Effect of oxidation state and ionic strength on sorption of actinides (Th, U, Np, Am) to geologic media [Abstract and References Only]

Conference · Fri Oct 30 04:00:00 EDT 2015

OSTI ID:1225281

Dittrich, Timothy M. ^[1]; Richmann, Michael K. ^[1]; Reed, Donald T. ^[1]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

The degree of conservatism in the estimated sorption partition coefficients (K_ds) used in a performance assessment model is being evaluated based on a complementary batch and column method. The main focus of this work is to investigate the role of ionic strength, solution chemistry, and oxidation state (III-VI) in actinide sorption to dolomite rock. Based on redox conditions and solution chemistry expected at the WIPP, possible actinide species include Pu(III), Pu(IV), U(IV), U(VI), Np(IV), Np(V), Am(III), and Th(IV).

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE/LANL
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 1225281
• Report Number(s): LA-UR--15-28499
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
54 ENVIRONMENTAL SCIENCES
CHEMISTRY
ELECTROMOTIVE FORCE
EVALUATION
Earth Sciences
LIMESTONE
OXIDATION
PARTITION
PERFORMANCE
SOLUTIONS
SORPTION
THORIUM
URANIUM
NEPTUNIUM
AMERICIUM
VALENCE
WIPP
dolomite
Culebra
reactive transport
ionic strength