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Kinetics and adsorption equilibrium of some radionuclides on polyaniline/SiO2 composite

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Published/Copyright: January 8, 2021
Radiochimica Acta
From the journal Radiochimica Acta Volume 109 Issue 2

Abstract

The sorption kinetics and equilibrium isotherms of zirconium, uranium, and molybdenum ions onto synthetic polyaniline/SiO2 composite (PAn/SiO2) have been studied using batch-sorption techniques. This study was carried out to examine the sorption behavior of the PAn/SiO2 for the removal of Zr(IV), U(VI), and Mo(VI) ions from an aqueous solution. The influence of some parameters on the sorption process was also studied. The maximum sorption for Zr(IV), U(VI), and Mo(VI) ions was achieved at 60 min shaking time. Langmuir isotherm model is the most representative for discussing the sorption process with a maximum sorption capacity of 24.26, 21.82, and 13.01 mg/g for Zr(IV), U(VI), and Mo(VI) ions, respectively. Kinetic modeling revealed that the sorption of all ions follows the pseudo-second-order kinetic model. The results demonstrated that both the external and intra-particular diffusion are taken into account in determining the sorption rate. Thermodynamic parameters like ΔG°, ΔH°, and ΔS° for the sorption process were evaluated. The synthetic composite has been successfully applied for the removal and recovery of U(VI) ions from real solution (monazite leachate) using a chromatographic column packed with PAn/SiO2 composite with a breakthrough capacity equal to 239.70 mg/g.

Keywords: PAn/SiO2 composite; Zr(IV); U(VI); Mo(VI); Kinetics; sorption isotherms models
Corresponding author: Ezzat A. Abdel-Galil, Hot Laboratories and Waste Management Center, Atomic Energy Authority, 13759, Cairo, Egypt, E-mail

Acknowledgments

The authors would like to express their sincere thanks to Prof. Dr. Amal Tourky, Prof. of Physical Chemistry, Faculty of Science, Al-Azhar University, Girls Branch, Cairo, Egypt, for her support and Encouragement and her deeply useful scientific discussions.

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: None declared.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2020-03-04
Accepted: 2020-11-20
Published Online: 2021-01-08
Published in Print: 2021-02-23

© 2020 Walter de Gruyter GmbH, Berlin/Boston

Articles in the same Issue

  1. Frontmatter
  2. Original Papers
  3. Sorption and surface complexation modeling of 137Cs on Fe(II)-montmorillonite clay mineral relevant to nuclear waste disposal
  4. Kinetics and adsorption equilibrium of some radionuclides on polyaniline/SiO2 composite
  5. Adsorption from liquid metals: an approach for recovery of radionuclides from irradiated targets
  6. Radioiodination and biological evaluation of Cimetidine as a new highly selective radiotracer for peptic ulcer disorder detection
  7. Astatine-211 labelled a small molecule peptide: specific cell killing in vitro and targeted therapy in a nude-mouse model
  8. Impact of foaming agent and nanoparticle fillers on the properties of irradiated rubber
  9. Development of SiO2 based doped with LiF, Cr2O3, CoO4 and B2O3 glasses for gamma and fast neutron shielding
https://doi.org/10.1515/ract-2020-0014
Keywords for this article
PAn/SiO2 composite; Zr(IV); U(VI); Mo(VI); Kinetics; sorption isotherms models

Articles in the same Issue

  1. Frontmatter
  2. Original Papers
  3. Sorption and surface complexation modeling of 137Cs on Fe(II)-montmorillonite clay mineral relevant to nuclear waste disposal
  4. Kinetics and adsorption equilibrium of some radionuclides on polyaniline/SiO2 composite
  5. Adsorption from liquid metals: an approach for recovery of radionuclides from irradiated targets
  6. Radioiodination and biological evaluation of Cimetidine as a new highly selective radiotracer for peptic ulcer disorder detection
  7. Astatine-211 labelled a small molecule peptide: specific cell killing in vitro and targeted therapy in a nude-mouse model
  8. Impact of foaming agent and nanoparticle fillers on the properties of irradiated rubber
  9. Development of SiO2 based doped with LiF, Cr2O3, CoO4 and B2O3 glasses for gamma and fast neutron shielding
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