Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5410118 | Journal of Molecular Liquids | 2016 | 7 Pages |
Abstract
The adsorption of Eu(III) and U(VI) from aqueous solutions by palygorskite was studied by batch experiments under various experimental conditions. The palygorskite was characterized by TEM, XRD, FT-IR and potentiometric titration. The adsorption kinetics of Eu(III) and U(VI) on palygorskite were both well described by pseudo-second-order model with high correlation coefficient. The adsorption of Eu(III) and U(VI) by palygorskite decreased with increasing ionic strength, indicating outer-sphere surface complexation predominated. The adsorption isotherms indicated that the adsorption of Eu(III) and U(VI) by palygorskite fitted by Freundlich models were better than Langmuir models. The maximum adsorption capacities of Eu(III) and U(VI) on palygorskite calculated from Langmuir model were 24.26 and 46.75 mg·gâ 1 at pH 4.0 and 333 K, respectively. The thermodynamic parameters suggested that the adsorption of Eu(III) and U(VI) on palygorskite was a spontaneous and endothermic process.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Yuke Zhu, Tianhu Chen, Haibo Liu, Bin Xu, Jingjing Xie,