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Electron microscopy of heavy metal waste in cement matrices

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Abstract

Ordinary Portland cements mixed with various amounts of chromium metal in the form of nitrates (Cr(NO3)3), to simulate industrial waste, have been studied by electron microscopy techniques, i.e. scanning electron and scanning transmission electron microscopy. Trivalent chromium was found to be chemically incorporated in all hydrated cement phases, and appeared to substitute for silicon in calcium silicate hydrate (C-S-H), which is the major product of hydration. Chromium was also concentrated in polycrystalline Ca-Cr-rich phases.

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Authors and Affiliations

  1. Department of Mining, Metallurgical and Petroleum Engineering, University of Alberta, T69 2G6, Edmonton, Alberta, Canada

    D. G. Ivey & R. B. Heimann

  2. Materials and Testing Department, Alberta Research Council, T6H 5X2, Edmonton, Alberta, Canada

    R. B. Heimann

  3. Alberta Environmental Centre, TOB 4LO, Vegreville, Alberta, Canada

    M. Neuwirth, S. Shumborski & D. Conrad

  4. Fuel Processing Laboratory, Energy, Mines and Resources, Canada, CANMET, TOC 1EO, Devon, Alberta, Canada

    R. J. Mikula & W. W. Lam

Authors
  1. D. G. Ivey
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  2. R. B. Heimann
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  3. M. Neuwirth
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  4. S. Shumborski
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  5. D. Conrad
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  6. R. J. Mikula
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  7. W. W. Lam
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Ivey, D.G., Heimann, R.B., Neuwirth, M. et al. Electron microscopy of heavy metal waste in cement matrices. J Mater Sci 25, 5055–5062 (1990). https://doi.org/10.1007/BF00580129

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  • DOI: https://doi.org/10.1007/BF00580129

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