title: In situ probing calcium carbonate formation by combining fast controlled precipitation method and small-angle X-ray scattering.
abstract: The initial stage of calcium carbonate nucleation and growth, found usually in "natural" precipitation conditions, is still not well understood. The calcium carbonate formation for moderate supersaturation level could be achieved by an original method called the fast controlled precipitation (FCP) method. FCP was coupled with SAXS (small-angle X-ray scattering) measurements to get insight into the nucleation and growth mechanisms of calcium carbonate particles in Ca(HCO3)2 aqueous solutions. Two size distributions of particles were observed. The particle size evolutions of these two distributions were obtained by analyzing the SAXS data. A nice agreement was obtained between the total volume fractions of CaCO3 obtained by SAXS analysis and by pH-resistivity curve modeling (from FCP tests).
authors.affiliation: EDF R&D, Laboratoire National d'Hydraulique et Environnement , 6 Quai Watier, 78401 Chatou, Cedex, France.
authors.forename: Yanjia
authors.initials: Y
authors.lastname: Chao
authors.forename: Olivier
authors.initials: O
authors.lastname: Horner
authors.forename: Philippe
authors.initials: P
authors.lastname: Vallée
authors.forename: Florian
authors.initials: F
authors.lastname: Meneau
authors.forename: Olga
authors.initials: O
authors.lastname: Alos-Ramos
authors.forename: Franck
authors.initials: F
authors.lastname: Hui
authors.forename: Mireille
authors.initials: M
authors.lastname: Turmine
authors.forename: Hubert
authors.initials: H
authors.lastname: Perrot
authors.forename: Jean
authors.initials: J
authors.lastname: Lédion
mesh_terms: D002119:Calcium Carbonate / Q000138:chemical synthesis* / Q000737:chemistry; D011232:Chemical Precipitation; D006863:Hydrogen-Ion Concentration; D053838:Scattering, Small Angle; D014961:X-Ray Diffraction
chemical_list: D002119:Calcium Carbonate