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Active carbon

No change in size, 19:19, 21 May 2012

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[[Image:activated_carbon_bags.jpg|thumb|right|~~250px~~300px|Activated carbon bags for sale and use in water treatment systems. Photo: [http://www.alibaba.com/product-gs/246397546/activated_carbon_for_water_treatment.html Alibaba.com.]]]

Activated carbon is produced by the controlled thermalization of carbonaceous material, normally wood, coal, coconut shells or peat. This activation produces a porous material with a large surface area (500–1500 m2/g) and a high affinity for organic compounds. It is normally used in either powdered (PAC) or granular (GAC) ([[Granular filtration]]) form. When the adsorption capacity of the carbon is exhausted, it can be reactivated by burning off the organics in a controlled manner. However, PAC (and some GAC) is normally used only once before disposal.

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