• Title/Summary/Keyword: 먼지 오염도

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Emission Characteristics of Particulate Matter and Heavy Metals from Coal Fire Power Plants (석탄화력발전소에서 배출되는 입자상물질 및 중금속 배출 특성)

  • 장하나;유종익;이성준;김기헌;석정희;서용칠;석광설;홍지형
    • Proceedings of the Korea Air Pollution Research Association Conference
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    • 2003.11a
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    • pp.89-90
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    • 2003
  • 석탄화력발전소에서는 다양한 유해물질이 발생한다 먼지, 미세먼지, 유해중금속, 황산화물(SOx), 질산화물(NOx) 등이 그것인데, 이중 황산화물과 질산화물등은 기존 방지장치로 비교적 제어가 용이하다. 반면에, 미세먼지와 유해중금속은 대기중으로 상당량이 배출되어 인체에 심각한 피해를 끼치고 있다. 우리나라 대기환경보전법에서는 대기오염물질을 가스상 물질과 입자상 물질로 구분하고 있다. 이중 입자상물질은 그 입도의 분포가 수십 나노미터에서 수십 마이크론까지 광범위하고 입도에 따른 환경위해성도 다르다. (중략)

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Distribution of Air Pollutants in Northeast Asia According to Synoptic Meteorology in May 1999 (1999년 5월 종관기상 변화에 따른 동북아지역 대기오염물질의 분포 특성)

  • 김진영;김영성;원재광;윤순창
    • Proceedings of the Korea Air Pollution Research Association Conference
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    • 2002.04a
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    • pp.101-102
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    • 2002
  • 동북아시아 지역은 전 세계적으로 인구가 조밀하고 경제발전 속도가 빠른 지역으로, 이에 따라 막대한 양의 대기오염물질이 배출되고 있다. 이 지역의 대기오염 특성으로는 (1) 막대한 양의 인위적인 대기오염물질 배출, (2) 흙먼지의 배출, (3) 편서풍을 들 수 있다 (문길주 등, 1996). 본 연구에서는 동북아시아 지역을 대상으로 기류이동의 변화에 따라 대기오염물질의 분포가 어떻게 달라지는가를 보고자 하였으며, 이를 위하여 우리나라 시간으로 1999년 5월 6-7일과 5월 11-12일의 바람장 및 대기오염물질의 농도 변화를 비교 분석하였다. (중략)

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Signal Processing for Stabilizing Output of Fine Dust Sensor (미세먼지 센서 출력의 안정화를 위한 신호처리)

  • Jung, Sang-Wook;Park, Jun-Hyeon;Kim, Ju-An;Kim, Jae-Wook;Cheon, Bong-Won;Kim, Nam-Ho
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2018.05a
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    • pp.344-346
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    • 2018
  • Air pollution has become a social issue. Particularly, interest in fine dust is increasing. Various kinds of sensors are being used to measure fine dust. The most commonly used infrared detection dust sensors operate by sensing the diffraction of light through an infrared receiver and sensing the light reflected by the dust in the air. However, this method has a drawback in which accurate data analysis is difficult due to deviation caused by the noise during measurement. In order to overcome such drawbacks, in this thesis, a low pass filter algorithm of FIR(Finite Impulse Response) filter was designed and implemented.

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A Topic Analysis of Fine Particle Matter by Using Newspaper Articles (신문기사를 이용한 미세먼지 이슈의 토픽 분석)

  • Yang, Ji-Yeon
    • The Journal of the Korea Contents Association
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    • v.22 no.6
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    • pp.1-14
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    • 2022
  • This study aims to identify topics in newspaper articles related to fine particle matter and to investigate the characteristics and time series trend of each topic. Related national newspaper articles during 1990 and 2021 were collected from Bigkinds. A total of 18 topics have been discovered using LDA, and 11 clusters deduced from clustering. Hot topics include related products/residence, overseas cause(China), power plant as a domestic cause, nationwide emergency reduction measures, international cooperation, political issues, current situation & countermeasure in other countries, and consumption patterns. Cold topics include the concentration standard and indoor air quality improvement. These findings would be useful in inferring the political direction and strategies. In particular, the consumer protection policy should be expanded as the related market is growing. It will also be necessary to pursue policies that will promote public safety and health, and that will enhance public consensus and international cooperation.

