Introduction:
PM is the abbreviation of Particulate Matter. The 2.5 and 10 behind PM are the values used to indicate the size of particles, generally expressed in microns. 1 micron is equal to 1/1,000,000 of a meter. Refers to the aerodynamic diameter of a particle, an "imaginary" particle size that expresses particle motion.
PM2.5 refers to fine particulate matter. Fine particles are also called fine particles, fine particles, and PM2.5. Fine particulate matter refers to particulate matter with aerodynamic equivalent diameter less than or equal to 2.5 microns in ambient air. It can be suspended in the air for a long time, and the higher its concentration in the air, the more serious the air pollution is.
PM10 refers to inhalable particulate matter. Inhalable particulate matter, usually refers to particles with a particle size below 10 microns, also known as PM10. Respirable particulate matter persists in ambient air for a long time and has a significant impact on human health and atmospheric visibility.
The biggest difference between the two is the source of pollutants: PM2.5 mainly comes from fine particulate matter from combustion sources, including vehicle exhaust, flue gas emissions from power plants and chemical plants, and straw combustion; PM10 mainly comes from motor vehicle dust and construction dust. , other inorganic dust particles, etc.
PM is the abbreviation of Particulate Matter. The 2.5 and 10 behind PM are the values used to indicate the size of particles, generally expressed in microns. 1 micron is equal to 1/1,000,000 of a meter. Refers to the aerodynamic diameter of a particle, an "imaginary" particle size that expresses particle motion.
PM2.5 refers to fine particulate matter. Fine particles are also called fine particles, fine particles, and PM2.5. Fine particulate matter refers to particulate matter with aerodynamic equivalent diameter less than or equal to 2.5 microns in ambient air. It can be suspended in the air for a long time, and the higher its concentration in the air, the more serious the air pollution is.
PM10 refers to inhalable particulate matter. Inhalable particulate matter, usually refers to particles with a particle size below 10 microns, also known as PM10. Respirable particulate matter persists in ambient air for a long time and has a significant impact on human health and atmospheric visibility.
The biggest difference between the two is the source of pollutants: PM2.5 mainly comes from fine particulate matter from combustion sources, including vehicle exhaust, flue gas emissions from power plants and chemical plants, and straw combustion; PM10 mainly comes from motor vehicle dust and construction dust. , other inorganic dust particles, etc.