Nationwide distribution and factors related to indoor fine particulate matter concentrations in subway stations in Korea: Results of first-year measurement
Year: 2024
Type: article
Abstract: • We assessed PM 2.5 concentrations over one year using the beta-ray absorption method at 642 underground subway station across Korea. • PM 2.5 levels were higher in the Seoul metropolitan area than non-Seoul metropolitan area and both peaked in winter. • In Seoul metropolitan area, indoor PM 2.5 were associated with the operation year, number of air cleaners on platforms, and number of passengers. • Our results can inform strategies to manage indoor PM 2.5 in subway stations. This study assessed the seasonal distribution and factors associated with PM 2.5 in nationwide subway stations in Korea. A total of 229,644 data points collected over one year were used to determine one-day PM 2.5 concentrations from 642 subway stations. The geometric mean of indoor PM 2.5 concentrations was 26.6 µg/m 3 . PM 2.5 concentrations were higher in the Seoul metropolitan area (SMA) compared to non-Seoul metropolitan areas (NSMA), with the highest level occurring in winter, followed by spring, fall, and summer, similar to the trend observed for outdoor PM 2.5 concentrations. In SMA, PM 2.5 concentrations were significantly associated with the operation year, number of air cleaners on platforms, and number of passengers. These findings may help in the development of national strategies for managing indoor PM 2.5 concentrations in subway stations, taking into account spatial and temporal factors.
Source: Environment International
Institution: National Institute of Environmental Research
Language: English
Subfield: Health, Toxicology and Mutagenesis
Field: Environmental Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,980
Award: G4211939949
OpenAlex ID: W4403561193