Publication
Cr(III) uptake by marine algal biomass: equilibrium and kinetics
| dc.contributor.author | Vilar, Vítor J.P. | |
| dc.contributor.author | Freitas, Olga | |
| dc.contributor.author | Costa, Pedro | |
| dc.contributor.author | Botelho, Cidália | |
| dc.contributor.author | Martins, Ramiro | |
| dc.contributor.author | Boaventura, Rui | |
| dc.date.accessioned | 2012-07-03T08:49:23Z | |
| dc.date.available | 2012-07-03T08:49:23Z | |
| dc.date.issued | 2011 | |
| dc.description.abstract | In this work, biosorption of trivalent chromium by the marine brown algae Sargassum muticum was 37 studied in a batch system. The effect of the solution pH on Cr(III) uptake by Sargassum was 38 investigated. Kinetics and equilibrium experiments were conducted at different pH values (3.0, 4.0 and 39 5.0). Equilibrium data are well described by the Langmuir and Langmuir-Freundlich isotherms and 40 kinetics follows the pseudo-second-order model, at different pH values. The two mass transfer models 41 give comparable results, but they did not provide a perfect representation of the sorption data. The 42 homogeneous diffusivity, Dh, was found to be around 1.6´10-8 cm2 s-1 for 100 mg l-1 Cr(III) 43 concentration. 44 Sargassum muticum was compared with the brown algae Laminaria hyperborean and the red algae 45 Gelidium sesquipedale in terms of uptake capacity. The maximum uptake capacities for Sargassum, 46 Laminaria and Gelidium were, respectively, 56 ± 3, 70 ± 4 and 18 ± 1 mg Cr(III) g-1, at pH = 5. | por |
| dc.description.sponsorship | Financial support by FCT and European Community through FEDER (project POCI/AMB/57616/2004) is gratefully acknowledged. The authors are grateful to FCT for V. Vilar’s doctorate scholarship (SFRH/BD/7054/2001). | |
| dc.identifier.citation | Vilar, Vitor; Freitas, Olga; Costa, Pedro; Botelho, Cidália; Martins, Ramiro; Boaventura, Rui (2011). Cr(III) uptake by marine algal biomass: equilibrium and kinetics. International Journal of Environment and Waste Management. ISSN 1478-9876. 8:3-4, p. 325-340 | por |
| dc.identifier.doi | 10.1504/IJEWM.2011.042639 | |
| dc.identifier.eissn | 1478-9868 | |
| dc.identifier.issn | 1478-9876 | |
| dc.identifier.uri | http://hdl.handle.net/10198/7111 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.publisher | Inderscience Publishers | |
| dc.relation | REMOÇÃO DE IÕES METÁLICOS EM SOLUÇÃO AQUOSA POR RESÍDUOS DA INDÚSTRIA DE EXTRACÇÃO DE AGAR | |
| dc.subject | Sargassum | por |
| dc.subject | Gelidium | por |
| dc.subject | Laminaria | por |
| dc.subject | Equilibrium | por |
| dc.subject | Sargasskinetics | por |
| dc.subject | Marine algae | por |
| dc.title | Cr(III) uptake by marine algal biomass: equilibrium and kinetics | por |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.awardTitle | REMOÇÃO DE IÕES METÁLICOS EM SOLUÇÃO AQUOSA POR RESÍDUOS DA INDÚSTRIA DE EXTRACÇÃO DE AGAR | |
| oaire.awardURI | info:eu-repo/grantAgreement/FCT/POCI/POCI%2FAMB%2F57616%2F2004/PT | |
| oaire.awardURI | info:eu-repo/grantAgreement/FCT/POCI-2010/SFRH%2FBD%2F7054%2F2001/PT | |
| oaire.citation.endPage | 340 | por |
| oaire.citation.startPage | 325 | por |
| oaire.citation.title | International Journal of Environment and Waste Management (IJEWM) | por |
| oaire.fundingStream | POCI | |
| oaire.fundingStream | POCI-2010 | |
| person.familyName | Martins | |
| person.givenName | Ramiro | |
| person.identifier.ciencia-id | EA17-F39C-29C7 | |
| person.identifier.orcid | 0000-0003-4327-7782 | |
| project.funder.identifier | http://doi.org/10.13039/501100001871 | |
| project.funder.identifier | http://doi.org/10.13039/501100001871 | |
| project.funder.name | Fundação para a Ciência e a Tecnologia | |
| project.funder.name | Fundação para a Ciência e a Tecnologia | |
| rcaap.rights | openAccess | por |
| rcaap.type | article | por |
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