Sorption of uranium and cesium by Hanford basalts and associated secondary smectite

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doi: 10.1016/0009-2541(82)90002-X
Authors:Ames, L. L.; McGarrah, J. E.; Walker, B. A.; Salter, P. F.
Author Affiliations:Primary:
Pacific Northwest Lab., Richland, WA 99352, United States
Volume Title:Chemical Geology
Source:Chemical Geology, 35(3-4), p.205-225. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0009-2541
Publication Date:1982
Note:In English. 2 p. refs.; illus. incl. table
Summary:Three basalts and an associated secondary smectite were used in U and Cs sorption studies as part of an investigation into the feasibility and safety of disposal of radioactive U-fuel assemblies in a deep basalt repository. Experiments with two synthetic basalt groundwaters at 23° and 60°C showed that increase in T caused a decrease in Cs sorption maxima on all solids from both groundwaters and an increase in U sorption maxima, especially from higher carbonate-content groundwater. Sorption energies were characteristic of ion-exchange for both Cs and U sorption processes. U sorption maxima for basalt were insignificant, but smectite U sorption maxima surpasses Cs sorption maxima in both groundwaters at 60°C. The uranyl carbonate complexes may thus be relatively T-sensitive. On removal of excess Fe-oxides from the secondary smectite, U sorption decreased and the Dubinin - Radushkevich isotherm reverted to a normal Freundlich sorption isotherm. Removal of excess Fe-oxides from the basalts and secondary smectite would probably result in Freundlich sorption isotherms for both Cs and U.
Subjects:Actinides; Adsorption; Alkali metals; Basalts; Cenozoic; Cesium; Clay mineralogy; Clay minerals; Columbia River Basalt Group; Engineering geology; Environmental geology; Experimental studies; Geochemistry; Ground water; Igneous rocks; Ion exchange; Metals; Miocene; Neogene; Processes; Radioactive waste; Secondary minerals; Sheet silicates; Silicates; Smectite; Sorption; Temperature; Tertiary; Uranium; Volcanic rocks; Waste disposal; Hanford Site; United States; Washington; Basalt Waste Isolation Project
Record ID:1983021177
Copyright Information:GeoRef, Copyright 2018 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom, Reference includes data from PASCAL, Institute de l'Information Scientifique et Technique
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