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Abstract
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Article Information:
Crude Oil Sorption onto Groundnut Shell Activated Carbon: Kinetic and Isotherm Studies
A.P. Uzoije, A. Onunkwo-A and N. Egwuonwu
Corresponding Author: Atulegwu Patrick Uzoije
Submitted: 2011 April, 04
Accepted: 2011 May, 13
Published: 2011 August, 10 |
Abstract:
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An adsorbent of Activated Groundnut Shell Carbon (AGSC) was prepared to adsorb crude oil from
water solution. The study of its adsorption mechanism was studied in terms of equilibriumand kinetics.Popular
Freundlich, Langumiur, Temkin and Dubinin Radushkrvich models were adopted to study the isotherms.
Although Dubinin Radushkrvich model (R2 = 0.368) is not in agreement with the equilibrium data but
Freundlich (R2 = 0.992), Langumiur (R2 = 0.985) and Temkin (R2 = 0.54) models were observed to follow the
data with Freundlich model best described the data (R2 = 0.992). The data were also subjected to kinetic studies
using largergreen first order, pseudo second order and intra-diffusion kinetic models. It was found that pseudosecond
order with the degree of fitness of R2 = 0.99, 0.93, 0.99,0.97 and 0.99 for crude oil samples A,B,C,D
and E respectively, fitted the data better than Largergreen which has the degree of fitness as R2 = 0.89, 0.65,
0.66.0.66 and 0.68, respectively for A, B, C, D and E. The results from the intra-diffusion model revealed that
the intra-diffusion and external mass transfer are both rate determining stages of the adsorption process. The
results of the study implies that AGSC is a good mop-up and low-cost alternative medium for oil spilled surfaces.
Key words: Adsorption, carbon, equilibrium, groundnut-shell, kinetic, models,
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Cite this Reference:
A.P. Uzoije, A. Onunkwo-A and N. Egwuonwu, . Crude Oil Sorption onto Groundnut Shell Activated Carbon: Kinetic and Isotherm Studies. Research Journal of Environmental and Earth Sciences, (5): 555-563.
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ISSN (Online): 2041-0492
ISSN (Print): 2041-0484 |
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