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Biosorption of zinc ions from aqueous solution by the microalga Scenedesmus obliquus

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dc.contributor.authorMonteiro, Cristina M.
dc.contributor.authorCastro, Paula M. L.
dc.contributor.authorMalcata, F. Xavier
dc.date.accessioned2012-01-17T11:22:16Z
dc.date.available2012-01-17T11:22:16Z
dc.date.issued2011
dc.description.abstractAquatic environments are often exposed to toxic heavy metals, which gain access to the food chain via microalgae and may cause severe problems at higher trophic levels. However, such a metabolic specificity can be taken advantage of in bioremediation strategies. The potential of a novel wild strain of Scenedesmus obliquus, previously isolated from a heavy metal-contaminated site in northern Portugal, to remove Zn from aqueous solutions was thus studied, using several initial concentrations. The removal extent reached its maximum by 1 day: 836.5 mg Zn/g biomass, at the initial concentration of 75 mg/L, mainly by adsorption onto the cell surface. Comparative studies encompassing a commercially available strain of the same microalgal species led to a maximum removal extent of only 429.6 mg Zn/g biomass, under identical conditions. Heat-inactivated cells permitted a maximum removal of 209.6 mg Zn/g biomass, at an initial concentration of 50 mg Zn/L. The maximum adsorption capacity of Zn, estimated via Langmuir's isotherm, was 330 mg Zn/g biomass. Finally, Zn removal was highest at pH 6.0-7.0. It was proven, for the first time, that such a wild microalga can uptake and adsorb Zn very efficiently, which unfolds a particularly good potential for bioremediation. Its performance is far better than similar (reference) species, especially near neutrality, and even following heat-treatment.por
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.citationMONTEIRO, Cristina M.; CASTRO, Paula M. L.; MALCATA, F. Xavier - Biosorption of zinc ions from aqueous solution by the microalga Scenedesmus obliquus. Environmental Chemistry Letters. ISSN 1610-3653. Vol.9 (2011), p.169–176por
dc.identifier.doi10.1007/s10311-009-0258-2
dc.identifier.eissn1610-3661
dc.identifier.issn1610-3653
dc.identifier.urihttp://hdl.handle.net/10400.14/7488
dc.identifier.wosWOS:000291040900003
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherSpringer
dc.relationOPTIMIZAÇÃO DOS PROCESSOS ENVOLVIDOS NA REMOÇÃO DE METAIS PESADOS UTILIZANDO MICROALGAS
dc.subjectMicroalgaepor
dc.subjectHeavy metal removalpor
dc.subjectBioremediationpor
dc.subjectInactivated cellspor
dc.subjectpHpor
dc.subjectLangmuir isothermpor
dc.titleBiosorption of zinc ions from aqueous solution by the microalga Scenedesmus obliquuspor
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleOPTIMIZAÇÃO DOS PROCESSOS ENVOLVIDOS NA REMOÇÃO DE METAIS PESADOS UTILIZANDO MICROALGAS
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F9332%2F2002/PT
oaire.citation.endPage176
oaire.citation.issue2
oaire.citation.startPage169
oaire.citation.titleEnvironmental Chemistry Letters
oaire.citation.volume9
person.familyNameMonteiro
person.familyNameCastro
person.familyNameMalcata
person.givenNameCristina
person.givenNamePaula
person.givenNameFrancisco
person.identifier2013444
person.identifier.ciencia-id691A-CDC0-2C9B
person.identifier.ciencia-id7C1F-6C72-354A
person.identifier.ciencia-id1B13-38A5-35F5
person.identifier.orcid0000-0002-5668-8153
person.identifier.orcid0000-0001-8841-6606
person.identifier.orcid0000-0003-3073-1659
person.identifier.ridM-8241-2013
person.identifier.scopus-author-id26029962100
person.identifier.scopus-author-id7102781782
person.identifier.scopus-author-id7102542478
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
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relation.isAuthorOfPublicationf2253992-dc8d-4042-9a0f-597ebcf0a1d6
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