Show simple item record

dc.contributor.authorBennett, William W
dc.contributor.authorHockmann, Kerstin
dc.contributor.authorJohnston, Scott G
dc.contributor.authorBurton, Edward D
dc.date.accessioned2018-04-04T01:49:43Z
dc.date.available2018-04-04T01:49:43Z
dc.date.issued2017
dc.identifier.issn1448-2517
dc.identifier.doi10.1071/EN16198
dc.identifier.urihttp://hdl.handle.net/10072/372839
dc.description.abstractThe biogeochemistry of antimony (Sb) in wetland sediments is poorly characterised, despite their importance as contaminant sinks. The organic-rich, reducing nature of wetland sediments may facilitate sequestration mechanisms that are not typically present in oxic soils, where the majority of research to date has taken place. Using X-ray absorption spectroscopy (XAS), we present evidence of antimony speciation being dominated by secondary antimony–sulfur phases in a wetland sediment. Our results demonstrate that, by incorporating a newly developed SbIII–organic sulfur reference standard, linear combination fitting analysis of antimony K-edge XAS spectra and robust statistical assessment of fit quality allows the reliable discrimination of SbIII coordination environments. We found that a contaminated wetland sediment in New South Wales, Australia, contained 57 % of the total antimony as SbIII–phases, with 44 % present as a highly-disordered antimony phase, likely consisting of SbIII complexed by organic sulfur (e.g. thiols) or an amorphous SbIII sulfide (e.g. SbS3). The methodological approach outlined in this study and our identification of the importance of reduced sulfur in sequestering antimony has implications for future research in the area of antimony biogeochemistry, and for the management of both natural and artificial wetlands contaminated with antimony.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherCSIRO Publishing
dc.relation.ispartofpagefrom345
dc.relation.ispartofpageto349
dc.relation.ispartofissue6
dc.relation.ispartofjournalEnvironmental Chemistry
dc.relation.ispartofvolume14
dc.relation.grantIDDE140100056
dc.subject.fieldofresearchChemical sciences
dc.subject.fieldofresearchOther chemical sciences not elsewhere classified
dc.subject.fieldofresearchEarth sciences
dc.subject.fieldofresearchEnvironmental sciences
dc.subject.fieldofresearchcode34
dc.subject.fieldofresearchcode349999
dc.subject.fieldofresearchcode37
dc.subject.fieldofresearchcode41
dc.titleSynchrotron X-ray absorption spectroscopy reveals antimony sequestration by reduced sulfur in a freshwater wetland sediment
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dcterms.licensehttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.description.versionVersion of Record (VoR)
gro.facultyGriffith Sciences, Griffith School of Environment
gro.rights.copyright© CSIRO 2017. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International (CC BY-NC-ND 4.0) License (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
gro.hasfulltextFull Text
gro.griffith.authorBennett, Will W.


Files in this item

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record