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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472 EISSN: 1735-1472
Vol. 12, No. 1, 2015, pp. 211-222
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Bioline Code: st15019
Full paper language: English
Document type: Research Article
Document available free of charge
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International Journal of Environment Science and Technology, Vol. 12, No. 1, 2015, pp. 211-222
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Pentachlorophenol (PCP) adsorption from aqueous solution by activated carbons prepared from corn wastes
Abdel-Ghani, N.T.; El-Chaghaby, G.A. & Zahran, E.M.
Abstract
Corn wastes generated from starch and glucose
production industry were used for the preparation of activated
carbons. The prepared activated carbons and a
commercial activated carbon were evaluated for their
capability of adsorbing pentachlorophenol (PCP) from
aqueous solution. Batch adsorption experiments were performed
under different operating conditions including pH
(2–8), adsorbent dosage (0.5–4.0 g/l), initial PCP concentration
(10–100 mg/l), contact time (30–300 min), and
temperature (25–45 °C). The kinetics and equilibrium
models describing the adsorption of PCP by the prepared
adsorbents were obtained. The adsorption of PCP by corn
waste-based adsorbents was found to follow the secondorder
kinetics and the Freundlich equilibrium models. The
intraparticle diffusion mechanism was successfully fitted to
the obtained experimental data. Thermodynamic studies
indicated that the adsorption process was exothermic. The
adsorbents surface characterization revealed the presence
of many functional groups capable of binding the adsorbate
molecules. The study results suggest the possible use of
corn wastes as a starting material for the production of
activated carbon, thus lowering the costs of wastewater
treatment processes.
Keywords
Activated carbon; Adsorption; Corn waste; Isotherms; Kinetics; Pentachlorophenol; Thermodynamics
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