Wednesday, September 20, 2017

Activated Carbon Filtration

Activated carbon (aka charcoal) is charcoal that has been oxygenated which opens up millions of tiny pores between the atoms.

This results in highly porous charcoal material that has a huge surface area that will adsorb certain materials. Adsorption is the process by which things attach by chemical attraction.

Activated carbon (also known as Granular Activated Carbon or GAC) is good at trapping organic materials and addressing taste and odor issues. It will adsorb chlorine, but it is not effective in removing inorganic contaminants such as nitrates, sodium, microbes, fluoride, hardness or other inorganic materials. It does not chloramines either, which requires a catalytic-based carbon.

Once all of the “bonding sites” are filled, an activated carbon filter stops working and the filter/media needs to be replaced. This is usually evident by taste and odor issues returning to the water.

Activated carbon is often used in conjunction with other types of media to provide comprehensive filtration.