Chapter 4
potential change of kaolinite. But adding meta-silicate has smaller effect on pH
change than adding ortho-silicate. Adding 3.0×10'4 M Na2SiO3, pH of the brine
increases from 8.3 to 9.0. Adding 3.0×10^4 M Na4SiO4, pH of the brine increases
from 8.3 to 9.2. Equilibrium constants Кнэюз and Kh3S∣O4 are 13.7 m3∕mol and 8.7
m3∕mol, respectively.
O |
O With Ca/ Mg, experiment data * No Ca/ Mg, experiment data |
∖4 ʌ* S, ♦ ^H3SiO4 “ θ'7 |
O |


140
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