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Title: Interaction of radionuclides with argillite from the Eleana Formation on the Nevada Test Site

Abstract

Distribution coefficients have been determined for {sup 137}Cs, {sup 85}Sr, {sup 144}Ce, {sup 99}Tc, {sup 152}Eu, {sup 238}Pu, {sup 244}Cm, and {sup 243}Am between argillite from the Eleana Formation on the Nevada Test Site (NTS) and several aqueous phases. Radionuclide concentrations in the range of 1 to 0.001 {mu}Ci/ml were used with contact times of 14, 28, and 56 days. Reaction mechanism, concentration effects, exchange capacity, equilibration times, and particle size effects were addressed in a more comprehensive study of the interaction of argillite with Cs in deionized water. The experimental parameters used in the distribution coefficient measurements were based in part on this work. The aqueous phases included a simulated groundwater with composition based on the analysis of a NTS groundwater, the same simulant and deionized water which were pre-equilibrated with powdered argillite, and a groundwater simulant with approximately the same qualitative composition of the NTS simulant, but with a higher ionic strength. A system to provide continuous pH control by CO{sub 2} addition during equilibration of the argillite-solution mixtures was designed and assembled. Initial experiments were done with Cs and Eu and the effects of pH on their distribution coefficients are discussed.

Authors:
;
Publication Date:
Research Org.:
Sandia Labs., Albuquerque, NM (United States)
OSTI Identifier:
59393
Report Number(s):
SAND-78-0893
TRN: 79:014362
DOE Contract Number:  
EY-76-C-04-0789
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Feb 1979
Country of Publication:
United States
Language:
English
Subject:
05 NUCLEAR FUELS; 54 ENVIRONMENTAL SCIENCES; ARGILLITE; SORPTIVE PROPERTIES; CESIUM 137; ADSORPTION; STRONTIUM 85; CERIUM 144; TECHNETIUM 99; EUROPIUM 152; PLUTONIUM 238; CURIUM 244; AMERICIUM 243; NEVADA TEST SITE; ROCKS; AQUEOUS SOLUTIONS; GROUND WATER; SIMULATION; PH VALUE; EXPERIMENTAL DATA; TABLES; Yucca Mountain Project

Citation Formats

Dosch, R G, and Lynch, A W. Interaction of radionuclides with argillite from the Eleana Formation on the Nevada Test Site. United States: N. p., 1979. Web. doi:10.2172/59393.
Dosch, R G, & Lynch, A W. Interaction of radionuclides with argillite from the Eleana Formation on the Nevada Test Site. United States. https://doi.org/10.2172/59393
Dosch, R G, and Lynch, A W. 1979. "Interaction of radionuclides with argillite from the Eleana Formation on the Nevada Test Site". United States. https://doi.org/10.2172/59393. https://www.osti.gov/servlets/purl/59393.
@article{osti_59393,
title = {Interaction of radionuclides with argillite from the Eleana Formation on the Nevada Test Site},
author = {Dosch, R G and Lynch, A W},
abstractNote = {Distribution coefficients have been determined for {sup 137}Cs, {sup 85}Sr, {sup 144}Ce, {sup 99}Tc, {sup 152}Eu, {sup 238}Pu, {sup 244}Cm, and {sup 243}Am between argillite from the Eleana Formation on the Nevada Test Site (NTS) and several aqueous phases. Radionuclide concentrations in the range of 1 to 0.001 {mu}Ci/ml were used with contact times of 14, 28, and 56 days. Reaction mechanism, concentration effects, exchange capacity, equilibration times, and particle size effects were addressed in a more comprehensive study of the interaction of argillite with Cs in deionized water. The experimental parameters used in the distribution coefficient measurements were based in part on this work. The aqueous phases included a simulated groundwater with composition based on the analysis of a NTS groundwater, the same simulant and deionized water which were pre-equilibrated with powdered argillite, and a groundwater simulant with approximately the same qualitative composition of the NTS simulant, but with a higher ionic strength. A system to provide continuous pH control by CO{sub 2} addition during equilibration of the argillite-solution mixtures was designed and assembled. Initial experiments were done with Cs and Eu and the effects of pH on their distribution coefficients are discussed.},
doi = {10.2172/59393},
url = {https://www.osti.gov/biblio/59393}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {2}
}