Primary Air Pollutants Five major materials released directly into the atmosphere in unmodified forms Secondary air pollutants form under reaction of primary pollutants and water or sunlight
Primary Air Pollutants • Five major materials released directly into the atmosphere in unmodified forms. – Secondary air pollutants form under reaction of primary pollutants and water or sunlight
Primary Air Pollutants Carbon Monoxide- Produced when organic materials are incompletely burned Single largest source is the automobile Not a persistent pollutant Hydrocarbons Nitrogen Oxides
Primary Air Pollutants • Carbon Monoxide - Produced when organic materials are incompletely burned. – Single largest source is the automobile. – Not a persistent pollutant. Hydrocarbons Nitrogen Oxides
Primary Air Pollutants Hydrocarbons-Group of organic compounds consisting of carbon and hydrogen Evaporated from automobile fuel or remnants of fuel incompletely burned Catalytic converters used to burn exhaust gases more completely
Primary Air Pollutants • Hydrocarbons - Group of organic compounds consisting of carbon and hydrogen. – Evaporated from automobile fuel or remnants of fuel incompletely burned. Catalytic converters used to burn exhaust gases more completely
Primary Air Pollutants Particulates- Minute pieces of solid materials dispersed into the atmosphere(<10 microns) Smoke. Asbestos. Dust Ash Can accumulate in lungs and interfere with the ability of lungs to exchange gases Sulfur Dioxide(So2)- Sulfur and oxygen compound produced when sulfur-containing fossil fuels are burned Burning coal releases sulfur dioxide
Primary Air Pollutants • Particulates – Minute pieces of solid materials dispersed into the atmosphere (<10 microns). – Smoke, Asbestos, Dust, Ash – Can accumulate in lungs and interfere with the ability of lungs to exchange gases. • Sulfur Dioxide (SO 2 ) – Sulfur and oxygen compound produced when sulfur-containing fossil fuels are burned. – Burning coal releases sulfur dioxide
Primary Air Pollutants Nitrogen Oxides(NO, No2)-Formed when combustion takes place in the e aIr N and o molecules from the air may react with one another
Primary Air Pollutants • Nitrogen Oxides (NO, NO 2 ) - Formed when combustion takes place in the air. – N and O molecules from the air may react with one another