The Microbial Activity in PM2.5 in Indoor Air: As an Index of Air Quality Level

Bioaerosols are a major source of pollution in indoor environments, where people spend approximately 90% their time, and the microorganisms adhered to PM2.5 adversely affect human health. However, most research has focused on concentration these aerosols factors that influence it rather than correlation between microbial activity air quality. Thus, this study used modified technique fluorescein diacetate (FDA) hydrolysis evaluate during three seasons (summer, autumn winter) Beijing. 0.155–5.388 ng m–3 0.091–5.740 sodium fluorescein, marker activity, were measured indoors outdoors, respectively; thus, no significant difference two environments was detected, but affected by outdoor conditions an extent. The active season autumn, followed winter summer. Furthermore, highest summer observed excellent quality, summer, good quality also obviously exceeded slight pollution. Additionally, room varied according room’s ventilation (or lack thereof), suggesting strong association parameters. In general, when excellent, 20 minutes achieved optimal exchange, duration should be reduced polluted conditions. Our results provide new insights into evaluating based activity.