Activated carbon 

can be used in a wide variety of forms, such as powder or granules, for water treatment. In this process, adsorption causes substances in the water to bind to the carbon. These can include pollutants or impurities, as well as substances that cause color or odor. The effectiveness of activated carbon is demonstrated in laboratory tests when decolorizing everyday products (cola, coffee, etc.)!

Example: Decolorization of red popsicles (strawberry)