High efficiency removal of dissolved As(III) using iron nanoparticle-embedded macroporous polymer composites.

Autor: Savina IN; Nanoscience & Nanotechnology Group, Faculty of Science & Engineering, University of Brighton, Lewes Road, Brighton BN2 4GJ, UK.i.n.savina@brighton.ac.uk, English CJ, Whitby RL, Zheng Y, Leistner A, Mikhalovsky SV, Cundy AB
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2011 Sep 15; Vol. 192 (3), pp. 1002-8. Date of Electronic Publication: 2011 Jun 12.
DOI: 10.1016/j.jhazmat.2011.06.003
Abstrakt: Novel nanocomposite materials where iron nanoparticles are embedded into the walls of a macroporous polymer were produced and their efficiency for the removal of As(III) from aqueous media was studied. Nanocomposite gels containing α-Fe(2)O(3) and Fe(3)O(4) nanoparticles were prepared by cryopolymerisation resulting in a monolithic structure with large interconnected pores up to 100 μm in diameter and possessing a high permeability (ca. 3 × 10(-3) ms(-1)). The nanocomposite devices showed excellent capability for the removal of trace concentrations of As(III) from solution, with a total capacity of up to 3mg As/g of nanoparticles. The leaching of iron was minimal and the device could operate in a pH range 3-9 without diminishing removal efficiency. The effect of competing ions such as SO(4)(2-) and PO(4)(3-) was negligible. The macroporous composites can be easily configured into a variety of shapes and structures and the polymer matrix can be selected from a variety of monomers, offering high potential as flexible metal cation remediation devices.
(Copyright © 2011 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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