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

The degree of conservatism in the estimated sorption partition coefficients (Kds) 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).
Authors:
 [1] ;  [1] ;  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
OSTI Identifier:
1225281
Report Number(s):
LA-UR--15-28499
TRN: US1700220
DOE Contract Number:
AC52-06NA25396
Resource Type:
Conference
Resource Relation:
Conference: 2016 ACS Spring Meeting, San Diego, CA (United States), 13 Mar 2016
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE/LANL
Country of Publication:
United States
Language:
English
Subject:
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