Review of Important PM2.5 Source Categories

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Presentation transcript:

Review of Important PM2.5 Source Categories Combustion a, b Open Burning (all types) Non-Road & On-Road Mobile Residential Wood Burning Wildfires Power Gen Boilers (Oil, Gas, Coal) Boilers (Wood) Crustal / Metals b Fugitive Dust Mineral Prod Ind Ferrous Metals SO2 c Power Gen (Coal) Boilers (Coal) Power Gen (Oil) Boilers (Oil) Industrial Processes NOx On-Road Mobile (Gas, Diesel) Non-Road Mobile (Diesel) Boilers (Gas, Coal) Residential (Gas, Oil) NH3 On-Road Mobile Animal Husbandry Fertilizer Application Wastewater Treatment Boilers VOC d Biogenics Solvent use On-Road (Gas) Storage and Transport Residential Wood Petrochemical Industry Waste Disposal DIRECT EMISSIONS a Includes primary organic particles, elemental carbon and condensible organic particles; also some flyash Impact of carbonaceous emissions on ambient PM 5 to 10 times more than crustal emissions impact Includes SO 2 , and SO 3 and H SO 4 condensible inorganics Contributes to formation of secondary organic aerosols PRECURSOR EMISSIONS NOTE: Categories in BOLD are most important nationally. Their relative importance varies among and between urban and rural areas. This chart summarizes the larger source categories of PM2.5 direct and precursor emissions.