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  • preparation and characterization of a novel magnetic biochar for arsenic removal

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 571
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     a magnetic biochar based adsorbent with colloidal or nanosized γ-fe2o3 particles embedded in porous biochar matrix was fabricated via thermal pyrolysis of fecl3 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-fe2o3particles with size between hundreds of nanometers and several micrometers tightly grow within the porous biochar matrix. biochar/γ-fe2o3 composite exhibited excellent ferromagnetic property with a saturation magnetization of 69.2 emu/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-fe2o3 composite could be easily separated from the solution by a magnet at the end of the sorption experiment.

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