• Journal of the Korean Applied Science and Technology
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• v.36 no.3
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• pp.866-875
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• 2019

In this study, The Chemical Mass Balance (CMB) model was used to identify pollutant sources and their contributions to $PM_{2.5}$. The contribution rankings by emission source in A city were ash dust (30.1%) > biomass burning (21.9%) > secondary pollutants (21.1%) > mobile source (19.3%) > area sources (7.6%), and The emission sources increased from the contribution of the CMB model and the Clean Air Policy Support System (CAPSS) emissions were biomass burning and secondary pollutants, and The emission sources reduced were mobile source, ash dust, and area sources.

• Journal of Environmental Policy
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• v.12 no.2
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• pp.59-86
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• 2013

We analyzed the correlation among the GHG (Greenhouse Gas) emission, energy consumption and economic growth for the 6 specific regions in Korea by using Panel approaches with the test of the EKC hypothesis. We also analyzed the effects of environmental regulation on GHG and economic growth. The results show that by testing of the EKC (Environmental Kuznets Curve) hypothesis model,the effects of the environmental regulation and the structure of industries on GHC emission have a significant result on the regional analysis for SOx. For the NOx and TSP, only TK region passed the turning point of the EKC among the 6 specific regions. And, for the Co, the Central, Honam and the PUKN region passed the turning point of the EKC. This is because GHG emissions by the environment regulation had a weak path effect and also regional industry structures had a weak relation with regional GHG emissions.

• Journal of the Korean earth science society
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• v.36 no.1
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• pp.125-135
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• 2015

The purpose of this study were to sample particulate matter and analyze its elements and microorganisms for secondary school science project. The particulate matter was sampled on the rooftop a four-store building at a university in Chungju province. A simplified capturing system was developed with the parts, motor-pump, innet, $1.0{\mu}m$ teflon filter, filter-holder, etc. Using the system, this study had sampled particulate matter during Dec., 2013-Jun., 2014. Then, this study analyzed the elements and microorganisms of the sampled particulate matter. Results have been shown that the particulate matter derived China urban area is mainly consisted of the artificial pollutant, such as Cu, Zn, Cd, Ni, Pb. In addition, this study has been shown that microorganisms, such as bacteria and fungi, are included in the particulate matter. Therefore, this study suggests a new systemic investigation and monitoring about the particulate matter, specially originated from China. Also, this study provides a sample for secondary school science experiment.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.11a
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• pp.415-417
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• 2017

국내의 도시화와 중국에서 넘어오는 오염물질에 의하여 대기오염에 대한 피해가 갈수록 커져가고 있다. 하지만 대기오염 집중측정소 6곳에서만 초미세먼지의 구성 성분을 실시간으로 측정하고 있고 그에 대한 자료를 공개하지 않는 것으로 알려져 있다 [1]. 또한 정부는 서비스 개발 및 제공 과정에서 공공성에 대한 고려도 중요하지만, 그것이 얼마나 시민들의 수요나 관심과 결부되어 있는지에 대한 고민도 함께 요구된다. 특히 서울특별시와 같이 대도시에서 거주하는 시민들의 주된 관심사 중 대기오염과 관련한 관심은 지속적으로 높아지고 있다 [2]. 본 논문은 6가지의 센서가 내장된 LED 조형물을 실생활 공간에 배치하고 조형물, 모바일, 웹에서 정보를 실시간으로 제공하는 대기오염 정보 제공 시스템을 제안할 것이다. 일반 대기 측정소와 다른 LED 조형물을 통하여 시민들의 접근성과 편리함을 향상시킬 수 있는 새로운 방식의 대기오염 정보 제공 시스템을 기대해볼 수 있을 것으로 예상된다.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.1086-1087
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• 2015

본 논문에서는 태양전지 모듈의 표면 오염으로 인한 태양광발전량의 감소를 사전 예방하기 위해 영상기술을 이용한 표면 오염도 자동검출 기술에 대해 논의하였다. 일반적인 태양광발전시스템의 경우 태양전지 모듈의 표면 오염원 제거를 위해 사람에 의한 수동적인 방법에 의존하는 것이 현실이나, 커다란 규모의 태양광 발전시설의 경우는 인력으로 오염원을 제거하는 것은 거의 불가능 하다. 이러한 관점에서 태양전지 모듈 표면에 떨어진 오염 물질로 인한 출력감소를 사전에 예방하고, 시스템을 효율적으로 운영하기 위해 이미지 영상기술이 적용되었다. 본 기술은 기본적으로 레이저 광원과 먼지와 상호 interaction을 통해 생성된 반사파 및 이를 CCD 영상으로 획득하고 태양전지 모듈 표면의 오염원의 유무, 균일/불균일 분포 등의 3가지 서로 다른 조건을 설정하여 비교 시험을 수행하였고, 개발된 오염측정 시스템을 수상 태양광 발전 파일럿 설비에 적용하여 운전성능을 검증하였다.

