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The diffusion of 75Se(IV) in Beishan granite – temperature, oxygen condition and ionic strength effects

  • Chunli Wang , Xiaoyu Yang , Jiangang He , Fangxin Wei , Zhong Zheng und Chunli Liu EMAIL logo
Veröffentlicht/Copyright: 31. August 2018
Radiochimica Acta
Aus der Zeitschrift Radiochimica Acta Band 107 Heft 1

Abstract

To explore the diffusion behavior of 75Se(IV) in Beishan granite (BsG), the influences of temperature, oxygen condition and ionic strength were investigated using the through-diffusion experimental method. The effective diffusion coefficient De of 75Se(IV) in BsG varied from 4.21×10−14 m2/s to 3.19×10−13 m2/s in our experimental conditions, increased with increasing temperature. The formation factor Ff of BsG was calculated to be nearly constant in the range of temperatures investigated, suggesting that the inner structure of BsG had no significant change in the temperature range of 20–55°C. Meanwhile, the De values of 75Se(IV) in BsG under anaerobic condition was significantly larger than that under aerobic condition, which may be attributed to the difference in the sorption characteristics and species distribution of Se and pH values. Moreover, the diffusion of 75Se(IV) was promoted with ionic strength increased from 0.01 M to 0.1 M, and then decreased at 0.5 M, mainly due to the combined effects of reduced double layers with increased ionic strength and increase of the solution viscosity at higher ionic strength.

Keywords: Diffusion; Se-75; Beishan granite (BsG); temperature; oxygen condition; ionic strength

Funding source: National Natural Science Foundation of China

Award Identifier / Grant number: 11075006

Award Identifier / Grant number: U1730245

Funding statement: The project was jointly supported by the National Natural Science Foundation of China (Grant Nos. 11075006, U1730245), Special Foundation for High-level Waste Disposal (2007-840), the Fundamental Research Funds for the Central Universities, Analysis foundation of Peking University (13-18) and the 111 projects.

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Received: 2018-04-13
Accepted: 2018-07-20
Published Online: 2018-08-31
Published in Print: 2018-12-19

©2019 Walter de Gruyter GmbH, Berlin/Boston

Artikel in diesem Heft

  1. Frontmatter
  2. Development of nuclear chemistry at Mainz and Darmstadt
  3. Extraction behavior of rutherfordium as a cationic fluoride complex with a TTA chelate extractant from HF/HNO3 acidic solutions
  4. Measurements of activation cross sections by cyclic activation method for (n,2n) reaction on 144Sm isotope around 14 MeV neutron energy
  5. The diffusion of 75Se(IV) in Beishan granite – temperature, oxygen condition and ionic strength effects
  6. Kinetic and equilibrium studies of Cs(I), Sr(II) and Eu(III) adsorption on a natural sandy soil
  7. Development and application of carbon nanotubes reinforced hydroxyapatite composite in separation of Co(II) and Eu(III) ions from aqueous solutions
  8. Evaluation of radiation absorption capacity of some soil samples
https://doi.org/10.1515/ract-2018-2969
Schlagwörter für diesen Artikel
Diffusion; Se-75; Beishan granite (BsG); temperature; oxygen condition; ionic strength

Artikel in diesem Heft

  1. Frontmatter
  2. Development of nuclear chemistry at Mainz and Darmstadt
  3. Extraction behavior of rutherfordium as a cationic fluoride complex with a TTA chelate extractant from HF/HNO3 acidic solutions
  4. Measurements of activation cross sections by cyclic activation method for (n,2n) reaction on 144Sm isotope around 14 MeV neutron energy
  5. The diffusion of 75Se(IV) in Beishan granite – temperature, oxygen condition and ionic strength effects
  6. Kinetic and equilibrium studies of Cs(I), Sr(II) and Eu(III) adsorption on a natural sandy soil
  7. Development and application of carbon nanotubes reinforced hydroxyapatite composite in separation of Co(II) and Eu(III) ions from aqueous solutions
  8. Evaluation of radiation absorption capacity of some soil samples
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