Spatial panel analysis for PM2.5 concentrations in Korea (공간패널모형을 이용한 국내 초미세먼지 농도에 대한 분석)

  • Lee, Jong Hyun;Kim, Young Min;Kim, Yongku
    • Journal of the Korean Data and Information Science Society
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    • v.28 no.3
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    • pp.473-481
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    • 2017
  • It is well known that the air quality of 92% of the world is known to exceed the standard of WTO and the death caused by air pollution is almost 6 million per year. The $PM_{2.5}$ concentration in Korea is the second most serious among the OECD countries following Turkey. Since the $PM_{2.5}$ has a direct effect on the respiratory system, it has been actively studied in domestic and foreign countries. But current research on the $PM_{2.5}$ is limited in weather factor or air pollutants. In this paper, we consider the influence of spatial neighbor with weather factor or air pollutants using spatial panel model. We applied the proposed method to 25 borough of Seoul in Korea. The result shows a significant effect of spatial neighbor on the $PM_{2.5}$ concentration fields.

A Study on Economic Analysis and Improvement Policy Support for the Expansion of Natural Gas Vehicles - Focused on the Large Diesel Bus (천연(天然)가스 자동차(自動車) 보급(普及) 확대(擴大)를 위(爲)한 경제성(經濟性) 분석(分析)과 정책지원(政策支援) 개선(改善)에 관(關)한 연구(硏究) - 대형(大型) 경유(輕油)버스를 중심(中心)으로)

  • Joo, Gil-Mo;Kang, Seung-Jin
    • Journal of the Korean Institute of Gas
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    • v.21 no.6
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    • pp.70-80
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    • 2017
  • According with annual report by the OECD (Organization for Economic Co-operation and Development), South Korea is at the top of the list of countries with bad air pollution (fine dust particles) and the South Korean government announced the cause to be due to the particle emissions of large and old diesel vehicles. To solve this issue, the government (jointly with related ministries), promoted the "Special Measures for Comprehensive Fine Dust Management Program" as a way to improve environmental pollution by reducing the overall output of fine dust particles emitted by public vehicles. The measure implemented a gas subsidy system to convert eco-friendly vehicles of city and chartered buses throughout the country. In this study, we take a look at the economical evaluation, comparison and analysis of the conversion of diesel vehicles to natural gas (CNG) vehicles. This report represent the basis for the need to expand the funds of the subsidy program and reviews the feasibility of the policy by taking into consideration the social and economical benefits and the effect in the environment when converting diesel fuel to natural gas vehicles through the type-specific fuel conversion scenarios.

An Analysis on the Episodes of Large-scale Transport of Natural Airborne Particles and Anthropogenically Affected Particles from Different Sources in the East Asian Continent in 2008 (2008년 동아시아 대륙으로부터 기원이 다른 먼지와 인위적 오염 입자의 광역적 이동 사례에 대한 분석)

  • Kim, Hak-Sung;Yoon, Ma-Byong;Sohn, Jung-Joo
    • Journal of the Korean earth science society
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    • v.31 no.6
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    • pp.600-607
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    • 2010
  • In 2008, multiple episodes of large-scale transport of natural airborne particles and anthropogenically affected particles from different sources in the East Asian continent were identified in the National Oceanic and Atmospheric Administration (NOAA) satellite RGB-composite images and the mass concentrations of ground level particulate matters. To analyze the aerosol size distribution during the large-scale transport of atmospheric aerosols, both aerosol optical depth (AOD; proportional to the aerosol total loading in the vertical column) and fine aerosol weighting (FW; fractional contribution of fine aerosol to the total AOD) of Moderate resolution Imaging Spectroradiometer (MODIS) aerosol products were used over the East Asian region. The six episodes of massive natural airborne particles were observed at Cheongwon, originating from sandstorms in northern China, Mongolia and the loess plateau of China. The $PM_{10}$ and $PM_{2.5}$ stood at 70% and 16% of the total mass concentration of TSP, respectively. However, the mass concentration of $PM_{2.5}$ among TSP increased as high as 23% in the episode in which they were flowing in by way f the industrial area in east China. In the other five episodes of anthropogenically affected particles that flowed into the Korean Peninsula from east China, the mass concentrations of $PM_{10}$ and $PM_{2.5}$ among TSP reached 82% and 65%, respectively. The average AOD for the large-scale transport of anthropogenically affected particle episodes in the East Asian region was measured at $0.42{\pm}0.17$ compared with AOD ($0.36{\pm}0.13$) for the natural airborne particle episodes. Particularly, the regions covering east China, the Yellow Sea, the Korean Peninsula, and the east Korean sea were characterized by high levels of AOD. The average FW values observed during the event of anthropogenically affected aerosols ($0.63{\pm}0.16$) were moderately higher than those of natural airborne particles ($0.52{\pm}0.13$). This observation suggests that anthropogenically affected particles contribute greatly to the atmospheric aerosols in East Asia.