• Korean Journal of Remote Sensing
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• v.29 no.4
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• pp.407-413
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• 2013

The Modified Aerosol Factor (MAF) derived from spectral Single-Scattering Albedo (SSA) values was created to express the light absorption properties according to aerosol types. As a factor of the MAF, slope of a linear regression line for SSA at four wavelengths shows positive value for dust aerosol, while negative values were found for mixing with other types of aerosol. The negative values were shown by anthropogenic and smoke aerosols. The modified SSA at 1020 nm was also calculated. MAF was calculated by summing the slope and modified SSA. MAF was -1.0 for the anthropogenic and smoke aerosol and 1.5 for the dust particles. Those values were decreased by increasing light absorption property.

• Journal of the Korea institute for structural maintenance and inspection
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• v.24 no.2
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• pp.9-14
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• 2020

Four developed patents have applied for a new type of Composite Cyclone Scrubber followed by the previous research (Cho and Kim, 2017), including dust reducing fan with filters. Regarding target installation and maintenance cost, 64% reduction for investment costs (6.2 billion won vs. 17 billion won) compared to existing road pollution reduction system, while social benefit costs increase by 43% compared to existing road pollution reduction measures (72.6 billion won vs. 50.8 billion won). The composition of the device is an air blower type spiral guide vane, and an injection pressure collecting dust efficiency. A nozzle varies Injection angle and contact range, spray liquid species (waterworks, salty water). The proposed patent tests are circulation water Time-by-Time Spray and collected 41.4% more increased micro dust since the sprayed water meets contaminated gas due to the 45° degree colliding, which is 141% increased conventional dust collector. (Ratio of collection over 85%). As regards the source of collection liquid, circulated rainwater and well water, we expect a huge amount of energy and economically saved eco-friendly system in our patent. Finally, the guided vane and metal filter reduced over 90% micro-dust, while sprayed water cleans the vane and filters, resultantly minimizing the maintenance budget. The preliminary evaluations of the developed design make it possible to reduce not only cheaper maintenance budget due to the characteristic water spraying but the cost of water comes from mainly rain and underground.

• Korean Journal of Remote Sensing
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• v.34 no.5
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• pp.763-775
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• 2018

In this study, the effects of wind fences on the dispersion of the particles emitted from a constructing site located in the building-congested area in Busan, Korea, using geographic information system (GIS) and a computational fluid dynamics (CFD) model. We averaged the wind speeds observed for 10 years at the Busan automated synoptic observing system (ASOS) and we used the averaged wind speed as the wind speed at the reference height (10 m above the ground level). The numerical simulations were performed for 16 inflow directions, before and after the construction of wind fences with the heights of 5 m and 10 m (total 48 simulations). The detailed flows were analyzed for the northeasterly and south-southwesterly cases which predominantly observed at the Busan ASOS. In the northeasterly case, high concentration appeared at the elementary school next to the construction site due to transport by the airflow coming from the northeast. In the 5-m wind fence case, the wind speeds were slightly weaker and the spread of the fugitive dust was slightly less than those in the no wind fence case. In the 10-m wind fence case, the dust concentration at the elementary school has the maximum reduction of 37%. In the south-southwesterly case, the flow pattern became complicated in the construction site due to the terrain and buildings. Fugitive dust was stagnant at the south side of the construction site but rather spread to the north, increasing the concentration at the elementary school. After the wind fence was built, the concentrations inside the construction site became high as the wind speeds decreased inside, but, the concentrations in the elementary school rather decreased.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2003.05b
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• pp.371-372
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• 2003

서울의 지하철은 하루 450만 명 정도를 수송하는 중요한 대중교통 수단이다. 지하철 역사 내의 실내 환경에 대한 실내공기질 관리는 실내공기 오염의 대상물질에 대한 특정유해물질과 같은 단일 물질에 대한 지표에 의해 관리되고 있다. 그러나 공기중 입자상 물질의 특성은 복합적이기 때문에 공기질에 대한 관리는 여러 제한점을 가지고 있다. 또한 역구내의 먼지에 대한 단순 측정ㆍ분석만이 이뤄지고 있을 뿐 그 먼지의 생물학적 영향에 대한 연구는 미흡한 실정이다 본 연구에서는 지하철역 구내에서 포집한 미세먼지가 돌연변이원을 함유하고 있는 지를 여름과 겨울철에 대한 비교 평가하였다. (중략)

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2003.11a
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• pp.108-110
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• 2003

서울지하철역사내의 미세먼지농도는 환기에 의한 외부대기오염의 영향이 크다는 그간의 주장과 연구조사내용과는 달리 금번 이와 관련한 일련의 조사연구에서 그의 대부분이 내부 source에 의하여 결정되는 것을 확인하였다. 그의 중요한 source로서는 운행회수 1일 4226회에 의한 레일과 바뀌, 팬토그래프와 급전시설의 마찰, 1일 이용인원 5,481,000명에 의한 바닥과 신발의 마찰에 의한 마모와 발진현상과 사람들간의 접촉에 의한 섬유상 먼지의 비산, 그리고 역사내부의 서어비스업체등에서 음식조리시 부적적한 환기시설로 인한 것 등이 주요한 요인으로 생각되나 열차의 빈번한 출입으로 인하여 발생하는 열차풍에 의한 번지발생은 source의 큰 부분을 차지한 것이라는 전제하에 본 조사를 실시하게 되었으며 그의 영향정도를 파악하였다. (중략)