People exposed to formaldehyde may experience watery eyes, burning sensations in the eyes, nose, and throat coughing wheezing nausea and skin irritation when inhaled. Materials containing formaldehyde such as wood products, medicines, cosmetics, fabrics, paints and pesticides can release formaldehyde as a gas or vapor into the air. However, this chemical is considered toxic to humans. Formaldehyde is a colorless, strong-smelling gas that is usually used for disinfection and antisepsis in hospitals, as a preservative in mortuaries and medical laboratories and as an adhesive in building materials, appliances and furniture.Below are examples of VOCs that can be found in homes and offices: Similar to tobacco smoke, VOCs consist of many dangerous chemicals that can cause cancer. They can remain suspended in the air for a long time and can harm those inside the room. The concentrations of VOCs are up to ten times higher for indoor air pollution than outdoor. Examples of it are the smoke released from burning wood or coal in a fireplace, or from using a kerosene heater and gas appliances like stoves and laundry dryers. Volatile organic compounds are very small gases released from certain solids or liquids. Tobacco is made up of over 7,000 chemicals, 70 of which are carcinogenic and another 180 are known to be harmful to health, causing heart, lung and other diseases. It is inserted into the air purifier to trap and remove gas molecules and VOCs from the air, pollutants that HEPA filters cannot handle. What pollutants can Activated Carbon remove?Īctivated Carbon is used in conjunction with air purifiers particularly HEPA air filters. Meanwhile, if the fluid’s atoms, ions or molecules stick to a surface of liquid or solid adsorbent, it’s called adsorption. Absorption happens when a fluid passes through or enters inside a liquid or solid absorbent. Their one distinct difference is the place where the fluid gets trapped. It is injected with hot air, carbon dioxide, or steam to create grids of tiny pores that trap gas molecules.Īctivated carbon uses the adsorption process to remove pollutants from the air. Coconut shells also produce lesser amounts of dust and fine carbon particles compared to wood and coal.Ĭarbon gets activated by undergoing additional processes to make it better at trapping gas molecules. The former have more surface area and general porosity. They are made by taking solid pieces of carbon and pulverizing them into smaller grains.Īctivated carbon made from coconut shells are preferable over those made from wood or carbon. These pellets of carbon last much longer than Powdered Activated Carbon or PAC. Granular Activated Carbon or GAC is commonly used in air filters. It was first used by the British Army in chemical warfare to remove gases.Īctivated carbon is available mainly in powdered or granular form. The Activated Carbon filter or charcoal filter was originally called HEGA (High Efficiency Gas Absorption) filter. We look at the importance of activated carbon in air purification for homes and offices. Activated Carbon is used in high quality air purifiers because of its effectiveness in removing harmful gases not addressed by HEPA filters.
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