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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
The nitrogen adsorption/desorption isotherms for the activated carbons (a) prepared by chemical activation (Ac_Ar) and physical activation using carbon dioxide (other samples), (b) prepared by physical activation using carbon dioxide and water vapor.