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Granular Activated Carbon (GAC) is a type of carbon used for filtration of water and air. It is made from coal, wood, or coconut shells that have been heated to high temperatures in an oxygen-free environment, or pyrolyzed, to create an extremely porous material with a large surface area. This large surface area makes GAC an ideal material for trapping and absorbing impurities from water and air.
GAC is used for a variety of water and air purification applications, including the removal of chlorine, volatile organic compounds, odours, and other impurities. GAC is also used in industrial processes to remove contaminants from wastewater streams, and in medical procedures like hemodialysis.
GAC has become increasingly popular in recent years due to its high efficiency and low cost. The material is also relatively environmentally friendly, as it can be recycled and reused multiple times, and it has a long life span. GAC can also be used in combination with other filtration methods, such as reverse osmosis, to create a more comprehensive filtration system.
GAC is available in a variety of sizes, from fine powders to large granules. It is most often used in the form of a filter cartridge, which is installed in a water filtration system or air purifier. The GAC filter cartridge is typically made up of layers of the activated carbon and other materials, such as sand, gravel, or ceramic beads. As the water or air passes through the filter, the GAC absorbs the impurities, leaving clean water or air on the other side.
The Global Granular Activated Carbon market accounted for $XX Billion in 2023 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2024 to 2030.
A range of granulated activated carbons produced from premium bituminous coal and premium coconut shells is offered by Systematix. It is produced using hydrochloric acid acid washing and high temperature steam activation under strict quality control. It has a high pore volume, great mechanical hardness, and chemical stability. It also has a wide surface area. They use carbon derived from coal to remove organic pollutants, tastes, odours, colour, and turbidity from ultra-pure water. Their granular activated carbon from coconut shells is made specifically for water purification, including the production of cartridges for hemodialysis, kidney dialysis, and drinkable water.
In Europe and the US, granular activated carbon (GAC) is widely used to eliminate micropollutants such pesticides, industrial chemicals, tastes, and smells. In Australia, it’s also gaining traction, especially for eliminating taste and odour and protecting water sources from the potential for harmful algal blooms. Particle sizes range from 0.4 to 2.5 mm, which is bigger than PAC
Typically, granular activated carbon is applied as the last polishing stage following traditional treatment but prior to disinfection. GAC has the advantage of offering a continuous barrier against sporadic occurrences of water source contamination due to its enormous quantity of carbon, which creates a vast surface area. The granular activated carbon (GAC) adsorbers used for the removal of organics are comparable to quick gravity or pressure type sand filters, with the exception that gravity type adsorbers are typically completely covered or contained within buildings.
Because GAC is a good filter medium, it may be used alone to filter out turbidity. However, because it is more friable than sand, it would require aggressive and frequent washing in order to maintain its filtration effectiveness. Losses in the form of fines would therefore be significantly higher than if adsorption was the main purpose.When GAC’s capacity to bind to organic molecules runs out, it should be revived.
