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Kerisit, Sebastien N.
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article
Impacts of glass composition, pH, and temperature on glass forward dissolution rate
Abstract
Glass dissolution: Comprehending composition effects The effect that environment and composition has on the rate of decay of nuclear waste storage glasses in aqueous solution has been studied. Borosilicate glasses are often used as containment matrices for the disposal of radioactive waste. Their interaction with water is the likeliest method by which they could release their radioactive cargo, therefore it is important to understand the conditions under which glasses corrode. Now John Vienna and colleagues from Pacific Northwest National Laboratory, have studied how pH, temperature and glass composition affect the rate at which various glasses dissolve. By measuring the dissolution rate of a test glass, comparing it with other glasses, and carrying out some modeling, they showed that 90% of the variation in dissolution rate could be accounted for by temperature and pH effects – thus any compositional effects are relatively small.