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Open AccessArticle

Study on Characteristics of Particulate Matter Resuspension in School Classroom through Experiments Using a Simulation Chamber: Influence of Humidity

by 1,2,†, 1,2,†, 1 and 1,*
1
Transportation Environmental Research Team, Korea Railroad Research Institute, Uiwang 16105, Korea
2
Department of Environmental Science and Engineering, Kyung Hee University, Yongin 17104, Korea
*
Author to whom correspondence should be addressed.
These authors contributed equally to this paper.
Academic Editors: Gianluigi de Gennaro, Jolanda Palmisani and Alessia Di Gilio
Int. J. Environ. Res. Public Health 2021, 18(6), 2856; https://doi.org/10.3390/ijerph18062856
Received: 18 January 2021 / Revised: 7 March 2021 / Accepted: 8 March 2021 / Published: 11 March 2021
(This article belongs to the Special Issue Outdoor and Indoor Air Quality)
Resuspension of particulate matter (PM) in classrooms, which increases the risk of negative impact on student health from exposure to PM, is influenced by humidity level in the indoor environment. The goal of this study is to investigate the properties of PM resuspension in accordance with relative humidity through classroom test chamber experiments. In actual classrooms, it is challenging to control factors influencing resuspension. Therefore, the classroom chamber that reflects the environment of elementary school classroom (e.g., structure, floor material) is used in this study. The humidity of the classroom chamber is adjusted to 35%, 55%, 75%, and 85% by placing it inside a real-size environmental chamber, which allows artificial control of climatic conditions. At the respective humidity conditions, PM resuspension concentration and resuspension factor caused by occupant walking across the classroom chamber are analyzed. The results show that both of the resuspension concentration and resuspension factor reveal a linear negative correlation to humidity increase. Furthermore, coefficient of determination (R2) indicating goodness-of-fit of the linear regression model between the resuspension concentration and humidity is 0.88 for PM10 and 0.93 for PM2.5. It implies that accuracy of the regression model for estimating PM10 and PM2.5 resuspension concentrations is 88% and 93%, respectively. View Full-Text
Keywords: particulate matter; resuspension; relative humidity; resuspension factor; occupants’ activity; classroom particulate matter; resuspension; relative humidity; resuspension factor; occupants’ activity; classroom
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MDPI and ACS Style

Cho, S.; Lee, G.; Park, D.; Kim, M. Study on Characteristics of Particulate Matter Resuspension in School Classroom through Experiments Using a Simulation Chamber: Influence of Humidity. Int. J. Environ. Res. Public Health 2021, 18, 2856. https://doi.org/10.3390/ijerph18062856

AMA Style

Cho S, Lee G, Park D, Kim M. Study on Characteristics of Particulate Matter Resuspension in School Classroom through Experiments Using a Simulation Chamber: Influence of Humidity. International Journal of Environmental Research and Public Health. 2021; 18(6):2856. https://doi.org/10.3390/ijerph18062856

Chicago/Turabian Style

Cho, Sunghee; Lee, Gahye; Park, Duckshin; Kim, Minjeong. 2021. "Study on Characteristics of Particulate Matter Resuspension in School Classroom through Experiments Using a Simulation Chamber: Influence of Humidity" Int. J. Environ. Res. Public Health 18, no. 6: 2856. https://doi.org/10.3390/ijerph18062856

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