| http://www.w3.org/ns/prov#value | - In general, it is essential that the material such as the binder, dispersing agents, repellents, pigments added to the impregnating suspension together with the activated carbon, or applied in a second impregnation after the impregnation with active carbon, are free from substances which are absorbed by the activated carbon and have the effect of reducing the useful adsorptive capacity of the acti
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