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 00:00:00 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; TRN: US1700220
• Resource Relation: Conference: 2016 ACS Spring Meeting, San Diego, CA (United States), 13 Mar 2016
• Country of Publication: United States
• Language: English

Related Subjects

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