title: Fluoride adsorption by doped and un-doped magnetic ferrites CuCe(x)Fe(2-x)O4: Preparation, characterization, optimization and modeling for effectual remediation technologies.
abstract: A series of doped and un-doped magnetic adsorbents CuCexFe2-xO4 (x=0.0-0.5) for fluoride were prepared with the micro-emulsion method. Fluoride adsorption was optimized for solution pH, temperature, contact time, and initial concentration and was monitored via normal phase ion chromatography (IC). The effect of concomitant anions was also explored to perform and simulate competitive fluoride adsorption in real water samples. Optimal adsorption was discovered by a simple quadratic model based on central composite design (CCD) and the response surface method (RSM). The adsorption, electrochemical and magnetic properties were compared between doped and un-doped ferrites. Doped ferrites (x=0.1-0.5) were found to be superior to un-doped ferrites (x=0) regarding the active sites, functional groups and fluoride adsorption. The characterization, optimization and application results of the doped ferrites indicated enhanced fluoride adsorption and easy separation with a simple magnet.
authors.affiliation: Department of Geology, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia; Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia. Electronic address: drmarehman83@gmail.com.
authors.forename: Muhammad Abdur
authors.initials: MA
authors.lastname: Rehman
authors.affiliation: Department of Geology, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
authors.forename: Ismail
authors.initials: I
authors.lastname: Yusoff
authors.affiliation: Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: Yatimah
authors.initials: Y
authors.lastname: Alias
keywords: Adsorption; CuFe(2)O(4); Ferrites; Fluorides; Ion chromatography; Micro-emulsion