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Binding of SO2 by Synthetic Substituted Apatites

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Abstract

The reaction of SO2 with synthetic apatites was studied by TG, XRD and IR analyses at 400-1000°C. Due to an interaction of apatite with SO2, destruction of apatite and formation of CaSO4 and diphosphate up to 750°C takes place. The further calcination leads to the formation of β-Ca3(PO4)2 and a part of the SO2 bound is lost again. The amount of SO2 bound with apatite at calcination depends on the substitution ((F- ↔ OH-, PO4 3- ↔ CO3 2-, Ca2+ ↔ Mg2+) in its structure.

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Authors and Affiliations

  1. Tallinn Technical University, Ehitajate tee 5, Tallinn, 19086, Estonia

    K. Tõnsuaadu, M. Peld, V. Bender & M. Veiderma

Authors
  1. K. Tõnsuaadu
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  2. M. Peld
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  3. V. Bender
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  4. M. Veiderma
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Tõnsuaadu, K., Peld, M., Bender, V. et al. Binding of SO2 by Synthetic Substituted Apatites. Journal of Thermal Analysis and Calorimetry 56, 35–42 (1999). https://doi.org/10.1023/A:1010118905445

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  • DOI: https://doi.org/10.1023/A:1010118905445

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