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Origin and fate of Vanadium in the Hazeltine Creek Catchment following the 2014 Mount Polley mine tailings spill, British Columbia, Canada

Hudson-Edwards, KA, Byrne, PA, Bird, G, Brewer, PA, Burke, IT, Jamieson, HE, Macklin, MG and Williams, RD (2019) Origin and fate of Vanadium in the Hazeltine Creek Catchment following the 2014 Mount Polley mine tailings spill, British Columbia, Canada. Environmental Science & Technology. ISSN 1520-5851

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2019 Hudson-Edwards et al. (Origin and fate of Vanadium in the Hazeltine Creek Catchment following the 2014 Mount Polley mine tailings spill, British Columbia, Canada).pdf - Accepted Version
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Abstract

Results are presented from the analysis of aqueous and solid-phase V speciation within samples collected from the Hazeltine Creek catchment affected by the August 2014 Mount Polley mine tailings dam failure, Canada. Electron microprobe and XANES analysis found that V is present as V3+ substituted into magnetite, and V3+ and V4+ substituted into titanite, both of which occur in the spilled Mount Polley tailings. Secondary Fe oxyhydroxides forming in inflow waters and on creek beds have V K-edge XANES spectra exhibiting E½ positions and pre-edge features consistent with the presence of V5+ species, suggesting sorption of this species on these secondary phases. PHREEQC modelling suggests that the stream waters mostly contain V5+, and the inflow and pore waters contain a mixture of V3+ and V5+. These data, and stream, inflow and pore water chemical data, suggest that dissolution of V(III)-bearing magnetite, V(III,IV)-bearing titanite, V(V)-bearing Fe(-Al-Si-Mn) oxhydroxides, V-bearing Al(OH)3 and/or -clay minerals may have occurred. In the circumneutral pH environment of Hazeltine Creek elevated V concentrations are likely naturally attenuated by formation of V(V)-bearing secondary Fe oxyhydroxide, Al(OH)3 or clay mineral colloids, suggesting that the V is not bioavailable. A conceptual model is presented describing the origin and fate of V in Hazeltine Creek that is applicable to other river systems.

Item Type: Article
Uncontrolled Keywords: MD Multidisciplinary
Subjects: Q Science > QD Chemistry
T Technology > TN Mining engineering. Metallurgy
Divisions: Natural Sciences and Psychology
Publisher: American Chemical Society
Date Deposited: 11 Mar 2019 12:25
Last Modified: 11 Mar 2019 12:29
DOI or Identification number: 10.1021/acs.est.8b06391
URI: http://researchonline.ljmu.ac.uk/id/eprint/10288

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