Journal of Radioanalytical and Nuclear Chemistry
Volume/Issue:
Volume 248: Issue 2
Thermodynamic modeling of actinide complexation with oxalate at high ionic strength
Authors:
M. Borkowski

Search for other papers by M. Borkowski in
Current site
Google Scholar
PubMed Close
,
R. Moore Sandia National Laboratories, MS 0733 Albuquerque NM 87185-0733 USA

Search for other papers by R. Moore in
Current site
Google Scholar
PubMed Close
,
M. Bronikowski Florida State University Department of Chemistry Tallahassee FL 32306 USA

Search for other papers by M. Bronikowski in
Current site
Google Scholar
PubMed Close
,
Jianfeng Chen Florida State University Department of Chemistry Tallahassee FL 32306 USA

Search for other papers by Jianfeng Chen in
Current site
Google Scholar
PubMed Close
,
O. Pokrovsky Florida State University Department of Chemistry Tallahassee FL 32306 USA

Search for other papers by O. Pokrovsky in
Current site
Google Scholar
PubMed Close
,
Yuanxian Xia Florida State University Department of Chemistry Tallahassee FL 32306 USA

Search for other papers by Yuanxian Xia in
Current site
Google Scholar
PubMed Close
, and
G. Choppin Florida State University Department of Chemistry Tallahassee FL 32306 USA

Search for other papers by G. Choppin in
Current site
Google Scholar
PubMed Close
Pages:
467–471
Online Publication Date:
29 Oct 2004
Publication Date:
17 May 2001
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1010665116893
Restricted access

Abstract  

A geochemical model describing the solubility of actinides in underground water at the Waste Isolation Pilot Plant (WIPP) Project is under development. The database for this model consists of standard chemical potentials and Pitzer model parameters for hundreds of species that may be present in the WIPP disposal room. Organic ligands used in separation and decontamination processes may be present in the nuclear wastes placed in the WIPP site and could have a significant impact on mobile actinide concentrations. In this work the 1 and 2 stability constants of NpO2+, UO22+, Am3+ and Th4+ with the oxalate anion have been measured in 0.3–5.0M NaCl media at 25 °C by a solvent extraction technique. For the 1:1 complexation, the values of the stability constants increased in the order: NpO2+<Am3+<UO22+<Th4+, in accordance with the actinide charge density and reflecting the strongly ionic bonding of the complexes. The Pitzer ionic interaction model was used to model the data. Because the data were collected mainly in the high ionic strength region, values of (1) were estimated from these plus literature values. The Pitzer model gives a good representation of the data using three interaction parameters (0), (1), and c.

  • Collapse
  • Expand
Cover Journal of Radioanalytical and Nuclear Chemistry
Journal of Radioanalytical and Nuclear Chemistry
Print ISSN:
0236-5731
Online ISSN:
1588-2780

To see the editorial board, please visit the website of Springer Nature.

Manuscript Submission: HERE

For subscription options, please visit the website of Springer Nature.

Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation		 1968
Volumes
per Year		 1
Issues
per Year		 12
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)

Monthly Content Usage

Abstract Views Full Text Views PDF Downloads
Aug 2024 9 0 0
Sep 2024 10 0 0
Oct 2024 25 0 0
Nov 2024 4 0 0
Dec 2024 5 0 0
Jan 2025 10 0 0
Feb 2025 0 0 0