AN FT-IR STUDY OF ALIZARIN-RED-S ADSORBED AT THE FLUORAPATITE-WATER INTERFACE

Authors
HOLMGREN A FORSLING W WU LM
Citation
A. Holmgren et al., AN FT-IR STUDY OF ALIZARIN-RED-S ADSORBED AT THE FLUORAPATITE-WATER INTERFACE, Mikrochimica acta, 1997, pp. 197-199
Citations number
5
Categorie Soggetti
Chemistry Analytical
Journal title
Mikrochimica acta → ACNP
ISSN journal
00263672
Year of publication
1997
Supplement
14
Pages
197 - 199
Database
ISI
SICI code
0026-3672(1997):<197:AFSOAA>2.0.ZU;2-2
Abstract
The diffuse reflectance infrared Fourier transform (DRIFT) technique w as used to study sodium 1,2-dihydroxyanthraquinone-3-sulphonate (ARS) adsorbed onto the surface of fluorapatite mineral. The acidity of the water solution was varied between pH 5.4 and pH 8.4. In this pH range the infrared spectra of adsorbed ARS show that the fluorapatite surfac e contains precipitated calcium-ARS. The chelation of calcium strongly affects the resonance structure of the ARS molecule.