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Recovery of gold(0) nanoparticles from aqueous solutions using effluents from a bioremediation process

2016Journal article Open access
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dc.contributor.authorAssunção, Ana
dc.contributor.authorVieira, Bernardete
dc.contributor.authorLourenço, J. P.
dc.contributor.authorCosta, Maria Clara
dc.date.accessioned2017-01-05T11:09:38Z
dc.date.available2017-01-05T11:09:38Z
dc.date.issued2016
dc.description.abstractThe use of biological processes with the aim of the recovery of gold from low-concentration solutions derived from leaching of secondary sources is gaining increasing importance owing to the scarcity of the primary resources and the economic and environmental advantages usually presented by these methods. Thus, the addition in batch and continuous processes of different solutions containing biogenic sulphide, which was generated by the activity of sulphate-reducing bacteria (SRB), to gold(III) solutions was investigated for that purpose. In the batch experiments, AuS nanoparticles with sizes of between 6 and 14 nm were obtained (corresponding to 100% removal of Au(III) from solution) if the biogenic sulphide was generated in a typical nutrient medium for SRB, whereas Au(0) nanoparticles with sizes of below 8 nm were obtained (corresponding to 62% removal of Au(III)) if effluent from a SRB bioremediation process for treating acid mine drainage (AMD) was used instead. These results stimulated the development of a continuous process of addition, in which two sulphide-rich effluents, which resulted from a SRB bioremediation process for treating two types of AMD (from a uranium mine and a polysulphide mine), were tested. In both cases, Au(0) nanoparticles with sizes of between 6 and 15 nm were mainly obtained, and the percentage removal of Au(III) from solution ranged from 76% to 100%. The processes described allow the simultaneous treatment of AMD and recovery of metallic gold nanoparticles, which are a product with a wide range of applications (e.g., in medicine, optical devices and catalysis) and high economic value. The synthesis process described in this work can be considered as novel, because it is the first time, to our knowledge, that the use of effluent from a SRB bioremediation process has been reported for the recovery of gold(III) as gold(0) nanoparticles.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doihttp://dx.doi.org/10.1039/c6ra24503jpt_PT
dc.identifier.otherAUT: JLO01215;
dc.identifier.urihttp://hdl.handle.net/10400.1/8916
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherRoyal Society of Chemistrypt_PT
dc.relationCentro de Química Estrutural
dc.relation.publisherversionhttp://pubs.rsc.org/en/results?artrefjournalname=rsc%20adv.&artrefstartpage=112784&artrefvolumeyear=2016&fcategory=journalpt_PT
dc.subjectGold nanoparticlespt_PT
dc.subjectbioremediationpt_PT
dc.subjectAcid Mine Drainagept_PT
dc.subjectSulphateReducing Bacteriapt_PT
dc.titleRecovery of gold(0) nanoparticles from aqueous solutions using effluents from a bioremediation processpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCentro de Química Estrutural
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBD%2F77093%2F2011/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMulti%2F04326%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FAAG-TEC%2F2721%2F2012/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FQUI%2F00100%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FQUI%2F00100%2F2013/PT
oaire.citation.endPage112794pt_PT
oaire.citation.startPage112784pt_PT
oaire.citation.titleRSC Advancespt_PT
oaire.citation.volume6pt_PT
oaire.fundingStreamSFRH
oaire.fundingStream5876
oaire.fundingStream3599-PPCDT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream5876
person.familyNameAssunção
person.familyNameVieira
person.familyNameLourenço
person.familyNameCosta
person.givenNameAna
person.givenNameBernardete
person.givenNameJoão P.
person.givenNameMaria Clara
person.identifier634248
person.identifier.ciencia-idF81F-A1F0-2A7C
person.identifier.ciencia-id7110-A28E-3C8A
person.identifier.orcid0000-0002-2519-2817
person.identifier.orcid0000-0002-6284-006X
person.identifier.orcid0000-0002-0501-6672
person.identifier.orcid0000-0003-1340-5237
person.identifier.ridA-7758-2008
person.identifier.ridM-6189-2013
person.identifier.scopus-author-id18036433200
person.identifier.scopus-author-id57195730600
person.identifier.scopus-author-id35354952400
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
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
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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