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Sorption of Eu(III) at feldspar/water interface: effects of pH, organic matter, counter ions, and temperature

  • Ping Li , Hanyu Wu , Jianjun Liang , Zhuoxin Yin , Duoqiang Pan , Qiaohui Fan EMAIL logo , Di Xu EMAIL logo and Wangsuo Wu
Published/Copyright: June 29, 2017
Radiochimica Acta
From the journal Radiochimica Acta Volume 105 Issue 12

Abstract

The sorption of Eu(III) on potassium feldspar (K-feldspar) was studied under various physicochemical conditions such as pH, temperature, counter ions and organic matter. The results showed that the sorption of Eu(III) on K-feldspar significantly increased with the increase of pH, and high Eu(III) concentration can inhibit such immobility to some extent. The presence of humic acid (HA) can increase the sorption of Eu(III) on K-feldspar in low pH range; while inhibit to a large extent under alkaline conditions. It is very interesting that at pH ~6.5, high ionic strength can promote the sorption of Eu(III) on K-feldspar in the presence of HA. In contrast, Eu(III) sorption was restricted obviously by NaCl in the absence of HA. The sorption procedure was involved with ion exchange and/or outer-sphere complexation as well as inner-sphere complexation. The presence of F− and PO43− dramatically enhanced Eu(III) sorption on K-feldspar, whereas both SO42− and CO32− had negative effects on Eu(III) sorption. X-ray photoelectron spectroscopy analysis indicated that Eu(III) tended to form hydrolysates at high initial concentration (3×10−4 mol/L) and high temperature (338 K).

Keywords: Feldspar; Eu(III); sorption; humic acid; XPS

Acknowledgements

This work gets supports from the National Natural Science Foundation of China (21601169, 41573128, 21601179), the “100-Talent” program from Chinese Academy of Science in Lanzhou Center for Oil & Gas Resources, Institute of Geology and Geophysics, CAS “Light of West China” Program as well as the Key Laboratory of Special Function Materials and Structure Design, Ministry of Education.

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Supplemental Material:

The online version of this article (DOI: https://doi.org/10.1515/ract-2017-2797) offers supplementary material, available to authorized users.

Received: 2017-3-23
Accepted: 2017-4-24
Published Online: 2017-6-29
Published in Print: 2017-11-27

©2017 Walter de Gruyter GmbH, Berlin/Boston

Articles in the same Issue

  1. Frontmatter
  2. Excitation functions of proton induced nuclear reactions on natFe up to 16 MeV, with emphasis on radiochemical determination of low cross sections
  3. A new optical sensor for spectrophotometric determination of uranium (VI) and thorium (IV) in acidic medium
  4. Removal of U(VI) from aqueous solution using TiO2 modified β-zeolite
  5. Removal of uranium from ammonium nitrate solution by nanofiltration
  6. Biosorption of strontium ions from aqueous solution using modified eggshell materials
  7. Effects of synthesis conditions on ion exchange properties of α-zirconium phosphate for Eu and Am
  8. Effect on Cs removal of solid-phase metal oxidation in metal ferrocyanides
  9. Sorption of Eu(III) at feldspar/water interface: effects of pH, organic matter, counter ions, and temperature
  10. Sonication assisted dissolution of post-detonation nuclear debris using ammonium bifluoride
  11. Scale-up of high specific activity 186gRe production using graphite-encased thick 186W targets and demonstration of an efficient target recycling process
https://doi.org/10.1515/ract-2017-2797
Keywords for this article
Feldspar; Eu(III); sorption; humic acid; XPS

Articles in the same Issue

  1. Frontmatter
  2. Excitation functions of proton induced nuclear reactions on natFe up to 16 MeV, with emphasis on radiochemical determination of low cross sections
  3. A new optical sensor for spectrophotometric determination of uranium (VI) and thorium (IV) in acidic medium
  4. Removal of U(VI) from aqueous solution using TiO2 modified β-zeolite
  5. Removal of uranium from ammonium nitrate solution by nanofiltration
  6. Biosorption of strontium ions from aqueous solution using modified eggshell materials
  7. Effects of synthesis conditions on ion exchange properties of α-zirconium phosphate for Eu and Am
  8. Effect on Cs removal of solid-phase metal oxidation in metal ferrocyanides
  9. Sorption of Eu(III) at feldspar/water interface: effects of pH, organic matter, counter ions, and temperature
  10. Sonication assisted dissolution of post-detonation nuclear debris using ammonium bifluoride
  11. Scale-up of high specific activity 186gRe production using graphite-encased thick 186W targets and demonstration of an efficient target recycling process
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