南京某幼儿园室内外细颗粒物（PM2.5）质量浓度调查及影响因素分析
Analysis of indoor and outdoor PM2.5 mass concentration and influencing factors of a kindergarten in Nanjing
摘要：
于2015年4—12月（除7，8月外，每月一周）实测了该幼儿园室内外PM2.5浓度，结果显示：室外PM2.5质量浓度中位值为60.6 μg/m3，室内PM2.5质量浓度中位值为32.5 μg/m3；室内外PM2.5浓度相关系数达0.74，检测期间平均约有52%的室外PM2.5通过建筑围护结构进入室内，室内55%的PM2.5变化由室外颗粒物源导致；实测期间，时均I/O值为0.69，变化范围为0.1~5.46；I/O值受室外PM2.5质量浓度的影响，随室外PM2.5质量浓度升高呈下降趋势，室外PM2.5浓度较高时，I/O值随换气次数减小而减小，室外PM2.5浓度较低时，I/O值随换气次数减小而增大；室外空气湿度与室内外PM2.5浓度正相关，室外风速与室内外PM2.5浓度负相关，而室外温度对室内外PM2.5浓度影响有限，但与I/O值正相关。
Abstract：
Measures the mass concentration of indoor and outdoor PM2.5 of a kindergarten during April 2015 to December 2015 (one week per month, excluding July and August). The results show that the outdoor and indoor median PM2.5 mass concentrations are 60.6 μg/m3 and 32.5 μg/m3, respectively. The correlation coefficient between indoor and outdoor PM2.5 reaches 0.74, 52% of the outdoor PM2.5 enters into the interior through the building envelope during the measurement period, and 55% of the indoor PM2.5 concentration variation is caused by outdoor particle source. The mean value of hourly I/O is 0.69, and the range is 0.1~5.46. The I/O value is influenced by outdoor PM2.5 mass concentration, it decreases with an increase of outdoor PM2.5 mass concentration, when outdoor PM2.5 concentration is high, I/O decreases with air change rate decreasing and vice versa, the outdoor relative humidity has a positive correlation with varying pattern of indoor and outdoor PM2.5 mass concentration, the wind speed has a negative correlation with indoor and outdoor PM2.5 concentration, and the outdoor air temperature is not significantly correlated with indoor and outdoor PM2.5 but is positively correlated with I/O.
Keywords:Nanjing, kindergarten, indoor and outdoor PM2.5, envelope, meteorological factor