Incorporation and leaching of heavy metals in clay annealed with Pb, Cu and V
2001 | journal article
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- Authors
- Karius, Volker ; Bruhns, Petra; Hamer, Kay; Fischer, Reinhard
- Abstract
- The leaching characteristics of annealed clay enriched with heavy metals (5 wt% PbO, CuO, V2O5) were compared with the mineral phase composition. X-ray powder diffraction analyses of the products at different annealing temperatures (up to 1,000 °C) revealed that Pb is incorporated in a lead feldspar whereas Cu and V are mainly incorporated in the amorphous component. The phases incorporating Pb, Cu or V were investigated by thermodynamic calculations to confirm consistency to the observed solubility behaviour in pH-static experiments at pH 4, 7 and 11. Mobilization data indicate that Pb and Cu are sufficiently immobilized during annealing processes whereas the high mobility of V strongly depends on the annealing temperature.
- Issue Date
- 2001
- Journal
- Environmental Geology
- ISSN
- 0943-0105; 1432-0495
- Language
- English