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What is Activated Carbon?

Using Activated Carbon in Everfilt® Media Filters to Treat Water & Wastewater:

What is Activated Carbon?

Activated Carbons are charred, highly porous powders, granules or pellets that are made from a variety of raw materials (such as: coal, lignite, petroleum, wood, coconut shell, walnut shell, peat and bone).

These raw materials are transformed into reactivated carbon through a process of dehydration, heating at high-temperature and exposure to gases. Activated carbons can be treated further or chemically coated to remove specific chemicals. These are known as Impregnated Carbons and they are formulated to remove chemical compounds that are difficult to remove with the carbons made from the basic process.

How is Activated Carbon Used?

Activated Carbon is used in water and wastewater treatment to remove a wide range of natural and synthetic soluble organic molecules that are dissolved in solution. Molecular size varies depending upon the substance. In some applications, molecules of different sizes will need to be removed. This is an important factor because molecular size affects the selection of the specific carbon product to be used. For example, color molecules are large and are usually treated with a wood base carbon.

Some of the molecular compounds that can be removed by activated carbon include:

  • Toluene

  • Acetates

  • Alcohols

  • Ammonia

  • Arsine

  • Chlorinated Hydrocarbons

  • Formaldehyde

  • Hexane

  • VOC's