particulate matters deposition in the human respiratory system: a health risk assessment at a technical university

Introduction: this study quantified particulate matter (pm) deposition and its clearance in the human respiratory tract (hrt) at different microenvironments of a university. the university is located adjacent to the national highway (nh 334) and main bus stop of the city, thus highly affected by pm pollution. materials and methods: the deposition calculations were performed using a widely accepted mppd 3.04 model. three seasons (summer, winter and monsoon), seven microenvironments (including three lecture hall complexes (lhcs), a library, two laboratories and outdoor), and different activity patterns associated with each microenvironment were considered. results: the deposited mass of coarse fraction (pm2.5-10) in different hrt regions follows the order: pulmonary (0.5%)