Air Quality

1 mg/L

diameter less than 10 microns (um)

1 mg/m^3 air

stability of the atm

unstable/super adiabatic

gas-phase

National Ambient Air Quality Standards (NAAQS), hazardous air pollutant stds (NESHAPs), and standards for vehicles to reduce harmful emissions

regulated ozone depletion, control technologies, leaded fuel ban, and force non-attainment with fines

absorption, adsorption, and combustion

spray chambers, scrubbers, towers, and packed columns

packed adsorbent towers

afterburners and catalytic converters

absorption goes from gas phase to liquid phase and absorption goes from gas phase to solid phase

contaminant gas is oxidized to an inert gas

methane, carbon monoxide, and hydrocarbons

direct flame combustion and catalytic combustion

sedimentation, impaction/cyclones, filtration, liquid scrubbing, and electrostatic precipitation

removal of particles large enough to settle under force of gravity (settling chamber)

centrifugal force causes particles to impact surface

chemical and physical

it combines the soption process of spray chamber with impaction force of cyclone

wet, corrosive, or hot

current is applied between wires and plates and the ion field creates negatively charged particles that migrate to the positively charged plate

remove fly ash from fossil fuel furnaces

3.76

neutral

PM that has not passed through a stack before being released to the air

air pollutants that are particulates (not gases)

ppm * MW/24.45