은 높았으며 중금속의 제거에는 영향을 미치지 않는 것으로 나타났다. High concentration organic wastewater has been discharged out of industries. These industries are food industries, chemical industries, fiber industries, spinning factories, paper mill manufactories or night soil and stock breeding. Its wastewater was treated to fogginess using Ultrasonic Wave. Due to development of wastewater treatment technique, it is investigated by technique previous to the treatment. Acording to fogginess frequency, it was analysised variation of pollutants concentration. The conclusions are as fallows. Most pollutants were removed by fogginess using Ultrasonic Wave, while heavy metals were not removed Removal effect of BOD, COD, SS, N-H, T-N, T-P developed a tendency to decrease according to frequency.

고급산화기법을 이용한 수중의 BTXs 처리 특성

김전희,송민종,백순기 동신대학교 환경연구소 1999 환경연구 Vol.4 No.1

본 연구에서는 광산화공정의 실험으로 자외선과 산화제에 의한 BTXs의 제거특성을 파악하기 위하여 실험장치를 실험실규모로 제작하여, 광원의 세기, 산화제의 종류 및 주입량(오존 및 과산화수소) 둥을 변화시키면서 접촉시간에 따른 BTXs의 처리효율을 분석한 결과는 다음과 같다. UV 강도변화에 따른 BTXs의 제거특성은 UV, 강도가 증가함에 따라 광분해가 향상되었고,특히 UV 강도가 30W가 15W일 때 보다 7.9%의 상승효과를 보인 xylene이 제거가 잘되었다. UV/H202 공정에서 H2O2의 주입량이 200 mg/L일 때 제거효율이 약간 높은 효율을 보였으며, UV와 H2O2를 이용한 처리에서 xylene > toluene >benzene의 순으로 제거효율이 나타났고, UV/H202/03 공정에서 H202/03의 비가 2일 때 처리대상물질의 제거효율이 높은 것으로 나타났다, 특히 toluene의 제거효율은 H202/03의 비가 3일 경우에 91.5%로 처리가 잘되는 것으로 나타났다. Laboratory experiments were performed to investigate removal efficiency of BTXs in water for advanced oxidation processes. Parameters using experiment is change of UV intensity, oxidant(H₂0₂, 0₃). The conclusions are as follows. ; Effect of light intensity on the rate of BTXs removal was investigated by three type lamps within the reactor. When light intensity to inscrease, the BTXs removal efficiency to increase. And treatment of BTXs with light had an effect on xylenes. Consequently, simultaneous treatment of UV/H₂0₂/0₃ was more effective than individual treatment of 0₃, H₂0₂.

오존처리의 고급산화법에 의한 衛生處理場 放流水 處理

김경환,유수현,김전희,백순기 동신대학교 환경연구소 1997 환경연구 Vol.2 No.1

본 연구는 위생처리장 방류수를 효과적으로 처리할 수 있는 방법을 모색하기 위한 기초연구로써 수행되었다. 본 연구를 수행하기 위하여 O₃을 이용하였으며, 분뇨처리수를 재처리하여 pH, 색도제거효과, COD 제거효과, T-N NH₃-N NO₃-N 등을 분석하였다. 분석을 통한 연구결과로서 O₃에 의한 색도의 제거는 86.3%정도로 나타났고, COD는 30분 접촉시 COD가 25.2%의 제거율을 보였다. 그러나 시료중의 질소성분에 대한 제거율은 거의 영향이 미치지 않는 것으로 나타났다. This study is aimed to research treatment of Night Soil Plants effluent by using O₃, and in the points of pH, Color, COD, T-N, NH₃-N, NO₃-N, and treatment efficiency are investigated. O₃ concentration is 38.8 mg/ℓ, contact times are 10, 20, 30, 40, 50, 60 min increasingly. Optimum efficiency is in the case of 30 min contacting. The result of optimum efficiencis are as followings; 1. Color is removed 86.3%. 2. COD is removed 25.2%. 3. NH₃-N is converted to NO₃-N, and T-N concentration variation is not detectable. 4. O₃ is reasonable to remove color, because it has strog oxidation power to conjugated double bond in the chrome group especialy.