Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/27083
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dc.contributor.authorTavares, Daniela S.pt_PT
dc.contributor.authorLopes, Cláudia B.pt_PT
dc.contributor.authorCoelho, João P.pt_PT
dc.contributor.authorSánchez, Marta E.pt_PT
dc.contributor.authorGarcia, Ana I.pt_PT
dc.contributor.authorDuarte, Armando C.pt_PT
dc.contributor.authorOtero, Martapt_PT
dc.contributor.authorPereira, Eduardapt_PT
dc.date.accessioned2019-12-03T14:59:35Z-
dc.date.available2019-12-03T14:59:35Z-
dc.date.issued2011-
dc.identifier.issn0049-6979pt_PT
dc.identifier.urihttp://hdl.handle.net/10773/27083-
dc.description.abstractThis study aimed at evaluating and comparing the removal of arsenic from solutions by a low-cost waste-based sorbent, produced by pyrolysing sewage sludge under appropriate conditions, and by a commercially activated carbon. Batch sorption experiments were performed under isothermal conditions (20°C), in order to evaluate the effect of pH on the arsenic sorption kinetics and on the equilibrium sorption capacity of the materials under study. Kinetic data revealed that the arsenic sorption was faster onto the activated carbon than onto the pyrolysed sludge. The sorption process was well described by both the pseudo-first and pseudo-second-order kinetics equations for both materials. Changes in the initial solution pH have distinct effects on the removal of arsenic onto pyrolysed sludge and activated carbon. While for pyrolysed sludge, pH affects essentially the equilibrium time, for activated carbon it affects the sorption capacity. Equilibrium results were well described by both Freundlich and Langmuir isotherm models, although fittings corresponding to the Langmuir isotherm were slightly better. The Langmuir maximum sorption capacity determined for the pyrolysed sludge was 71 μg g−1, while for activated carbon was 229 μg g−1. Despite the relative lower capacity of the pyrolysed sludge, the considerable lower cost and the valorisation of the sludge may justify further research on its use for water decontamination.pt_PT
dc.language.isoengpt_PT
dc.publisherSpringerpt_PT
dc.relationinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F45156%2F2008/PTpt_PT
dc.relationinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F48449%2F2008/PTpt_PT
dc.rightsrestrictedAccesspt_PT
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectArsenicpt_PT
dc.subjectWater decontaminationpt_PT
dc.subjectSewage sludgept_PT
dc.subjectActivated carbonpt_PT
dc.subjectBiowastept_PT
dc.subjectPyrolysispt_PT
dc.subjectSorptionpt_PT
dc.titleRemoval of arsenic from aqueous solutions by sorption onto sewage sludge-based sorbentpt_PT
dc.typearticlept_PT
dc.description.versionpublishedpt_PT
dc.peerreviewedyespt_PT
degois.publication.firstPage2311pt_PT
degois.publication.issue5pt_PT
degois.publication.lastPage2321pt_PT
degois.publication.titleWater, Air, and Soil Pollutionpt_PT
degois.publication.volume223pt_PT
dc.identifier.doi10.1007/s11270-011-1025-0pt_PT
dc.identifier.essn1573-2932pt_PT
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DQ - Artigos

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