Chemical modification of activated carbons and its effect on the adsorption of phenolic compounds

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dc.contributor.authorAna María Carvajal-Bernal
dc.contributor.authorFernando Gómez
dc.contributor.authorLiliana Giraldo
dc.contributor.authorJuan C. Moreno-Pirajá
dc.coverage.spatialBolivia
dc.date.accessioned2026-03-22T14:38:38Z
dc.date.available2026-03-22T14:38:38Z
dc.date.issued2015
dc.descriptionCitaciones: 13
dc.description.abstract(Eng) In this paper two commercial activated carbons, granular and pelletized, were impregnated with aqueous solutions of phosphoric acid (H3PO4), or potassium hydroxide (KOH) in 60% w/w concentrations under moderate temperature conditions (18 °C). It was observed that the impregnation with phosphoric acid increases the adsorption of 2,4-dinitrophenol regarding the starting activated carbon. The adpsorption was determined from isotherms in aqueous solution of phenol and 2,4-dinitrophenol, and experimental data were adjusted to the Freundlich, Langmuir, Toth and Prausnitz-Radke models. Langmuir was the model that best fitted for phenol adsorption, and Toth was the model that best fitted the for 2,4-dinitrophenol adsorption. The results showed that the impregnation of activated carbons without post further heating continued creating changes in surface chemistry and porous structure.
dc.identifier.urihttps://andeanlibrary.org/handle/123456789/47709
dc.language.isoen
dc.publisherUniversidad del Valle
dc.relation.ispartofUnivalle Digital Repository (University of Valle)
dc.sourceUniversidad Nacional de Colombia
dc.subjectAdsorption
dc.subjectLangmuir
dc.subjectChemistry
dc.subjectPotassium hydroxide
dc.subjectPhosphoric acid
dc.subjectActivated carbon
dc.subjectFreundlich equation
dc.subjectPhenol
dc.subjectAqueous solution
dc.subjectInorganic chemistry
dc.titleChemical modification of activated carbons and its effect on the adsorption of phenolic compounds
dc.typearticle

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