Thesis (M.S. in soil science)--Washington State University, May 2010. / Title from PDF title page (viewed on July 8, 2010). "Department of Crop and Soil Sciences." Includes bibliographical references (p. 31-33).

No description available.

Thesis (M.S. - Hydrology and Water Resources)--University of Arizona, 1990. / Includes bibliographical references (leaves 117-122).

Thesis (M.Ag.Sci. 1977) from the Department of Agricultural Biochemistry, University of Adelaide.

Thesis (M.S.)--University of California, Santa Cruz, 1994. / Typescript. Includes bibliographical references (leaves 83-85).

Thesis--University of Adelaide. / Bibliography: leaves 181-189.

<p> The short term (5000 hours) stability of illite and montmorillonite in sea water was studied by suspending 5.00 gm. aliquots of A.P.I. reference clays Montmorillonite # 25b and Illite # 35 in 500 ml. of artificial sea water (tradename "Instant Ocean") . After 5000 hours, in the montmorillonite samples, Ca and Si concentrations had increased (0.490 mmoles/l and 0.289 mmoles/l respectively), the cation exchange capacity had decreased (104.36 meq/100 gms. to 81.42 meq/100 gms.), the pH had decreased (8.40 to 7.94) but no major mineralogical change was observed. After 5000 hours, in the illite samples, Si concentration had increased (0.045 mmoles/l), the cation exchange capacity remained the same, the pH increased (7.22 to 7.60) and no major mineralogical change was observed. The release of Ca in the illite samples was complicated by the dissolution of calcite and significant changes in concentration of other cations (Na, K, Mg) were not observed.</p> <p> The data for Si, cation exchange and exchangeable cations are compared to that of Lewis (1950), Whitehouse and McCarter (1956), Carrol and Starkey (1958), MacKenzie et al (1965) (1967) and Russell (1970), a model developed by Houston (1972) is used to explain the Ca and Si data for the montmorillonite samples, and the implications of the apparent stability of these minerals to the case for authigenic clay formation from detrital material are discussed.</p> / Thesis / Bachelor of Science (BSc)

Thesis (Ph.D.)--Memorial University of Newfoundland. / Typescript. Restricted until May 1997. Bibliography: leaves 218-234. Also available online.

Thesis (Ph. D.)--University of California, Santa Cruz, 1993. / Typescript. Includes bibliographical references.

Both crystalline and sedimentary rocks are being considered as potential host rocks for a deep geological repository in Canada. Deep-seated sedimentary rocks in the Michigan Basin, Ontario, Canada contain highly saline ground and pore waters. The relatively high I of these waters may influence speciation and rock matrix sorption properties. To this end, laboratory sorption experiments were conducted to examine sorption of Pd(II) on sodium bentonite, illite and Ordovician age shale as a function of pH and solution I and initial concentration of Pd. Solutions with pH values in the range of 5 to 9, I ranging from 0.1 to 4 M and initial concentration of Pd ranging from 5×10 −8 to 1×10 −6 M were considered. A sorption time of 14 days was used and the separation method was by centrifuge. Experiments were performed under aerobic conditions at 25 ◦ CC, and the Eh value of the solution ranged from 300 to 600 mV. The data from sorption experiments were used to validate surface complexation models developed in PHREEQC with the JAEA TDB. The sorption of Pd on bentonite, shale and illite all showed strong dependence on I and pH. The dependence on initial concentration of Pd was used to plot sorption isotherms. The slope of the isotherms showed that Pd was forming inner- and outer- sphere complexes inside the stern layer for sorption onto bentonite and illite. It also showed however that shale was most likely undergoing cooperative sorption. Strong fit was found between the single layer surface complexation model for montmorillonite (the major constituent clay mineral of sodium bentonite) and experimental data, but not for illite (the major constituent clay mineral of shale). / Thesis / Master of Applied Science (MASc)