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dc.contributor.authorBennett, William W
dc.contributor.authorArsic, Maja
dc.contributor.authorWelsh, David T
dc.contributor.authorTeasdale, Peter R
dc.date.accessioned2017-12-21T01:33:56Z
dc.date.available2017-12-21T01:33:56Z
dc.date.issued2016
dc.identifier.issn2050-7887
dc.identifier.doi10.1039/c6em00189k
dc.identifier.urihttp://hdl.handle.net/10072/142861
dc.description.abstractAntimony is a priority environmental contaminant typically present as either the trivalent (SbIII) or the pentavalent (SbV) oxidation state in aquatic systems. Both the toxicity and mobility of antimony are affected by its speciation, and thus the accurate measurement of antimony speciation is essential for investigating the behaviour of this contaminant in aquatic systems. Here we present a diffusive gradients in thin films (DGT) technique, which utilises a binding layer containing a thiol-based adsorbent (3-mercaptopropyl functionalised silica gel), for the selective measurement of SbIII in surface waters and sediment porewaters. We also evaluated the Metsorb DGT technique, which has been previously reported to accurately measure SbV, for its ability to accumulate SbIII and thus allow the measurement of total inorganic antimony. Both the mercapto-silica and Metsorb DGT techniques showed a high affinity for SbIII, with uptake efficiencies >97%. Elution efficiencies of 86.9 ± 2.6% and 88.1 ± 1.2% were obtained for mercapto-silica and Metsorb, respectively, with 1 mol L−1 H2O2 in 1 mol L−1 NaOH. The accumulation of SbIII by these DGT techniques was linear with time (R2 > 0.99) and unaffected by pH (4.07–8.05), ionic strength (0.001–1.0 mol L−1 NaCl), bicarbonate (1–15 mmol L−1), and an artificial seawater matrix (pH 8.34; salinity 34.8). Finally, the mercapto-silica DGT technique was applied to measure porewater concentrations of SbIII and AsIII in a contaminated freshwater sediment at high resolution.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherRoyal Society of Chemistry
dc.relation.ispartofpagefrom992
dc.relation.ispartofpageto998
dc.relation.ispartofissue8
dc.relation.ispartofjournalEnvironmental Sciences: Processes and Impacts
dc.relation.ispartofvolume18
dc.relation.grantIDDE140100056
dc.subject.fieldofresearchEnvironmental Sciences not elsewhere classified
dc.subject.fieldofresearchChemical Sciences
dc.subject.fieldofresearchEnvironmental Sciences
dc.subject.fieldofresearchMedical and Health Sciences
dc.subject.fieldofresearchcode059999
dc.subject.fieldofresearchcode03
dc.subject.fieldofresearchcode05
dc.subject.fieldofresearchcode11
dc.titleIn situ speciation of dissolved inorganic antimony in surface waters and sediment porewaters: development of a thiol-based diffusive gradients in thin films technique for SbIII
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dc.description.versionAccepted Manuscript (AM)
gro.facultyGriffith Sciences, Griffith School of Environment
gro.rights.copyright© 2016 Royal Society of Chemistry. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal website for access to the definitive, published version.
gro.hasfulltextFull Text
gro.griffith.authorTeasdale, Peter R.
gro.griffith.authorWelsh, David T.
gro.griffith.authorBennett, Will W.
gro.griffith.authorArsic, Maja


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