Authors: Bruhns, Petra; Fischer, Reinhard X.

Source: European Journal of Mineralogy, Volume 13, Number 3, 1 May 2001 , pp. 611-619(9)

Publisher: E. Schweizerbart'sche Verlagsbuchhandlung

Abstract:

The phase reactions of V-doped clays in brick burning processes are studied to evaluate the utilization of V-containing wastes in brickworks. V₂O₅ was admixed to clay and annealed at temperatures between 200 and 1000 °C. The formation of mullite, cristobalite, and a pseudobrookite compound is observed between 700 and 800 °C. These phases do not occur in pure clay annealed in the corresponding temperature range. The samples were investigated with X-ray powder diffraction methods, quantitative analyses were performed with the Rietveld method and chemical analyses with X-ray fluorescence spectroscopy. Analytical Transmission Electron Microscopy showed incorporation of vanadium and iron in mullite.

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Keywords: BRICK BURNING; HEAVY METAL CONTAMINATED WASTE; VANADIUM; CRISTOBALITE; MULLITE; X-RAY POWDER DIFFRACTION; XRD; RIETVELD ANALYSIS; ANALYTICAL TRANSMISSION ELECTRON MICROSCOPY; ATEM

Document Type: Research article

DOI: http://dx.doi.org/10.1127/0935-1221/2001/0013-0611

Publication date: 2001-05-01

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