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Powdered activated carbons (PAC) are used in batch treatment processes, whereas granular (GAC) grades are generally used in fixed filter beds, with the water passing through the filtration medium. The advantage of using GAC for water treatment is that the spent carbon can normally be regenerated via thermal reactivation.
Activated carbon water filters – Drinking Water Treatment. What is Activated Carbon? Activated carbon (AC) is a natural material derived from bituminous coal, lignite, wood, coconut shell etc., activated by steam and other means, and each one have different adsorption properties (e.g. bituminous carbon for high chlorine reduction capacity).
