Abstract
We report the modelling and experimental studies of SON68 glass dissolution in hyperalkaline solution (pH = 13.7) at 30 and 70 °C for more than 300 days. In the experiments at 30 °C and the first 100 days at 70 °C, the concentrations of B, Mo, alkalis and even Si showed square root of time dependence indicative of a diffusion-controlled process. At 70 °C fast dissolution resumed after about 100 days due to crystallization of aluminosilicates, and glass dissolution became surface reaction-controlled. For the experiment at 30 °C, a simple model coupling dissolution of the glass and precipitation of secondary phases can also produce a good result for non-conservative elements, such as Ca and Al.
Details
Original language | English |
---|
Pages (from-to) | 302-311 |
---|
Number of pages | 9 |
---|
Journal | Applied Geochemistry |
---|
Volume | 61 |
---|
Issue number | 10 |
---|
DOIs | |
---|
Publication status | Published - Oct 2015 |
---|