Article ID Journal Published Year Pages File Type
10277216 Journal of Environmental Chemical Engineering 2015 9 Pages PDF
Abstract
Sorption of uranium(VI) from aqueous solution onto powdered corn cob has been carried out using batch technique. The maximum removal (98.5%) was obtained at pH 5 and contact time 60 min. Freundlich, Langmuir, Temkin and Dubinin-Radushkevich (D-R) isotherms are used for describing the sorption process. It is found that the Langmuir isotherm appears to be the best fitting model and pseudo-first order, pseudo-second order, Elovich and intraparticle diffusion kinetics models were studied. The results indicate that the process follows the pseudo-second-order kinetics model. As well as the thermodynamic data indicate that the sorption processes is exothermic. The values of enthalpy (ΔH°), mean free energy (E) and activation energy (Ea) indicate that the sorption process is physical sorption. A single stage of batch adsorber has been designed for various volumes using the Langmuir isotherm.
Related Topics
Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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