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Title: Sorption and desorption of Cs(I), Sr(II), Eu(III), Nd(III), and Ce(IV) on Culebra dolomite

Authors:
 [1];  [1];  [1];  [1];  [1]
  1. Los Alamos National Laboratory
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Environmental Management (EM)
OSTI Identifier:
1371678
Report Number(s):
LA-UR-17-25823
DOE Contract Number:
AC52-06NA25396
Resource Type:
Conference
Resource Relation:
Conference: LANL Annual Student Symposium ; 2017-08-09 - 2017-08-09 ; Los Alamos, New Mexico, United States
Country of Publication:
United States
Language:
English
Subject:
Earth Sciences; dolomite, sorption, lanthanides

Citation Formats

Dugas, Michael Patrick, Dittrich, Timothy M., Zengotita, Frances, Emerson, Hilary Palmer, and Reed, Donald T.. Sorption and desorption of Cs(I), Sr(II), Eu(III), Nd(III), and Ce(IV) on Culebra dolomite. United States: N. p., 2017. Web.
Dugas, Michael Patrick, Dittrich, Timothy M., Zengotita, Frances, Emerson, Hilary Palmer, & Reed, Donald T.. Sorption and desorption of Cs(I), Sr(II), Eu(III), Nd(III), and Ce(IV) on Culebra dolomite. United States.
Dugas, Michael Patrick, Dittrich, Timothy M., Zengotita, Frances, Emerson, Hilary Palmer, and Reed, Donald T.. Fri . "Sorption and desorption of Cs(I), Sr(II), Eu(III), Nd(III), and Ce(IV) on Culebra dolomite". United States. doi:. https://www.osti.gov/servlets/purl/1371678.
@article{osti_1371678,
title = {Sorption and desorption of Cs(I), Sr(II), Eu(III), Nd(III), and Ce(IV) on Culebra dolomite},
author = {Dugas, Michael Patrick and Dittrich, Timothy M. and Zengotita, Frances and Emerson, Hilary Palmer and Reed, Donald T.},
abstractNote = {},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jul 14 00:00:00 EDT 2017},
month = {Fri Jul 14 00:00:00 EDT 2017}
}

Conference:
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  • In the most transmissive parts of the Culebra Dolomite, fluid flow is controlled by fractures. Gypsum (CaSO{sub 4} 2H{sub 2}O) and corrensite (a mixed chlorite/smectite) are the most abundant fracture-fill minerals. Radionuclide/clay interactions may be the dominant mechanism for radionuclide retardation. For this reason, the focus of this study is to examine the extent of the sorption of uranium and plutonium onto clays within the Culebra matrix and fractures. This paper describes several coordinated activities which will evaluate the potential retardation of radionuclide migration by sorption onto clays within the Culebras. These include characterization of the compositions of clays andmore » groundwaters along the flow path; studies of the surface properties of simple reference clays and Culebra clays in dilute solutions and saline mixed electrolytes; development of a database of intrinsic equilibrium constants and specific-interaction parameters for calculations of the aqueous speciation of uranium and plutonium in Na-Cl-Ca-SO{sub 4}-CO{sub 3}-EDTA solutions which range in ionic strength from 0.1--4.0 molal; and measurement of surface complexation constants for uranium and plutonium in simple and mixed electrolyte solutions containing clays. 2 refs., 2 figs.« less
  • The variability of the sorption properties (characterized by the distribution coefficient K{sub d}) of a forest soil for Cs, Zn, Sr, Co, Cd, Ce, Ru, Tc, and I were determined along a transect of 150 m in regular intervals of 3 m. Radioactive tracers were used to ensure trace concentrations of these elements. For comparison, for each soil sample the loss on ignition, as a measure of the soil organic matter content, and the pH were also determined. On average, the K{sub d} values increase in the sequence Tc < I < Ru {approx} Co {approx} Zn {approx} Sr <more » Cd < Ce < Cs; the spatial variability in the sequence I < Zn {approx} Sr {approx} Co {approx} Cd {approx} Ru {approx} Te < Cs, and I {approx} Ce < Tc. Correlation analysis revealed that, when moving along the transect, the K{sub d} values for some elements changed in a similar, and for others in a dissimilar pattern. In a few case a correlation between the pH or the loss on ignition and the K{sub d} values was also present. The spatial structure of the data was examined by semivariograms. For the elements Co, Cd, Zn, and Sr, the K{sub d} values showed an almost periodic behavior along the transect, which is probably due to periodic changes of some soil properties in a forest with regularly spaced trees.« less