title: Removal of fluoride ions from drinking water and fluoride solutions by aluminum modified iron oxides in a column system.
abstract: The purpose of this work was to evaluate the potential of aluminum modified iron oxides, in a continuous flow for removal of fluoride ions from aqueous solutions and drinking water. The breakthrough curves obtained for fluoride ions adsorption from aqueous solutions and drinking water were fitted to Thomas, Bohart-Adams, and bed depth service time model (BDST). Adsorption capacities at the breakthroughs, Thomas model constant, kinetic constant and the saturation concentration were determined. The results show that in general, the adsorption efficiency decreases as the bed depth increases, and this behavior shows that the adsorption is controlled by the mass transport resistance. The adsorption capacity for fluoride ions by CP-Al is higher for fluoride aqueous solutions than drinking water.
authors.affiliation: Instituto Nacional de Investigaciones Nucleares, Depto. de Química, Apdo. Postal 18-1027, 11801 México, DF, Mexico.
authors.forename: J J
authors.initials: JJ
authors.lastname: García-Sánchez
authors.forename: M
authors.initials: M
authors.lastname: Solache-Ríos
authors.forename: V
authors.initials: V
authors.lastname: Martínez-Miranda
authors.forename: C
authors.initials: C
authors.lastname: Solís Morelos
mesh_terms: D000327:Adsorption; D000535:Aluminum / Q000737:chemistry*; D060766:Drinking Water / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D005459:Fluorides / Q000302:isolation & purification*; D012996:Solutions
chemical_list: D060766:Drinking Water; D005290:Ferric Compounds; D012996:Solutions; C000499:ferric oxide; D000535:Aluminum; D005459:Fluorides
keywords: Adsorption; Column system; Drinking water; Fluoride; Iron oxides