Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 174, Issue 1-3, Pages 137-143Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2009.09.027
Keywords
Biosorption; Chestnut shell; Copper; Isotherm; Kinetics; Thermodynamics
Categories
Funding
- Shenyang Science and Technology Plan [1081283-9-00]
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The biosorption of Cu(II) onto chestnut shell, a residue of the food processing industry, in a batch adsorber has been studied. Equilibrium isotherms, kinetic data, and thermodynamic parameters have been evaluated. Equilibrium data agreed well with Langmuir isotherm and Redlich-Peterson isotherm models. The adsorption capacity of chestnut shell for Cu(II) was determined with the Langmuir model and was found to be 12.56 mg g(-1) at 293 K. The kinetic data were found to follow the pseudo-second-order model. Intra-particle diffusion is not the sole rate-controlling factor. Gibbs free energy was spontaneous for all interactions, and the adsorption process exhibited exothermic enthalpy values. Chestnut shell was shown to be a promising biosorbent for Cu(II) removal from aqueous solutions. (C) 2009 Elsevier B.V. All rights reserved.
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