Estimation of inhaled airborne particle number concentration by subway users in Seoul, Korea

Kim, Minhae; Park, Sechan; Namgung, Hyeong-Gyu; Kwon, Soon-Bark

doi:10.1016/j.envpol.2017.08.077

Cited by 14 publications

(5 citation statements)

References 21 publications

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“…Elevated exposure to airborne particles during dental procedures is also reported in Polednik et al 51 where inhalation of particles>1 μm was found higher (21.7 million particles/h) than the estimates presented herein (3.6 and 3.08 million particles/h during grinding/drilling and polishing, respectively). On the other hand, for submicron particles our estimates are substantially higher since airborne particles were measured from 10 nm (5136 million particles/h herein vs. 84.7 million particles/h in Polednik et al 51 ) Our results also suggest that inhalation of submicron particles during dental procedures (86 million particles/min) are considerably lower than that inside a subway-approximately 194 million particles/min on the platform-, 68 but comparable when looking at supermicron particles.…”

Section: Color Keycontrasting

confidence: 45%

“…subway-approximately 194 million particles/min on the platform-,68 but comparable when looking at supermicron particles.Specifically, the authors report an inhalation rate of 71 thousand particles/min on the platform while in the present study the inhalation rate of supermicron particles was 60 and 52 thousand particles/ min during grinding/drilling and polishing, respectively. Origins of particulate sources are entirely different in a subway, nevertheless,…”

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confidence: 89%

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Airborne particles and microorganisms in a dental clinic: Variability of indoor concentrations, impact of dental procedures, and personal exposure during everyday practice

et al. 2021

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Studying air quality in healthcare facilities comprises of identification of the contaminant sources, their dispersion, and impact on indoor air. 1,2 Considering as ultimate purpose pathogen mitigation, minimization of the acquired infections both for the patients and the personnel is a challenging issue, 3,4 not only because of the direct contact with the contaminant sources but also due to their great variability in their characteristics and properties.Airborne particulate contaminants consist mainly of aerosols and/or particles of biological matter, that is, bioaerosols. Airborne aerosol properties vary considerably depending on their size and chemical/biological composition. 5 In turn, their size and composition are governed by their origin (natural environment, anthropogenic

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Section: Color Keycontrasting

confidence: 45%

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confidence: 89%

Airborne particles and microorganisms in a dental clinic: Variability of indoor concentrations, impact of dental procedures, and personal exposure during everyday practice

et al. 2021

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“…For the people with the same susceptibility and exposure time, exposure doses are mainly dependent on particle sizes and concentrations [83]. Furthermore, PMs may combine with other air pollutants and generate secondary pollutants, such as nitrogen oxides [143]. PMs' concentration presents spatiotemporal characteristics in subways.…”

Section: Pmsmentioning

confidence: 99%

Environmental and Health Effects of Ventilation in Subway Stations: A Literature Review

Wen

Leng

Shen

et al. 2020

IJERPH

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Environmental health in subway stations, a typical type of urban underground space, is becoming increasingly important. Ventilation is the principal measure for optimizing the complex physical environment in a subway station. This paper narratively reviews the environmental and health effects of subway ventilation and discusses the relevant engineering, environmental, and medical aspects in combination. Ventilation exerts a notable dual effect on environmental health in a subway station. On the one hand, ventilation controls temperature, humidity, and indoor air quality to ensure human comfort and health. On the other hand, ventilation also carries the potential risks of spreading air pollutants or fire smoke through the complex wind environment as well as produces continuous noise. Assessment and management of health risks associated with subway ventilation is essential to attain a healthy subway environment. This, however, requires exposure, threshold data, and thereby necessitates more research into long-term effects, and toxicity as well as epidemiological studies. Additionally, more research is needed to further examine the design and maintenance of ventilation systems. An understanding of the pathogenic mechanisms and aerodynamic characteristics of various pollutants can help formulate ventilation strategies to reduce pollutant concentrations. Moreover, current comprehensive underground space development affords a possibility for creating flexible spaces that optimize ventilation efficiency, acoustic comfort, and space perception.

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“…Excessive exposure to elevated PM 2.5 1 concentrations may contribute to cardiovascular and respiratory diseases and even death. 6 Significant concentrations of PM 2.5 and CO 2 have been found in station halls, platforms and train carriages, 7,8 where fresh air is limited. Pollution in train carriages, and its effect on health, should be of worldwide concern.…”

Section: Introductionmentioning

confidence: 99%

The distribution and influential factors of PM_2.5 and CO₂ in urban rail carriages

Gao

Chen

Wang

2019

Indoor and Built Environment

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The promotion of 'Green Transport' has increased the importance of urban rail transit in China. Increased passenger flow and longer travel time have led to increased attention to in-carriage air quality in trains. In this study, CO 2 and PM 2.5 monitoring were conducted in subway train carriages in a city in northern China. The study accounts for a variety of factors both inside and outside of the train carriages, such as passenger volume and exterior environment. The results reveal that good air quality outside of the train, an above ground location and the use of platform screen doors could aid in the attainment of acceptable PM 2.5 concentrations. In addition, linear models of CO 2 and PM 2.5 concentrations were established based on passenger density. The nonlinear recursive models were constructed using time-series analysis to reflect the cumulative effects of the amounts of CO 2 and PM 2.5. The spatial and temporal distributions show that, given a constant passenger density, the PM 2.5 concentration is higher near the door area than in the seating area. CO 2 concentrations varied in three stages, consistent with the change of local passenger load. Finally, a real-time optimized control method for fresh air volume and some suggestions are proposed to improve the in-carriage air quality of subway trains.

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Estimation of inhaled airborne particle number concentration by subway users in Seoul, Korea

Cited by 14 publications

References 21 publications

Airborne particles and microorganisms in a dental clinic: Variability of indoor concentrations, impact of dental procedures, and personal exposure during everyday practice

Airborne particles and microorganisms in a dental clinic: Variability of indoor concentrations, impact of dental procedures, and personal exposure during everyday practice

Environmental and Health Effects of Ventilation in Subway Stations: A Literature Review

The distribution and influential factors of PM_2.5 and CO₂ in urban rail carriages

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Estimation of inhaled airborne particle number concentration by subway users in Seoul, Korea

Cited by 14 publications

References 21 publications

Airborne particles and microorganisms in a dental clinic: Variability of indoor concentrations, impact of dental procedures, and personal exposure during everyday practice

Airborne particles and microorganisms in a dental clinic: Variability of indoor concentrations, impact of dental procedures, and personal exposure during everyday practice

Environmental and Health Effects of Ventilation in Subway Stations: A Literature Review

The distribution and influential factors of PM2.5 and CO2 in urban rail carriages

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The distribution and influential factors of PM_2.5 and CO₂ in urban rail carriages