武汉市地铁生物气溶胶的分布特征

Distribution Characteristics of Bioaerosol in Wuhan Metro

以武汉市地铁系统为研究对象,监测了洪山广场站和江汉路站及途经的地铁1,4,6号线车厢内的生物气溶胶浓度,并分析了影响浓度变化的因素。结果表明,洪山广场站和江汉路站的生物气溶胶浓度为0.16×10^5~25.21×10^5个/m^3,平均浓度为4.76×10^5个/m^3,地铁车厢内的生物气溶胶浓度为0.58×10^5~1.67×10^5个/m^3,平均浓度为0.93×10^5个/m^3。不同时段地铁车站内的生物气溶胶浓度差异显著,且地下站台的生物气溶胶浓度与地面的浓度差异显著,地下不同深度站台的生物气溶胶浓度差异不显著。此外,地铁站的生物气溶胶浓度与人流量、温度、湿度、PM 2.5和PM 10正相关,相关性不显著。

Taking Wuhan metro system as the research object,bioaerosol concentrations in Hongshan Square Station,Jianghan Road Station and the subway carriages of Metro Line 1,4,6 were monitored and the influence factors on concentration changes were analyzed.Results showed that bioaerosol concentrations ranged from 0.16×10^5 to 25.21×10^5/m^ 3 for subway stations,average concentration was 4.76×10^5/m^ 3,the bioaerosol concentration was 0.58×10^5 to 1.67×10^5/m ^3 in subway carriages,with averages concentration 0.93×10^5/m ^3 respectively.Bioaerosol concentrations of subway station at different times were significantly different,bioaerisol concentrations of ground entry were higher than that of underground platform,and bioaerosol levels were positive correlated with PM 2.5 and PM 10,the number of passengers,temperature,relative humidity,and there was no remarkable correlation.