Spatial Concentration of Carbon Components in Indoor PM2.5 of School Classrooms in a Large City of Korea

Heo, Sujeong; Kwoun, Jiyou; Lee, Sumin; Kim, Doyoon; Lee, Tae-Jung; Jo, Youngmin

doi:10.3390/app11167328

Cited by 3 publications

(1 citation statement)

References 21 publications

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“…Thus, the CAI applied to air quality or the AQI of the US EPA is sometimes used as a reference value for evaluation of indoor air quality. However, since the composition of fine dust and exposure intensity vary greatly between indoor and outdoor sources, the impact on human health will also be very different [22]. Accordingly, this study compared the reference concentration levels of the air quality index and the indoor air quality index, in order to determine whether the air quality index can be applied to evaluate indoor air quality.…”

Section: Comparison Of Air Quality Indicesmentioning

confidence: 99%

Air Quality Index through Inverse Evaluation of Hazard Quotient for Public Indoor Facilities - schools, child daycare centers and elderly nursing homes

Kim¹,

Kwoun

Lee

et al. 2022

Environmental Engineering Research

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Indoor air quality indices (IAQI-S, IAQI-C and IAQI-E) were developed to manage air quality in public facilities for vulnerable groups such as schools, child daycare centers, and elderly nursing homes, respectively. In this study, hazard quotient (HQ) was first designated, then the concentrations of each pollutant were calculated by adding the exposure factor of residents. The presented index was more stringent than comprehensive air quality index (CAI) for outdoor atmosphere. Also, composite indices that integrate individual indices for each pollutant were developed for quick and convenient recognition of the current air quality by administration officers or teachers and to take remedial actions. Among all data collected in field measurements, 75.4%, 71.2% and 35.6% were classified as ‘Good’ or ‘Moderate’ in school classrooms, child daycare centers and elderly nursing homes, respectively

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Section: Comparison Of Air Quality Indicesmentioning

confidence: 99%

Air Quality Index through Inverse Evaluation of Hazard Quotient for Public Indoor Facilities - schools, child daycare centers and elderly nursing homes

Kim¹,

Kwoun

Lee

et al. 2022

Environmental Engineering Research

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Could Mild Symptoms Lead to a Critical Diagnosis? Subtle Symptoms of an Aortic Dissection

Önür¹,

Şancı²,

Güllü³

et al. 2022

globecc

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Aortic dissection is defined as separating the layers that make up the aortic wall. Despite advances in diagnosis and treatment methods, the mortality rate is still high [1].Patients with acute aortic dissection typically present with sudden onset, severe, tearing chest pain [2]. The pain may spread to the neck, jaw, and interscapular region. Syncope, stroke clinic, impaired mental activity, hemoptysis, dysphagia, dyspnea, flank pain, abdominal pain, anxiety, and fear of death may accompany the course of the disease [3]. A very small group of patients present with only mild pain. These mild symptoms could be confused with a symptom of musculoskeletal disorders in the chest, groin, or back [4,5]. Thoracic aortic dissection should be considered in the differential diagnosis of all patients presenting with chest pain.

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Identification of Fine Dust in Schools through Comprehensive Chemical Characterization

Kwoun¹,

Kang²,

Lee³

et al. 2022

Asian J. Atmos. Environ

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The objective of this study was to analyze the temporal and spatial characteristics of fine particulate matters by using huge hourly datasets of PM 2.5 , including chemical information monitored at the 6 national intensive monitoring sites (NIMSs) from 2013 to 2018 in Korea. Hourly PM 2.5 raw datasets were obtained from the National Institute of Environmental Research (NIER) in Korea. Monitoring sites included urban, rural/agricultural, industrial, and marine environments. Since the PM 2.5 concentration steadily decreased nationwide, each species concentration also decreased in general. One of key reasons for decreasing PM 2.5 might be explained by the implementation of domestic fine dust reduction policies and external influences such as PM 2.5 concentration reduction in China. It was observed that 45.0% of all datasets for 6 years were classified as good condition. The average sum of 14 elements over all sites in 2018 was calculated to be 501.5 ng/m 3 , and its mass ratio for PM 2.5 (21.9 μg/m 3 ) was 2.30%. The inorganic elements were generally higher in industrial/urban areas than in agricultural areas. In addition, the average TC (total carbon) over all 6 sites was 28.3% of PM 2.5 with the range of 23.6% to 31.4%. The TC in small urban areas was much higher than that in marine areas or even that in large, populated urban area/industrial areas. It seemed that the latter areas were better controlled than the former area in terms of combustion activities of fossil fuels. It is suggested that these results could be play an important role as important basic data to manage ambient air quality and establish effective emission reduction strategies in each region.

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Spatial Concentration of Carbon Components in Indoor PM2.5 of School Classrooms in a Large City of Korea

Cited by 3 publications

References 21 publications

Air Quality Index through Inverse Evaluation of Hazard Quotient for Public Indoor Facilities - schools, child daycare centers and elderly nursing homes

Air Quality Index through Inverse Evaluation of Hazard Quotient for Public Indoor Facilities - schools, child daycare centers and elderly nursing homes

Could Mild Symptoms Lead to a Critical Diagnosis? Subtle Symptoms of an Aortic Dissection

Identification of Fine Dust in Schools through Comprehensive Chemical Characterization

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