Removal of oxovanadium(IV) from aqueous solutions by using commercial crystalline calcium hydroxyapatite

The interaction of oxovanadium(IV) (VO 2+) in aqueous solution with commercial calcium hydroxyapatite (CAP) has been studied. VO 2+ 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 chemi...

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Bibliographic Details
Published in:Water research (Oxford) 2003-04, Vol.37 (8), p.1776-1782
Main Authors: Vega, E.D., Pedregosa, J.C., Narda, G.E., Morando, P.J.
Format: Article
Language:English
Subjects:
Adsorption
Applied sciences
Biocompatible Materials - chemistry
Durapatite - chemistry
Exact sciences and technology
Hydroxyapatite
Industrial wastewaters
Isotherms
Oxovanadium(IV)
Pollution
Solid–liquid interaction
Sorption
Vanadates - isolation & purification
Wastewater
Wastewaters
Water Pollutants - isolation & purification
Water Purification - methods
Water treatment and pollution
X-Ray Diffraction
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Summary:The interaction of oxovanadium(IV) (VO 2+) in aqueous solution with commercial calcium hydroxyapatite (CAP) has been studied. VO 2+ 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 VO 2+/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 VO 2+ is indeed adsorbed on CAP and the extent of adsorption depends on the pH and temperature.
ISSN:0043-1354
1879-2448
DOI:10.1016/S0043-1354(02)00565-1