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E-Journal of Chemistry
Volume 7 (2010), Issue 2, Pages 531-539

Preparation and Characterization of Activated Carbon Monoliths with Potential Application as Phenol Adsorbents

Diana Paola Vargas-Delgadillo,1 Liliana Giraldo,1 and Juan Carlos Moreno-Piraján2

1Faculty of Sciences, Department of Chemistry, Universidad Nacional de Colombia, Colombia
2Faculty of Sciences, Department of Chemistry, Research Group of Porous Solids and Applied Calorimetry, Universidad de Los Andes, Colombia

Received 2 February 2009; Accepted 6 June 2009

Copyright © 2010 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A series of different activated carbons of both honeycomb and disc type were prepared by chemical activation of coconut shells with zinc chloride at different concentrations, without the use of a binder. The structures were characterized by N2 adsorption at 77 K and scanning electron microscopy (SEM), and also some samples were characterized by immersion calorimetry in benzene. These were subsequently used in the adsorption of phenol in aqueous solution. The experimental results indicat that activation with zinc chloride produced a large development of microporosity with a micropore volume of 0.38 to 0.79 cm3 g-1, BET area between 725 and 1523 m2 g-1 and the capacity to adsorb phenol. In addition, the BET and Langmuir models were applied to isotherm data.