Study on the levels of indoor particulate matters and influencing factors in functional areas of a city
Objective To understand the levels of indoor particulate matters and influencing factors in functional areas of a city,and to provide scientific basis for improving indoor air quality.Methods The indoor air quality of 30 residential buildings was detected in business area and industrial area of a city in heating season and non-heating season of 2020.The detection indexes included PM2.5,PM10,temperature and relative humidity.The residential characteristics were investigated by questionnaire.Results The medians of PM25 concentration,PM 10 concentration,temperature and relative humidity were 128.9μg/m3,155.4 μg/m3,22 ℃ and 43％in business area,respectively;while were 141.1 μg/m3,160.4 μg/m3,21 ℃ and 51％,in industrial area,respectively.There were no significant differences in median levels of the above 4 indexes between the two functional areas.Compared with non-heating season,the levels of PM25 concentration and PM10 concentration of heating season were all higher in both business area and industrial area(Z values:-6.716,-6.550,-6.430,-6.462,P＜0.05);while were lower for temperature and relative humidity(Z values:-2.691,-7.577,-5.831,-8.603,P＜0.05).Logistic regression analysis showed that the risk factors of PM2.5 concentration and PM10 concentration were the frequency of mopping or dust collection and the frequency of window opening ventilation in non-heating season.Spearman correlation analysis showed that indoor temperature and relative humidity were negatively correlated with PM2.5 concentration and PM10 concentration in non-heating period.Conclusion There maybe indoor particulate matters pollution in functional areas of a city,especial in heating season.The levels of indoor particulate matters may be influenced by frequency of dust collection,ventilation frequency,temperature and relative humidity.
Indoor air qualityParticulate mattersResidential characteristicsTemperatureRelative humidityFunctional areas
万方数据
维普
