After the primary filter has removed the pollution particles, the air moves into an activated carbon filter. How is activated carbon made? Activated carbon is carbon
that has been treated with oxygen
. The treatment gives carbon millions of tiny holes. These tiny holes give the charcoal a tremendously large surface. The gases pass through the charcoal where it is trapped. This process is called adsorption
. Activated charcoal absorbs smoke odor like a sponge. It is the best product known for removing this smell. At LakeAir we use coconut shell carbon it is better than bituminous carbon (made from coal) at removing odors common to homes and commercial applications.
Every smoke removal solution should include activated charcoal as part of its air cleaning system. Each granule of carbon has a specific amount of odor it can hold. When a carbon granule has adsorbed as many odors as it can, it is saturated. The filter then needs to be replaced. There are over 150 types of activated carbon. LakeAir carbon filters use high quality carbon manufactured specifically for the removal smoke odor and other common gasses and VOCs.
Some VOCs like TCE (dry cleaner fluid) are more likely to be absorbed by potassium permanganate impregnated zeolite. At LakeAir we have the ability to produce sophisticated carbon blends to better handle odors and VOCs for special applications