Pollution & sustainability
Air Pollution Control
5 self-contained study topics — notes, diagrams, formulas, and worked examples for exams and GATE.
Topics
- Sources of Air PollutionAir-pollution source analysis identifies where pollutants originate and how much each source contributes to ambient burden. It is the first step in planning effective control strategies.
- Atmospheric DispersionAtmospheric dispersion estimates how emitted pollutants spread and dilute in air under varying meteorological conditions. Gaussian plume models remain a core analytical tool for stack-impact calculations.
- Particulate Control DevicesParticulate-control devices remove suspended solids from industrial gas streams using electrical, inertial, or filtration mechanisms. Device selection depends on particle size, gas temperature, and required outlet standards.
- Gaseous Pollutant ControlGaseous-pollutant control targets acid gases, VOCs, and NOx through transfer, reaction, or catalytic conversion mechanisms. Proper technology choice depends on pollutant chemistry and concentration range.
- Ambient Air Quality StandardsAmbient-air standards define permissible pollutant concentrations for protecting public health over specific averaging periods. Compliance tracking uses monitored values, exceedance counts, and index-based communication tools like AQI.