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Removal of naphthalene from aqueous solution on chemically modified activated carbons

AutorOvín Ania, María Concepción ; Cabal Álvarez, Belén; Pevida García, Covadonga ; Arenillas de la Puente, Ana ; Parra Soto, José Bernardo ; Rubiera González, Fernando ; Pis Martínez, José Juan
Palabras clavePAH
Liquid phase
Activated Carbon
Fecha de publicaciónene-2007
CitaciónWater Research 41(2): 333–340 (2007)
ResumenThe aim of this work was to correlate the textural and chemical features of carbonaceous adsorbents with the adsorption capacity of naphthalene from aqueous phase, at the concentration in which this compound is usually found in wastewater from coke ovens. The study reveals that the adsorption capacity in different carbon materials depends not only on the textural characteristics of the material but also on the functionalities of the activated carbons. The micropores of the adsorbents, particularly those of narrower diameter, were found to be active sites for the retention of naphthalene. In contrast, the modification of the surface chemistry of the carbon materials led to a decrease in the adsorption capacities. Dispersive forces play an important role, and adsorbents with a higher non-polar character have proven to be more efficient for the naphthalene adsorption. This behaviour has been linked to the presence of specific interactions between the basal planes and the polyaromatic structure of the naphthalene molecule.
Descripción8 pages, 6 figures, 3 tables.-- PMID: 17126375 [PubMed].-- Available online on Nov 27, 2006.
Versión del editorhttp://dx.doi.org/10.1016/j.watres.2006.10.016
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