Mineral: |
Bentonite |
Reference: |
MGLAK09 |
SCM Type: |
CDM - (CD-)MUSIC |
Ligand: |
SeO3<2->
- selenite
|
Site Type: |
»Al-doubly |
Equation: |
2 X-OH + SeO3<2-> + 3 H<1+> ⇔ (»X-O)2-SeOH<1+> + 2 H2O |
LogK: |
23.3 LogK°I=0 (Conversion to I = 0): 23.90
|
Experiment: |
Batch Sorption Experiments |
Ionic Strength: |
0.05 mol/L
NaNO3
|
Temperature: |
298.15 K |
pH Range: |
3-10 |
Ligand Concentration Range: |
5E-7 mol/L |
Fit Method: |
PHREEQC |
Comment: |
original reaction equation: H2SeO3 + »X-OH2<1+> + »X-OH = (»X-O)2-SeOH<1+> + 2H2O, logK = 7.5; site type: Al(Oh) - O - Al(Oh); S/L ratio ranged from 5 - 40 g/L; transformation to 2 »X-OH + H2SeO3 + H<1+> = (»X-O)2-SeOH<1+> + 2 H2O with logK = 12.3; SeO3<2-> +2H<1+> = H2SeO3, logK = 11.0 [ONOOR05] |
|