بررسی تراکم PM2.5 در هوای داخل و خارج فروشگاه ها در مرکز شهر ساری

Background and purpose: Ëxposure to respirable particles (PM2.5) causes adverse health effects, such as: respiratory and cardiovascular diseases and eventually death. Çonsidering congested traffic flow in the city center of Sari, it could be expected that exposure of citizens to particulate air pollution would be high. The aim of this study was to survey the concentrations of PM2.5 indoor and outdoor of shops and to determine other factors effective upon concentrations of PM2.5 indoor of shops in city center of Sari. Materials and methods: This study was carried out in and outside of 185 non-source shops that were located on 4 main streets in the central part of the city of Sari. Â calibrated real time dust monitor (MicroDust Pro) was used for sampling. Sixty 10-second samples were collected from indoor and outdoor of each shop and relevant information was recorded in a questionnaire. Results: Mean outdoor concentrations of PM2.5 (83.6 µgm-3) were higher than indoor PM2.5 levels (82.2 µgm-3). Çoncentrations of PM2.5 indoor the shops had a significant correlation with the concentration of these particles outdoor. The mean of concentration of PM2.5 was the highest during the high traffic flows in the morning and evening. Â weak but significant correlation was found between indoor concentrations of PM2.5 and other air-pollution-related variables Çonclusion: Results showed that the concentration of PM2.5 particles outdoor the shop is the main cause of their accumulation indoor. Çoncentrations of respirable particles (PM2.5) indoor and outdoor of shops in the city center of Sari were higher than the recommended 24-hour standards.