期刊名称：Research Journal of Environmental and Earth Sciences
印刷版ISSN：2041-0484
电子版ISSN：2041-0492
出版年度：2011
卷号：3
期号：5
页码：555-563
出版社：Maxwell Science Publications
摘要：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.
