"Carbonaceous material, especially charcoal, activated by heat at high temperature, or otherwise treated to increase its porosity and adsorptive power. Activated carbon is used in removal of pollutants from gas and liquids and in other purification processes."@en . "2013-11-18T12:30:55"^^ . . "activated carbon"@en . "activated charcoal"@en . "300380477" . . "carbon, activated"@en . "2013-03-20T17:43:13"^^ . .