Adsorption of phenol from aqueous solution by activated carbons derived from cherry stones

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Adsorption of phenol from aqueous solution by activated carbons derived from cherry stones

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Title: Adsorption of phenol from aqueous solution by activated carbons derived from cherry stones
Author: Álvarez Peña, Pedro Modesto; Jaramillo Romero, Josefa; Gómez Serrano, Vicente
Abstract: En este trabajo se han preparado carbones activados mediante activación física (con aire, dióxido de carbono y vapor de agua) a partir de huesos de cereza. Los carbones activados se han caracterizado desde el punto de vista textural (adsorción de nitrógeno a 77 K y porosimetría de mercurio) y químico (grupos superficiales de oxígeno y punto de carga cero). Las muestras preparadas se han empleado para adsorber fenol en disolución, mostrando mayor capacidad de adsorción a medida que lo hace la superficie específica y microporosidad. No obstante, la adsorción química de fenol se vio favorecida por la presencia de grupos superficiales de oxígeno en el carbón. Los carbones preparados con dióxido de carbono y vapor de agua mostraron una capacidad de adsorción de fenol comparable a la del carbón comercial Filtrasorb-400.Samples of activated carbon were obtained by physical activation (air, carbon dioxide and steam as activating agents) of cherry stones. Activated carbon samples were characterized from the textural (nitrogen adsorption at 77 K and mercury porosimetry) and surface chemistry (surface oxygen groups and point of zero charge) points of view. Samples were used to adsorb phenol from aqueous solution, showing that phenol uptake was related to the surface area and microporosity. Nevertheless, chemisorption of phenol was favoured by surface oxygen groups. Samples activated in CO2 and steam showed phenol adsorption capacities close to that of Filtrasorb-400, a well-known commercial activated carbon.
URI: http://hdl.handle.net/10662/6604
Date: 2016


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