Activated carbon is a porous material that removes impurities from liquids and gases. The surface area of the activated carbon is 1200 to 1500m2/g. Activated carbon can be used in food processing industry, water treatment, and air treatment.
There are 2 methods of adsorption: physisorption and chemisorption. Physisorption occurs when, as a result of energy differences and electrical attractive forces (Van der Waals Forces), the adsorbate molecules become physically fastened to the adsorbent molecules. Chemisorption occurs by the reaction between the function group of activated carbon and adsorbate molecule.