Characteristics of Indoor Air Pollutant Concentrations and Indoor-Outdoor Differences at a University Dormitory in Nanjing
This study took typical dormitories of a university in Nanjing as the research object.Basing on the synchronous monitoring of four widely concerned pollutants(CH2O,O3,PM2.5 and PM10)inside and outside the dormitories in different seasons and ventilation scenarios,the indoor air quality was assessed,and differences between the indoor and outdoor and influencing factors were discussed.The results showed that the hourly concentration of CH2O exceeded the standard significantly,by 1.6 times for the maximum value.The concentrations of CH2O and O3 were remarkably higher in summer than in winter,while it was opposite for PM10 and PM2.5.The concentrations of indoor CH2O and O3 were significantly higher and lower than that of outdoor,indicating CH2O is mainly originated from indoor sources,while O3 is from outdoor.The differences of PM2.5 and PM10 concentrations between indoor and outdoor were relatively small,indicating they were affected by both indoor and outdoor sources.Window ventilation can significantly reduce indoor CH2O concentration,but may lead to an increase in O3,and the effect on particulate matters is associated with the relative strength of indoor and outdoor sources.
Indoor air pollutionFormaldehydeOzoneParticulate matter
NETL
NSTL
万方数据
