| http://www.w3.org/ns/prov#value | - While GAC is normally categorized under chemical filtration, it also has some mechanical filtration (see below) properties.Granular activated carbon acts as an organic sponge.The carbon is very porous, allowing it to trap physical particles.The process of trapping the waste particles is called absorption.There are also chemical properties that make carbon attract certain forms of impurities such a
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