Antimony leaching and chemical species analyses in an industrial solid waste: surface and bulk speciation using ToF-SIMS and XANES

P. Kappen, G. Ferrando-Miguel, S. M. Reichman, L. Innes, E. Welter, P. J. Pigram

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The surface chemistry and bulk chemical speciation of solid industrial wastes containing 8 wt-% antimony (Sb) were investigated using synchrotron X-ray Absorption Near Edge Structure (XANES) and Time-of-Flight Ion Secondary Mass Spectrometry (ToF-SIMS). Leaching experiments were conducted in order to better understand the behavior of Sb in waste streams and to inform regulatory management of antimony-containing wastes. The experiments also demonstrate how a combination of XANES and ToF-SIMS adds value to the field of waste investigations. Leaching treatments (acid and base) were performed at a synchrotron over 24 h time periods. Surface analyses of the wastes before leaching showed the presence of Sb associated with S and O. Bulk analyses revealed Sb to be present, primarily, as trivalent sulfide species. Both acid and base leaching did not change the antimony speciation on the solid. Leaching transferred about 1% of the total Sb into solution where Sb was found to be present as Sb(V). XANES data showed similarities between leachate and FeSbO4. During base leaching, the Sb content in solution gradually increased over time, and potential desorption mechanisms are discussed.

Original languageEnglish
Pages (from-to)131-140
Number of pages10
JournalJournal of Hazardous Materials
Volume329
DOIs
Publication statusPublished - 1 Jan 2017

Keywords

  • Antimony
  • Industrial waste
  • Synchrotron
  • ToF-SIMS
  • XANES

Cite this

Kappen, P. ; Ferrando-Miguel, G. ; Reichman, S. M. ; Innes, L. ; Welter, E. ; Pigram, P. J. / Antimony leaching and chemical species analyses in an industrial solid waste : surface and bulk speciation using ToF-SIMS and XANES. In: Journal of Hazardous Materials. 2017 ; Vol. 329. pp. 131-140.
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abstract = "The surface chemistry and bulk chemical speciation of solid industrial wastes containing 8 wt-{\%} antimony (Sb) were investigated using synchrotron X-ray Absorption Near Edge Structure (XANES) and Time-of-Flight Ion Secondary Mass Spectrometry (ToF-SIMS). Leaching experiments were conducted in order to better understand the behavior of Sb in waste streams and to inform regulatory management of antimony-containing wastes. The experiments also demonstrate how a combination of XANES and ToF-SIMS adds value to the field of waste investigations. Leaching treatments (acid and base) were performed at a synchrotron over 24 h time periods. Surface analyses of the wastes before leaching showed the presence of Sb associated with S and O. Bulk analyses revealed Sb to be present, primarily, as trivalent sulfide species. Both acid and base leaching did not change the antimony speciation on the solid. Leaching transferred about 1{\%} of the total Sb into solution where Sb was found to be present as Sb(V). XANES data showed similarities between leachate and FeSbO4. During base leaching, the Sb content in solution gradually increased over time, and potential desorption mechanisms are discussed.",
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Antimony leaching and chemical species analyses in an industrial solid waste : surface and bulk speciation using ToF-SIMS and XANES. / Kappen, P.; Ferrando-Miguel, G.; Reichman, S. M.; Innes, L.; Welter, E.; Pigram, P. J.

In: Journal of Hazardous Materials, Vol. 329, 01.01.2017, p. 131-140.

Research output: Contribution to journalArticleResearchpeer-review

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