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This work explored two modification methods to improve biochar’s ability to sorb arsenic (As) and lead (Pb). In one, pine wood feedstock was pyrolyzed in the presence of MnCl2·4H2O (MPB) and in the other it was impregnated with birnessite via precipitation following pyrolysis (BPB). The resulting biochars were characterized using thermogravimetry, X-ray diffraction, X-ray photoelectron spectroscopy,...
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...
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