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Production of biosorbents from waste olive cake and its adsorption characteristics for Zn2+ Ion

2009Journal article Open access
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dc.contributor.authorFernando, Ana Luisa
dc.contributor.authorMonteiro, Sofia
dc.contributor.authorPinto, Filomena
dc.contributor.authorMendes, Benilde
dc.date.accessioned2009-11-11T09:54:36Z
dc.date.available2009-11-11T09:54:36Z
dc.date.issued2009
dc.description.abstractIn this study, waste olive cake (OC) was utilized as the raw material for the production of biosorbents by chemical treatment and its adsorption capacity for zinc ion was evaluated. Tests were conducted with the total biomass (T) and with the fraction > 2.00 mm (P), in order to determinate the influence of this fractionation step on subsequent treatments. Two chemical agents were used: sulfuric acid and sodium hydroxide. The parameters studied include physical and chemical properties of materials, contact time, pH, adsorbent dose and initial concentrations. The kinetic data were best fitted to the pseudo-second order model. Zinc binding is strongly pH dependent, with more zinc ions bound at a higher pH (5-7 in a range of 3-7). Both Langmuir and Freundlich models are well suited to fit the data on sorption of zinc by OC. Data on sorption of zinc by waste olive cake treated with sulfuric acid (OC-H) was better described by the Freundlich model. Zinc sorption by waste olive cake treated with sodium hydroxide (OC-OH) was better described by the Langmuir model. Results show OC-OH is a biosorbent with a superior adsorption capacity for zinc than OC-H. The maximum adsorption capacity obtained from the Langmuir isotherms increases in the order (mg/g): OC-HT (14), OCT (22) and OC-OHT (27). Results also indicate that the previous fractionation step doesn´t produce a biosorbent with a superior adsorption capacity.pt
dc.identifier.citationSustainability, ISSN 2071-1050, nº 1, 2009, p.277-297pt
dc.identifier.issn2071-1050
dc.identifier.urihttp://hdl.handle.net/10400.9/359
dc.language.isoengpt
dc.subjectBioabsorbentspt
dc.subjectChemical treatmentpt
dc.subjectZinc (II)pt
dc.subjectOlive cakept
dc.subjectAdsorptionpt
dc.titleProduction of biosorbents from waste olive cake and its adsorption characteristics for Zn2+ Ionpt
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage297pt
oaire.citation.startPage277pt
oaire.citation.titleSustainabilitypt
person.familyNameFernando
person.familyNamePinto
person.givenNameAna Luisa
person.givenNameFilomena
person.identifier187613
person.identifier.ciencia-id3415-DCEE-5AC1
person.identifier.orcid0000-0001-9270-3982
person.identifier.orcid0000-0002-1014-568X
person.identifier.ridI-2796-2012
person.identifier.scopus-author-id7004701962
person.identifier.scopus-author-id7102740188
rcaap.rightsopenAccesspt
rcaap.typearticlept
relation.isAuthorOfPublication84cd8318-fb1b-4b9b-88d9-8cb66dd317d3
relation.isAuthorOfPublication115c7b3c-916f-448e-b2d3-c2f3a186d1a2
relation.isAuthorOfPublication.latestForDiscovery84cd8318-fb1b-4b9b-88d9-8cb66dd317d3

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