Abstract:
The use of portable monitoring equipment to detect the subway station's and interior air quality of Kunming was collected and applied in July 2014,air of arsine (AsH3),ammonia (NH3),total volatile organic compounds (TVOCs),nitric oxide (NO),nitrogen dioxide (NO2) were detected and analyzed.① In the comparison of the concentration of gaseous pollutants in the elevated platform (Dounan station) and the underground platform (Oriental Plaza station).The mass concentrations of AsH3,NH3,NO and NO2 in the elevated platform were (117.251.34),(53.937.30),(395.665.13),(89.7717.82)gm-3,and the volume concentration of TVOCs was (63.593.61)10-9.The concentration of five kinds of gaseous pollutants on the platform is (117.251.34),(119.633.06),(398.204.62),(54.232.54)gm-3 and (103.393.88)10-9.The concentration of AsH3,NH3 and TVOCs in the elevated platform is higher than that in the underground platform,and the concentration elevation platform is lower than that of the underground platform.②In the comparison of the concentration of gaseous pollutants in the platform and the subway inside.The mass concentrations of AsH3,NH3,NO and NO2 in the platform were (116.271.19),(106.925.50),(397.713.83),(61.114.58)gm-3,and the volume concentration of TVOCs was (95.684.29)10-9.The concentration of five kinds of gaseous pollutants in the subway inside were (119.631.22),(120.532.97),(384.532.71),(78.833.36)gm-3 and (113.834.08)10-9.Where the site of AsH3,NH3,TVOCs concentrations were significantly lower than the concentration of the inside,and NOx similar.③In the monitoring of 31 stations,it was found that AsH3 had the same level of concentration in 31 stations,and Dongfeng square station was the highest,which was 126.81gm-3.The mass concentration of NH3 and the volume concentration of TVOCs was the highest in the South Ring Road station,which was 145.26gm-3 and 155.7310-9.The mass concentration of NOx in the South Coach station has the highest distribution of 382.61gm-3 and 158.21gm-3.In this study,it has been found that the change of AsH3,NH3 and TVOCs is mainly influenced by the passenger flow.The change of NO and NO2 concentration is mainly affected by the emission of ground vehicle.