Repository logo
 
Publication

Isolation and purification treatments change the metal-binding properties of humic acids: effect of HF/HCl treatment

2017Journal article Restricted access
Simple item page
dc.contributor.authorBotero, Wander G.
dc.contributor.authorPineau, Michael
dc.contributor.authorJanot, Noemie
dc.contributor.authorDomingos, Rute F.
dc.contributor.authorMariano, José
dc.contributor.authorRocha, Luciana S.
dc.contributor.authorGroenenberg, Jan E.
dc.contributor.authorBenedetti, Marc F.
dc.contributor.authorPinheiro, Jose P.
dc.date.accessioned2019-11-20T15:07:58Z
dc.date.available2019-11-20T15:07:58Z
dc.date.issued2017
dc.description.abstractEnvironmental contextStudying the mechanism of binding between metals and natural organic matter is fundamental to understanding the transport and availability of these contaminants in the environment. The influence of sample treatment on the purification of organic matter showed significant differences in the interaction with metals. The results will contribute to improved modelling of metal binding to organic matter in soils, thereby providing a basis for a more realistic risk assessment. AbstractWe studied the changes in metal binding characteristics of extracted humic acids induced by HF/HCl treatment followed by dialysis, i.e. the last step of the International Humic Substances Society (IHSS) extraction protocol. We performed metal binding experiments with both the alkaline-extracted material (AE) and the fully purified (FP) humic acid using the electrochemical stripping technique (AGNES) and modelled the results using the NICA-Donnan model. The results showed an increase of free Zn, Cd and Pb concentrations of similar to 1 order of magnitude for the AE compared with the FP. These differences may be mostly explained by the different carbon content (51.3% FP and 36.5% AE) associated with an AE/FP carboxyl ratio of 0.5. Simulations using the NICA-Donnan model showed that halving the amount of carboxylic groups (Q(max,1)) for the FP reduced this difference to 0.25 log units for Cd and Zn and to 0.15 log unit for Pb. There is a clear need for further research on the differences between purified v. less-disturbed natural organic material, which will contribute to improved modelling of metal binding to organic matter in soils, hence providing a basis for a more realistic risk assessment.
dc.description.sponsorshipCoordenadoria de Aperfeicoamento do Pessoal de Nivel Superior (CAPES CSF) [981313-6]
dc.description.sponsorshipConselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq PVE) [400572/2013-3]
dc.description.sponsorshipFrench national research agency (ANR) [ANR-10-LABX-21-01/LABEX RESSOURCES 21]
dc.description.sponsorshipPortuguese national funding agency for science, research and technology [FCT-ANR/AAG-MAA/0065/2012]
dc.description.sponsorshipRegion Lorraine
dc.identifier.doi10.1071/EN17129
dc.identifier.issn1448-2517
dc.identifier.issn1449-8979
dc.identifier.urihttp://hdl.handle.net/10400.1/13293
dc.language.isoeng
dc.peerreviewedyes
dc.publisherCsiro Publishing
dc.relationIn situ trace metal speciation monitoring
dc.subjectDonnan model parameters
dc.subjectOrganic-matter
dc.subjectIon-binding
dc.subjectBase properties
dc.subjectProton binding
dc.subjectSandy Soil
dc.subjectSubstances
dc.subjectSpeciation
dc.subjectCu
dc.subjectComplexation
dc.titleIsolation and purification treatments change the metal-binding properties of humic acids: effect of HF/HCl treatment
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleIn situ trace metal speciation monitoring
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/FCT-ANR%2FAAG-MAA%2F0065%2F2012/PT
oaire.citation.endPage424
oaire.citation.issue7
oaire.citation.startPage417
oaire.citation.titleEnvironmental Chemistry
oaire.citation.volume14
oaire.fundingStream3599-PPCDT
person.familyNameMariano
person.familyNameRocha
person.givenNameJosé
person.givenNameLuciana
person.identifier.ciencia-idDE19-7D9D-00D0
person.identifier.ciencia-id9415-9C14-C4CD
person.identifier.orcid0000-0002-8480-617X
person.identifier.orcid0000-0002-5469-0911
person.identifier.ridO-5252-2018
person.identifier.ridM-2566-2013
person.identifier.scopus-author-id12647832000
person.identifier.scopus-author-id8041532300
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublication16ee0cfc-3dd4-40fa-8401-b435aa41ef7d
relation.isAuthorOfPublicatione6ba3128-9b58-449e-a710-d124f6b8b65d
relation.isAuthorOfPublication.latestForDiscoverye6ba3128-9b58-449e-a710-d124f6b8b65d
relation.isProjectOfPublication9ec89379-1df9-4a4f-aadd-b519804773eb
relation.isProjectOfPublication.latestForDiscovery9ec89379-1df9-4a4f-aadd-b519804773eb

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
13293.pdf
Size:
743.83 KB
Format:
Adobe Portable Document Format
Download

Collections

FCT2-Artigos (em revistas ou actas indexadas)