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Evaluation of dry protonated calcium alginate beads for biosorption applications and studies of lead uptake

2007-11Journal article Restricted access
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dc.contributor.authorLagoa, Ricardo
dc.contributor.authorRodrigues, Joaquim Rui
dc.date.accessioned2017-01-05T15:00:06Z
dc.date.available2017-01-05T15:00:06Z
dc.date.issued2007-11
dc.description.abstractAlginate polysaccharide is a promising biosorbent for metal uptake. Dry protonated calcium alginate beads for biosorption applications were prepared, briefly characterized and tested for lead uptake. Several advantages of this biosorbent are reported and discussed in comparison with other alginate-based sorbents. The alginate beads contained 4.7 mmol/g of COOH groups, which suffered hydrolysis near pH 4. The Weber and Morris model, applied to kinetic results of lead uptake, showed that intraparticle diffusion was the rate-controlling step in lead sorption by dry alginate beads. Equilibrium experiments were performed and the data were fitted with different isotherm models. The Langmuir equation was the most adequate to model lead sorption. The maximum uptake capacity (qmax) was estimated as 339 mg/g and the Langmuir constant (b) as 0.84 l/mg. These values were compared with that of other sorbents found in the literature, indicating that dry protonated calcium alginate beads are among the best biosorbents for the treatment and recovery of heavy metals from aqueous streams.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1007/s12010-007-0041-4pt_PT
dc.identifier.issn1559-0291
dc.identifier.urihttp://hdl.handle.net/10400.8/2348
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.relation.publisherversionhttp://link.springer.com/article/10.1007%2Fs12010-007-0041-4pt_PT
dc.subjectBiosorptionpt_PT
dc.subjectAlginatept_PT
dc.subjectLeadpt_PT
dc.subjectHeavy metalspt_PT
dc.subjectWater treatmentpt_PT
dc.subjectMetal recoverypt_PT
dc.subjectPolysaccharidept_PT
dc.subjectResearch Subject Categories::NATURAL SCIENCES::Chemistry::Physical chemistry::Surface and colloid chemistrypt_PT
dc.subjectResearch Subject Categories::TECHNOLOGY::Bioengineeringpt_PT
dc.subjectResearch Subject Categories::NATURAL SCIENCES::Chemistry::Environmental chemistry::Environmental toxicologypt_PT
dc.titleEvaluation of dry protonated calcium alginate beads for biosorption applications and studies of lead uptakept_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage128pt_PT
oaire.citation.issue2pt_PT
oaire.citation.startPage115pt_PT
oaire.citation.volume143pt_PT
person.familyNameLagoa
person.familyNameRodrigues
person.givenNameRicardo
person.givenNameJoaquim Rui
person.identifier124357
person.identifier.ciencia-id5C18-A29A-44AB
person.identifier.ciencia-id9018-0B83-E2C6
person.identifier.orcid0000-0003-2375-6612
person.identifier.orcid0000-0002-9756-1124
person.identifier.ridL-4137-2014
person.identifier.scopus-author-id23051352300
person.identifier.scopus-author-id10242931100
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication8a139213-9a89-4bd3-93ee-1e332519f96b
relation.isAuthorOfPublication52f6ffb2-43e9-4f78-b414-dbac46f80305
relation.isAuthorOfPublication.latestForDiscovery52f6ffb2-43e9-4f78-b414-dbac46f80305

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