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http://dx.doi.org/10.5668/JEHS.2020.46.5.504

Indoor to Outdoor Ratio of Fine Particulate Matter by Time of the Day in House According to Time-activity Patterns  

Park, Jinhyeon (Department of Occupational Health, Daegu Catholic University)
Kim, Eunchae (Department of Occupational Health, Daegu Catholic University)
Choe, Youngtae (Department of Occupational Health, Daegu Catholic University)
Ryu, Hyoensu (Department of Occupational Health, Daegu Catholic University)
Kim, Sunshin (Department of Occupational Health, Daegu Catholic University)
Woo, Byung Lyul (Department of Occupational Health, Daegu Catholic University)
Cho, Mansu (Department of Occupational Health, Daegu Catholic University)
Yang, Wonho (Department of Occupational Health, Daegu Catholic University)
Publication Information
Journal of Environmental Health Sciences / v.46, no.5, 2020 , pp. 504-512 More about this Journal
Abstract
Objective: The purpose of this study was to evaluate the indoor to outdoor ratio (I/O ratio) of time activity patterns affecting PM2.5 concentrations in homes in Korea through a simulation. Methods: The time activity patterns of homemakers were analyzed based on the 'Time-Use Survey' data of the National Statistical Office in 2014. From September 30 to October 2, 2019, the experimenter lived in multifamily housing located in Guro-gu, Seoul. The I/O ratio of PM2.5 concentration was measured by installing sensor-based instruments. Results: The average indoor and outdoor PM2.5 concentrations during the three days were 33.1±48.9 and 45.9±25.3 ㎍/㎥, respectively. The average I/O ratio was 0.75±0.60. The indoor concentration tended to increase when PM2.5 source activity such cooking and cleaning was present and outdoor PM2.5 was supplied through ventilation. Conclusions: This study could be used as basic data for estimating indoor PM2.5 concentrations with personal activity pattern and weather conditions using outdoor concentrations.
Keywords
Fine particulate matter; indoor air quality; indoor to outdoor ratio; time-activity pattern;
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