Source identification of PM_(10) pollution in subway

摘要

In urban areas, subway system is the most efficient and convenient mode of commuter transportation. In Seoul, the subway system is a major form of transportation and accounts for ～36.2% of the total transportation in the city. Seoul is served by nine subway lines with a total of 358 stations and transports 6.7 million passengers daily. Subway passengers and workers can develop air pollution problems because the subway system is typically a confined space exposed to pollution from various sources. The health of subway passengers and employees is of great concern considering the potentially high levels of air pollution combined with prolonged exposure times.