title: Sorption of tartrate ions to lanthanum (III)-modified calcium fluor- and hydroxyapatite.
abstract: The present article details the formation of lanthanum-modified apatites and the binding process of tartrate ions with these obtained apatites. Chemical analyses, FT-IR and (31)P NMR spectroscopies, XRD powder, TGA, and TEM analyses were employed for studying the reaction between Ca(10)(PO(4))(6)(OH)(2) (HAp) or Ca(10)(PO(4))(6)(F)(2) (FAp) and LaCl(3). The reaction was found to take place mainly through partial dissolution of the apatite followed by precipitation of a new phase containing lanthanum phosphate. When La(3+) was introduced in the presence of L(+)-tartaric acid (TAH(2)), no fundamental changes were observed in the HAp or FAp structures. However, there did occur a formation of a new phase of Ca or/and La tartrate salt.
authors.affiliation: Laboratoire de Physico-Chimie des Matériaux, Faculté des Sciences de Monastir, 5019 Monastir, Tunisia.
authors.forename: Abdallah
authors.initials: A
authors.lastname: Aissa
authors.forename: Mongi
authors.initials: M
authors.lastname: Debbabi
authors.forename: Michel
authors.initials: M
authors.lastname: Gruselle
authors.forename: René
authors.initials: R
authors.lastname: Thouvenot
authors.forename: Alexandrine
authors.initials: A
authors.lastname: Flambard
authors.forename: Patrick
authors.initials: P
authors.lastname: Gredin
authors.forename: Patricia
authors.initials: P
authors.lastname: Beaunier
authors.forename: Kaia
authors.initials: K
authors.lastname: Tõnsuaadu
mesh_terms: D000327:Adsorption; D000838:Anions; D001031:Apatites / Q000737:chemistry*; D002118:Calcium / Q000737:chemistry*; D011232:Chemical Precipitation; D017886:Durapatite / Q000737:chemistry*; D007811:Lanthanum / Q000737:chemistry*; D013644:Tartrates / Q000737:chemistry*
chemical_list: D000838:Anions; D001031:Apatites; D013644:Tartrates; D007811:Lanthanum; D017886:Durapatite; C025105:fluorapatite; D002118:Calcium