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

Hudson-Edwards, K. A., Byrne, P., Bird, G., Brewer, P. A., Burke, I. T., Jamieson, H. E., Macklin, M. G. and Williams, R. D. (2019) Origin and fate of Vanadium in the Hazeltine Creek Catchment following the 2014 Mount Polley mine tailings spill, British Columbia, Canada. Environmental Science and Technology, 53, pp. 4088-4098. (doi: 10.1021/acs.est.8b06391) (PMID:30829475)

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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:Articles
Additional Information:This research was funded by the UK Natural Environment Research Council (grant NE/M017486/1).
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Williams, Dr Richard
Authors: Hudson-Edwards, K. A., Byrne, P., Bird, G., Brewer, P. A., Burke, I. T., Jamieson, H. E., Macklin, M. G., and Williams, R. D.
College/School:College of Science and Engineering > School of Geographical and Earth Sciences
Journal Name:Environmental Science and Technology
Publisher:American Chemical Society
ISSN:0013-936X
ISSN (Online):1520-5851
Published Online:04 March 2019
Copyright Holders:Copyright © 2019 American Chemical Society
First Published:First published in Environmental Science and Technology 53:4088-4098
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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