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Title: Sorption of Np (V) by U (VI) hydroxide solids

Abstract

The distribution of {sup 237}Np(V) between aqueous NaHCO{sub 3} solutions and U(VI) hydroxide solids was investigated. Experiments were initiated by addition of U solids to Np solutions and by coprecipitation of U and Np. Analysis by U L{sub III} extended X-ray absorption fine structure (EXAFS) spectroscopy and infrared absorption spectroscopy indicated the solid phase was synthetic schoepite. Equilibrium Np distribution coefficients were 5-44 mL/g in the pH range 6-8. The results are consistent with adsorption of Np by the solids and provide no evidence of Np incorporation in the bulk solid.

Authors:
; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (US)
Sponsoring Org.:
USDOE Office of Defense Programs (DP) (US)
OSTI Identifier:
14942
Report Number(s):
UCRL-JC-135791; YN0100000
YN0100000; TRN: AH200130%%187
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 7th International Conference on the Chemistry and Migration Behavior of Actinides and Fission Products in the Geosphere, Lake Tahoe, NV (US), 09/27/1999--10/01/1999; Other Information: PBD: 20 Sep 1999
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION; ABSORPTION SPECTROSCOPY; ACTINIDES; ADSORPTION; CHEMISTRY; COPRECIPITATION; DISTRIBUTION; FINE STRUCTURE; FISSION PRODUCTS; HYDROXIDES; SCHOEPITE; SORPTION; SPECTROSCOPY

Citation Formats

Wruck, D A, Brachmann, A, Sylwester, E, and Allen, C E A. Sorption of Np (V) by U (VI) hydroxide solids. United States: N. p., 1999. Web.
Wruck, D A, Brachmann, A, Sylwester, E, & Allen, C E A. Sorption of Np (V) by U (VI) hydroxide solids. United States.
Wruck, D A, Brachmann, A, Sylwester, E, and Allen, C E A. Mon . "Sorption of Np (V) by U (VI) hydroxide solids". United States. https://www.osti.gov/servlets/purl/14942.
@article{osti_14942,
title = {Sorption of Np (V) by U (VI) hydroxide solids},
author = {Wruck, D A and Brachmann, A and Sylwester, E and Allen, C E A},
abstractNote = {The distribution of {sup 237}Np(V) between aqueous NaHCO{sub 3} solutions and U(VI) hydroxide solids was investigated. Experiments were initiated by addition of U solids to Np solutions and by coprecipitation of U and Np. Analysis by U L{sub III} extended X-ray absorption fine structure (EXAFS) spectroscopy and infrared absorption spectroscopy indicated the solid phase was synthetic schoepite. Equilibrium Np distribution coefficients were 5-44 mL/g in the pH range 6-8. The results are consistent with adsorption of Np by the solids and provide no evidence of Np incorporation in the bulk solid.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {9}
}

Conference:
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