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Modelling growth of, and removal of Zn and Hg by a wild microalgal consortium

2012Journal article Restricted access
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dc.contributor.authorMonteiro, Cristina M.
dc.contributor.authorBrandão, Teresa R. S.
dc.contributor.authorCastro, Paula M. L.
dc.contributor.authorMalcata, F. Xavier
dc.date.accessioned2012-01-16T17:52:36Z
dc.date.available2012-01-16T17:52:36Z
dc.date.issued2012
dc.description.abstractMicroorganisms isolated from sites contaminated with heavy metals usually possess a higher removal capacity than strains from regular cultures. Heavy metal-containing soil samples from an industrial dumpsite in Northern Portugal were accordingly collected; following enrichment under metal stress, a consortium of wild microalgae was obtained. Their ability to grow in the presence of, and their capacity to recover heavy metals was comprehensively studied; the datasets thus generated were fitted to by a combined model of biomass growth and metal uptake, derived from first principles. After exposure to 15 and 25 mg/L Zn2+ for 6 days, the microalgal consortium reached similar, or higher cell density than the control; however, under 50 and 65 mg/L Zn2+, 71% to 84% inhibition was observed. Growth in the presence of Hg2+ was significantly inhibited, even at a concentration as low as 25 μg/L, and 90% inhibition was observed above 100 μg/L. The maximum amount of Zn2+ removed was 21.3 mg/L, upon exposure to 25 mg/L for 6 day, whereas the maximum removal of Hg2+ was 335 μg/L, upon 6 day in the presence of 350 ug/L. The aforementioned mechanistic model was built upon Monod assumptions (including heavy metal inhibition), coupled with Leudeking–Piret relationships between the rates of biomass growth and metal removal. The overall fits were good under all experimental conditions tested, thus conveying a useful tool for rational optimisation of microalga-mediated bioremediation.por
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.citationMONTEIRO, Cristina M... [et al.] - Modelling growth of, and removal of Zn and Hg by a wild microalgal consortium. Applied Microbiology and Biotechnology. ISSN 1432-0614. (2012). 94(1). 91-100por
dc.identifier.doi10.1007/s00253-011-3826-x
dc.identifier.eissn1432-0614
dc.identifier.issn0175-7598
dc.identifier.urihttp://hdl.handle.net/10400.14/7484
dc.identifier.wosWOS:000301747500009
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherSpringerpor
dc.relationOPTIMIZAÇÃO DOS PROCESSOS ENVOLVIDOS NA REMOÇÃO DE METAIS PESADOS UTILIZANDO MICROALGAS
dc.relationMICROPHYTE: Metabolic engIneering of Chlamydomonas and enviRonmental OPtimization for HYdrogen producTion and rElease
dc.subjectHeavy metalspor
dc.subjectMetal uptakepor
dc.subjectToxicitypor
dc.subjectBioremediationpor
dc.subjectMonod modelpor
dc.subjectLeudeking–Piret modelpor
dc.titleModelling growth of, and removal of Zn and Hg by a wild microalgal consortiumpor
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleOPTIMIZAÇÃO DOS PROCESSOS ENVOLVIDOS NA REMOÇÃO DE METAIS PESADOS UTILIZANDO MICROALGAS
oaire.awardTitleMICROPHYTE: Metabolic engIneering of Chlamydomonas and enviRonmental OPtimization for HYdrogen producTion and rElease
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F9332%2F2002/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FEBB-EBI%2F102728%2F2008/PT
oaire.citation.endPage100
oaire.citation.issue1
oaire.citation.startPage91
oaire.citation.titleApplied Microbiology and Biotechnology
oaire.citation.volume94
oaire.fundingStream3599-PPCDT
person.familyNameMonteiro
person.familyNameBrandão
person.familyNameCastro
person.familyNameMalcata
person.givenNameCristina
person.givenNameTeresa
person.givenNamePaula
person.givenNameFrancisco
person.identifierJ-9418-2012
person.identifier2013444
person.identifier.ciencia-id691A-CDC0-2C9B
person.identifier.ciencia-id7B19-E23B-BB31
person.identifier.ciencia-id7C1F-6C72-354A
person.identifier.ciencia-id1B13-38A5-35F5
person.identifier.orcid0000-0002-5668-8153
person.identifier.orcid0000-0002-8857-6471
person.identifier.orcid0000-0001-8841-6606
person.identifier.orcid0000-0003-3073-1659
person.identifier.ridJ-9418-2012
person.identifier.ridM-8241-2013
person.identifier.scopus-author-id26029962100
person.identifier.scopus-author-id6602174128
person.identifier.scopus-author-id7102781782
person.identifier.scopus-author-id7102542478
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.rightsrestrictedAccesspor
rcaap.typearticlepor
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