Air Pollution Particles in the air
Air Pollution- Particles in the Air
Air quality and particles · Epidemiological(流行病学) evidence associates atmospheric particles with diseases and mortality Particles penetrate the lungs, blocking and irritating air passages. Particles themselves could exert toxic effects. (toxic substances present in the particles) [polycyclic Aromatic Hydrocarbons are examples of toxic substances in aerosols
Air quality and particles • Epidemiological (流行病学) evidence associates atmospheric particles with diseases and mortality. – Particles penetrate the lungs, blocking and irritating air passages. – Particles themselves could exert toxic effects. (toxic substances present in the particles) [Polycyclic Aromatic Hydrocarbons are examples of toxic substances in aerosols.]
Gullet or esophagus Larynx Windpipe or trachea Body wal 尽 Pleura covering Pleural cavi Space occupied Left lung Cut op Anatomy of the human respiratory system
The larger a particle is, the 090 more likely it is 0.80 deposited into z9-0z2 NASAL-P the upper part of the respiratory 0.60-额 Pulmonary system 0.50 F040 The smaller a Oau particle is, the 03 deeper it can get · BRONCHIAL into the respiratory ystem 051. 501oo MASS MEDIAN DIAMETER (um) Particle deposition as a function of particle diameters in various regions of the lung
Particle deposition as a function of particle diameters in various regions of the lung. The larger a particle is, the more likely it is deposited into the upper part of the respiratory system. The smaller a particle is, the deeper it can get into the respiratory system
Terms TSP: Total suspended particulate matter RSP: Respirable suspended particulate matter PM10: Particulate matter of less than 10 um equivalent to RSP. PM25: Particulate matter of less than 25 um
Terms • TSP: Total suspended particulate matter • RSP: Respirable suspended particulate matter • PM10: Particulate matter of less than 10 um; equivalent to RSP. • PM2.5: Particulate matter of less than 2.5 um