Mineral: |
Goethite |
Reference: |
CRCO08 |
SCM Type: |
TL - Triple Layer |
Ligand: |
Sr<2+>
- strontium
|
Site Type: |
»Fe-OH |
Equation: |
4 »Fe-OH + 2 Sr<2+> ⇔ (»Fe-OH)2 (»Fe-O)2-(Sr)2<2+> + 2 H<1+> |
LogK: |
9.5 LogK°I=0 (Conversion to I = 0): 10.14
LogK2.31 nm−2 (SSD-normalized): 13.25
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
0.1 mol/L
NaCl
|
Temperature: |
298.13 K |
Solid/Liquid Ratio: |
40.0 g/L |
pH Range: |
4-10 |
Ligand Concentration Range: |
1E-3 - 1E-6 mol/L |
Fit Method: |
FITEQL |
Comment: |
calulated value equ. 1 according [S05] 1. 4 »Fe-O<1-> + 2 Sr<2+>=(»Fe-OH)2 (»Fe-O)2-(Sr)2 + H<1+> logK=15.9 2. »Fe-OH = »Fe-O<1-> + H<1+> pK2 = -logK = 6.4 3. sum 4 »Fe-OH + 2 Sr<2+> = (»Fe-OH)2 (»Fe-O)2-(Sr)2<2+> + 2 H<1+> logK= 15.9 - 6.4 = 9.5 |
|