Title of article
Removal of oxovanadium(IV) from aqueous solutions by using commercial crystalline calcium hydroxyapatite
Author/Authors
Pedregosa، J. C. نويسنده , , Narda، G. E. نويسنده , , Vega، E. D. نويسنده , , Morando، P. J. نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2003
Pages
-1775
From page
1776
To page
0
Abstract
The interaction of oxovanadium(IV) (VO2+) in aqueous solution with commercial calcium hydroxyapatite (CAP) has been studied. VO2+ ions are adsorbed on the surface of CAP by coordination to OH groups, without modification of the crystalline lattice. The extent of the adsorption is followed by chemical analysis, ESR and IR spectroscopy. Results are compared with those obtained for VO2+/synthetic calcium hydroxyapatite (HAP), reported by us in previous works. The uptake is better than the observed for HAP. The maximum adsorption is observed at pH 3.5 and 288 K. We conclude that VO2+ is indeed adsorbed on CAP and the extent of adsorption depends on the pH and temperature.
Keywords
Hydroxyapatite , Oxovanadium(IV) , sorption , isotherms , Wastewater , Solid–liquid interaction
Journal title
Water Research
Serial Year
2003
Journal title
Water Research
Record number
84435
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