Chemical Interaction of Fresh and Saline Waters with Compacted Bentonite

摘要

The interaction of compacted sodium bentonite with fresh and saline ground-watersimulant was studied. The parameters varied in the experiments were the compositions of the solutions and oxygen and carbon dioxide content in the surroundings. The main interests of the study were the chemical changes in the experimental solution, bentonite porewater, and bentonite together with the microstructural properties of bentonite. The major processes with fresh water were the diffusion of the sodium, potassium, sulfate and bicarbonate, from bentonite into the solution, and the diffusion of calcium from the solution into bentonite.