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Dual-function hydrotalcite-derived adsorbents with sulfur storage properties: Dyes and hydrotalcite fate in adsorption-regeneration cycles

2017Journal article Open access
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dc.contributor.authorStawiński, Wojciech
dc.contributor.authorWęgrzyn, Agnieszka
dc.contributor.authorFreitas, Olga
dc.contributor.authorChmielarz, Lucjan
dc.contributor.authorFigueiredo, Sónia
dc.date.accessioned2019-05-30T15:22:44Z
dc.date.available2019-05-30T15:22:44Z
dc.date.issued2017
dc.description.abstractThermal treatment of hydrotalcite at increasing temperatures resulted in formation of mixed oxides that exhibited different adsorption behavior toward anionic and cationic industrial dyes. The material annealed at 450 °C was characterized by the highest maximum adsorption capacity for both types of dyes. The adsorption was strongly pH dependent and for the anionic dye abatement low pH was favored whilst higher pH was more preferable for removal of the cationic dye. According to the equilibrium experiments, the maximum adsorption capacity increased from 179 ± 5 to 291 ± 8 mg g−1 in case of the anionic dye at pH 3.5 and from 6 ± 2 to 48 ± 2 mg g−1 in case of the cationic dye at pH 8.0, on starting and thermally treated material at 450 °C, respectively. Detailed characteristics of spent adsorbent and its reconstructed form revealed that after each cycle of adsorption and thermal regeneration the maximum adsorption capacity of the material decreased due to changes in the structure and accumulation of sulfur compounds. Evolution of specific surface area and porosity was correlated with annealing temperatures and behavior of dye's residues.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.micromeso.2017.05.017pt_PT
dc.identifier.issn1387-1811
dc.identifier.urihttp://hdl.handle.net/10400.22/13813
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S138718111730344X?via%3Dihubpt_PT
dc.subjectHydrotalcitept_PT
dc.subjectThermal treatmentpt_PT
dc.subjectRemoval of dyespt_PT
dc.subjectSpent adsorbentpt_PT
dc.subjectSulfur accumulationpt_PT
dc.titleDual-function hydrotalcite-derived adsorbents with sulfur storage properties: Dyes and hydrotalcite fate in adsorption-regeneration cyclespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/COMPETE/PEst-C%2FEQB%2FLA0006%2F2013/PT
oaire.citation.endPage87pt_PT
oaire.citation.startPage72pt_PT
oaire.citation.titleMicroporous and Mesoporous Materialspt_PT
oaire.citation.volume250pt_PT
oaire.fundingStreamCOMPETE
person.familyNameFreitas
person.familyNameFigueiredo
person.givenNameOlga
person.givenNameSónia
person.identifier1104854
person.identifier.ciencia-id6915-A6F2-F8A1
person.identifier.orcid0000-0002-2499-6143
person.identifier.orcid0000-0001-8548-2528
person.identifier.ridD-8307-2013
person.identifier.ridD-8292-2013
person.identifier.scopus-author-id18634256400
person.identifier.scopus-author-id7004125737
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication0ad2655f-ef25-4db8-a093-693abeaff50b
relation.isAuthorOfPublication692766a7-ed88-44e8-aed6-13d3ff5a07b0
relation.isAuthorOfPublication.latestForDiscovery692766a7-ed88-44e8-aed6-13d3ff5a07b0
relation.isProjectOfPublication81c785e2-6b3f-4488-beb5-943583d0176c
relation.isProjectOfPublication.latestForDiscovery81c785e2-6b3f-4488-beb5-943583d0176c

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