Mineral: |
Biotite |
Reference: |
TS96 |
SCM Type: |
DDL - Diffuse Double Layer |
Ligand: |
NpO2<1+>
- neptunyl(V)
|
Site Type: |
»Si-OH |
Equation: |
»Si-OH + NpO2<1+> + H2O ⇔ »Si-O-NpO2(OH)<1-> + 2 H<1+> |
LogK: |
-11.58 ± 0.02
LogK°I=0 (Conversion to I = 0): -11.58
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
0.0 mol/L
NaNO3
|
Temperature: |
303.15 K |
Solid/Liquid Ratio: |
1.0 g/L |
pH Range: |
4-11 |
Ligand Concentration Range: |
6E-6 mol/L |
Fit Method: |
FITEQL |
Comment: |
experimental data from [NS91]; [NS91]: exp.under ambient aerobic conditions; experiments were performed at IS = 0.1 M NaNO3, values were corrected for IS = 0; sorption reaction not given, only surface species; sorption behavior is probably a combination of ion exchange at intercrystalline sites and surface complexation along edge sites; other site types (Fe, Mg) may probably also contribute to pH-dependent surface charge; uncertainty represents standard deviation 1sigma; [NS91]: exp.under ambient aerobic conditions; here assumed that CO2 free!! |
|