Indoor air quality assessment during seasonal variations in different sites at Jadavpur University, Kolkata

Abstract

In the current study, indoor air quality (IAQ) in six different interior microenvironments of Jadavpur University is evaluated for seasonal and spatial variation from August 2022 to June 2023. Indoor environmental quality (IEQ) variables such as particulate matter (PM10 and PM2.5), formaldehyde( HCHO), carbon dioxide (CO2), were monitored during the monsoon, winter, and summer seasons. It was discovered that the IAQ varied considerably (P< 0.05) between the examined microenvironments. While the greater HCHO levels with above the threshold limit were recorded in the classroom, the highest concentrations of indoor PM10, PM2.5, and CO2 were discovered in AC canteen with concentrations beyond the suggested guidelines values and standards. Additionally, it was discovered that the ventilation rate in the examined workplaces and lecture rooms was lower. Strong seasonal change was evident in the indoor concentrations of PM10, PM2.5(P <0.05). Wintertime levels of PM10 and PM10 HCHO and CO2 were found to be greater. Seasonal and geographic variation in indoor microenvironments was caused by indoor activities, ventilation, and occupancy.