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Evaluating the effectiveness of nanotechnology in environmental remediation of a highly metal-contaminated area—Minas Gerais, Brazil

2022Journal article Open access
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dc.contributor.authorFonseca, Rita
dc.contributor.authorAraújo, Joana
dc.contributor.authorPinho, Ana Catarina
dc.contributor.authorAlbuquerque, M.T.D.
dc.date.accessioned2022-08-01T08:47:38Z
dc.date.available2022-08-01T08:47:38Z
dc.date.issued2022
dc.description.abstractA column experiment at a laboratory level was carried out to assess the effect of the application of nanotechnology in the decontamination of soils and alluvial deposits with high levels of potentially toxic elements (PTEs). A suspension of zero-valent iron nanoparticles (nZVI) was injected at three different concentrations in selected samples (two sediments, one soil). For most of the elements, the retention by nZVI was proportional to the concentration of the suspension and the trend was similar. Metals were immobilized by adsorption on the surface layer of the nanoparticles and/or by complexation, co-precipitation, and chemical reduction. By day 60 following injection, the nZVI lost reactivity and the retained species were desorbed and back into the soluble phase. The definition of spatial patterns for PTEs’ distribution allowed for the construction of contamination risk maps using a geostatistical simulation approach. The analysis obtained from the extractable contents of five target elements (Zn, Cu, Cd, Pb, As) was cross-checked with the estimated map network to assess their retention efficiency. Data from the analysis of these elements, in the extractable phase and in the porewater of the sediments/soils, indicate the nZVI injection as a suitable technique for reducing the risk level of PTEs in contaminated Fe-rich tropical environments.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationFONSECA, Rita [et al.] (20229 _ Evaluating the effectiveness of nanotechnology in environmental remediation of a highly metal-contaminated area—Minas Gerais, Brazil. Geosciences. Vol. 12:8, p.287. DOI 10.3390/geosciences12080287
dc.identifier.doi10.3390/geosciences12080287pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.11/8057
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relationProject FCT—UIDB/04674/2020pt_PT
dc.subjectmetal contaminantspt_PT
dc.subjectnanoparticles of zero-valent ironpt_PT
dc.subjectlaboratory scale experimentpt_PT
dc.subjectmetals adsorptionpt_PT
dc.subjectsequential gaussian simulationpt_PT
dc.titleEvaluating the effectiveness of nanotechnology in environmental remediation of a highly metal-contaminated area—Minas Gerais, Brazilpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue8pt_PT
oaire.citation.startPage287pt_PT
oaire.citation.titleGeosciencespt_PT
oaire.citation.volume12pt_PT
person.familyNameFerreira da Fonseca Ventura Araújo
person.familyNamePinho
person.familyNameAlbuquerque
person.givenNameJoana
person.givenNameAna Catarina
person.givenNameMaria Teresa
person.identifierhttps://www.researchgate.net/profile/Joana_Araujo16/info
person.identifier.ciencia-id2617-7BC7-DE98
person.identifier.ciencia-idA615-769B-9C33
person.identifier.ciencia-id5A1C-8956-4C0A
person.identifier.orcid0000-0003-4956-4061
person.identifier.orcid0000-0002-0511-3165
person.identifier.orcid0000-0002-8782-6133
person.identifier.ridB-1536-2013
person.identifier.scopus-author-id55507421600
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication851c087c-ffbf-41df-9ed0-ff898e42cb7a
relation.isAuthorOfPublicationdc0639e8-1085-4e9e-9839-cf689364ff20
relation.isAuthorOfPublicatione2c2d171-e148-4c23-9cf8-0eb6d810c15e
relation.isAuthorOfPublication.latestForDiscovery851c087c-ffbf-41df-9ed0-ff898e42cb7a

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