Binding of SO2 by Synthetic Substituted Apatites

K. Tõnsuaadu; M. Peld; V. Bender; M. Veiderma

doi:10.1023/a:1010118905445

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Journal of Thermal Analysis and Calorimetry

Volume/Issue:: Volume 56: Issue 1

Binding of SO2 by Synthetic Substituted Apatites

Authors:

K. Tõnsuaadu

K. Tõnsuaadu Tallinn Technical University Ehitajate tee 5 Tallinn 19086 Estonia Ehitajate tee 5 Tallinn 19086 Estonia

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M. Peld

M. Peld Tallinn Technical University Ehitajate tee 5 Tallinn 19086 Estonia Ehitajate tee 5 Tallinn 19086 Estonia

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V. Bender

V. Bender Tallinn Technical University Ehitajate tee 5 Tallinn 19086 Estonia Ehitajate tee 5 Tallinn 19086 Estonia

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, and

M. Veiderma

M. Veiderma Tallinn Technical University Ehitajate tee 5 Tallinn 19086 Estonia Ehitajate tee 5 Tallinn 19086 Estonia

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Pages:: 35–42

Online Publication Date:: 03 Nov 2004

Publication Date:: 01 Jul 1999

Article Category:: Research Article

DOI:: https://doi.org/10.1023/a:1010118905445

Keywords:: IR; sulphur oxide binding; synthetic substituted apatite; thermal analysis; XRD

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Abstract

The reaction of SO₂ with synthetic apatites was studied by TG, XRD and IR analyses at 400-1000C. Due to an interaction of apatite with SO₂, destruction of apatite and formation of CaSO₄ and diphosphate up to 750C 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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Journal of Thermal Analysis and Calorimetry

Print ISSN:: 1388-6150

Online ISSN:: 1572-8943

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Journal of Thermal Analysis and Calorimetry
Language	English
Size	A4
Year of Foundation	1969
Volumes per Year	1
Issues per Year	24
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	1388-6150 (Print)
ISSN	1588-2926 (Online)