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유재윤(Jae Yun Yoo),송용우(Yong Woo Song),김민영(Min Young Kim),박진철(Jin Chul Park) 대한설비공학회 2020 대한설비공학회 학술발표대회논문집 Vol.2020 No.6
This research conducted an experiment using a coating agent mixed with TiO₂ photocatalyst to reduce NOx. Among the air pollutants, NOx and SOx, which are the precursors of secondary products that generate ultra-fine particles, can be reduced by using TiO₂. The TiO₂ photocatalyst can be used by mixing with building materials, which can reduce particulate matter. ISO 22197-1, a test method that can evaluate the NOx reduction of TiO₂ photocatalyst, was conducted by applying the same test method, and the concentration of NO gas in the atmosphere was lower than 1.000 ppm, so the concentration change was confirmed at 0.500 and 0.250 ppm. The reduction of NOx and NO was confirmed through experiments, and further research on the change in NOx concentration of equipment using methods that can be applied in real life, such as residential facilities and multi-use facilities, is deemed necessary.
실험실에서 UV 광량 변화에 따른 광촉매 코팅제의 실내공기오염물질(HCHO) 저감 실험
유재윤(Yoo, Jae Yun),송용우(Song, Yong Woo),박진철(Park, Jin Chul) 대한건축학회 2021 대한건축학회 학술발표대회 논문집 Vol.41 No.2
Indoor air pollutants are classified as organic, inorganic, and biological. Indoor environmental pollution is affected by environmental conditions such as ventilation, temperature, and humidity. Affected by pollutants emitted from building materials, etc. TiO₂ photocatalysts can be applied to remove them. In this study, the effect of reducing HCHO, one of the indoor pollutants, was confirmed by applying TiO₂ photocatalysts. The test method proposed in ISO 22197, and the reactor was manufactured and experimented accordingly. As a result, The increase in UV-A light intensity also increased the decrease in HCHO, and the increase in the decrease was not uniformly increased. It is planning to conduct a change experiment in the efficiency of removing HCHO according to the processing flow rate inside the reactor.
김재훈 ( Jae Hoon Kim ),최형태 ( Hyung Tae Choi ),유재윤 ( Jae Yun Yoo ) 한국환경생태학회 2015 한국환경생태학회지 Vol.29 No.6
본 연구는 침엽수 인공림에서 산림 유역내 및 유역출구점에서 용존물질 농도의 특성을 밝혀보고자, 2005년부터 2007년까지 경기도 국립수목원 소재의 침엽수 시험림에서 pH, EC, 양이온, 음이온, 산중화능을 조사하였다. pH는 평균 6.87로 봄에 낮은 경향을 나타내는데, 수관층에 포집된 강하물의 영향으로 판단된다. EC는 평균 58.4μS/㎝으로 강수량이 적은 봄에 이온의 양이 상대적으로 많아 계류수에서 높을 값을 나타냈다. 양이온과 음이온은 강우로 인해 봄과 가을철에 높게 나타났다. 다른 유역과의 수질 비교에서 EC는 강우량이 많은 여름철에 낮게 나타나는 경향을 보였으며, NO3 -는 강하물 및 시업의 영향으로 계류수에서 높게 나타나는 것으로 판단된다. 본 연구대상유역의 경우, 계류수내 pH와 ANC가 일정 수준으로 유지되는 것으로 나타났다. This study was carried out to investigate pH, EC, solutes concentration and ANC characteristics in coniferous forest experiment watershed in Gyeonggi-do, Korea from 2005 to 2007. The average pH value was 6.87 and low at spring season due to deposition in crown. The average EC was 58.4μS/㎝and was high at spring season due to high concentration of solutes. The cation and anion concentration was high at spring and fall season with low rainfall. When stream water quality was compared to different watershed, EC was relatively low due to high rainfall and NO3- was high due to deposition and forest practice. pH and ANC was relatively constant at stream water
침엽수 인공림에서 강우사상별 계류수 수질의 유출특성 변화
김재훈 ( Jae Hoon Kim ),최형태 ( Hyung Tae Choi ),유재윤 ( Jae Yun Yoo ) 한국환경생태학회 2015 한국환경생태학회지 Vol.29 No.6
본 연구는 침엽수 인공림에서 강우와 유출에 따른 계류수 용존이온의 특성 밝혀보고자, 경기도 국립수목원 소재의 침엽수 시험림에서 강우, 유량, 용존이온을 조사하였다. 2005년 6월부터 2008년 9월까지 총 23개의 강수사상별 수질시료를 채수하여 분석한 결과 API 값이 낮을수록 유출량이 적었다. 유량변화에 따른 용존이온 특성으로는, NH4+, K+,Ca2+ 이온은 시계 방향, Cl-, NO3- 이온은 반시계 방향의 이력곡선을 나타냈으며, SO42-, Na+, Mg2+ 이온은 이력현상을 보이지 않았다. Cl-, Na+, NH4+는 지하수의 영향으로 강수 이전 수준으로 농도가 유지되는 것으로, NO3-는 토양수의 영향으로 강수 이전 보다 높은 농도는 나타내는 것으로 판단된다. Cl-, SO42-, Na+, Mg2+, Ca2+ 이온은 유출량 증가에 따라 강한 희석반응을 보였고, NO3- 이온은 유출초기 희석 후 농도가 증가하였다. NO3 -, Ca2+ 이온은 강수 초기에세탈효과를 나타냈다. 유출량 변화에 따른 이러한 농도변화 특성은 선행강수, 유출량, 지하수 등의 영향으로 판단된다. This study was carried out to investigate solutes concentration change with respect to discharge change in coniferous forest experiment watershed in Gyeonggi-do, Korea. From 2005 to 2008. Precipitation, discharge, solutes has been analyzed from 23 precipitation events. The results showed that low API induced low discharge. NH4 +, K+, and Ca2+ were indicated by clockwise and Cl- and NO3 - were represented by counterclockwise hysteresis loop. SO4 2-, Na+, Mg2+ showed no hysteresis loop pattern. Cl-, Na+, NH4 + was relatively constant due to groundwater during precipitation, NO3 - was increased due to soil water compared to early precipitation. Cl-, SO4 2-, Na+, Mg2+, Ca2+ was diluted with respect to increased discharge and NO3 - was diluted in early precipitation and then increased in the end. NO3 - and Ca2+ eluviated in early precipitation. This characteristics was presumed by the effect of API, discharge and ground water.