title: As(V) adsorption on maghemite nanoparticles.
abstract: In this study a novel adsorbent, maghemite nanoparticles (gamma-Fe(2)O(3)), is used for As(V) removal. Maghemite nanoparticles are an exceptional adsorbent material due to its magnetic properties and a good adsorption capacity. The aims of the study were to investigate the suitability of maghemite nanoparticles for As(V) adsorption and to compare properties of different maghemites and their As(V) adsorption efficiency. Maghemite nanoparticles were characterized by XRD, XPS, TEM, VSM, BET and Zeta potential analyzers. Size of the particles varied from 3.8 to 18.4 nm. Adsorption experiments were carried out with three different kinds of maghemite nanoparticles: (i) commercially available, (ii) homemade with mechanochemical method and (iii) homemade with sol-gel process. All three different kinds of maghemite nanoparticles were successful in removing As(V) from water, one of them reached as high adsorption capacity as 50mg/g.
authors.affiliation: Laboratory of Applied Environmental Chemistry, Department of Environmental Sciences, University of Kuopio, Patteristonkatu 1, 50100 Mikkeli, Finland. tanja.tuutijarvi@uku.fi
authors.forename: T
authors.initials: T
authors.lastname: Tuutijärvi
authors.forename: J
authors.initials: J
authors.lastname: Lu
authors.forename: M
authors.initials: M
authors.lastname: Sillanpää
authors.forename: G
authors.initials: G
authors.lastname: Chen
mesh_terms: D000327:Adsorption; D001151:Arsenic / Q000302:isolation & purification*; D005290:Ferric Compounds / Q000737:chemistry*; D008280:Magnetics; D053758:Nanoparticles / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods
chemical_list: D005290:Ferric Compounds; D014874:Water Pollutants, Chemical; C000499:ferric oxide; D001151:Arsenic