Activated Carbon: The Natural Air Purifier

If odors, chemicals, or gases are a problem in your home or workplace, using an air purifier with an activated carbon filter can be your best line of defense.

Carbon has been known to man as a highly effective means to purify air and water since antiquity. In fact, the use of carbon dates so far back into history that its exact origin has been difficult to pinpoint. However, historians have found that the ancient Egyptians were using carbon to adsorb odors from wounds and from within the intestinal track. Hindus used it to purify their water supply, and in 17th century London, crude carbon filters were used to remove gases and vapors from sewage systems. Nonetheless, it wasn't until the 20th century that activated carbon filters were beginning to be widely used in military gas masks, and post-war expansion in commercial production of activated carbon lead to its utilization among consumers.

What is Activated Carbon?
Activated carbon, or activated charcoal, includes carbon material that is mostly derived from charcoal. The material is considered "activated" when it undergoes a process which opens up millions of tiny fissures and pores to enhance its adsorption properties, and regardless of the name, it consists of high adsorbent material with an exceptionally high surface area. Due to this high surface area, its micro porosity, and its high degree of surface reactivity, activated carbon is very effective in the adsorption of both organic and inorganic pollutants from airborne and aqueous sources. In fact, only one pound of activated carbon has a surface area equivalent to 125 acres.

How Does Activated Carbon Work?
When chemicals, odors, and gases pass through an air purifier with an activated carbon filter, these pollutants become permanently trapped in the millions of pores that are opened by the activation process. Subsequently, due to the large surface area of the activated carbon, it can usually adsorb up to 60 percent of its own weight in pollutants. As well, high-quality activated carbon filters, depending on the environment in which they are used and the level of contaminants in the air, can last up to five years before the pores become full and before the filter needs to be replaced.

Air Purifiers with Activated Carbon Filters
In activated carbon air purifiers, the carbon media is often combined with minerals such as zeolite, which has the ability to adsorb ions and molecules and act as a sort of chemical and gas sieve. For those suffering from respiratory disorders such as allergies, asthma, or multiple chemical sensitivity (MCS), air purifiers with carbon filters are especially useful because they can clean the air naturally without the use of chemicals or ozone, and without off-gassing other pollutants into the air.

Recommend Activated Carbon Air Purifiers:

Austin Air

Austin Air has been a trusted name in the air purification industry for years, and the basic scientific principle involved in all of their air purifier filters, including those used in the Austin Air Allergy Machine, is rooted in the use of medical-grade HEPA and of course, activated carbon. By forcing contaminated air through these filters, up to 99.97% of contaminants are eliminated, as well as over 3000 different types of toxic gases, odors, and chemicals.

AllerAir


Instead of just using a standard HEPA filter to clean the air, AllerAir makes use of a combination HEPA and activated carbon filter to remove particles and the most harmful of indoor contaminants - chemicals and gases. AllerAir air purifiers, such as the AllerAir 5000 Vocarb, use several pounds of activated carbon to ensure complete removal of indoor contaminants. Moreover, AllerAir also manufacturers a product called the EasyPur Odor Catcher. This compact tub includes the same odor-fighting activated carbon used in AllerAir air purifiers, and can be placed anywhere where odors may be a problem, such as refrigerators, freezers, trash cans, and lockers.