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Title: Co-extraction of Am(VI) and the major actinides with tributyl phosphate

Abstract

Sodium bismuthate was found to be an effective oxidant for Am in nitric acid solutions up to 6 M in concentration. However, in the presence of tributyl phosphate, americium was quickly reduced to the trivalent state, resulting in low distribution ratios. Pre-equilibration of the organic phase with bismuthate at the appropriate acid concentration was not effective at preventing americium reduction by tributyl phosphate. However, when a small amount of perchloric acid was added to the acidic, bismuthate-containing aqueous phase, much higher distribution ratios for americium extraction were achieved. Data comparing the extraction of americium to hexavalent uranium, neptunium and plutonium are presented. Slope analysis was used to confirm the extraction of americium in the hexavalent state. (authors)

Authors:
; ;  [1]
  1. Idaho National Laboratory, P.O. Box 1625, Idaho Falls, ID, 83413-7113 (United States)
Publication Date:
Research Org.:
American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
OSTI Identifier:
20979726
Resource Type:
Conference
Resource Relation:
Conference: Advanced nuclear fuel cycles and systems (GLOBAL 2007), Boise - Idaho (United States), 9-13 Sep 2007; Other Information: Country of input: France; 11 refs; Related Information: In: Proceedings of GLOBAL 2007 conference on advanced nuclear fuel cycles and systems, 1873 pages.
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; AMERICIUM; BISMUTH COMPOUNDS; NEPTUNIUM; NITRIC ACID; OXIDIZERS; OXYGEN COMPOUNDS; PERCHLORIC ACID; PLUTONIUM; REDUCTION; SODIUM COMPOUNDS; SOLVENT EXTRACTION; TBP; URANIUM

Citation Formats

Mincher, Bruce J, Martin, Leigh R, and Schmitt, Nicholas C. Co-extraction of Am(VI) and the major actinides with tributyl phosphate. United States: N. p., 2007. Web.
Mincher, Bruce J, Martin, Leigh R, & Schmitt, Nicholas C. Co-extraction of Am(VI) and the major actinides with tributyl phosphate. United States.
Mincher, Bruce J, Martin, Leigh R, and Schmitt, Nicholas C. 2007. "Co-extraction of Am(VI) and the major actinides with tributyl phosphate". United States.
@article{osti_20979726,
title = {Co-extraction of Am(VI) and the major actinides with tributyl phosphate},
author = {Mincher, Bruce J and Martin, Leigh R and Schmitt, Nicholas C},
abstractNote = {Sodium bismuthate was found to be an effective oxidant for Am in nitric acid solutions up to 6 M in concentration. However, in the presence of tributyl phosphate, americium was quickly reduced to the trivalent state, resulting in low distribution ratios. Pre-equilibration of the organic phase with bismuthate at the appropriate acid concentration was not effective at preventing americium reduction by tributyl phosphate. However, when a small amount of perchloric acid was added to the acidic, bismuthate-containing aqueous phase, much higher distribution ratios for americium extraction were achieved. Data comparing the extraction of americium to hexavalent uranium, neptunium and plutonium are presented. Slope analysis was used to confirm the extraction of americium in the hexavalent state. (authors)},
doi = {},
url = {https://www.osti.gov/biblio/20979726}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jul 01 00:00:00 EDT 2007},
month = {Sun Jul 01 00:00:00 EDT 2007}
}

Conference:
Other availability
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