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Cadmium uptake by algal biomass in batch and continuous (CSTR and packed bed column) adsorbers

2008Journal article Open access
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dc.contributor.authorVilar, Vítor J.P.
dc.contributor.authorSantos, Sílvia
dc.contributor.authorMartins, Ramiro
dc.contributor.authorBotelho, Cidália
dc.contributor.authorBoaventura, Rui
dc.date.accessioned2010-02-18T16:57:18Z
dc.date.available2010-02-18T16:57:18Z
dc.date.issued2008
dc.description.abstractIn this work, the properties of marine algae Gelidium, algal waste from agar extraction industry and a composite material were investigated for cadmium(II) biosorption. Equilibrium experiments were performed at three pH values (4, 5.3 and 6.5). Equilibrium data were well described by the Langmuir and Langmuir–Freundlich isotherms. Two models predicting the pH influence in the cadmium biosorption (discrete and continuous models) have been developed in order to better describe the equilibrium. The continuous model also considers a heterogeneous distribution of carboxylic groups, determined by potentiometric titration. The results of batch kinetic experiments performed at different pH values were well fitted by two mass transfer models and the homogeneous diffusion coefficients for the cadmium ions inside the biosorbentwere obtained. Continuous stirred tank reactor (CSTR) and packed bed column configurationswere also examined for the biosorption of cadmium ions. A strong acid (0.1MHNO3)was used as eluant to regenerate the biosorbents in the column. Several mass transfer models were applied with success to describe the biosorption process in batch mode, CSTR and fixed bed column.pt
dc.description.sponsorshipFinancial support for this work was in part provided by national research Grant FCT/POCTI/AMB/57616/2004 and by LSRE financing by FEDER/POCI/2010, for which the authors are thankful. V. Vilar acknowledges his Ph.D. scholarship by FCT (SFRH/BD/7054/2001).
dc.identifier.citationVilar, Vitor; Santos, Sílvia; Martins, Ramiro; Boaventura, Rui (2008). Cadmium uptake by algal biomass in batch and continuous (CSTR and packed bed column) adsorbers. Biochemical Engineering Journal. ISSN 1369-703X. 42:3, p. 276-289pt
dc.identifier.doi10.1016/j.bej.2008.07.008
dc.identifier.issn1369-703X
dc.identifier.urihttp://hdl.handle.net/10198/2006
dc.language.isoeng
dc.publisherElsevierpt
dc.subjectBiosorptionpt
dc.subjectAlgal biomasspt
dc.subjectBatchpt
dc.subjectCSTRpt
dc.subjectPacked bed columnpt
dc.titleCadmium uptake by algal biomass in batch and continuous (CSTR and packed bed column) adsorberspt
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/POCI/POCI%2FAMB%2F57616%2F2004/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBD%2F7054%2F2001/PT
oaire.citation.endPage289pt
oaire.citation.issue42(1)pt
oaire.citation.startPage276pt
oaire.citation.titleBiochemical Engineering Journalpt
oaire.fundingStreamPOCI
oaire.fundingStreamSFRH
person.familyNameMartins
person.givenNameRamiro
person.identifier.ciencia-idEA17-F39C-29C7
person.identifier.orcid0000-0003-4327-7782
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt
rcaap.typearticlept
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relation.isAuthorOfPublication.latestForDiscoverybf713e37-c17f-4a4e-8323-a7b770a038bf
relation.isProjectOfPublicationc6d10d36-8eb5-41d8-afb6-2d3f731a06f9
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relation.isProjectOfPublication.latestForDiscoveryc6d10d36-8eb5-41d8-afb6-2d3f731a06f9

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