EMST Flashcards
1 (19 cards)
Air Pollution
Presence in the air of organic and inorganic substances whose quality, concentration and duration affects the usefulness of our air resources.
Ambient Standard
Quality standard set for ambient air
Emission Standard
Standard set for the sources of wastes
Duration
Period at which air pollutants will be present in the atmosphere.
Particulates
any substance that exist as solid or liquid in the atmosphere
Gases
Molecular in size
Dust
solid aerosol in the micron size range (1 micron – 300 microns)
Fume
solid aerosol in submicron size range ( 0.001 micron – 1 micron)
Mist
a form of liquid aerosol (0.01 – 10 microns)
Spray
higher concentration, visible to the human eye ( 10 microns – 3 mm)
Smoke
combination of gas and solid particulates from fuel combustion.
Fog
high concentration mist sufficient to reduce visibility.
Smog
Smoke and fog
Carbon monoxide
(CO) is a colorless, odorless, and tasteless gas that is slightly less dense than air.
Carbon dioxide(chemical formula CO2)
is a naturally-occurring chemical compound composed of 2 oxygen atoms eachcovalently double bonded to a single carbon atom.
Sulfur dioxide
is thechemical compoundwith the formulaSO 2. Atstandard atmosphere, it is a toxic gas with a pungent, irritating, and rotten smell.
Photochemical smog
is a unique type of airpollution which is caused by reactions between sunlight and pollutants likehydrocarbons and nitrogen dioxide.
NO2
is a generic term for the various nitrogen oxides produced during combustion.
chlorofluorocarbon (CFC)
is anorganic compound that contains onlycarbon, chlorine, and fluorine, produced as avolatile derivative ofmethane, ethane andpropane.
