Interaction between hydroxiapatite and seawater

Authors
Citation
Av. Savenko, Interaction between hydroxiapatite and seawater, OKEANOLOGIY, 38(5), 1998, pp. 773-776
Citations number
8
Categorie Soggetti
Aquatic Sciences","Earth Sciences
Journal title
OKEANOLOGIYA
ISSN journal
00301574 → ACNP
Volume
38
Issue
5
Year of publication
1998
Pages
773 - 776
Database
ISI
SICI code
0030-1574(199809/10)38:5<773:IBHAS>2.0.ZU;2-G
Abstract
The kinetics of hydroxiapatite transformation in the interaction with seawa ter was studied. Decrease of seawater pH concentrations of dissolved fluori de and carbonate alkalinity takes place for a certain lime interval, which confirms transition of hydroxiapatite to fluorinehydroxiapatite. Five weeks later after the beginning of the experiments the seawater composition appr oached the equilibrium. It was determined that the equilibrium concentratio n of dissolved phosphorus reduces with the increase of fluoride concentrati on and increases with elevation of carbonate alkalinity. It was shown that seawater containing 2-3 x 10(-6) mol P/l was not saturated with respect to fluorincarbonateapatite which confirms that direct chemogenic formation of calcium phosphate from seawater is impossible.