Planting Design Strategies and Green Space Planning to Mitigate Respirable Particulate Matters - Case Studies in Beijing, China - (미세먼지 저감을 위한 식재기법 및 도시 녹지계획 방향 - 중국 베이징시 사례를 중심으로 -)

  • Xu, Xi-ran;Kim, Jin-Oh
    • Journal of the Korean Institute of Landscape Architecture
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    • v.45 no.6
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    • pp.40-49
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    • 2017
  • The purpose of the research is to analyze the recent cases of green space planning and planting design in Beijing, one of the cities having the worst particulate matters (PM) pollution. This study comprehensively reviewed Chinese academic literature addressing green space planning to reduce PM pollution. In addition, we conducted field observations and interviews with public officials from Beijing Municipal Bureau of Landscape Design in charge of planning and management of green spaces in Beijing. After the extensive review of literature we derived tree planting principles to mitigate the impact of PM from urban road system, residential area, and industrial district. Using the principles we evaluated the three recent cases of planting design to mitigate PM: Beijing Fuxing Road, Fu Run Residential Area and Beijing Beiqi Multipurpose Vehicle Factory. We conclude that green space planning and trees planting are not effective in mitigating negative impact of PM pollution because of inadequate selection of trees and inconsiderate planting composition. We proposed to replace the tree species with the ones capable of reducing the spread of PM, and reorganize planting compositions that consider the directions and characteristics of urban wind flow. This study suggests desirable types of tree species and planting compositions for road, residential and industrial districts, and we expect that it provides helpful guidelines for making planting design and species selection to mitigate the impact of PM in urban landscape.

An Investigation on the Perception of the Effects of Particulate Matter on Oral Health (미세먼지가 구강건강에 미치는 영향에 관한 인식도 조사)

  • Kim, Jue-young;Son, Hwa-kyung
    • The Journal of the Korea Contents Association
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    • v.21 no.6
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    • pp.620-628
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    • 2021
  • This study was conducted to investigate public's perception of the effects of particulate matter (PM) in oral health and to provide specific motivation to prevent oral disease by PM. A total of 134 adults were selected as final analysis subjects from some people all over the country. The data collected is analyzed using SPSS 21.0 for windows. Frequency analysis was used to identify general characteristics and hygiene habit. For identifying perception of effects of PM on oral health, crossover analysis was used. The largest number of people recognized that the level of PM had deteriorated, compared to five years ago. That perception was highest among those in 30 years of age and service professions. Those who check the concentration of PM are more concerned with oral health care when the PM is occurred in high concentration. People who perceive PM as a threat to the oral health are more concerned about oral health care when the PM is occurred in high concentration. It is concerned those who are aware of the relationship between PM and oral health specifically manage the oral health to protect the oral cavity from PM.

A Study on the Research Topics and Trends in South Korea: Focusing on Particulate Matter (토픽모델링을 이용한 국내 미세먼지 연구 분류 및 연구동향 분석)

  • Park, Hyemin;Kim, Taeyong;Kwon, Daewoong;Heo, Junyong;Lee, Juyeon;Yang, Minjune
    • Korean Journal of Remote Sensing
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    • v.38 no.5_3
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    • pp.873-885
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    • 2022
  • The particulate matter (PM) has emerged as a hot topic around the world as it has been reported that PM is related to an increase in mortality and prevalence rates. In South Korea, the importance of PM has been recognized since the late 1990s, and various studies on PM have been conducted. This study investigated the PM research topics and trends for papers (D=2,764) published in Research Information Sharing Service (RISS) using topic modeling based on Latent Dirichlet Allocation (LDA). As a result, a total of 10 topics were identified in the whole papers, and the PM research topics were classified as 'PM reduction (Topic 1)', 'Government policy and management (Topic 2)', 'Characteristics of PM (Topic 3)', 'PM model (Topic 4)', 'Environmental education (Topic 5)', 'Bio (Topic 6)', 'Traffic (Topic 7)', 'Asian dust (Topic 8)', 'Indoor PM (Topic 9)', 'Human risk (Topic 10)'. In particular, the proportion of papers on topics 'Government policy and management (Topic 2)', 'PM model (Topic 4)', 'Environmental education (Topic 5)', and 'Bio (Topic 6)' to the toal number of papers increased over time (linear slope > 0). The results of this study provide the new literature review methodology related to particulate matter and the history and insight.