• Proceedings of the Korea Air Pollution Research Association Conference
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• 2000.11a
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• pp.151-151
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• 2000

대기오염물질 배출계수는 국가기관, 연구기관, 학계, 배출사업장, 방지시설업체, 환경영향평가사업 등 수 많은 분야에서 실질적으로 활용하고 있는 자료로서 배출원에 대한 배출특성을 간접적으로 파악할 수 있을 뿐 아니라 기본부과금의 산정, 대기오염방지설비의 설계, 오염저감 계획의 수립 등에 매우 유용하게 활용중에 있다. 현재 가장 많이 활용하고 미국 배출계수(EPA AP-42)는 국내 실정에 부적합한 경우가 많아 국립환경연구원에서는 '99년부터 본격적으로 대기오염물질 배출계수를 개발하고 있다. (중략)

• 한국문화재보존과학회:학술대회논문집
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• 2002.02a
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• pp.37-44
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• 2002

암석이 화학적으로 매우 불균일하기 때문에 암석에 있어서 자연적인 풍화와 인위적인 오염에서 기인한 손상을 구별짓는다는 것은 간단하지 않다. 석재의 화학적인 풍화는 스며든 빗물이나 오염먼지 등에 의해 생성된 물질의 농도변화로 표현되어 진다. 특히 벽면 표면의 두터운 검은 외각과 얇은 검은 막은 미관상으로 뿐만 아니라 암석 자체에도 큰 손상을 끼친다. 일반적으로 이런 검은 물질들은 비 등의 수분과 직접적인 접촉이 없고, 농축된 오염물질들이 쉽게 쌓일 수 있는 곳에서 찾아볼 수 있다. 천연 암석과 마찬가지로 검게 손상된 층 또한 화학적으로 매우 복잡한 체계를 갖고 있어 그 생성 원인과 메커니즘을 규명하는 것이 어려운 일이다. 이 흑색 층은 일반적으로 공기오염물질, 유기물, 철과 망간등의 유색광물의 이동과 침착의 현상에서 생성될 수 있다. 건물들의 외벽에 사용된 여러 종류의 사암과 석회암, 인조석의 표면에는 여러 풍화 손상 형태가 나타나고 있다. 특히 표면에 있는 검은 막의 성질을 알아보기 위해 화학성분을 주성분과 미량성분으로 나누어 측정하였고, 화학적인 특징을 예측하기 위해서 분석자료를 여러 통계적인 방법으로 처리하였다.

• Journal of Hydrogen and New Energy
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• v.29 no.3
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• pp.292-298
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• 2018

The contamination of photovoltaic (PV) cells reduces the incidence of sunlight and reduces the power generation output of PV cells. The main factor influencing the contamination of PV cells installed outdoors is the fine dust in the air, but the influence of temperature, humidity, rain and wind can be considered. In this paper, experiments on the contamination of PV cells according to the fine dust density, the temperature and humidity of air were investigated. As results of this study, the contamination area of PV cells increases with contamination time and cumulative fine dust density in the air. The contamination of PV cells increases when the temperature is low and the humidity is high. Also, as the contamination of PV cells is affected to the wind, the deviation of contamination area is happened.

• Plant Journal
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• v.17 no.2
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• pp.32-41
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• 2021

Recently, air environmental issues such as fine dust have rapidly emerged as national issues, and intensive environmental regulations are being applied to coal-fired power plants. This study introduces the case of improving the performance of desulfurization facilities for removing sulfur oxides and dust, which are the main air pollutant emitters of coal-fired power plants, and conducted four case studies to improve the performance of 1,000 MW power plants currently in operation and carried out construction. Liquid ratio was increased by remodeling the absorption tower of desulfurization facilities, and vaporization reaction was promoted by increasing the flow rate of oxidized air. In addition, the gas heater leakage rate was improved to improve the efficiency of final desulfurization facilities. It is expected that performance improvement work considering harmony with existing facilities will satisfy the regulations(25ppm of sulfur oxides, 5mg/Sm³) that will be applied from 2023, and can be referred to other thermal power plants for review and application.

• 한국문화재보존과학회:학술대회논문집
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• 2005.03a
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• pp.71-88
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• 2005

With biological organism brown pollutants layers are thickly formed on inner stone materials in Gyeongjuseokbinggo(Ice storage in Gyeongju). Some simples were taken from this layer and its chemical composition, mineral composition, salt and microstructures were analyzed. This study shows that the pollutants layer can be removed easily, because it attached softly in stone surface. But because of its serious weathering state the stone surface also can be removed during the removing process. The origins of brown layer are assumed to be the soil in the mound over the Seokbinggo and the coarse sandy soil in the entrance. For the preservation of the Seokbinggo Waterproof and replacement of the coarse sandy soil should take precedence over the remove works. Subsequently moistureproof works should be enforced.

• The Journal of the Korea Contents Association
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• v.19 no.12
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• pp.9-17
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• 2019

The Internet of Things (IoT) is a technology that connects to the Internet with built-in sensors and communication functions on various objects and has been used in various fields such as smart home and smart factory. Recently, as interest in air pollution information such as fine dust is increasing, the apps for providing weather information and air pollution information based on IoT technology are being developed. In this study, we aims to provide visual air pollution and weather information and develop useful services such as appliance automation using this information. for this study, we designed and implemented Smart Services that provide home automation, messaging and alarm, visual air pollution and weather information using air pollution and weather information based on IoT.

