dc.contributor.author
Delina, Ruth Esther G.
dc.contributor.author
Perez, Jeffrey Paulo H.
dc.contributor.author
Stammeier, Jessica A.
dc.contributor.author
Bazarkina, Elena F.
dc.contributor.author
Benning, Liane G.
dc.date.accessioned
2024-05-06T09:20:59Z
dc.date.available
2024-05-06T09:20:59Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/43434
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-43151
dc.description.abstract
Chromium (Cr) leached from iron (Fe) (oxyhydr)oxide-rich tropical laterites can substantially impact downstream groundwater, ecosystems, and human health. However, its partitioning into mineral hosts, its binding, oxidation state, and potential release are poorly defined. This is in part due to the current lack of well-designed and validated Cr-specific sequential extraction procedures (SEPs) for laterites. To fill this gap, we have (i) first optimized a Cr SEP for Fe (oxyhydr)oxide-rich laterites using synthetic and natural Cr-bearing minerals and laterite references, (ii) used a complementary suite of techniques and critically evaluated existing non-laterite and non-Cr-optimized SEPs, compared to our optimized SEP, and (iii) confirmed the efficiency of our new SEP through analyses of laterites from the Philippines. Our results show that other SEPs inadequately leach Cr host phases and underestimate the Cr fractions. Our SEP recovered up to seven times higher Cr contents because it (a) more efficiently dissolves metal-substituted Fe phases, (b) quantitatively extracts adsorbed Cr, and (c) prevents overestimation of organic Cr in laterites. With this new SEP, we can estimate the mineral-specific Cr fractionation in Fe-rich tropical soils more quantitatively and thus improve our knowledge of the potential environmental impacts of Cr from lateritic areas.
en
dc.format.extent
11 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by/4.0/
dc.subject
iron (oxyhydr)oxides
en
dc.subject
metal substitution
en
dc.subject
mineralsynthesis
en
dc.subject
nickellaterite
en
dc.subject
SEP optimization
en
dc.subject
SEP validation
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften
dc.title
Partitioning and Mobility of Chromium in Iron-Rich Laterites from an Optimized Sequential Extraction Procedure
dc.type
Wissenschaftlicher Artikel
dc.date.updated
2024-04-26T23:06:56Z
dcterms.bibliographicCitation.doi
10.1021/acs.est.3c10774
dcterms.bibliographicCitation.journaltitle
Environmental Science & Technology
dcterms.bibliographicCitation.number
14
dcterms.bibliographicCitation.originalpublishername
American Chemical Society
dcterms.bibliographicCitation.pagestart
6391
dcterms.bibliographicCitation.pageend
6401
dcterms.bibliographicCitation.volume
58
dcterms.bibliographicCitation.url
https://doi.org/10.1021/acs.est.3c10774
refubium.affiliation
Geowissenschaften
refubium.affiliation.other
Institut für Geologische Wissenschaften / Fachrichtung Geochemie, Hydrogeologie, Mineralogie

refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.issn
0013-936X
dcterms.isPartOf.eissn
1520-5851
refubium.resourceType.provider
DeepGreen