Air Pollution in Semi-enclosed Large-scale Comprehensive Passenger Transport Hubs

Objectives To investigate the concentration and distribution characteristics of pollutants in large-scale comprehensive passenger transport hubs.

Methods Detecting the concentration of carbon monoxide (CO), non-methane hydrocarbon (NMHC), nitrogen oxides (NOx), sulfur dioxide (SO₂) and particulate matter (PM₁₀) at different monitoring sites inside and outside of hubs during different seasons.

Results The pollutants exhausted from automobile in hubs were higher than those in the open-air sites outside of hubs, especially during winter, summer and rush hours. The major pollutant in hubs was nitrogen oxides; and its average concentration was 1.71±1.07 mg/m³.

Conclusions The current situation of air pollution in semi-enclosed large-scale comprehensive passenger transport hubs could not be ignored; developing relevant standards to protect human health should be as early as possible.