Adsorption of Pb(II) by Silica/Yeast Composites from Aqueous Solution: Kinetic and Equilibrium Studies

Abstract:

Silica/yeast composites were prepared for removal of Pb(II) from aqueous solution. The effects of pH, contact time and initial concentration were examined. The optimum pH was 5.0. The kinetic data were investigated by pseudo-first-order and pseudo-second-order models. The kinetic rates were better fitted to the pseudo-second-order model. The experimental data were fitted with the Langmuir and Freundlich models to analyze the equilibrium isotherms. The maximum adsorption capacity calculated from Langmuir isotherm was 73.53 mg/g. The Langmuir isotherm was more favorable to describe the experimental data.

• Periodical: Advanced Materials Research (Volume 496)
• Pages: 476-479
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.496.476
• Online since: March 2012
• Authors: Hong Xiang Ou, Yu Jun Song, Ling Rui Li, Wei Hong Huang
• Keywords: Adsorption, Isotherm, Kinetic Models, Pb(II), Silica/Yeast Composites

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