Selecting Activated Carbon for Adsorption Treatment
The use of activated carbon for adsorption treatment was first recorded more than two hundred years ago.' Carbon adsorption is now commonly employed for product purification (sugar refining, food processing, production of water) and pollution control (water and wastewater treatment, removal of volatile organics). Because activated carbon has a very large specific area (up to more than 2000 m2/& It is a powerful adsorbent, capable of adsorbing most organic impurities and/or contaminants. The criteria for determining whether to use carbon treatment is often the cost of the adsorption process relative to alternative treatment processes, such as ion-exchange, oxidation, biodegradation, which can accomplish the same treatment objectives. The most important cost factor in applying adsorption treatment is the carbon exhaustion rate or the amount of carbon required to treat a given quantity of feed.'.'