Florisil was employed for the sorption of antimony ions from aqueous solutions. A detailed study of the process was performed by varying the sorption time, pH, and temperature. The sorption was found to be fast, equilibrium was reached within 15 min. Moreover, a maximum sorption has been achieved from solution when the pH ranges between 1–10. From kinetic experiments it follows that the process correlate with the second-order kinetic model. The overall rate process appears to be influenced by both boundary layer diffusion and intra-particle diffusion. The Langmuir and Dubinin-Radushkevich (D-R) type sorption isotherms can be applied to fit and interpret the sorption data. The mean energy of adsorption (9.73 kJ mol−1) was calculated from the Dubinin-Radushkevich (D-R) adsorption isotherm at room temperature. Furthermore, the thermodynamic parameters for the sorption were also determined, and the ΔH0 and ΔG0 values indicate a spontaneous endothermic behavior.
Sorption behavior of Florisil for the removal of antimony ions from aqueous solutions
Lei Zhang, Qing Lin, Xingjia Guo, Francis Verpoort; Sorption behavior of Florisil for the removal of antimony ions from aqueous solutions. Water Sci Technol 1 May 2011; 63 (10): 2114–2122. doi: https://doi.org/10.2166/wst.2011.497b
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