title: Elaboration of the hydroxyapatite with different precursors and application for the retention of the lead.
abstract: Carbonate hydroxyapatite (CHAP) was synthesized from different precursors; synthetic (CaCO3 and Ca(OH)2) and natural (egg shell before and after calcinations at 900 degrees C) under different conditions and characterized by using TG/DTG analysis, X-ray powder diffraction (XRD) method and Fourier transform infrared (FT-IR) spectroscopy techniques. The results of these analyses indicate that the four powders present the same structure of hydroxyapatite. Furthermore the four powders obtained were used for the retention of lead. The results obtained indicated that all powders present high adsorption capacity for lead, but from environmental and economic views, the hydroxyapatite synthesized from eggshell no calcined (HA2) is most advantageous. The influence of different sorption parameters, such as: initial metal concentration, equilibration time, solution pH and sorbent dosage was studied and discussed.
authors: Faculté de Technologie, Département de Génie des Procédés, Laboratoire de Génie de l'Environnement, Université de Bejala, Algérie. meskisamira@yahoo.fr
authors: S
authors: S
authors: Meski
authors: S
authors: S
authors: Ziani
authors: H
authors: H
authors: Khireddine
authors: F
authors: F
authors: Yataghane
authors: N
authors: N
authors: Ferguene
mesh_terms: D000327:Adsorption; D017886:Durapatite / Q000138:chemical synthesis*; D006863:Hydrogen-Ion Concentration; D007854:Lead / Q000302:isolation & purification*; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D013818:Thermogravimetry; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D014961:X-Ray Diffraction
chemical_list: D014874:Water Pollutants, Chemical; D007854:Lead; D017886:Durapatite