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Scientific Research and Essays Vol. 2 (4),
132-134, April 2007
ISSN 1992-2248
© 2007 Academic Journals
Full Length
Research Paper
Removal of selected metal ions from aqueous
solution by adsorption onto chemically modified maize cobs
Akporhonor,
E. E.1* and Egwaikhide, P. A.2
1Department
of Chemistry, Delta State Uiversity, Abraka, Delta State, Nigeria.
2Department
of Chemistry, Ambrose Alli University, Ekpoma, Edo State, Nigeria.
*Corresponding author. E-mail:
Akporhonor@yahoo.com..
Accepted 16
April, 2007 |
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Maize cob carbon was prepared by pyrolysis at 300 and 400oC for
35 min. This was followed by steeping in saturated ammonium chloride. The
activated carbon which was characterized for bulk density, surface area,
surface area charge, abrasion resistance and pH was used in the removal of
Cd2+, N12+, Cd2+ and Zn2+.
The surface areas of the maize cob carbon at 300 and 400oC were
0.010 and 0.021 g sample per mg iodine, respectively. The effectiveness of
the modified maize cobs in removing the metal ions from solution was found
to be Zn >Ni> Cd. The removal efficiency of the metal ions is depended on
the metal ion concentration and temperature of carbonization.
Key words:
Maize cobs, activated carbon, pyrolysis, steeping,carbonization. |
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