Gray hornblende schist

Rock-equilibrated water was produced by allowing distilled water to be in contact with granulated gray hornblende schist for a period of several days. The solution produced was filtered through a 0.4 pm NUCLEPORE filter before use. Analysis of the resulting solution showed that rock equilibrated-water contained 48 mg/L total solids (dried at 180°C). The E of the solution was measured to be 0.275 V. The pH of the gray hornblende schist equilibrated water was measured to be 7.6 at the time of the first adsorption experiment. Thereafter the solution pH was maintained at 7.5-7.7. 

Equilibrium Partitioning Experiments. The equilibrium partitioning of americium-III between gray hornblende schist and rock equilibrated water was determined in batch partitioning experiments with rectangular blocks of gray hornblende schist ( 5). The surface area sorption coefficient, K, was determined to be 4.5 . 5 mL/cm where... 

Fissure Elution Experiments. The migration characteristics of americium by water transport in fissures fabricated from gray hornblende schist were determined. Fissures not used in the previous sorption experiments were used for these elution experiments. A diagram of the experimental apparatus is shown in Figure 4. Solution reservoirs were attached above the fissures and the small bore tubes affixed to the bottom of the fissures were connected to solution metering pumps. 

Table I. Am Adsorption by Gray Hornblende Schist Fissure Experiments (static)...

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