title: Preparation and characterization of a novel magnetic biochar for arsenic removal.
abstract: A magnetic biochar based adsorbent with colloidal or nanosized γ-Fe(2)O(3) particles embedded in porous biochar matrix was fabricated via thermal pyrolysis of FeCl(3) treated biomass. The synthesized samples were studied systematically by X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, selected-area electron diffraction pattern, scanning electron microscopy, energy-dispersive X-ray analysis, superconducting quantum interference device, and batch sorption measurements. The characterization analyses showed that large quantity of γ-Fe(2)O(3) particles with size between hundreds of nanometers and several micrometers tightly grow within the porous biochar matrix. Biochar/γ-Fe(2)O(3) composite exhibited excellent ferromagnetic property with a saturation magnetization of 69.2emu/g. Batch sorption experimental results showed that the composite has strong sorption ability to aqueous arsenic. Because of its excellent ferromagnetic properties, the arsenic-laden biochar/γ-Fe(2)O(3) composite could be easily separated from the solution by a magnet at the end of the sorption experiment.
authors: Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL 32611, United States.
authors: Ming
authors: M
authors: Zhang
authors: Bin
authors: B
authors: Gao
authors: Sima
authors: S
authors: Varnoosfaderani
authors: Arthur
authors: A
authors: Hebard
authors: Ying
authors: Y
authors: Yao
authors: Mandu
authors: M
authors: Inyang
mesh_terms: D000327:Adsorption; D001151:Arsenic / Q000302:isolation & purification*; D018533:Biomass; D002606:Charcoal / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D007700:Kinetics; D059346:Magnets / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D005290:Ferric Compounds; D014874:Water Pollutants, Chemical; C540010:biochar; D002606:Charcoal; C000499:ferric oxide; D001151:Arsenic