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Abstract
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Article Information:
Removal of Phenol from Water by Carbon Adsorbents Prepared by Pyrolysis of Sorghum and Millet Straws in Ortho Phosphoric Acid
A.O. Lawal, J.A. Lori and D. Tom Tuker
Corresponding Author: Anako Opotu Lawal
Submitted: 2011 March, 07
Accepted: 2011 April, 07
Published: 2011 June, 05 |
Abstract:
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The aim of this study is to determine the suitability of sorghum and millet straws as precursors for
carbon adsorbents with capabilities for removing phenol from contaminated water. Phenol compounds react
with chlorine in water to produce chlorophenols which have very low threshold odour concentrations in
domestic water supply. Activated carbon adsorbents were prepared from millet and sorghum straws by chemical
activation with phosphoric acid and used for the removal of aqueous phenol. The abilities of the carbon
adsorbents to remove phenol from contaminated water were determined by aqueous phase phenol adsorption.
Equilibrium concentrations of phenol were monitored, using Cole UV7504 Spectrophotometer at a wavelength
of 269 nm. The adsorption data fitted the Freundlich isotherm and indicated multilayer adsorption of aqueous
phenol on the carbon beds. The maximum adsorption capacities of the granular activated carbon from the
cellulosic precursors were 80.36 and 82.34 mg/g of carbon from millet and sorghum straws respectively. The
results suggest the suitability of the carbon adsorbents in community water detoxification protocols to remove
phenol.
Key words: Activated carbon, chemical activation, millet, phenol, sorghum, straws,
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Cite this Reference:
A.O. Lawal, J.A. Lori and D. Tom Tuker, . Removal of Phenol from Water by Carbon Adsorbents Prepared by Pyrolysis of Sorghum and Millet Straws in Ortho Phosphoric Acid. Research Journal of Environmental and Earth Sciences, (4): 429-432.
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ISSN (Online): 2041-0492
ISSN (Print): 2041-0484 |
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