RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

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Surface Complex Formation Data:

Mineral: Goethite
Reference: LAWJ04
SCM Type: ECC - Extended Constant Capacitance
Ligand: Cd<2+> - cadmium
Site Type: »Fe-OH
Equation: »Fe-OH + 2 Cd<2+> + cit<3-> + H2O  ⇔  (»FeOCd-citCdOH)<1-> + 2 H<1+>
LogK: -12.74        LogK°I=0 (Conversion to I = 0):   -12.07         LogK2.31 nm−2 (SSD-normalized):   -12.02
Ionic Strength: 0.01 mol/L KClO4
Temperature: 298.15 K
pH Range: 3-9.5
Ligand Concentration Range: 5E-5 mol/L
Fit Method:
Comment: 0.6053 g goethite added to 300 ml of 10 mM KClO4; original equation in the study »Fe-OH + 2 Cd<2+> + cit<3-> + 2OH<1-> = (»FeOCd-citCdOH)<1-> + H2O with logK = 1.26; formation constant logK = -14.001144 for the equation H2O(l) = H<1+> + OH<1->
 
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