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In situ arsenic oxidation and sorption by a Fe-Mn binary oxide waste in soil

McCann, Clare M.; Peacock, Caroline L.; Hudson-Edwards, Karen A.; Shrimpton, Thomas; Gray, Neil D.; Johnson, Karen L.

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Clare M. McCann

Caroline L. Peacock

Karen A. Hudson-Edwards

Thomas Shrimpton

Neil D. Gray


The ability of a Fe-Mn binary oxide waste to adsorb arsenic (As) in a historically contaminated soil was investigated. Initial laboratory sorption experiments indicated that arsenite [As(III)] was oxidized to arsenate [As(V)] by the Mn oxide component, with concurrent As(V) sorption to the Fe oxide. The binary oxide waste had As(III) and As(V) adsorption capacities of 70 mg g−1 and 32 mg g−1 respectively. X-ray Absorption Near-Edge Structure and Extended X-ray Absorption Fine Structure at the As K-edge confirmed that all binary oxide waste surface complexes were As(V) sorbed by mononuclear bidentate corner-sharing, with 2 Fe at ∼3.27 Ǻ. The ability of the waste to perform this coupled oxidation-sorption reaction in real soils was investigated with a 10% by weight addition of the waste to an industrially As contaminated soil. Electron probe microanalysis showed As accumulation onto the Fe oxide component of the binary oxide waste, which had no As innately. The bioaccessibility of As was also significantly reduced by 7.80% (p < 0.01) with binary oxide waste addition. The results indicate that Fe-Mn binary oxide wastes could provide a potential in situ remediation strategy for As and Pb immobilization in contaminated soils.


McCann, C. M., Peacock, C. L., Hudson-Edwards, K. A., Shrimpton, T., Gray, N. D., & Johnson, K. L. (2018). In situ arsenic oxidation and sorption by a Fe-Mn binary oxide waste in soil. Journal of Hazardous Materials, 342, 724-731.

Journal Article Type Article
Acceptance Date Aug 23, 2017
Online Publication Date Aug 30, 2017
Publication Date Jan 15, 2018
Deposit Date Sep 1, 2017
Publicly Available Date Aug 30, 2018
Journal Journal of Hazardous Materials
Print ISSN 0304-3894
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 342
Pages 724-731


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