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Activated charcoal is a type of powder made by exposing some materials to extremely high temperatures in an airless environment. The resultant charcoal is then activated or treated to form the final product – activated charcoal. It is usually very fine, tasteless and odorless. Some of the materials used to make it include coconut shells and some types of wood. Activated charcoal is, in fact, a special type of carbon, which explains why it is also known as activated carbon. Powdered activated carbons are generally used in batch process as the amount added can be easily altered and powder can be easily removed. The wet powder cake is not regenerated because of the problems associated with recycling the carbon, but incinerated or placed in landfills