Sorption of Nickel on Carbonate Fluoroapatites
Identifieur interne : 000269 ( France/Analysis ); précédent : 000268; suivant : 000270Sorption of Nickel on Carbonate Fluoroapatites
Auteurs : Jane Perrone [France] ; Blandine Fourest [France] ; Eric Giffaut [France]Source :
- Journal of Colloid And Interface Science [ 0021-9797 ] ; 2001.
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Abstract
The retention properties of a synthetic carbonate fluoroapatite and a natural francolite are compared in the present work from an investigation of the sorption of 63Ni at tracer scale amounts onto these solids. Two different surface complexation models were successively used to fit the experimental adsorption isotherms obtained under various experimental conditions: the nonelectrostatic model and the constant capacitance model. The results are essentially described by two main equilibria involving one proton in acidic media and three protons in basic media. The corresponding thermodynamic constants are in agreement for both models. Modeling gives also close values for both solids, despite their distinct solubility and surface acidity.
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DOI: 10.1006/jcis.2001.7583
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ISTEX:597BA27EC14FF92042C20BC4321A588E01290082Le document en format XML
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Two different surface complexation models were successively used to fit the experimental adsorption isotherms obtained under various experimental conditions: the nonelectrostatic model and the constant capacitance model. The results are essentially described by two main equilibria involving one proton in acidic media and three protons in basic media. The corresponding thermodynamic constants are in agreement for both models. Modeling gives also close values for both solids, despite their distinct solubility and surface acidity.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Île-de-France</li></region><orgName><li>Université Paris-Sud</li></orgName></list><tree><country name="France"><region name="Île-de-France"><name sortKey="Perrone, Jane" sort="Perrone, Jane" uniqKey="Perrone J" first="Jane" last="Perrone">Jane Perrone</name></region><name sortKey="Fourest, Blandine" sort="Fourest, Blandine" uniqKey="Fourest B" first="Blandine" last="Fourest">Blandine Fourest</name><name sortKey="Giffaut, Eric" sort="Giffaut, Eric" uniqKey="Giffaut E" first="Eric" last="Giffaut">Eric Giffaut</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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