What is Granular Activated Carbon?
Granular activated carbon or GAC is a type of filter media made from raw organic materials that are high in carbon like coal and coconut shells. With the use of heat and the absence of oxygen, the surface area of the raw organic material increases or enter the activation process. Granular activated carbon is among the more common type of filter media used to remove certain chemicals by trapping (absorbing) them into the surface of the activated carbon material.
The use of GAC became popular and more common in the 20th century due to its efficiency in removing contaminants in the water. With the application of the “activation” process on carbon, more and more water filtration companies, as well as individuals, began using the granular filter media as a part of their water purification systems.
What is Granular Activated Carbon Used for?
The granular activated carbon is a filter media used to purify liquids and gases. According to the EPA, the granular filter material can remove all 12 identified herbicides, and 14 pesticides, including the 32 identified organic contaminants. Granular activated carbon also removes chemicals that affect the quality of your drinking water, like chlorine.
How Does Granular Activated Carbon Work?
With its improved pore volume, surface area, and structure, granular activated carbon is one of the best in removing certain chemicals within the water. In a properly designed water filter system, GAC is an efficient filter media capable of absorbing contaminants to prevent them from getting through the faucet. The primary mechanism by which granular activated carbon (GAC) works is by absorption. Since the filter material attracts organic compounds and other non-polar contaminants, it absorbs them as they enter the filter chamber.
What are the Types of Granular Activated Carbon Filters?
There are two types of filters where granular activated carbon significantly contributes to the removal of contaminants: whole house water filter and point of use filter. As an effective filter material, the application of GAC in either type of filter will greatly improve the quality of the incoming water.
What are the Advantages of Granular Activated Carbon?
As mentioned above, the use of GAC in a water filter system can help remove certain chemicals, including chloramines from your water supply. Therefore, assuring the purity of drinking water in your home, whether the application is for whole house water filter or point of use filter. Compared to powdered activated carbon, the granular type will last longer thanks to its harder physical property. When it comes to cleaning, they are a lot easier to clean and can be used and reactivated more times compared to the powdered form.
Is Granular Activated Carbon Safe for Use?
Granular activated carbon in its original state is safe for use since it is not a hazardous material. However, it may become a hazardous material if you do not follow proper government disposal management.