RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: Ferrihydrite
Reference: TFBDL96
SCM Type: TL - Triple Layer
Ligand: Ca<2+> - calcium
Site Type: »Fe-OH
Equation: »Fe-OH + Ca<2+>  ⇔  »Fe-O-Ca<1+> + H<1+>
LogK: -2.36 ± 1.68
Experiment: Batch Sorption Experiments
Ionic Strength: lake water
pH Range: 7.40
Fit Method: Unknown
Comment: no protolysis constants, SSD, SSA; diagenetic Fe oxyhydroxide isolated in situ by vertically inserting inert collectors into the sediment of McFarlane lake located near Sudbury, Ontario; circumneutral McFarlane (pH=7.40); predominantly ferrihydrite; C(org)/Fe molar ratio 2.3/-1.0 (humic acid, fulvic acid); traces of Cd, Cu, Ni, Pb, Zn; overlying water with 410+/-39 µM Ca, 214+/-8 µM Mg, 1430+/-60 µM Na, 33+/-8 mM K, 227+/-14 µM SO4, 1790+/-35 µM Cl, c(org) 5.2+/-1.2 mg C/l
 
1 data sets were retrieved