Binding of SO2 by synthetic substituted apatites

Authors
Tonsuaadu, K Peld, M Bender, V Veiderma, M
Citation
K. Tonsuaadu et al., Binding of SO2 by synthetic substituted apatites, J THERM ANA, 56(1), 1999, pp. 35-42
Citations number
12
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
ISSN journal
13886150 → ACNP
Volume
56
Issue
1
Year of publication
1999
Pages
35 - 42
Database
ISI
SICI code
1388-6150(1999)56:1<35:BOSBSS>2.0.ZU;2-Q
Abstract
The reaction of SO2 with synthetic apatites was studied by TG, XRD and IR a nalyses at 400-1000 degrees C. Due to an interaction of apatite with SO2, d estruction of apatite and formation of CaSO4 and diphosphate up to 750 degr ees C takes place. The further calcination leads to the formation of beta-C a-3(PO4)(2) and a part of the SO2 bound is lost again. The amount of SO2 bo und with apatite at calcination depends on the substitutions (F- <--> OH-, PO43- <--> CO32-, Ca2+ <--> Mg2+) in its structure.