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Ammonium citrate as enhancement for electrodialytic soil remediation and investigation of soil solution during the process

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datacite.subject.sdg11:Cidades e Comunidades Sustentáveispt_PT
dc.contributor.authorOttosen, Lisbeth M.
dc.contributor.authorFerreira, Célia
dc.contributor.authorKirkelund, Alexandra B.
dc.date.accessioned2023-07-04T13:31:47Z
dc.date.available2023-07-04T13:31:47Z
dc.date.issued2015
dc.description.abstractSeven electrodialytic experiments were conducted using ammonium citrate as enhancing agent to remediate copper and chromium-contaminated soil from a wood-preservation site. The purpose was to investigate the effect of current density (0.2, 1.0 and 1.5 mA cm2 ), concentration of enhancing agent (0.25, 0.5 and 1.0 M) and remediation times (21, 42 and 117 d) for the removal of Cu and Cr from a calcareous soil. To gain insight on metal behavior, soil solution was periodically collected using suction cups. It was seen that current densities higher than 1.0 mA cm2 did not increase removal and thus using too high current densities can be a waste of energy. Desorption rate is important and both remediation time and ammonium citrate concentration are relevant parameters. It was possible to collect soil solution samples following an adaptation of the experimental set-up to ensure continuous supply of ammonium citrate to the soil in order to keep it saturated during the remediation. Monitoring soil solution gives valuable information on the evolution of remediation and helps deciding when the soil is remediated. Final concentrations in the soil ranged from 220 to 360 mg Cu kg1 (removals: 78–86%) and 440– 590 mg Cr kg1 (removals: 35–51%), being within the 500 mg kg1 limit for a clean soil only for Cu. While further optimization is still required for Cr, the removal percentages are the highest achieved so far, for a real Cu and Cr-contaminated, calcareous soil. The results highlight EDR potential to remediate metal polluted soils at neutral to alkaline pH by choosing a good enhancement solution.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.chemosphere.2014.08.064pt_PT
dc.identifier.issn0045-6535
dc.identifier.urihttp://hdl.handle.net/10400.2/14213
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.subjectCopperpt_PT
dc.subjectChromiumpt_PT
dc.subjectTreated woodpt_PT
dc.subjectSuction cupspt_PT
dc.subjectElectrokinetic remediationpt_PT
dc.subjectContaminated soilpt_PT
dc.titleAmmonium citrate as enhancement for electrodialytic soil remediation and investigation of soil solution during the processpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage895pt_PT
oaire.citation.startPage889pt_PT
oaire.citation.titleChemospherept_PT
person.familyNameFerreira
person.givenNameCélia
person.identifier.ciencia-id931E-FBDE-2098
person.identifier.orcid0000-0002-7456-2538
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicatione30010dd-0512-4da6-a0c9-910b47f18b4f
relation.isAuthorOfPublication.latestForDiscoverye30010dd-0512-4da6-a0c9-910b47f18b4f

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