• Annual Conference of KIPS
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• 2019.10a
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• pp.1056-1059
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• 2019

본 논문은 SLAM 기술로 3D 매핑하고 태양광 발전기 패널 표면의 오염영역을 파악하여 청소하는 자율비행 드론에 대한 연구이다. 본 프로젝트에서 구현된 드론은 SLAM 기술을 활용하여 3D 매핑과 ROS Topic 통신으로 자율비행을 하면서 카메라로 촬영한 영상에서 태양광 발전기 패널을 파악하고 패널에 있는 얇은 먼지막을 프로펠러에 의하여 발생하는 바람으로 제거한다. 그리고 열화상 카메라로 확인된 고오염 또는 고장으로 인한 발열 부분에 페인트 볼을 떨어트려 시각적으로 표시하고 관리자에게 능동적으로 알린다. 이로 인해 제안된 방법에 따라 넓은 영역에 분포된 다수의 태양광 발전기 패널의 오염정도를 쉽게 파악하고 저오염 영역의 즉각적인 청소 및 고오염 영역의 빠른 보고로 인하여 전반적인 태양광 발전 효율을 제고할 수 있으며, 수동으로 이루어지는 인력 관리에 비하여 오염지역 파악 및 제거 시간이 보다 빠르고 정확하게 이루어질 수 있다.

• Journal of Korean Society of Environmental Engineers
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• v.32 no.1
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• pp.69-78
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• 2010

In order to investigate the degree of household dust contamination, 48 samples of household dust (24 from urban area and 24 from rural area) in Daegu city were collected in vacuum cleaner during January to February 2009. Samples were sieved below 100 ${\mu}m$, and 14 elements (Al, Ca, Cd, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, Pb, V, Zn) were analyzed using ICP after acid extraction. Results obtained from the source assessment of trace elements using enrichment factor showed that Ca, Fe, K, Mg, Mn, Na, and V were influenced by natural sources such as weathered rock and resuspended soil, while Cd, Cr, Cu, Ni, Pb and Zn were influenced by anthropogenic sources such as fuel combustion and waste incineration. Concentrations were remarkably higher in components from natural sources than in components from urban anthropogenic sources. Household dust in urban area was more affected by anthropogenic sources compared with that of rural area. Pollution index of heavy metals revealed that urban area was 1.8 times more contaminated with heavy metal components than rural area. The correlation analysis among trace elements indicated that components were correlated with natural sources-natural sources (Al-Mg, Al-Mn, Fe-Mn) and natural sources-anthropogenic sources (Al-V, Fe-Cr, V-Mn) in both urban area and rural area. Trace element components of rural area were more correlated than those of urban area. Houses that use oil for heating fuel had relatively higher contents of heavy metals rather than those using gas or electricity for heating fuel. Houses with children also had higher contents of heavy metals. In addition, the age of houses was found to influence the heavy metal levels in household dusts, with older houses (>10years) having higher concentrations than newer houses (<10years) and houses located near the major road (<10 m) were found to have relatively higher heavy metal levels in household dust.

• Journal of Bio-Environment Control
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• v.32 no.4
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• pp.312-318
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• 2023

In recent years, fine and yellow dust pollution has become serious in Korea and has negatively affected crop production. Particulate matter (PM) adheres to greenhouse coverings, and it reduces the amount of solar radiation transmitted into a greenhouse. A reduction in light transmittance can have a direct effect on crop photosynthesis and an indirect effect on air temperature in a greenhouse, which can lead to differences in crop yield. The objectives of this study were to investigate the changes in light transmittance of different cover materials by PM and to determine the changes in cucumber growth in a greenhouse due to reduced light transmittance. We measured the changes in light transmittance of polyethylene (PE) and polyolefin (PO) films in the PM generation chambers. Also, cucumber plants were cultivated in a greenhouse with four different light reduction treatments (0, 10, 20, and 30% reduction of light transmittance). The initial light transmittance of PO film was higher than that of PE film and the decrease in light transmittance of PO film due to PM was less than that of PE film. The vegetative growth of cucumber was promoted under the reduced light transmittance treatments; however, the yield of cucumber was highest in the control (0% reduction of light transmittance). From the results, we confirmed that PO film was less PM adhesion and that cucumber yield during the spring season can be reduced by the reduction in light transmittance due to PM.

• Journal of Korean Society of Environmental Engineers
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• v.29 no.7
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• pp.793-800
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• 2007

A total of 48 samples of street dust were collected in Daegu area during April and May 2006, were sieved below 100 ${\mu}m$, and analysed by ICP for the analysis of 14 elements after an acid extraction. Results obtained from the source assessment of trace elements using enrichment factor showed that Ca, Fe, K, Mg, Mn, Na and V were influenced by natural sources such as soil and dust, while Cd, Cr, Cu, Ni, Pb and Zn were influenced by urban anthropogenic sources such as fuel combustion and waste incineration. The measured values were remarkably higher in components from natural sources than in components from urban anthropogenic sources. The concentrations of trace elements in Daegu area were generally higher than in other foreign cities. Samples originated from industrial and commercial areas had higher concentrations of trace elements and pollution indices of heavy metals than those from residential and green areas. The correlation analysis among trace elements indicated that the correlations among components from urban anthropogenic sources were much significant, while those among components from natural sources were less correlated. In addition there were significant correlations between traffic density and components from urban anthropogenic sources.