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Removal of antibiotic compounds by adsorption using glycerol-based carbon materials

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dc.contributor.authorÁlvarez-Torrellas, Silvia
dc.contributor.authorRibeiro, Rui
dc.contributor.authorGomes, Helder
dc.contributor.authorOvejero, Gabriel
dc.contributor.authorGarcía, Juan
dc.date.accessioned2016-06-27T13:41:45Z
dc.date.available2016-06-27T13:41:45Z
dc.date.issued2016
dc.description.abstractThis study is focused on the synthesis and application of glycerol-based carbon materials (GBCM200, GBCM300 and GBCM350) as adsorbents for the removal of the antibiotic compounds flumequine and tetracycline from aqueous solution. The synthesis enrolled the partial carbonization of a glycerol-sulfuric acid mixture, followed by thermal treatments under inert conditions and further thermal activation under oxidative atmosphere. The textural properties were investigated through N2 adsorption–desorption isotherms, and the presence of oxygenated groups was discussed based on zeta potential and Fourier transform infrared (FTIR) data. The kinetic data revealed that the equilibrium time for flumequine adsorption was achieved within 96 h, while for tetracycline, it was reached after 120 h. Several kinetic models, i.e., pseudo-first order, pseudo-second order, fractional power, Elovich and Weber–Morris models, were applied, finding that the pseudo-second order model was the most suitable for the fitting of the experimental kinetic data. The estimated surface diffusion coefficient values, Ds, of 3.88 and 5.06 10 14 m2 s 1, suggests that the pore diffusion is the rate limiting step of the adsorption process. Finally, as it is based on SSE values, Sips model well-fitted the experimental FLQ and TCN adsorption isotherm data, followed by Freundlich equation. The maximum adsorption capacities for flumequine and tetracycline was of 41.5 and 58.2 mg g 1 by GBCM350 activated carbon.pt_PT
dc.identifier.citationÁlvarez-Torrellas, S.; Ribeiro, R.S.; Gomes, Helder; Ovejero, G.; García, J. (2016). Removal of antibiotic compounds by adsorption using glycerol-based carbon materials. Chemical Engineering Journal. ISSN 1385-8947. 296, p. 277-288pt_PT
dc.identifier.doi10.1016/j.cej.2016.03.112pt_PT
dc.identifier.urihttp://hdl.handle.net/10198/13025
dc.language.isoengpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectAdsorptionpt_PT
dc.subjectAntibioticspt_PT
dc.subjectCarbon materialspt_PT
dc.subjectEmemrging contaminantspt_PT
dc.titleRemoval of antibiotic compounds by adsorption using glycerol-based carbon materialspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage288pt_PT
oaire.citation.startPage277pt_PT
oaire.citation.titleChemical Engineering Journalpt_PT
oaire.citation.volume296pt_PT
person.familyNameGomes
person.givenNameHelder
person.identifier.ciencia-id6218-1E19-13EE
person.identifier.orcid0000-0001-6898-2408
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication0eb96337-224a-4339-9918-334436fbbb99
relation.isAuthorOfPublication.latestForDiscovery0eb96337-224a-4339-9918-334436fbbb99

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