Well International | Tamilnadu | India Granular Activated Carbon (GAC) Filtration: GAC is widely used in water treatment systems as a filtration media. Water is passed through a bed of granular activated carbon, and the carbon adsorbs impurities such as organic compounds, chlorine, volatile organic compounds (VOCs), and some heavy metals. Powdered Activated Carbon (PAC) Addition: Powdered activated carbon is added directly to water to facilitate the adsorption of contaminants. PAC is often used in batch treatment processes or within rapid mixing tanks. Carbon Block Filtration: Carbon block filters are made from compressed activated carbon particles and are used in point-of-use water filters or under-sink systems. Water is forced through the carbon block, and impurities are adsorbed onto the carbon's surface.