Air purification technologies

Abstract

Air pollution control includes all measures taken to avoid or reduce the release into the atmosphere of any potentially harmful substances caused by human activity. Emissions are attributed to specific sources. Technical facilities such as furnaces, power plants or stationary engines, which emit via stovepipes, smoke stacks, or tailpipes, are known as point sources. These can easily be analysed, quantified and controlled using standardised measurement techniques. Mobile sources of emission such as ships, cars, and trucks are known as line sources. In contrast, fugitive emissions from stockpiles, dumps or tips caused by wind erosion and dispersing dust are defined as area sources and are difficult to control. Fugitive emissions are also produced by ventilation through doors, windows, and the ridge turrets of halls.