The Kinetics and Isotherms of Adsorption of Sb(III) from Aqueous Solutions onto the Porous Biomorph-Genetic Composite of Fe₂O₃/Fe₃O₄/C with Bamboo Template

Abstract:

Static adsorption of Sb (III) on a porous biomorph-genetic composite of Fe₂O₃/Fe₃O₄/C (PBGC-Fe/C-B) was studied. The results showed that the kinetic curve of Sb (III) adsorption by PBGC-Fe/C-B had same change trend under initial concentration of 5, 10 and 50 mg/L. The fitting and regression analysis of four kinds of kinetic model indicated that, the adsorption kinetics of Sb (III) by the PBGC-Fe/C-B well follow the pseudo-second-order model (R²>0.9999). At different reaction temperature (25 °C, 35 °C and 45 °C), the adsorption capacity of Sb (III) by PBGC-Fe/C-B both increased with increasing the solution equilibrium concentration. While it showed a declined tendency with temperature increased. The Langmuir isotherm model (R²>0.98) and the Freundlich isotherm model (R²>0.95) had both better fitted with the equilibrium data.

• Periodical: Applied Mechanics and Materials (Volume 394)
• Pages: 8-13
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.394.8
• Online since: September 2013
• Authors: Zong Qiang Zhu, Shuang Cao, Wen Hui Wei, Yi Nian Zhu
• Keywords: Adsorption, Fe₂O₃/Fe₃O₄/C Composite with Bamboo Microstructure, Isotherm, Kinetic, Sb(III)

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