Types of Activated Carbon for Water Filtration: A Guide
Activated carbon is a popular filtration media used to purify water. It is a form of carbon that has been treated to have a large number of pores and an extensive surface area, making it an effective adsorbent for impurities in water. When water is passed through activated carbon, it attracts and removes impurities, including volatile organic compounds, chlorine, and sediment. In this blog, we will explore the types of activated carbon used in water filtration and their unique properties.
How many types of activated carbon are for water filtration?
Powdered Activated Carbon (PAC)
Powdered activated carbon (PAC) is the most commonly used type of activated carbon in water filtration. It is made by crushing or grinding carbon particles into a fine powder, which is then mixed with water to form a slurry. PAC has a large surface area and a high level of porosity, making it an effective adsorbent for a wide range of impurities in water. It is commonly used in drinking water treatment and in the treatment of industrial wastewater.
The advantages of PAC include its low cost, ease of handling, and flexibility in application. It is also effective in removing organic and inorganic compounds from water, including volatile organic compounds (VOCs), pesticides, and heavy metals. PAC can be used in batch or continuous treatment processes, and it can be added to water treatment systems at various points to improve overall water quality.
Granular Activated Carbon (GAC)
Granular activated carbon (GAC) is another type of activated carbon commonly used in water filtration. Unlike PAC, which is a fine powder, GAC is made up of larger granules of carbon that range in size from 0.2 to 5 millimeters. GAC has a larger surface area than PAC, but it is less effective at adsorbing smaller molecules.
GAC is commonly used in point-of-use water filters, such as those found in home water filtration systems. It is effective at removing impurities such as chlorine, sediment, and volatile organic compounds, as well as improving the taste and odor of water. GAC is also used in the treatment of industrial wastewater and in the remediation of contaminated groundwater.
The advantages of GAC include its ability to remove a wide range of impurities from water, its long service life, and its relatively low cost. However, GAC can be more difficult to handle and apply than PAC due to its larger size, and it may require more frequent replacement.
Extruded Activated Carbon (EAC)
Extruded activated carbon (EAC) is a type of activated carbon that is formed into cylindrical pellets or blocks. EAC has a higher density and greater mechanical strength than PAC or GAC, making it an ideal choice for use in water filtration systems that require high flow rates and pressures.
EAC is commonly used in point-of-entry water filters, which are designed to treat water at the point where it enters a home or building. It is also used in the treatment of industrial wastewater and in the purification of drinking water. EAC is effective at removing impurities such as chlorine, sediment, and volatile organic compounds, as well as improving the taste and odor of water.
The advantages of EAC include its high mechanical strength, which makes it resistant to breakage and attrition, and its ability to treat high flow rates of water. However, EAC is more expensive than PAC or GAC and may require more frequent replacement.
Activated carbon is an effective filtration media used to purify water. The type of activated carbon used in water filtration depends on the specific application, including the type of impurities being removed, the flow rate of water, and the pressure of the system. PAC, GAC, and EAC
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