RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Show Detailed Site Query Results


Binding Site Data:

Mineral: amorphous Silica
Reference: G98
SCM Type: CC - Constant Capacitance   (C1: 7.0 F/m2)
Ionic Strength: 0.0 mol/L of NaNO3
Site Type: »Si-OH
PZC:
pK1: pK1°I=0 (Conversion to I = 0):  
pK2: 6.98 pK2°I=0 (Conversion to I = 0): 6.98 pK22.31 nm−2 (normalized): 7.08
Site Density in nm-2: 1.8141
Original Site Density: 0.00051 mol / L solution
Solid/Liquid Ratio in g/L: 1.0
pH Range:
Temperature in K:
Method for Site Density: Literature
Method for Protolysis:Not Specified
Fit Method:FITEQL
Comment: manuscript published as [GCSVB01] with other parameters and other pK/logK, data for I = 0; pK was assumed to be 6.94 (IS=0.01M) in accordance with [O95b] and [CSSFZ93 ], given protolysis reaction: -Si(OH)2 = -SiO2H- + H+; pK was adjusted using experimentally obtained charges of the silica surface from [A70], [B576] and [C94]; [=Si(OH)2]total=0.51mM (2.31sites/nm^2 [DK90]), [H2CO3]free=16.4µM, [H4SiO4]total=0.9mM
 
1 data sets were retrieved