title: Arsenic (V) adsorption on Fe3O4 nanoparticle-coated boron nitride nanotubes.
abstract: Multiwalled boron nitride nanotubes (BNNTs) functionalized with Fe(3)O(4) nanoparticles (NPs) were used for arsenic removal from water solutions. Sonication followed by a heating process was developed to in situ functionalize Fe(3)O(4) NPs onto a tube surface. A batch of adsorption experiments conducted at neutral pH (6.9) and room temperature (25 °C) and using the developed nanocomposites revealed effective arsenic (V) removal. The Langmuir, Freundlich, and Dubinin-Radushkevich adsorption isotherms were measured for a range of As(V) initial concentrations from 1 to 40 mg/L under the same conditions. The equilibrium data well fitted all isotherms, indicating that the mechanism for As(V) adsorption was a combination of chemical complexation and physical electrostatic attraction with a slight preference for chemisorption. The magnetite NPs functionalized on BNNTs led to a simple and rapid separation of magnetic metal-loaded adsorbents from the treated water under an external magnetic field.
authors.affiliation: International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, Namiki 1-1, Tsukuba 305-0044, Japan.
authors.forename: Rongzhi
authors.initials: R
authors.lastname: Chen
authors.forename: Chunyi
authors.initials: C
authors.lastname: Zhi
authors.forename: Huang
authors.initials: H
authors.lastname: Yang
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Bando
authors.forename: Zhenya
authors.initials: Z
authors.lastname: Zhang
authors.forename: Norio
authors.initials: N
authors.lastname: Sugiur
authors.forename: Dmitri
authors.initials: D
authors.lastname: Golberg
mesh_terms: D000327:Adsorption; D001151:Arsenic / Q000737:chemistry*; D001896:Boron Compounds / Q000737:chemistry*; D052203:Ferrosoferric Oxide / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D043942:Nanotubes / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties
chemical_list: D001896:Boron Compounds; C017282:boron nitride; D001151:Arsenic; D052203:Ferrosoferric Oxide