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Title: Complexation of Tc(IV) with $${\text{SO}}_{4}^{2–}$$ in NaCl Medium

Abstract

We report on the experimental determination of the stability constant for the complexation of the Tc(IV) cation by $${\text{SO}}_{4}^{2–}$$ at 1.0 mol kg -1 ionic strength (NaCl) and pcH 1.51 ± 0.05, using a solvent extraction method. This research represents a first step in determining unknown thermodynamic parameters for the complexation of Tc(IV) by simple polyatomic anions. Radiotracer studies were carried out with 99Tc and 35S, using both HDEHP and TOPO as extractants, to characterize the mechanism of the solvent extraction and to examine the extraction of the competing species, TcO(HSO 4)+ and TcOSO 4, into the organic phase. The apparent stability constant log 10β app for the complexation of Tc(IV) by sulfate was found to be 1.13 ± 0.04.

Authors:
 [1];  [1];  [1];  [1]; ORCiD logo [1]
  1. Washington State Univ., Pullman, WA (United States)
Publication Date:
Research Org.:
Washington State Univ., Pullman, WA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1529252
Grant/Contract Number:  
NA0002916
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Solution Chemistry
Additional Journal Information:
Journal Volume: 47; Journal Issue: 7; Journal ID: ISSN 0095-9782
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
Tc(IV); Sulfate stability constant; Solvent extraction; Radiotracers

Citation Formats

Parker, T. G., Omoto, T., Dickens, S. M., Wall, D. E., and Wall, N. A. Complexation of Tc(IV) with ${\text{SO}}_{4}^{2–}$ in NaCl Medium. United States: N. p., 2018. Web. doi:10.1007/s10953-018-0785-1.
Parker, T. G., Omoto, T., Dickens, S. M., Wall, D. E., & Wall, N. A. Complexation of Tc(IV) with ${\text{SO}}_{4}^{2–}$ in NaCl Medium. United States. doi:10.1007/s10953-018-0785-1.
Parker, T. G., Omoto, T., Dickens, S. M., Wall, D. E., and Wall, N. A. Mon . "Complexation of Tc(IV) with ${\text{SO}}_{4}^{2–}$ in NaCl Medium". United States. doi:10.1007/s10953-018-0785-1. https://www.osti.gov/servlets/purl/1529252.
@article{osti_1529252,
title = {Complexation of Tc(IV) with ${\text{SO}}_{4}^{2–}$ in NaCl Medium},
author = {Parker, T. G. and Omoto, T. and Dickens, S. M. and Wall, D. E. and Wall, N. A.},
abstractNote = {We report on the experimental determination of the stability constant for the complexation of the Tc(IV) cation by ${\text{SO}}_{4}^{2–}$ at 1.0 mol kg-1 ionic strength (NaCl) and pcH 1.51 ± 0.05, using a solvent extraction method. This research represents a first step in determining unknown thermodynamic parameters for the complexation of Tc(IV) by simple polyatomic anions. Radiotracer studies were carried out with 99Tc and 35S, using both HDEHP and TOPO as extractants, to characterize the mechanism of the solvent extraction and to examine the extraction of the competing species, TcO(HSO4)+ and TcOSO4, into the organic phase. The apparent stability constant log10βapp for the complexation of Tc(IV) by sulfate was found to be 1.13 ± 0.04.},
doi = {10.1007/s10953-018-0785-1},
journal = {Journal of Solution Chemistry},
number = 7,
volume = 47,
place = {United States},
year = {2018},
month = {7}
}

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