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Evaluation of saponite and saponite/sepiolite fluids for geothermal drilling

Description: The rheology and other properties of drilling fluids containing saponite and a saponite-sepiolite mixture as the main vicosifier have been systematically evaluated in the temperature range of 300-600{degree}F under appropriate confining pressures up to 16,000 psi. Saponite represents the magnesium analog of the clay mineral montmorillonite, which is the main constituent in conventional bentonite-based fluids. The fluid with 6% saponite exhibits a prominent viscosity enhancement at temperatures … more
Date: February 1, 1991
Creator: Guven, N.; Panfil, D. J. & Carney, L. L. (Texas Tech Univ., Lubbock, TX (USA). Dept. of Geosciences)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Study on the Effect of Clay Particle Orientation on Diffusion in Compacted Bentonite

Description: In this study, the effect of the orientation of clay particles on diffusion in compacted bentonite, which is regarded to be quite important as a candidate buffer material in safety assessment for a geological disposal of high-level radioactive waste, was experimentally discussed by investigating effective diffusion coefficients (De) for tritiated water (HTO), which is non-sorptive onto bentonite. The diffusion experiments were carried out for 2 kinds of smectite contents of Na-bentonites, Kunig… more
Date: February 26, 2002
Creator: Sato, H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The structure of actinide ions exchanged into native and modified zeolites and clays

Description: X-ray absorption spectroscopy (XAS) has been used to investigate the structure and valence of thorium (Th{sup 4+}) and uranyl (UO{sub 2}{sup 2+}) cations exchanged into two classes of microporous aluminosilicate minerals: zeolites and smectite clays. XAS is also employed to examine the fate of the exchanged cations after modification of the mineral surface using self-assembled organic films and/or exposure to hydrothermal conditions. These treatments serve as models for the forces that ultimate… more
Date: February 16, 2000
Creator: Wasserman, S. R.; Soderholm, L. & Giaquinta, D. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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