Carbon filtration, also known as activated carbon filtration, is a method used to remove various contaminants from liquids and gases by utilizing the adsorption properties of activated carbon. Activated carbon is a porous material that can attract and retain a wide range of impurities and contaminants through a process called adsorption, where molecules adhere to the surface of the carbon.

Key features of carbon filtration include:

Adsorption: Activated carbon has a large surface area with numerous tiny pores and a high affinity for organic and certain inorganic compounds. As liquids or gases pass through the carbon filter, contaminants are trapped on the carbon’s surface through adsorption. This process effectively removes substances like chemicals, odors, volatile organic compounds (VOCs), and some gases.

Versatility: Carbon filtration is versatile and can be used in various applications. It’s commonly employed in water treatment to remove chlorine, taste, odor, and certain organic contaminants. In air purification, activated carbon filters can remove airborne pollutants and odors. Additionally, activated carbon is used in industrial processes, such as refining, food and beverage production, and pharmaceutical manufacturing.

Granular vs. Powdered Carbon: Activated carbon can be used in different forms, including granular activated carbon (GAC) and powdered activated carbon (PAC). GAC is often used in water treatment systems, where water passes through a bed of granules, allowing for longer contact time and better adsorption. PAC, on the other hand, is a finely ground powder that is often used in specialized applications or in situations where rapid adsorption is required.

Activated carbon filters are commonly used in conjunction with other filtration methods to achieve comprehensive purification or treatment. For example, in air purifiers, HEPA filters are often used alongside activated carbon filters to provide both particle and gas-phase contaminant removal. When selecting a carbon filtration system, it’s important to consider factors like the specific contaminants you need to remove, the flow rate, the type of activated carbon, and the filter’s maintenance requirements.