Development of biochars from pyrolysis of lotus stalks for Ni(II) sorption: using zinc borate as flame retardant

Publisher:
ELSEVIER
Publication Type:
Journal Article
Citation:
Journal Of Analytical And Applied Pyrolysis, 2014, 107 pp. 336 - 341
Issue Date:
2014-01
Full metadata record
In this work, zinc borate (ZB) was employed as flame retardant for preparation of biochar (BC). A series of BC samples were generated by varying the ZB to lotus stalks (LS) ratio (0.25, 0.5 and 1.0) under different temperatures (300, 350 and 400 ?C) for 1 h. The BCs were analyzed for their surface morphologies, surface areas, surface elemental compositions and yields. The results indicated that, after charring, ZB kept the structures of the produced BCs as its starting material (LS), dramatically enhancing their yields, and promoting their surface oxygen content. The BCs were used as adsorbent for removal of Ni(II) from aqueous solutions. Sorption of Ni(II) on the BCs was enhanced about 310 times compared with that of BCs derived from pyrolysis of LS without adding ZB.
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