Abstract
The air quality in subway station offices can greatly affect the health and comfort of metro staff. We characterized the air pollution in the offices of six subway stations by measuring the concentrations and composition of airborne fine particulate matter and volatile organic compounds in both summer and winter. We compared the findings by season, ventilation system type, platform screen door design, and station age. Concentrations of metals in airborne particulate matter were higher in metro station offices than in reference ambient air, with iron, manganese, and copper greatly exceeding their concentrations in ambient air. The concentrations of total volatile organic compounds exceeded national standard limits and ranged from 1027.63 to 1801.83 μg/m3. Operating the mechanical ventilation system in full fresh-air mode rather than primary air return mode reduced the concentrations of volatile organic compounds. These findings provide an assessment of pollutant characteristics in metro station offices and may be useful in formulating prevention and mitigation strategies for indoor air quality management.
Published Version
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