title: Adsorptive removal of arsenites by a nanocrystalline hybrid surfactant-akaganeite sorbent.
abstract: Removal of toxic arsenite ions from aqueous solutions was investigated using an innovative hybrid nanocrystalline surfactant-modified akaganeite. This sorbent was prepared using ferric chloride as the precursor and a cationic surfactant, hexadecyltrimethylammonium bromide. From the experimental work, the material was found to be an effective adsorbent for the separation of arsenites. The chemical kinetics of the process was studied, described by a pseudo-second-order equation. The Freundlich adsorption isotherm was determined to examine the mechanism of sorption. FTIR measurements and XPS analysis gave useful information both on the sorbent synthesized and on the arsenite removal process.
authors.affiliation: Section of Chemical Technology and Industrial Chemistry, School of Chemistry, Aristotle University of Thessaloniki, P.O. Box 116, 54124 Thessaloniki, Greece. lenadj@chem.auth.gr
authors.forename: E A
authors.initials: EA
authors.lastname: Deliyanni
authors.forename: L
authors.initials: L
authors.lastname: Nalbandian
authors.forename: K A
authors.initials: KA
authors.lastname: Matis
mesh_terms: D000327:Adsorption; D018053:Arsenites / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D007700:Kinetics; D049329:Nanostructures / Q000737:chemistry*; D012680:Sensitivity and Specificity; D013053:Spectrophotometry / Q000379:methods; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D013499:Surface Properties; D013501:Surface-Active Agents / Q000737:chemistry*; D013997:Time Factors; D014965:X-Rays
chemical_list: D018053:Arsenites; D005290:Ferric Compounds; D013501:Surface-Active Agents; C473845:akaganeite