Mineral: |
Illite |
Reference: |
GE07 |
SCM Type: |
CC - Constant Capacitance |
Ligand: |
Cd<2+>
- cadmium
|
Site Type: |
»X-OH |
Equation: |
»X-OH + Cd<2+> ⇔ »X-O-Cd<1+> + H<1+> |
LogK: |
-3.47 LogK°I=0 (Conversion to I = 0): -3.15
LogK2.31 nm−2 (SSD-normalized): 0.30
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
0.1 mol/L
NaNO3
|
Temperature: |
298.15 K |
Solid/Liquid Ratio: |
2.97 g/L |
pH Range: |
3-9 |
Ligand Concentration Range: |
4.96E-5 mol/L |
Fit Method: |
FITEQL |
Comment: |
complexation on the edge site; at 0.01 and 0.001M the amount of metal adsorbed on the surface sites was large compared to that on the edge sites, therefore the logK(=XOCd+), calculated by FITEQL, on these edge sites was extremely small; logK of this ionic strength was used for the lower ionic strengths (activity coefficients were adjusted with the aid of the Davies equation): 0.01M: logK=-3.65; 0.011M: logK=-3.73 |
|