重庆住宅室内真菌气溶胶浓度分布及影响因素

Distribution and influencing factors of fungal aerosol concentration in residential buildings in Chongqing

为了研究重庆地区住宅室内各季节真菌气溶胶的浓度分布和影响因素,在该地选取23户住宅进行了室内外真菌气溶胶浓度检测和温湿度测量。结果表明:在测试期间,夏季、过渡季和冬季室内真菌气溶胶浓度平均值分别为1655.8、1412.8、465.9 cfu/m 3,夏季和过渡季的浓度显著高于冬季;室内真菌气溶胶的峰值粒径、中值粒径均处于第四级(2.10μm,3.30μm),冬季第四级粒径占比最大,中值粒径最小;室内真菌气溶胶浓度与室外浓度、室内温度和相对湿度均呈显著正相关(显著性水平P<0.01),Spearman相关系数分别为0.799、0.533和0.574;全年室内外真菌气溶胶浓度之比(I/O值)平均为1.25,说明室内源>室外源。

In order to study the distribution and influencing factors of fungal aerosol concentration in residential buildings in Chongqing in different seasons,23 residences are selected for indoor and outdoor fungal aerosol concentration detection and temperature and humidity measurement.The results show that during the test period,the average indoor fungal aerosol concentrations in summer,transition season and winter are 1655.8,1412.8,465.9 cfu/m 3,respectively.The concentrations in summer and transition season are significantly higher than that in winter.The peak and count median diameters of indoor fungal aerosol are in the fourth level(2.10μm,3.30μm),the fourth level particle size accounts for the largest proportion and the count median diameter is the smallest in winter.Indoor fungal aerosol concentration is significantly positively correlated with outdoor concentration,indoor temperature and relative humidity,the significance level P is less than 0.01,and the Spearman correlation coefficients are 0.799,0.533 and 0.574,respectively.The average annual I/O ratio is 1.25,which shows that the concentration of indoor sources is higher than that of outdoor sources.