Mineral: |
amorphous Silica |
Reference: |
CRCO08 |
SCM Type: |
TL - Triple Layer |
Ligand: |
Sr<2+>
- strontium
|
Site Type: |
»Si-OH |
Equation: |
4 »Si-OH + Sr<2+> ⇔ (»Si-OH)2 (»Si-O)2-Sr + 2 H<1+> |
LogK: |
12.2 LogK°I=0 (Conversion to I = 0): 12.41
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
0.1 mol/L
NaCl
|
Temperature: |
298.13 K |
Solid/Liquid Ratio: |
40.0 g/L |
pH Range: |
3-10 |
Ligand Concentration Range: |
1E-3 - 7E-7 mol/L |
Fit Method: |
FITEQL |
Comment: |
calulated value equ. 1 according [S05] 1. 4 »Si-O<1-> + Sr<2+> = (»Si-OH)2 (»Si-O)2-Sr + H<1+> logK=19.2 2. »Si-OH = »Si-O<1-> + H<1+> pK2 = -logK = 7.0 3. sum 4 »Si-OH + Sr<2+> = (»Si-OH)2 (»Si-O)2-Sr + 2 H<1+> logK = 19.2 - 7.0 = 12.2 |
|