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Kinetics of Two-Line Ferrihydrite Phase Transformation Under Alkaline Conditions: Effect of Temperature and Adsorbed Arsenate

  • Soumya Das
  • M. Jim Hendry
  • Joseph Essilfie-Dughan
Part of the Springer Geology book series (SPRINGERGEOL)

Abstract

The rate of two-line ferrihydrite transformation with respect to temperature and adsorbed arsenate under alkaline conditions was determined via batch experiments. The rate of transformation to either goethite or hematite increases with temperature and follows first order reaction kinetics. However, as the As/Fe ratio is increased from 0.010 to 0.018, the rate of transformation decreases by two orders of magnitude with no crystallization observed at As/Fe ratios > 0.018. These results are relevant for determining the long-term stability of two-line ferri-hydrite in tailings from U mill operations.

Keywords

Mine Tailing Ferric Oxide Sodium Arsenate Pristine Condition Adsorbed Arsenate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Soumya Das
    • 1
  • M. Jim Hendry
    • 1
  • Joseph Essilfie-Dughan
    • 1
  1. 1.Department of Geological SciencesUniversity of SaskatchewanSaskatoonCanada

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