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Adsorption behavior of U(VI) on doped polyaniline: the effects of carbonate and its complexes

  • Jun Liu , Changsong Zhao , Guoyuan Yuan , Feize Li , Jijun Yang EMAIL logo , Jiali Liao , Yuanyou Yang and Ning Liu EMAIL logo
Published/Copyright: February 5, 2018
Radiochimica Acta
From the journal Radiochimica Acta Volume 106 Issue 6

Abstract

In carbonate-buffer seawater or salt lake brines, three main uranium complexes, U(VI)-CO3 and Ca/Mg-U(VI)-CO3 complexes had been highlighted so far. In this paper, the effects of carbonate and its complexes on U(VI) adsorption onto doped polyaniline (PANI) were investigated using batch adsorption experiments. The adsorption equilibrium of U(VI) on doped PANI was reached within 30 min of contact time when U(VI)-CO3 complexes dominated the aqueous chemistry. Pseudo-second order and Langmuir isotherm models indicated that adsorption occurred on the homogeneous surface via monolayer chemisorption. Moreover, the increase in pHinitial, dissolved carbonate, calcium and magnesium concentrations could suppress the uranium adsorption process. The adsorption mechanisms under the weakly basic conditions were primarily involved in uranium anion species adsorption on nitrogen-containing functional groups instead of the anion exchange reactive sites on the doped PANI surface sites, whereas the U(VI)-CO3 complexes had a greater affinity than the Ca/Mg-U(VI)-CO3 complexes. The findings of this study are significant for the extraction of uranium resources from salt lake brines or seawater and for the prediction of uranium adsorption behaviors in weakly basic solution environments.

Keywords: U(VI)-CO3 complexes; Ca/Mg-U(VI)-CO3 complexes; doped polyaniline; adsorption mechanisms

Acknowledgments

This work was supported by the Joint Funds of the National Natural Science Foundation of China and the China Academy of Engineering Physics (NSAF, Grant no. U1330125) and the National Fund of China for Fostering Talents in Basic Science (J1210004).

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Received: 2017-8-14
Accepted: 2017-12-11
Published Online: 2018-2-5
Published in Print: 2018-6-27

©2018 Walter de Gruyter GmbH, Berlin/Boston

Articles in the same Issue

  1. Frontmatter
  2. Adsorption behavior of U(VI) on doped polyaniline: the effects of carbonate and its complexes
  3. Comparison of univariate and multivariate data analysis models for uranium quantification in Trombay historical nuclear waste glass
  4. Efficient decontamination of naturally occurring radionuclide from aqueous carbonate solutions by ion flotation process
  5. Partitioning of Cs+ and Na+ ions by dibenzo-18-crown-6 ionophore in biphasic aqueous systems of octanol and ionic liquid
  6. Isolation of high purity 73Se using solid phase extraction after selective 4,5-[73Se]benzopiazselenol formation with aminonaphthalene
  7. Production, quality control, biodistribution and imaging studies of 177Lu-PSMA-617 in breast adenocarcinoma model
  8. Assessment of rare earth elements, Th and U profile of a site for a potential coal based power plant by instrumental neutron activation analysis
  9. Neutron activation analysis of major and trace elements in Arabica and Robusta coffee beans samples consumed in Algeria
https://doi.org/10.1515/ract-2017-2865
Keywords for this article
U(VI)-CO3 complexes; Ca/Mg-U(VI)-CO3 complexes; doped polyaniline; adsorption mechanisms

Articles in the same Issue

  1. Frontmatter
  2. Adsorption behavior of U(VI) on doped polyaniline: the effects of carbonate and its complexes
  3. Comparison of univariate and multivariate data analysis models for uranium quantification in Trombay historical nuclear waste glass
  4. Efficient decontamination of naturally occurring radionuclide from aqueous carbonate solutions by ion flotation process
  5. Partitioning of Cs+ and Na+ ions by dibenzo-18-crown-6 ionophore in biphasic aqueous systems of octanol and ionic liquid
  6. Isolation of high purity 73Se using solid phase extraction after selective 4,5-[73Se]benzopiazselenol formation with aminonaphthalene
  7. Production, quality control, biodistribution and imaging studies of 177Lu-PSMA-617 in breast adenocarcinoma model
  8. Assessment of rare earth elements, Th and U profile of a site for a potential coal based power plant by instrumental neutron activation analysis
  9. Neutron activation analysis of major and trace elements in Arabica and Robusta coffee beans samples consumed in Algeria
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